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From afec30f5caf4b051827ffdd822ebd27c58219fee Mon Sep 17 00:00:00 2001
From: Stefan Becker <stefanb@gpartner-nvidia.com>
Date: Tue, 22 Mar 2016 13:48:07 +0200
Subject: [PATCH 01/11] Add GNU make jobserver client support
- add new TokenPool interface
- GNU make implementation for TokenPool parses and verifies the magic
information from the MAKEFLAGS environment variable
- RealCommandRunner tries to acquire TokenPool
* if no token pool is available then there is no change in behaviour
- When a token pool is available then RealCommandRunner behaviour
changes as follows
* CanRunMore() only returns true if TokenPool::Acquire() returns true
* StartCommand() calls TokenPool::Reserve()
* WaitForCommand() calls TokenPool::Release()
Documentation for GNU make jobserver
http://make.mad-scientist.net/papers/jobserver-implementation/
Fixes https://github.com/ninja-build/ninja/issues/1139
---
configure.py | 2 +
src/build.cc | 63 ++++++++----
src/build.h | 3 +
src/tokenpool-gnu-make.cc | 211 ++++++++++++++++++++++++++++++++++++++
src/tokenpool-none.cc | 27 +++++
src/tokenpool.h | 26 +++++
6 files changed, 310 insertions(+), 22 deletions(-)
create mode 100644 src/tokenpool-gnu-make.cc
create mode 100644 src/tokenpool-none.cc
create mode 100644 src/tokenpool.h
--- a/configure.py
+++ b/configure.py
@@ -517,11 +517,13 @@ for name in ['build',
'state',
'status',
'string_piece_util',
+ 'tokenpool-gnu-make',
'util',
'version']:
objs += cxx(name, variables=cxxvariables)
if platform.is_windows():
for name in ['subprocess-win32',
+ 'tokenpool-gnu-make-win32',
'includes_normalize-win32',
'msvc_helper-win32',
'msvc_helper_main-win32']:
@@ -530,7 +532,9 @@ if platform.is_windows():
objs += cxx('minidump-win32', variables=cxxvariables)
objs += cc('getopt')
else:
- objs += cxx('subprocess-posix')
+ for name in ['subprocess-posix',
+ 'tokenpool-gnu-make-posix']:
+ objs += cxx(name)
if platform.is_aix():
objs += cc('getopt')
if platform.is_msvc():
@@ -588,6 +592,7 @@ for name in ['build_log_test',
'string_piece_util_test',
'subprocess_test',
'test',
+ 'tokenpool_test',
'util_test']:
objs += cxx(name, variables=cxxvariables)
if platform.is_windows():
--- a/src/build.cc
+++ b/src/build.cc
@@ -35,6 +35,7 @@
#include "state.h"
#include "status.h"
#include "subprocess.h"
+#include "tokenpool.h"
#include "util.h"
using namespace std;
@@ -47,8 +48,9 @@ struct DryRunCommandRunner : public Comm
// Overridden from CommandRunner:
virtual bool CanRunMore() const;
+ virtual bool AcquireToken();
virtual bool StartCommand(Edge* edge);
- virtual bool WaitForCommand(Result* result);
+ virtual bool WaitForCommand(Result* result, bool more_ready);
private:
queue<Edge*> finished_;
@@ -58,12 +60,16 @@ bool DryRunCommandRunner::CanRunMore() c
return true;
}
+bool DryRunCommandRunner::AcquireToken() {
+ return true;
+}
+
bool DryRunCommandRunner::StartCommand(Edge* edge) {
finished_.push(edge);
return true;
}
-bool DryRunCommandRunner::WaitForCommand(Result* result) {
+bool DryRunCommandRunner::WaitForCommand(Result* result, bool more_ready) {
if (finished_.empty())
return false;
@@ -149,7 +155,7 @@ void Plan::EdgeWanted(const Edge* edge)
}
Edge* Plan::FindWork() {
- if (ready_.empty())
+ if (!more_ready())
return NULL;
EdgeSet::iterator e = ready_.begin();
Edge* edge = *e;
@@ -448,19 +454,39 @@ void Plan::Dump() const {
}
struct RealCommandRunner : public CommandRunner {
- explicit RealCommandRunner(const BuildConfig& config) : config_(config) {}
- virtual ~RealCommandRunner() {}
+ explicit RealCommandRunner(const BuildConfig& config);
+ virtual ~RealCommandRunner();
virtual bool CanRunMore() const;
+ virtual bool AcquireToken();
virtual bool StartCommand(Edge* edge);
- virtual bool WaitForCommand(Result* result);
+ virtual bool WaitForCommand(Result* result, bool more_ready);
virtual vector<Edge*> GetActiveEdges();
virtual void Abort();
const BuildConfig& config_;
+ // copy of config_.max_load_average; can be modified by TokenPool setup
+ double max_load_average_;
SubprocessSet subprocs_;
+ TokenPool* tokens_;
map<const Subprocess*, Edge*> subproc_to_edge_;
};
+RealCommandRunner::RealCommandRunner(const BuildConfig& config) : config_(config) {
+ max_load_average_ = config.max_load_average;
+ if ((tokens_ = TokenPool::Get()) != NULL) {
+ if (!tokens_->Setup(config_.parallelism_from_cmdline,
+ config_.verbosity == BuildConfig::VERBOSE,
+ max_load_average_)) {
+ delete tokens_;
+ tokens_ = NULL;
+ }
+ }
+}
+
+RealCommandRunner::~RealCommandRunner() {
+ delete tokens_;
+}
+
vector<Edge*> RealCommandRunner::GetActiveEdges() {
vector<Edge*> edges;
for (map<const Subprocess*, Edge*>::iterator e = subproc_to_edge_.begin();
@@ -471,14 +497,23 @@ vector<Edge*> RealCommandRunner::GetActi
void RealCommandRunner::Abort() {
subprocs_.Clear();
+ if (tokens_)
+ tokens_->Clear();
}
bool RealCommandRunner::CanRunMore() const {
- size_t subproc_number =
- subprocs_.running_.size() + subprocs_.finished_.size();
- return (int)subproc_number < config_.parallelism
- && ((subprocs_.running_.empty() || config_.max_load_average <= 0.0f)
- || GetLoadAverage() < config_.max_load_average);
+ bool parallelism_limit_not_reached =
+ tokens_ || // ignore config_.parallelism
+ ((int) (subprocs_.running_.size() +
+ subprocs_.finished_.size()) < config_.parallelism);
+ return parallelism_limit_not_reached
+ && (subprocs_.running_.empty() ||
+ (max_load_average_ <= 0.0f ||
+ GetLoadAverage() < max_load_average_));
+}
+
+bool RealCommandRunner::AcquireToken() {
+ return (!tokens_ || tokens_->Acquire());
}
bool RealCommandRunner::StartCommand(Edge* edge) {
@@ -486,19 +521,33 @@ bool RealCommandRunner::StartCommand(Edg
Subprocess* subproc = subprocs_.Add(command, edge->use_console());
if (!subproc)
return false;
+ if (tokens_)
+ tokens_->Reserve();
subproc_to_edge_.insert(make_pair(subproc, edge));
return true;
}
-bool RealCommandRunner::WaitForCommand(Result* result) {
+bool RealCommandRunner::WaitForCommand(Result* result, bool more_ready) {
Subprocess* subproc;
- while ((subproc = subprocs_.NextFinished()) == NULL) {
- bool interrupted = subprocs_.DoWork();
+ subprocs_.ResetTokenAvailable();
+ while (((subproc = subprocs_.NextFinished()) == NULL) &&
+ !subprocs_.IsTokenAvailable()) {
+ bool interrupted = subprocs_.DoWork(more_ready ? tokens_ : NULL);
if (interrupted)
return false;
}
+ // token became available
+ if (subproc == NULL) {
+ result->status = ExitTokenAvailable;
+ return true;
+ }
+
+ // command completed
+ if (tokens_)
+ tokens_->Release();
+
result->status = subproc->Finish();
result->output = subproc->GetOutput();
@@ -620,38 +669,43 @@ bool Builder::Build(string* err) {
// command runner.
// Second, we attempt to wait for / reap the next finished command.
while (plan_.more_to_do()) {
- // See if we can start any more commands.
- if (failures_allowed && command_runner_->CanRunMore()) {
- if (Edge* edge = plan_.FindWork()) {
- if (edge->GetBindingBool("generator")) {
+ // See if we can start any more commands...
+ bool can_run_more =
+ failures_allowed &&
+ plan_.more_ready() &&
+ command_runner_->CanRunMore();
+
+ // ... but we also need a token to do that.
+ if (can_run_more && command_runner_->AcquireToken()) {
+ Edge* edge = plan_.FindWork();
+ if (edge->GetBindingBool("generator")) {
scan_.build_log()->Close();
}
- if (!StartEdge(edge, err)) {
+ if (!StartEdge(edge, err)) {
+ Cleanup();
+ status_->BuildFinished();
+ return false;
+ }
+
+ if (edge->is_phony()) {
+ if (!plan_.EdgeFinished(edge, Plan::kEdgeSucceeded, err)) {
Cleanup();
status_->BuildFinished();
return false;
}
-
- if (edge->is_phony()) {
- if (!plan_.EdgeFinished(edge, Plan::kEdgeSucceeded, err)) {
- Cleanup();
- status_->BuildFinished();
- return false;
- }
- } else {
- ++pending_commands;
- }
-
- // We made some progress; go back to the main loop.
- continue;
+ } else {
+ ++pending_commands;
}
+
+ // We made some progress; go back to the main loop.
+ continue;
}
// See if we can reap any finished commands.
if (pending_commands) {
CommandRunner::Result result;
- if (!command_runner_->WaitForCommand(&result) ||
+ if (!command_runner_->WaitForCommand(&result, can_run_more) ||
result.status == ExitInterrupted) {
Cleanup();
status_->BuildFinished();
@@ -659,6 +713,10 @@ bool Builder::Build(string* err) {
return false;
}
+ // We might be able to start another command; start the main loop over.
+ if (result.status == ExitTokenAvailable)
+ continue;
+
--pending_commands;
if (!FinishCommand(&result, err)) {
Cleanup();
--- a/src/build.h
+++ b/src/build.h
@@ -52,6 +52,9 @@ struct Plan {
/// Returns true if there's more work to be done.
bool more_to_do() const { return wanted_edges_ > 0 && command_edges_ > 0; }
+ /// Returns true if there's more edges ready to start
+ bool more_ready() const { return !ready_.empty(); }
+
/// Dumps the current state of the plan.
void Dump() const;
@@ -136,6 +139,7 @@ private:
struct CommandRunner {
virtual ~CommandRunner() {}
virtual bool CanRunMore() const = 0;
+ virtual bool AcquireToken() = 0;
virtual bool StartCommand(Edge* edge) = 0;
/// The result of waiting for a command.
@@ -147,7 +151,9 @@ struct CommandRunner {
bool success() const { return status == ExitSuccess; }
};
/// Wait for a command to complete, or return false if interrupted.
- virtual bool WaitForCommand(Result* result) = 0;
+ /// If more_ready is true then the optional TokenPool is monitored too
+ /// and we return when a token becomes available.
+ virtual bool WaitForCommand(Result* result, bool more_ready) = 0;
virtual std::vector<Edge*> GetActiveEdges() { return std::vector<Edge*>(); }
virtual void Abort() {}
@@ -155,7 +161,8 @@ struct CommandRunner {
/// Options (e.g. verbosity, parallelism) passed to a build.
struct BuildConfig {
- BuildConfig() : verbosity(NORMAL), dry_run(false), parallelism(1),
+ BuildConfig() : verbosity(NORMAL), dry_run(false),
+ parallelism(1), parallelism_from_cmdline(false),
failures_allowed(1), max_load_average(-0.0f) {}
enum Verbosity {
@@ -167,6 +174,7 @@ struct BuildConfig {
Verbosity verbosity;
bool dry_run;
int parallelism;
+ bool parallelism_from_cmdline;
int failures_allowed;
/// The maximum load average we must not exceed. A negative value
/// means that we do not have any limit.
--- /dev/null
+++ b/src/tokenpool-gnu-make.cc
@@ -0,0 +1,108 @@
+// Copyright 2016-2018 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "tokenpool-gnu-make.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "line_printer.h"
+
+// TokenPool implementation for GNU make jobserver - common bits
+// every instance owns an implicit token -> available_ == 1
+GNUmakeTokenPool::GNUmakeTokenPool() : available_(1), used_(0) {
+}
+
+GNUmakeTokenPool::~GNUmakeTokenPool() {
+}
+
+bool GNUmakeTokenPool::Setup(bool ignore,
+ bool verbose,
+ double& max_load_average) {
+ const char* value = GetEnv("MAKEFLAGS");
+ if (!value)
+ return false;
+
+ // GNU make <= 4.1
+ const char* jobserver = strstr(value, "--jobserver-fds=");
+ if (!jobserver)
+ // GNU make => 4.2
+ jobserver = strstr(value, "--jobserver-auth=");
+ if (jobserver) {
+ LinePrinter printer;
+
+ if (ignore) {
+ printer.PrintOnNewLine("ninja: warning: -jN forced on command line; ignoring GNU make jobserver.\n");
+ } else {
+ if (ParseAuth(jobserver)) {
+ const char* l_arg = strstr(value, " -l");
+ int load_limit = -1;
+
+ if (verbose) {
+ printer.PrintOnNewLine("ninja: using GNU make jobserver.\n");
+ }
+
+ // translate GNU make -lN to ninja -lN
+ if (l_arg &&
+ (sscanf(l_arg + 3, "%d ", &load_limit) == 1) &&
+ (load_limit > 0)) {
+ max_load_average = load_limit;
+ }
+
+ return true;
+ }
+ }
+ }
+
+ return false;
+}
+
+bool GNUmakeTokenPool::Acquire() {
+ if (available_ > 0)
+ return true;
+
+ if (AcquireToken()) {
+ // token acquired
+ available_++;
+ return true;
+ }
+
+ // no token available
+ return false;
+}
+
+void GNUmakeTokenPool::Reserve() {
+ available_--;
+ used_++;
+}
+
+void GNUmakeTokenPool::Return() {
+ if (ReturnToken())
+ available_--;
+}
+
+void GNUmakeTokenPool::Release() {
+ available_++;
+ used_--;
+ if (available_ > 1)
+ Return();
+}
+
+void GNUmakeTokenPool::Clear() {
+ while (used_ > 0)
+ Release();
+ while (available_ > 1)
+ Return();
+}
--- /dev/null
+++ b/src/tokenpool.h
@@ -0,0 +1,42 @@
+// Copyright 2016-2018 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifdef _WIN32
+#include <windows.h>
+#endif
+
+// interface to token pool
+struct TokenPool {
+ virtual ~TokenPool() {}
+
+ virtual bool Acquire() = 0;
+ virtual void Reserve() = 0;
+ virtual void Release() = 0;
+ virtual void Clear() = 0;
+
+ // returns false if token pool setup failed
+ virtual bool Setup(bool ignore, bool verbose, double& max_load_average) = 0;
+
+#ifdef _WIN32
+ virtual void WaitForTokenAvailability(HANDLE ioport) = 0;
+ // returns true if a token has become available
+ // key is result from GetQueuedCompletionStatus()
+ virtual bool TokenIsAvailable(ULONG_PTR key) = 0;
+#else
+ virtual int GetMonitorFd() = 0;
+#endif
+
+ // returns NULL if token pool is not available
+ static TokenPool* Get();
+};
--- a/src/build_test.cc
+++ b/src/build_test.cc
@@ -15,6 +15,7 @@
#include "build.h"
#include <assert.h>
+#include <stdarg.h>
#include "build_log.h"
#include "deps_log.h"
@@ -474,8 +475,9 @@ struct FakeCommandRunner : public Comman
// CommandRunner impl
virtual bool CanRunMore() const;
+ virtual bool AcquireToken();
virtual bool StartCommand(Edge* edge);
- virtual bool WaitForCommand(Result* result);
+ virtual bool WaitForCommand(Result* result, bool more_ready);
virtual vector<Edge*> GetActiveEdges();
virtual void Abort();
@@ -578,6 +580,10 @@ bool FakeCommandRunner::CanRunMore() con
return active_edges_.size() < max_active_edges_;
}
+bool FakeCommandRunner::AcquireToken() {
+ return true;
+}
+
bool FakeCommandRunner::StartCommand(Edge* edge) {
assert(active_edges_.size() < max_active_edges_);
assert(find(active_edges_.begin(), active_edges_.end(), edge)
@@ -649,7 +655,7 @@ bool FakeCommandRunner::StartCommand(Edg
return true;
}
-bool FakeCommandRunner::WaitForCommand(Result* result) {
+bool FakeCommandRunner::WaitForCommand(Result* result, bool more_ready) {
if (active_edges_.empty())
return false;
@@ -3985,3 +3991,356 @@ TEST_F(BuildTest, ValidationWithCircular
EXPECT_FALSE(builder_.AddTarget("out", &err));
EXPECT_EQ("dependency cycle: validate -> validate_in -> validate", err);
}
+
+/// The token tests are concerned with the main loop functionality when
+// the CommandRunner has an active TokenPool. It is therefore intentional
+// that the plan doesn't complete and that builder_.Build() returns false!
+
+/// Fake implementation of CommandRunner that simulates a TokenPool
+struct FakeTokenCommandRunner : public CommandRunner {
+ explicit FakeTokenCommandRunner() {}
+
+ // CommandRunner impl
+ virtual bool CanRunMore() const;
+ virtual bool AcquireToken();
+ virtual bool StartCommand(Edge* edge);
+ virtual bool WaitForCommand(Result* result, bool more_ready);
+ virtual vector<Edge*> GetActiveEdges();
+ virtual void Abort();
+
+ vector<string> commands_ran_;
+ vector<Edge *> edges_;
+
+ vector<bool> acquire_token_;
+ vector<bool> can_run_more_;
+ vector<bool> wait_for_command_;
+};
+
+bool FakeTokenCommandRunner::CanRunMore() const {
+ if (can_run_more_.size() == 0) {
+ EXPECT_FALSE("unexpected call to CommandRunner::CanRunMore()");
+ return false;
+ }
+
+ bool result = can_run_more_[0];
+
+ // Unfortunately CanRunMore() isn't "const" for tests
+ const_cast<FakeTokenCommandRunner*>(this)->can_run_more_.erase(
+ const_cast<FakeTokenCommandRunner*>(this)->can_run_more_.begin()
+ );
+
+ return result;
+}
+
+bool FakeTokenCommandRunner::AcquireToken() {
+ if (acquire_token_.size() == 0) {
+ EXPECT_FALSE("unexpected call to CommandRunner::AcquireToken()");
+ return false;
+ }
+
+ bool result = acquire_token_[0];
+ acquire_token_.erase(acquire_token_.begin());
+ return result;
+}
+
+bool FakeTokenCommandRunner::StartCommand(Edge* edge) {
+ commands_ran_.push_back(edge->EvaluateCommand());
+ edges_.push_back(edge);
+ return true;
+}
+
+bool FakeTokenCommandRunner::WaitForCommand(Result* result, bool more_ready) {
+ if (wait_for_command_.size() == 0) {
+ EXPECT_FALSE("unexpected call to CommandRunner::WaitForCommand()");
+ return false;
+ }
+
+ bool expected = wait_for_command_[0];
+ if (expected != more_ready) {
+ EXPECT_EQ(expected, more_ready);
+ return false;
+ }
+ wait_for_command_.erase(wait_for_command_.begin());
+
+ if (edges_.size() == 0)
+ return false;
+
+ Edge* edge = edges_[0];
+ result->edge = edge;
+
+ if (more_ready &&
+ (edge->rule().name() == "token-available")) {
+ result->status = ExitTokenAvailable;
+ } else {
+ edges_.erase(edges_.begin());
+ result->status = ExitSuccess;
+ }
+
+ return true;
+}
+
+vector<Edge*> FakeTokenCommandRunner::GetActiveEdges() {
+ return edges_;
+}
+
+void FakeTokenCommandRunner::Abort() {
+ edges_.clear();
+}
+
+struct BuildTokenTest : public BuildTest {
+ virtual void SetUp();
+ virtual void TearDown();
+
+ FakeTokenCommandRunner token_command_runner_;
+
+ void ExpectAcquireToken(int count, ...);
+ void ExpectCanRunMore(int count, ...);
+ void ExpectWaitForCommand(int count, ...);
+
+private:
+ void EnqueueBooleans(vector<bool>& booleans, int count, va_list ap);
+};
+
+void BuildTokenTest::SetUp() {
+ BuildTest::SetUp();
+
+ // replace FakeCommandRunner with FakeTokenCommandRunner
+ builder_.command_runner_.release();
+ builder_.command_runner_.reset(&token_command_runner_);
+}
+void BuildTokenTest::TearDown() {
+ EXPECT_EQ(0u, token_command_runner_.acquire_token_.size());
+ EXPECT_EQ(0u, token_command_runner_.can_run_more_.size());
+ EXPECT_EQ(0u, token_command_runner_.wait_for_command_.size());
+
+ BuildTest::TearDown();
+}
+
+void BuildTokenTest::ExpectAcquireToken(int count, ...) {
+ va_list ap;
+ va_start(ap, count);
+ EnqueueBooleans(token_command_runner_.acquire_token_, count, ap);
+ va_end(ap);
+}
+
+void BuildTokenTest::ExpectCanRunMore(int count, ...) {
+ va_list ap;
+ va_start(ap, count);
+ EnqueueBooleans(token_command_runner_.can_run_more_, count, ap);
+ va_end(ap);
+}
+
+void BuildTokenTest::ExpectWaitForCommand(int count, ...) {
+ va_list ap;
+ va_start(ap, count);
+ EnqueueBooleans(token_command_runner_.wait_for_command_, count, ap);
+ va_end(ap);
+}
+
+void BuildTokenTest::EnqueueBooleans(vector<bool>& booleans, int count, va_list ap) {
+ while (count--) {
+ int value = va_arg(ap, int);
+ booleans.push_back(!!value); // force bool
+ }
+}
+
+TEST_F(BuildTokenTest, DoNotAquireToken) {
+ // plan should execute one command
+ string err;
+ EXPECT_TRUE(builder_.AddTarget("cat1", &err));
+ ASSERT_EQ("", err);
+
+ // pretend we can't run anything
+ ExpectCanRunMore(1, false);
+
+ EXPECT_FALSE(builder_.Build(&err));
+ EXPECT_EQ("stuck [this is a bug]", err);
+
+ EXPECT_EQ(0u, token_command_runner_.commands_ran_.size());
+}
+
+TEST_F(BuildTokenTest, DoNotStartWithoutToken) {
+ // plan should execute one command
+ string err;
+ EXPECT_TRUE(builder_.AddTarget("cat1", &err));
+ ASSERT_EQ("", err);
+
+ // we could run a command but do not have a token for it
+ ExpectCanRunMore(1, true);
+ ExpectAcquireToken(1, false);
+
+ EXPECT_FALSE(builder_.Build(&err));
+ EXPECT_EQ("stuck [this is a bug]", err);
+
+ EXPECT_EQ(0u, token_command_runner_.commands_ran_.size());
+}
+
+TEST_F(BuildTokenTest, CompleteOneStep) {
+ // plan should execute one command
+ string err;
+ EXPECT_TRUE(builder_.AddTarget("cat1", &err));
+ ASSERT_EQ("", err);
+
+ // allow running of one command
+ ExpectCanRunMore(1, true);
+ ExpectAcquireToken(1, true);
+ // block and wait for command to finalize
+ ExpectWaitForCommand(1, false);
+
+ EXPECT_TRUE(builder_.Build(&err));
+ EXPECT_EQ("", err);
+
+ EXPECT_EQ(1u, token_command_runner_.commands_ran_.size());
+ EXPECT_TRUE(token_command_runner_.commands_ran_[0] == "cat in1 > cat1");
+}
+
+TEST_F(BuildTokenTest, AcquireOneToken) {
+ // plan should execute more than one command
+ string err;
+ EXPECT_TRUE(builder_.AddTarget("cat12", &err));
+ ASSERT_EQ("", err);
+
+ // allow running of one command
+ ExpectCanRunMore(3, true, false, false);
+ ExpectAcquireToken(1, true);
+ // block and wait for command to finalize
+ ExpectWaitForCommand(1, false);
+
+ EXPECT_FALSE(builder_.Build(&err));
+ EXPECT_EQ("stuck [this is a bug]", err);
+
+ EXPECT_EQ(1u, token_command_runner_.commands_ran_.size());
+ // any of the two dependencies could have been executed
+ EXPECT_TRUE(token_command_runner_.commands_ran_[0] == "cat in1 > cat1" ||
+ token_command_runner_.commands_ran_[0] == "cat in1 in2 > cat2");
+}
+
+TEST_F(BuildTokenTest, WantTwoTokens) {
+ // plan should execute more than one command
+ string err;
+ EXPECT_TRUE(builder_.AddTarget("cat12", &err));
+ ASSERT_EQ("", err);
+
+ // allow running of one command
+ ExpectCanRunMore(3, true, true, false);
+ ExpectAcquireToken(2, true, false);
+ // wait for command to finalize or token to become available
+ ExpectWaitForCommand(1, true);
+
+ EXPECT_FALSE(builder_.Build(&err));
+ EXPECT_EQ("stuck [this is a bug]", err);
+
+ EXPECT_EQ(1u, token_command_runner_.commands_ran_.size());
+ // any of the two dependencies could have been executed
+ EXPECT_TRUE(token_command_runner_.commands_ran_[0] == "cat in1 > cat1" ||
+ token_command_runner_.commands_ran_[0] == "cat in1 in2 > cat2");
+}
+
+TEST_F(BuildTokenTest, CompleteTwoSteps) {
+ ASSERT_NO_FATAL_FAILURE(AssertParse(&state_,
+"build out1: cat in1\n"
+"build out2: cat out1\n"));
+
+ // plan should execute more than one command
+ string err;
+ EXPECT_TRUE(builder_.AddTarget("out2", &err));
+ ASSERT_EQ("", err);
+
+ // allow running of two commands
+ ExpectCanRunMore(2, true, true);
+ ExpectAcquireToken(2, true, true);
+ // wait for commands to finalize
+ ExpectWaitForCommand(2, false, false);
+
+ EXPECT_TRUE(builder_.Build(&err));
+ EXPECT_EQ("", err);
+
+ EXPECT_EQ(2u, token_command_runner_.commands_ran_.size());
+ EXPECT_TRUE(token_command_runner_.commands_ran_[0] == "cat in1 > out1");
+ EXPECT_TRUE(token_command_runner_.commands_ran_[1] == "cat out1 > out2");
+}
+
+TEST_F(BuildTokenTest, TwoCommandsInParallel) {
+ ASSERT_NO_FATAL_FAILURE(AssertParse(&state_,
+"rule token-available\n"
+" command = cat $in > $out\n"
+"build out1: token-available in1\n"
+"build out2: token-available in2\n"
+"build out12: cat out1 out2\n"));
+
+ // plan should execute more than one command
+ string err;
+ EXPECT_TRUE(builder_.AddTarget("out12", &err));
+ ASSERT_EQ("", err);
+
+ // 1st command: token available -> allow running
+ // 2nd command: no token available but becomes available later
+ ExpectCanRunMore(4, true, true, true, false);
+ ExpectAcquireToken(3, true, false, true);
+ // 1st call waits for command to finalize or token to become available
+ // 2nd call waits for command to finalize
+ // 3rd call waits for command to finalize
+ ExpectWaitForCommand(3, true, false, false);
+
+ EXPECT_FALSE(builder_.Build(&err));
+ EXPECT_EQ("stuck [this is a bug]", err);
+
+ EXPECT_EQ(2u, token_command_runner_.commands_ran_.size());
+ EXPECT_TRUE((token_command_runner_.commands_ran_[0] == "cat in1 > out1" &&
+ token_command_runner_.commands_ran_[1] == "cat in2 > out2") ||
+ (token_command_runner_.commands_ran_[0] == "cat in2 > out2" &&
+ token_command_runner_.commands_ran_[1] == "cat in1 > out1"));
+}
+
+TEST_F(BuildTokenTest, CompleteThreeStepsSerial) {
+ // plan should execute more than one command
+ string err;
+ EXPECT_TRUE(builder_.AddTarget("cat12", &err));
+ ASSERT_EQ("", err);
+
+ // allow running of all commands
+ ExpectCanRunMore(4, true, true, true, true);
+ ExpectAcquireToken(4, true, false, true, true);
+ // wait for commands to finalize
+ ExpectWaitForCommand(3, true, false, false);
+
+ EXPECT_TRUE(builder_.Build(&err));
+ EXPECT_EQ("", err);
+
+ EXPECT_EQ(3u, token_command_runner_.commands_ran_.size());
+ EXPECT_TRUE((token_command_runner_.commands_ran_[0] == "cat in1 > cat1" &&
+ token_command_runner_.commands_ran_[1] == "cat in1 in2 > cat2") ||
+ (token_command_runner_.commands_ran_[0] == "cat in1 in2 > cat2" &&
+ token_command_runner_.commands_ran_[1] == "cat in1 > cat1" ));
+ EXPECT_TRUE(token_command_runner_.commands_ran_[2] == "cat cat1 cat2 > cat12");
+}
+
+TEST_F(BuildTokenTest, CompleteThreeStepsParallel) {
+ ASSERT_NO_FATAL_FAILURE(AssertParse(&state_,
+"rule token-available\n"
+" command = cat $in > $out\n"
+"build out1: token-available in1\n"
+"build out2: token-available in2\n"
+"build out12: cat out1 out2\n"));
+
+ // plan should execute more than one command
+ string err;
+ EXPECT_TRUE(builder_.AddTarget("out12", &err));
+ ASSERT_EQ("", err);
+
+ // allow running of all commands
+ ExpectCanRunMore(4, true, true, true, true);
+ ExpectAcquireToken(4, true, false, true, true);
+ // wait for commands to finalize
+ ExpectWaitForCommand(4, true, false, false, false);
+
+ EXPECT_TRUE(builder_.Build(&err));
+ EXPECT_EQ("", err);
+
+ EXPECT_EQ(3u, token_command_runner_.commands_ran_.size());
+ EXPECT_TRUE((token_command_runner_.commands_ran_[0] == "cat in1 > out1" &&
+ token_command_runner_.commands_ran_[1] == "cat in2 > out2") ||
+ (token_command_runner_.commands_ran_[0] == "cat in2 > out2" &&
+ token_command_runner_.commands_ran_[1] == "cat in1 > out1"));
+ EXPECT_TRUE(token_command_runner_.commands_ran_[2] == "cat out1 out2 > out12");
+}
--- a/src/exit_status.h
+++ b/src/exit_status.h
@@ -18,7 +18,8 @@
enum ExitStatus {
ExitSuccess,
ExitFailure,
- ExitInterrupted
+ ExitTokenAvailable,
+ ExitInterrupted,
};
#endif // NINJA_EXIT_STATUS_H_
--- a/src/subprocess-posix.cc
+++ b/src/subprocess-posix.cc
@@ -13,6 +13,7 @@
// limitations under the License.
#include "subprocess.h"
+#include "tokenpool.h"
#include <sys/select.h>
#include <assert.h>
@@ -249,7 +250,7 @@ Subprocess *SubprocessSet::Add(const str
}
#ifdef USE_PPOLL
-bool SubprocessSet::DoWork() {
+bool SubprocessSet::DoWork(TokenPool* tokens) {
vector<pollfd> fds;
nfds_t nfds = 0;
@@ -263,6 +264,12 @@ bool SubprocessSet::DoWork() {
++nfds;
}
+ if (tokens) {
+ pollfd pfd = { tokens->GetMonitorFd(), POLLIN | POLLPRI, 0 };
+ fds.push_back(pfd);
+ ++nfds;
+ }
+
interrupted_ = 0;
int ret = ppoll(&fds.front(), nfds, NULL, &old_mask_);
if (ret == -1) {
@@ -295,11 +302,20 @@ bool SubprocessSet::DoWork() {
++i;
}
+ if (tokens) {
+ pollfd *pfd = &fds[nfds - 1];
+ if (pfd->fd >= 0) {
+ assert(pfd->fd == tokens->GetMonitorFd());
+ if (pfd->revents != 0)
+ token_available_ = true;
+ }
+ }
+
return IsInterrupted();
}
#else // !defined(USE_PPOLL)
-bool SubprocessSet::DoWork() {
+bool SubprocessSet::DoWork(TokenPool* tokens) {
fd_set set;
int nfds = 0;
FD_ZERO(&set);
@@ -314,6 +330,13 @@ bool SubprocessSet::DoWork() {
}
}
+ if (tokens) {
+ int fd = tokens->GetMonitorFd();
+ FD_SET(fd, &set);
+ if (nfds < fd+1)
+ nfds = fd+1;
+ }
+
interrupted_ = 0;
int ret = pselect(nfds, &set, 0, 0, 0, &old_mask_);
if (ret == -1) {
@@ -342,6 +365,12 @@ bool SubprocessSet::DoWork() {
++i;
}
+ if (tokens) {
+ int fd = tokens->GetMonitorFd();
+ if ((fd >= 0) && FD_ISSET(fd, &set))
+ token_available_ = true;
+ }
+
return IsInterrupted();
}
#endif // !defined(USE_PPOLL)
--- a/src/subprocess-win32.cc
+++ b/src/subprocess-win32.cc
@@ -13,6 +13,7 @@
// limitations under the License.
#include "subprocess.h"
+#include "tokenpool.h"
#include <assert.h>
#include <stdio.h>
@@ -251,11 +252,14 @@ Subprocess *SubprocessSet::Add(const str
return subprocess;
}
-bool SubprocessSet::DoWork() {
+bool SubprocessSet::DoWork(TokenPool* tokens) {
DWORD bytes_read;
Subprocess* subproc;
OVERLAPPED* overlapped;
+ if (tokens)
+ tokens->WaitForTokenAvailability(ioport_);
+
if (!GetQueuedCompletionStatus(ioport_, &bytes_read, (PULONG_PTR)&subproc,
&overlapped, INFINITE)) {
if (GetLastError() != ERROR_BROKEN_PIPE)
@@ -266,6 +270,11 @@ bool SubprocessSet::DoWork() {
// delivered by NotifyInterrupted above.
return true;
+ if (tokens && tokens->TokenIsAvailable((ULONG_PTR)subproc)) {
+ token_available_ = true;
+ return false;
+ }
+
subproc->OnPipeReady();
if (subproc->Done()) {
--- a/src/subprocess.h
+++ b/src/subprocess.h
@@ -76,6 +76,8 @@ struct Subprocess {
friend struct SubprocessSet;
};
+struct TokenPool;
+
/// SubprocessSet runs a ppoll/pselect() loop around a set of Subprocesses.
/// DoWork() waits for any state change in subprocesses; finished_
/// is a queue of subprocesses as they finish.
@@ -84,13 +86,17 @@ struct SubprocessSet {
~SubprocessSet();
Subprocess* Add(const std::string& command, bool use_console = false);
- bool DoWork();
+ bool DoWork(TokenPool* tokens);
Subprocess* NextFinished();
void Clear();
std::vector<Subprocess*> running_;
std::queue<Subprocess*> finished_;
+ bool token_available_;
+ bool IsTokenAvailable() { return token_available_; }
+ void ResetTokenAvailable() { token_available_ = false; }
+
#ifdef _WIN32
static BOOL WINAPI NotifyInterrupted(DWORD dwCtrlType);
static HANDLE ioport_;
--- a/src/subprocess_test.cc
+++ b/src/subprocess_test.cc
@@ -13,6 +13,7 @@
// limitations under the License.
#include "subprocess.h"
+#include "tokenpool.h"
#include "test.h"
@@ -34,8 +35,30 @@ const char* kSimpleCommand = "cmd /c dir
const char* kSimpleCommand = "ls /";
#endif
+struct TestTokenPool : public TokenPool {
+ bool Acquire() { return false; }
+ void Reserve() {}
+ void Release() {}
+ void Clear() {}
+ bool Setup(bool ignore_unused, bool verbose, double& max_load_average) { return false; }
+
+#ifdef _WIN32
+ bool _token_available;
+ void WaitForTokenAvailability(HANDLE ioport) {
+ if (_token_available)
+ // unblock GetQueuedCompletionStatus()
+ PostQueuedCompletionStatus(ioport, 0, (ULONG_PTR) this, NULL);
+ }
+ bool TokenIsAvailable(ULONG_PTR key) { return key == (ULONG_PTR) this; }
+#else
+ int _fd;
+ int GetMonitorFd() { return _fd; }
+#endif
+};
+
struct SubprocessTest : public testing::Test {
SubprocessSet subprocs_;
+ TestTokenPool tokens_;
};
} // anonymous namespace
@@ -45,10 +68,12 @@ TEST_F(SubprocessTest, BadCommandStderr)
Subprocess* subproc = subprocs_.Add("cmd /c ninja_no_such_command");
ASSERT_NE((Subprocess *) 0, subproc);
+ subprocs_.ResetTokenAvailable();
while (!subproc->Done()) {
// Pretend we discovered that stderr was ready for writing.
- subprocs_.DoWork();
+ subprocs_.DoWork(NULL);
}
+ ASSERT_FALSE(subprocs_.IsTokenAvailable());
EXPECT_EQ(ExitFailure, subproc->Finish());
EXPECT_NE("", subproc->GetOutput());
@@ -59,10 +84,12 @@ TEST_F(SubprocessTest, NoSuchCommand) {
Subprocess* subproc = subprocs_.Add("ninja_no_such_command");
ASSERT_NE((Subprocess *) 0, subproc);
+ subprocs_.ResetTokenAvailable();
while (!subproc->Done()) {
// Pretend we discovered that stderr was ready for writing.
- subprocs_.DoWork();
+ subprocs_.DoWork(NULL);
}
+ ASSERT_FALSE(subprocs_.IsTokenAvailable());
EXPECT_EQ(ExitFailure, subproc->Finish());
EXPECT_NE("", subproc->GetOutput());
@@ -78,9 +105,11 @@ TEST_F(SubprocessTest, InterruptChild) {
Subprocess* subproc = subprocs_.Add("kill -INT $$");
ASSERT_NE((Subprocess *) 0, subproc);
+ subprocs_.ResetTokenAvailable();
while (!subproc->Done()) {
- subprocs_.DoWork();
+ subprocs_.DoWork(NULL);
}
+ ASSERT_FALSE(subprocs_.IsTokenAvailable());
EXPECT_EQ(ExitInterrupted, subproc->Finish());
}
@@ -90,7 +119,7 @@ TEST_F(SubprocessTest, InterruptParent)
ASSERT_NE((Subprocess *) 0, subproc);
while (!subproc->Done()) {
- bool interrupted = subprocs_.DoWork();
+ bool interrupted = subprocs_.DoWork(NULL);
if (interrupted)
return;
}
@@ -102,9 +131,11 @@ TEST_F(SubprocessTest, InterruptChildWit
Subprocess* subproc = subprocs_.Add("kill -TERM $$");
ASSERT_NE((Subprocess *) 0, subproc);
+ subprocs_.ResetTokenAvailable();
while (!subproc->Done()) {
- subprocs_.DoWork();
+ subprocs_.DoWork(NULL);
}
+ ASSERT_FALSE(subprocs_.IsTokenAvailable());
EXPECT_EQ(ExitInterrupted, subproc->Finish());
}
@@ -114,7 +145,7 @@ TEST_F(SubprocessTest, InterruptParentWi
ASSERT_NE((Subprocess *) 0, subproc);
while (!subproc->Done()) {
- bool interrupted = subprocs_.DoWork();
+ bool interrupted = subprocs_.DoWork(NULL);
if (interrupted)
return;
}
@@ -126,9 +157,11 @@ TEST_F(SubprocessTest, InterruptChildWit
Subprocess* subproc = subprocs_.Add("kill -HUP $$");
ASSERT_NE((Subprocess *) 0, subproc);
+ subprocs_.ResetTokenAvailable();
while (!subproc->Done()) {
- subprocs_.DoWork();
+ subprocs_.DoWork(NULL);
}
+ ASSERT_FALSE(subprocs_.IsTokenAvailable());
EXPECT_EQ(ExitInterrupted, subproc->Finish());
}
@@ -138,7 +171,7 @@ TEST_F(SubprocessTest, InterruptParentWi
ASSERT_NE((Subprocess *) 0, subproc);
while (!subproc->Done()) {
- bool interrupted = subprocs_.DoWork();
+ bool interrupted = subprocs_.DoWork(NULL);
if (interrupted)
return;
}
@@ -153,9 +186,11 @@ TEST_F(SubprocessTest, Console) {
subprocs_.Add("test -t 0 -a -t 1 -a -t 2", /*use_console=*/true);
ASSERT_NE((Subprocess*)0, subproc);
+ subprocs_.ResetTokenAvailable();
while (!subproc->Done()) {
- subprocs_.DoWork();
+ subprocs_.DoWork(NULL);
}
+ ASSERT_FALSE(subprocs_.IsTokenAvailable());
EXPECT_EQ(ExitSuccess, subproc->Finish());
}
@@ -167,9 +202,11 @@ TEST_F(SubprocessTest, SetWithSingle) {
Subprocess* subproc = subprocs_.Add(kSimpleCommand);
ASSERT_NE((Subprocess *) 0, subproc);
+ subprocs_.ResetTokenAvailable();
while (!subproc->Done()) {
- subprocs_.DoWork();
+ subprocs_.DoWork(NULL);
}
+ ASSERT_FALSE(subprocs_.IsTokenAvailable());
ASSERT_EQ(ExitSuccess, subproc->Finish());
ASSERT_NE("", subproc->GetOutput());
@@ -200,12 +237,13 @@ TEST_F(SubprocessTest, SetWithMulti) {
ASSERT_EQ("", processes[i]->GetOutput());
}
+ subprocs_.ResetTokenAvailable();
while (!processes[0]->Done() || !processes[1]->Done() ||
!processes[2]->Done()) {
ASSERT_GT(subprocs_.running_.size(), 0u);
- subprocs_.DoWork();
+ subprocs_.DoWork(NULL);
}
-
+ ASSERT_FALSE(subprocs_.IsTokenAvailable());
ASSERT_EQ(0u, subprocs_.running_.size());
ASSERT_EQ(3u, subprocs_.finished_.size());
@@ -237,8 +275,10 @@ TEST_F(SubprocessTest, SetWithLots) {
ASSERT_NE((Subprocess *) 0, subproc);
procs.push_back(subproc);
}
+ subprocs_.ResetTokenAvailable();
while (!subprocs_.running_.empty())
- subprocs_.DoWork();
+ subprocs_.DoWork(NULL);
+ ASSERT_FALSE(subprocs_.IsTokenAvailable());
for (size_t i = 0; i < procs.size(); ++i) {
ASSERT_EQ(ExitSuccess, procs[i]->Finish());
ASSERT_NE("", procs[i]->GetOutput());
@@ -254,10 +294,91 @@ TEST_F(SubprocessTest, SetWithLots) {
// that stdin is closed.
TEST_F(SubprocessTest, ReadStdin) {
Subprocess* subproc = subprocs_.Add("cat -");
+ subprocs_.ResetTokenAvailable();
while (!subproc->Done()) {
- subprocs_.DoWork();
+ subprocs_.DoWork(NULL);
}
+ ASSERT_FALSE(subprocs_.IsTokenAvailable());
ASSERT_EQ(ExitSuccess, subproc->Finish());
ASSERT_EQ(1u, subprocs_.finished_.size());
}
#endif // _WIN32
+
+TEST_F(SubprocessTest, TokenAvailable) {
+ Subprocess* subproc = subprocs_.Add(kSimpleCommand);
+ ASSERT_NE((Subprocess *) 0, subproc);
+
+ // simulate GNUmake jobserver pipe with 1 token
+#ifdef _WIN32
+ tokens_._token_available = true;
+#else
+ int fds[2];
+ ASSERT_EQ(0u, pipe(fds));
+ tokens_._fd = fds[0];
+ ASSERT_EQ(1u, write(fds[1], "T", 1));
+#endif
+
+ subprocs_.ResetTokenAvailable();
+ subprocs_.DoWork(&tokens_);
+#ifdef _WIN32
+ tokens_._token_available = false;
+ // we need to loop here as we have no control where the token
+ // I/O completion post ends up in the queue
+ while (!subproc->Done() && !subprocs_.IsTokenAvailable()) {
+ subprocs_.DoWork(&tokens_);
+ }
+#endif
+
+ EXPECT_TRUE(subprocs_.IsTokenAvailable());
+ EXPECT_EQ(0u, subprocs_.finished_.size());
+
+ // remove token to let DoWork() wait for command again
+#ifndef _WIN32
+ char token;
+ ASSERT_EQ(1u, read(fds[0], &token, 1));
+#endif
+
+ while (!subproc->Done()) {
+ subprocs_.DoWork(&tokens_);
+ }
+
+#ifndef _WIN32
+ close(fds[1]);
+ close(fds[0]);
+#endif
+
+ EXPECT_EQ(ExitSuccess, subproc->Finish());
+ EXPECT_NE("", subproc->GetOutput());
+
+ EXPECT_EQ(1u, subprocs_.finished_.size());
+}
+
+TEST_F(SubprocessTest, TokenNotAvailable) {
+ Subprocess* subproc = subprocs_.Add(kSimpleCommand);
+ ASSERT_NE((Subprocess *) 0, subproc);
+
+ // simulate GNUmake jobserver pipe with 0 tokens
+#ifdef _WIN32
+ tokens_._token_available = false;
+#else
+ int fds[2];
+ ASSERT_EQ(0u, pipe(fds));
+ tokens_._fd = fds[0];
+#endif
+
+ subprocs_.ResetTokenAvailable();
+ while (!subproc->Done()) {
+ subprocs_.DoWork(&tokens_);
+ }
+
+#ifndef _WIN32
+ close(fds[1]);
+ close(fds[0]);
+#endif
+
+ EXPECT_FALSE(subprocs_.IsTokenAvailable());
+ EXPECT_EQ(ExitSuccess, subproc->Finish());
+ EXPECT_NE("", subproc->GetOutput());
+
+ EXPECT_EQ(1u, subprocs_.finished_.size());
+}
--- a/src/ninja.cc
+++ b/src/ninja.cc
@@ -1447,6 +1447,7 @@ int ReadFlags(int* argc, char*** argv,
// We want to run N jobs in parallel. For N = 0, INT_MAX
// is close enough to infinite for most sane builds.
config->parallelism = value > 0 ? value : INT_MAX;
+ config->parallelism_from_cmdline = true;
deferGuessParallelism.needGuess = false;
break;
}
--- /dev/null
+++ b/src/tokenpool_test.cc
@@ -0,0 +1,279 @@
+// Copyright 2018 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "tokenpool.h"
+
+#include "test.h"
+
+#ifdef _WIN32
+#include <windows.h>
+#else
+#include <unistd.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#ifdef _WIN32
+// should contain all valid characters
+#define SEMAPHORE_NAME "abcdefghijklmnopqrstwxyz01234567890_"
+#define AUTH_FORMAT(tmpl) "foo " tmpl "=%s bar"
+#define ENVIRONMENT_CLEAR() SetEnvironmentVariable("MAKEFLAGS", NULL)
+#define ENVIRONMENT_INIT(v) SetEnvironmentVariable("MAKEFLAGS", v)
+#else
+#define AUTH_FORMAT(tmpl) "foo " tmpl "=%d,%d bar"
+#define ENVIRONMENT_CLEAR() unsetenv("MAKEFLAGS")
+#define ENVIRONMENT_INIT(v) setenv("MAKEFLAGS", v, true)
+#endif
+
+namespace {
+
+const double kLoadAverageDefault = -1.23456789;
+
+struct TokenPoolTest : public testing::Test {
+ double load_avg_;
+ TokenPool* tokens_;
+ char buf_[1024];
+#ifdef _WIN32
+ const char* semaphore_name_;
+ HANDLE semaphore_;
+#else
+ int fds_[2];
+
+ char random() {
+ return int((rand() / double(RAND_MAX)) * 256);
+ }
+#endif
+
+ virtual void SetUp() {
+ load_avg_ = kLoadAverageDefault;
+ tokens_ = NULL;
+ ENVIRONMENT_CLEAR();
+#ifdef _WIN32
+ semaphore_name_ = SEMAPHORE_NAME;
+ if ((semaphore_ = CreateSemaphore(0, 0, 2, SEMAPHORE_NAME)) == NULL)
+#else
+ if (pipe(fds_) < 0)
+#endif
+ ASSERT_TRUE(false);
+ }
+
+ void CreatePool(const char* format, bool ignore_jobserver = false) {
+ if (format) {
+ sprintf(buf_, format,
+#ifdef _WIN32
+ semaphore_name_
+#else
+ fds_[0], fds_[1]
+#endif
+ );
+ ENVIRONMENT_INIT(buf_);
+ }
+ if ((tokens_ = TokenPool::Get()) != NULL) {
+ if (!tokens_->Setup(ignore_jobserver, false, load_avg_)) {
+ delete tokens_;
+ tokens_ = NULL;
+ }
+ }
+ }
+
+ void CreateDefaultPool() {
+ CreatePool(AUTH_FORMAT("--jobserver-auth"));
+ }
+
+ virtual void TearDown() {
+ if (tokens_)
+ delete tokens_;
+#ifdef _WIN32
+ CloseHandle(semaphore_);
+#else
+ close(fds_[0]);
+ close(fds_[1]);
+#endif
+ ENVIRONMENT_CLEAR();
+ }
+};
+
+} // anonymous namespace
+
+// verifies none implementation
+TEST_F(TokenPoolTest, NoTokenPool) {
+ CreatePool(NULL, false);
+
+ EXPECT_EQ(NULL, tokens_);
+ EXPECT_EQ(kLoadAverageDefault, load_avg_);
+}
+
+TEST_F(TokenPoolTest, SuccessfulOldSetup) {
+ // GNUmake <= 4.1
+ CreatePool(AUTH_FORMAT("--jobserver-fds"));
+
+ EXPECT_NE(NULL, tokens_);
+ EXPECT_EQ(kLoadAverageDefault, load_avg_);
+}
+
+TEST_F(TokenPoolTest, SuccessfulNewSetup) {
+ // GNUmake => 4.2
+ CreateDefaultPool();
+
+ EXPECT_NE(NULL, tokens_);
+ EXPECT_EQ(kLoadAverageDefault, load_avg_);
+}
+
+TEST_F(TokenPoolTest, IgnoreWithJN) {
+ CreatePool(AUTH_FORMAT("--jobserver-auth"), true);
+
+ EXPECT_EQ(NULL, tokens_);
+ EXPECT_EQ(kLoadAverageDefault, load_avg_);
+}
+
+TEST_F(TokenPoolTest, HonorLN) {
+ CreatePool(AUTH_FORMAT("-l9 --jobserver-auth"));
+
+ EXPECT_NE(NULL, tokens_);
+ EXPECT_EQ(9.0, load_avg_);
+}
+
+#ifdef _WIN32
+TEST_F(TokenPoolTest, SemaphoreNotFound) {
+ semaphore_name_ = SEMAPHORE_NAME "_foobar";
+ CreateDefaultPool();
+
+ EXPECT_EQ(NULL, tokens_);
+ EXPECT_EQ(kLoadAverageDefault, load_avg_);
+}
+
+TEST_F(TokenPoolTest, TokenIsAvailable) {
+ CreateDefaultPool();
+
+ ASSERT_NE(NULL, tokens_);
+ EXPECT_EQ(kLoadAverageDefault, load_avg_);
+
+ EXPECT_TRUE(tokens_->TokenIsAvailable((ULONG_PTR)tokens_));
+}
+#else
+TEST_F(TokenPoolTest, MonitorFD) {
+ CreateDefaultPool();
+
+ ASSERT_NE(NULL, tokens_);
+ EXPECT_EQ(kLoadAverageDefault, load_avg_);
+
+ EXPECT_EQ(fds_[0], tokens_->GetMonitorFd());
+}
+#endif
+
+TEST_F(TokenPoolTest, ImplicitToken) {
+ CreateDefaultPool();
+
+ ASSERT_NE(NULL, tokens_);
+ EXPECT_EQ(kLoadAverageDefault, load_avg_);
+
+ EXPECT_TRUE(tokens_->Acquire());
+ tokens_->Reserve();
+ EXPECT_FALSE(tokens_->Acquire());
+ tokens_->Release();
+ EXPECT_TRUE(tokens_->Acquire());
+}
+
+TEST_F(TokenPoolTest, TwoTokens) {
+ CreateDefaultPool();
+
+ ASSERT_NE(NULL, tokens_);
+ EXPECT_EQ(kLoadAverageDefault, load_avg_);
+
+ // implicit token
+ EXPECT_TRUE(tokens_->Acquire());
+ tokens_->Reserve();
+ EXPECT_FALSE(tokens_->Acquire());
+
+ // jobserver offers 2nd token
+#ifdef _WIN32
+ LONG previous;
+ ASSERT_TRUE(ReleaseSemaphore(semaphore_, 1, &previous));
+ ASSERT_EQ(0, previous);
+#else
+ char test_tokens[1] = { random() };
+ ASSERT_EQ(1u, write(fds_[1], test_tokens, sizeof(test_tokens)));
+#endif
+ EXPECT_TRUE(tokens_->Acquire());
+ tokens_->Reserve();
+ EXPECT_FALSE(tokens_->Acquire());
+
+ // release 2nd token
+ tokens_->Release();
+ EXPECT_TRUE(tokens_->Acquire());
+
+ // release implicit token - must return 2nd token back to jobserver
+ tokens_->Release();
+ EXPECT_TRUE(tokens_->Acquire());
+
+ // there must be one token available
+#ifdef _WIN32
+ EXPECT_EQ(WAIT_OBJECT_0, WaitForSingleObject(semaphore_, 0));
+ EXPECT_TRUE(ReleaseSemaphore(semaphore_, 1, &previous));
+ EXPECT_EQ(0, previous);
+#else
+ EXPECT_EQ(1u, read(fds_[0], buf_, sizeof(buf_)));
+ EXPECT_EQ(test_tokens[0], buf_[0]);
+#endif
+
+ // implicit token
+ EXPECT_TRUE(tokens_->Acquire());
+}
+
+TEST_F(TokenPoolTest, Clear) {
+ CreateDefaultPool();
+
+ ASSERT_NE(NULL, tokens_);
+ EXPECT_EQ(kLoadAverageDefault, load_avg_);
+
+ // implicit token
+ EXPECT_TRUE(tokens_->Acquire());
+ tokens_->Reserve();
+ EXPECT_FALSE(tokens_->Acquire());
+
+ // jobserver offers 2nd & 3rd token
+#ifdef _WIN32
+ LONG previous;
+ ASSERT_TRUE(ReleaseSemaphore(semaphore_, 2, &previous));
+ ASSERT_EQ(0, previous);
+#else
+ char test_tokens[2] = { random(), random() };
+ ASSERT_EQ(2u, write(fds_[1], test_tokens, sizeof(test_tokens)));
+#endif
+ EXPECT_TRUE(tokens_->Acquire());
+ tokens_->Reserve();
+ EXPECT_TRUE(tokens_->Acquire());
+ tokens_->Reserve();
+ EXPECT_FALSE(tokens_->Acquire());
+
+ tokens_->Clear();
+ EXPECT_TRUE(tokens_->Acquire());
+
+ // there must be two tokens available
+#ifdef _WIN32
+ EXPECT_EQ(WAIT_OBJECT_0, WaitForSingleObject(semaphore_, 0));
+ EXPECT_EQ(WAIT_OBJECT_0, WaitForSingleObject(semaphore_, 0));
+ EXPECT_TRUE(ReleaseSemaphore(semaphore_, 2, &previous));
+ EXPECT_EQ(0, previous);
+#else
+ EXPECT_EQ(2u, read(fds_[0], buf_, sizeof(buf_)));
+ // tokens are pushed onto a stack, hence returned in reverse order
+ EXPECT_EQ(test_tokens[0], buf_[1]);
+ EXPECT_EQ(test_tokens[1], buf_[0]);
+#endif
+
+ // implicit token
+ EXPECT_TRUE(tokens_->Acquire());
+}
--- /dev/null
+++ b/src/tokenpool-gnu-make-posix.cc
@@ -0,0 +1,214 @@
+// Copyright 2016-2018 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "tokenpool-gnu-make.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <poll.h>
+#include <unistd.h>
+#include <signal.h>
+#include <sys/time.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stack>
+
+// TokenPool implementation for GNU make jobserver - POSIX implementation
+// (http://make.mad-scientist.net/papers/jobserver-implementation/)
+struct GNUmakeTokenPoolPosix : public GNUmakeTokenPool {
+ GNUmakeTokenPoolPosix();
+ virtual ~GNUmakeTokenPoolPosix();
+
+ virtual int GetMonitorFd();
+
+ virtual const char* GetEnv(const char* name) { return getenv(name); };
+ virtual bool ParseAuth(const char* jobserver);
+ virtual bool AcquireToken();
+ virtual bool ReturnToken();
+
+ private:
+ int rfd_;
+ int wfd_;
+
+ struct sigaction old_act_;
+ bool restore_;
+
+ // See https://www.gnu.org/software/make/manual/html_node/POSIX-Jobserver.html
+ //
+ // It’s important that when you release the job slot, you write back
+ // the same character you read. Don’t assume that all tokens are the
+ // same character different characters may have different meanings to
+ // GNU make. The order is not important, since make has no idea in
+ // what order jobs will complete anyway.
+ //
+ std::stack<char> tokens_;
+
+ static int dup_rfd_;
+ static void CloseDupRfd(int signum);
+
+ bool CheckFd(int fd);
+ bool SetAlarmHandler();
+};
+
+GNUmakeTokenPoolPosix::GNUmakeTokenPoolPosix() : rfd_(-1), wfd_(-1), restore_(false) {
+}
+
+GNUmakeTokenPoolPosix::~GNUmakeTokenPoolPosix() {
+ Clear();
+ if (restore_)
+ sigaction(SIGALRM, &old_act_, NULL);
+}
+
+bool GNUmakeTokenPoolPosix::CheckFd(int fd) {
+ if (fd < 0)
+ return false;
+ int ret = fcntl(fd, F_GETFD);
+ return ret >= 0;
+}
+
+int GNUmakeTokenPoolPosix::dup_rfd_ = -1;
+
+void GNUmakeTokenPoolPosix::CloseDupRfd(int signum) {
+ close(dup_rfd_);
+ dup_rfd_ = -1;
+}
+
+bool GNUmakeTokenPoolPosix::SetAlarmHandler() {
+ struct sigaction act;
+ memset(&act, 0, sizeof(act));
+ act.sa_handler = CloseDupRfd;
+ if (sigaction(SIGALRM, &act, &old_act_) < 0) {
+ perror("sigaction:");
+ return false;
+ }
+ restore_ = true;
+ return true;
+}
+
+bool GNUmakeTokenPoolPosix::ParseAuth(const char* jobserver) {
+ int rfd = -1;
+ int wfd = -1;
+ if ((sscanf(jobserver, "%*[^=]=%d,%d", &rfd, &wfd) == 2) &&
+ CheckFd(rfd) &&
+ CheckFd(wfd) &&
+ SetAlarmHandler()) {
+ rfd_ = rfd;
+ wfd_ = wfd;
+ return true;
+ }
+
+ return false;
+}
+
+bool GNUmakeTokenPoolPosix::AcquireToken() {
+ // Please read
+ //
+ // http://make.mad-scientist.net/papers/jobserver-implementation/
+ //
+ // for the reasoning behind the following code.
+ //
+ // Try to read one character from the pipe. Returns true on success.
+ //
+ // First check if read() would succeed without blocking.
+#ifdef USE_PPOLL
+ pollfd pollfds[] = {{rfd_, POLLIN, 0}};
+ int ret = poll(pollfds, 1, 0);
+#else
+ fd_set set;
+ struct timeval timeout = { 0, 0 };
+ FD_ZERO(&set);
+ FD_SET(rfd_, &set);
+ int ret = select(rfd_ + 1, &set, NULL, NULL, &timeout);
+#endif
+ if (ret > 0) {
+ // Handle potential race condition:
+ // - the above check succeeded, i.e. read() should not block
+ // - the character disappears before we call read()
+ //
+ // Create a duplicate of rfd_. The duplicate file descriptor dup_rfd_
+ // can safely be closed by signal handlers without affecting rfd_.
+ dup_rfd_ = dup(rfd_);
+
+ if (dup_rfd_ != -1) {
+ struct sigaction act, old_act;
+ int ret = 0;
+ char buf;
+
+ // Temporarily replace SIGCHLD handler with our own
+ memset(&act, 0, sizeof(act));
+ act.sa_handler = CloseDupRfd;
+ if (sigaction(SIGCHLD, &act, &old_act) == 0) {
+ struct itimerval timeout;
+
+ // install a 100ms timeout that generates SIGALARM on expiration
+ memset(&timeout, 0, sizeof(timeout));
+ timeout.it_value.tv_usec = 100 * 1000; // [ms] -> [usec]
+ if (setitimer(ITIMER_REAL, &timeout, NULL) == 0) {
+ // Now try to read() from dup_rfd_. Return values from read():
+ //
+ // 1. token read -> 1
+ // 2. pipe closed -> 0
+ // 3. alarm expires -> -1 (EINTR)
+ // 4. child exits -> -1 (EINTR)
+ // 5. alarm expired before entering read() -> -1 (EBADF)
+ // 6. child exited before entering read() -> -1 (EBADF)
+ // 7. child exited before handler is installed -> go to 1 - 3
+ ret = read(dup_rfd_, &buf, 1);
+
+ // disarm timer
+ memset(&timeout, 0, sizeof(timeout));
+ setitimer(ITIMER_REAL, &timeout, NULL);
+ }
+
+ sigaction(SIGCHLD, &old_act, NULL);
+ }
+
+ CloseDupRfd(0);
+
+ // Case 1 from above list
+ if (ret > 0) {
+ tokens_.push(buf);
+ return true;
+ }
+ }
+ }
+
+ // read() would block, i.e. no token available,
+ // cases 2-6 from above list or
+ // select() / poll() / dup() / sigaction() / setitimer() failed
+ return false;
+}
+
+bool GNUmakeTokenPoolPosix::ReturnToken() {
+ const char buf = tokens_.top();
+ while (1) {
+ int ret = write(wfd_, &buf, 1);
+ if (ret > 0) {
+ tokens_.pop();
+ return true;
+ }
+ if ((ret != -1) || (errno != EINTR))
+ return false;
+ // write got interrupted - retry
+ }
+}
+
+int GNUmakeTokenPoolPosix::GetMonitorFd() {
+ return rfd_;
+}
+
+TokenPool* TokenPool::Get() {
+ return new GNUmakeTokenPoolPosix;
+}
--- /dev/null
+++ b/src/tokenpool-gnu-make-win32.cc
@@ -0,0 +1,239 @@
+// Copyright 2018 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "tokenpool-gnu-make.h"
+
+// Always include this first.
+// Otherwise the other system headers don't work correctly under Win32
+#include <windows.h>
+
+#include <ctype.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "util.h"
+
+// TokenPool implementation for GNU make jobserver - Win32 implementation
+// (https://www.gnu.org/software/make/manual/html_node/Windows-Jobserver.html)
+struct GNUmakeTokenPoolWin32 : public GNUmakeTokenPool {
+ GNUmakeTokenPoolWin32();
+ virtual ~GNUmakeTokenPoolWin32();
+
+ virtual void WaitForTokenAvailability(HANDLE ioport);
+ virtual bool TokenIsAvailable(ULONG_PTR key);
+
+ virtual const char* GetEnv(const char* name);
+ virtual bool ParseAuth(const char* jobserver);
+ virtual bool AcquireToken();
+ virtual bool ReturnToken();
+
+ private:
+ // Semaphore for GNU make jobserver protocol
+ HANDLE semaphore_jobserver_;
+ // Semaphore Child -> Parent
+ // - child releases it before entering wait on jobserver semaphore
+ // - parent blocks on it to know when child enters wait
+ HANDLE semaphore_enter_wait_;
+ // Semaphore Parent -> Child
+ // - parent releases it to allow child to restart loop
+ // - child blocks on it to know when to restart loop
+ HANDLE semaphore_restart_;
+ // set to false if child should exit loop and terminate thread
+ bool running_;
+ // child thread
+ HANDLE child_;
+ // I/O completion port from SubprocessSet
+ HANDLE ioport_;
+
+
+ DWORD SemaphoreThread();
+ void ReleaseSemaphore(HANDLE semaphore);
+ void WaitForObject(HANDLE object);
+ static DWORD WINAPI SemaphoreThreadWrapper(LPVOID param);
+ static void NoopAPCFunc(ULONG_PTR param);
+};
+
+GNUmakeTokenPoolWin32::GNUmakeTokenPoolWin32() : semaphore_jobserver_(NULL),
+ semaphore_enter_wait_(NULL),
+ semaphore_restart_(NULL),
+ running_(false),
+ child_(NULL),
+ ioport_(NULL) {
+}
+
+GNUmakeTokenPoolWin32::~GNUmakeTokenPoolWin32() {
+ Clear();
+ CloseHandle(semaphore_jobserver_);
+ semaphore_jobserver_ = NULL;
+
+ if (child_) {
+ // tell child thread to exit
+ running_ = false;
+ ReleaseSemaphore(semaphore_restart_);
+
+ // wait for child thread to exit
+ WaitForObject(child_);
+ CloseHandle(child_);
+ child_ = NULL;
+ }
+
+ if (semaphore_restart_) {
+ CloseHandle(semaphore_restart_);
+ semaphore_restart_ = NULL;
+ }
+
+ if (semaphore_enter_wait_) {
+ CloseHandle(semaphore_enter_wait_);
+ semaphore_enter_wait_ = NULL;
+ }
+}
+
+const char* GNUmakeTokenPoolWin32::GetEnv(const char* name) {
+ // getenv() does not work correctly together with tokenpool_tests.cc
+ static char buffer[MAX_PATH + 1];
+ if (GetEnvironmentVariable(name, buffer, sizeof(buffer)) == 0)
+ return NULL;
+ return buffer;
+}
+
+bool GNUmakeTokenPoolWin32::ParseAuth(const char* jobserver) {
+ // match "--jobserver-auth=gmake_semaphore_<INTEGER>..."
+ const char* start = strchr(jobserver, '=');
+ if (start) {
+ const char* end = start;
+ unsigned int len;
+ char c, *auth;
+
+ while ((c = *++end) != '\0')
+ if (!(isalnum(c) || (c == '_')))
+ break;
+ len = end - start; // includes string terminator in count
+
+ if ((len > 1) && ((auth = (char*)malloc(len)) != NULL)) {
+ strncpy(auth, start + 1, len - 1);
+ auth[len - 1] = '\0';
+
+ if ((semaphore_jobserver_ =
+ OpenSemaphore(SEMAPHORE_ALL_ACCESS, /* Semaphore access setting */
+ FALSE, /* Child processes DON'T inherit */
+ auth /* Semaphore name */
+ )) != NULL) {
+ free(auth);
+ return true;
+ }
+
+ free(auth);
+ }
+ }
+
+ return false;
+}
+
+bool GNUmakeTokenPoolWin32::AcquireToken() {
+ return WaitForSingleObject(semaphore_jobserver_, 0) == WAIT_OBJECT_0;
+}
+
+bool GNUmakeTokenPoolWin32::ReturnToken() {
+ ReleaseSemaphore(semaphore_jobserver_);
+ return true;
+}
+
+DWORD GNUmakeTokenPoolWin32::SemaphoreThread() {
+ while (running_) {
+ // indicate to parent that we are entering wait
+ ReleaseSemaphore(semaphore_enter_wait_);
+
+ // alertable wait forever on token semaphore
+ if (WaitForSingleObjectEx(semaphore_jobserver_, INFINITE, TRUE) == WAIT_OBJECT_0) {
+ // release token again for AcquireToken()
+ ReleaseSemaphore(semaphore_jobserver_);
+
+ // indicate to parent on ioport that a token might be available
+ if (!PostQueuedCompletionStatus(ioport_, 0, (ULONG_PTR) this, NULL))
+ Win32Fatal("PostQueuedCompletionStatus");
+ }
+
+ // wait for parent to allow loop restart
+ WaitForObject(semaphore_restart_);
+ // semaphore is now in nonsignaled state again for next run...
+ }
+
+ return 0;
+}
+
+DWORD WINAPI GNUmakeTokenPoolWin32::SemaphoreThreadWrapper(LPVOID param) {
+ GNUmakeTokenPoolWin32* This = (GNUmakeTokenPoolWin32*) param;
+ return This->SemaphoreThread();
+}
+
+void GNUmakeTokenPoolWin32::NoopAPCFunc(ULONG_PTR param) {
+}
+
+void GNUmakeTokenPoolWin32::WaitForTokenAvailability(HANDLE ioport) {
+ if (child_ == NULL) {
+ // first invocation
+ //
+ // subprocess-win32.cc uses I/O completion port (IOCP) which can't be
+ // used as a waitable object. Therefore we can't use WaitMultipleObjects()
+ // to wait on the IOCP and the token semaphore at the same time. Create
+ // a child thread that waits on the semaphore and posts an I/O completion
+ ioport_ = ioport;
+
+ // create both semaphores in nonsignaled state
+ if ((semaphore_enter_wait_ = CreateSemaphore(NULL, 0, 1, NULL))
+ == NULL)
+ Win32Fatal("CreateSemaphore/enter_wait");
+ if ((semaphore_restart_ = CreateSemaphore(NULL, 0, 1, NULL))
+ == NULL)
+ Win32Fatal("CreateSemaphore/restart");
+
+ // start child thread
+ running_ = true;
+ if ((child_ = CreateThread(NULL, 0, &SemaphoreThreadWrapper, this, 0, NULL))
+ == NULL)
+ Win32Fatal("CreateThread");
+
+ } else {
+ // all further invocations - allow child thread to loop
+ ReleaseSemaphore(semaphore_restart_);
+ }
+
+ // wait for child thread to enter wait
+ WaitForObject(semaphore_enter_wait_);
+ // semaphore is now in nonsignaled state again for next run...
+
+ // now SubprocessSet::DoWork() can enter GetQueuedCompletionStatus()...
+}
+
+bool GNUmakeTokenPoolWin32::TokenIsAvailable(ULONG_PTR key) {
+ // alert child thread to break wait on token semaphore
+ QueueUserAPC((PAPCFUNC)&NoopAPCFunc, child_, (ULONG_PTR)NULL);
+
+ // return true when GetQueuedCompletionStatus() returned our key
+ return key == (ULONG_PTR) this;
+}
+
+void GNUmakeTokenPoolWin32::ReleaseSemaphore(HANDLE semaphore) {
+ if (!::ReleaseSemaphore(semaphore, 1, NULL))
+ Win32Fatal("ReleaseSemaphore");
+}
+
+void GNUmakeTokenPoolWin32::WaitForObject(HANDLE object) {
+ if (WaitForSingleObject(object, INFINITE) != WAIT_OBJECT_0)
+ Win32Fatal("WaitForSingleObject");
+}
+
+TokenPool* TokenPool::Get() {
+ return new GNUmakeTokenPoolWin32;
+}
--- /dev/null
+++ b/src/tokenpool-gnu-make.h
@@ -0,0 +1,40 @@
+// Copyright 2016-2018 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "tokenpool.h"
+
+// interface to GNU make token pool
+struct GNUmakeTokenPool : public TokenPool {
+ GNUmakeTokenPool();
+ ~GNUmakeTokenPool();
+
+ // token pool implementation
+ virtual bool Acquire();
+ virtual void Reserve();
+ virtual void Release();
+ virtual void Clear();
+ virtual bool Setup(bool ignore, bool verbose, double& max_load_average);
+
+ // platform specific implementation
+ virtual const char* GetEnv(const char* name) = 0;
+ virtual bool ParseAuth(const char* jobserver) = 0;
+ virtual bool AcquireToken() = 0;
+ virtual bool ReturnToken() = 0;
+
+ private:
+ int available_;
+ int used_;
+
+ void Return();
+};
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -112,6 +112,7 @@ add_library(libninja OBJECT
src/state.cc
src/status.cc
src/string_piece_util.cc
+ src/tokenpool-gnu-make.cc
src/util.cc
src/version.cc
)
@@ -123,9 +124,14 @@ if(WIN32)
src/msvc_helper_main-win32.cc
src/getopt.c
src/minidump-win32.cc
+ src/tokenpool-gnu-make-win32.cc
)
else()
target_sources(libninja PRIVATE src/subprocess-posix.cc)
+ target_sources(libninja PRIVATE
+ src/subprocess-posix.cc
+ src/tokenpool-gnu-make-posix.cc
+ )
if(CMAKE_SYSTEM_NAME STREQUAL "OS400" OR CMAKE_SYSTEM_NAME STREQUAL "AIX")
target_sources(libninja PRIVATE src/getopt.c)
endif()
@@ -204,6 +210,7 @@ if(BUILD_TESTING)
src/string_piece_util_test.cc
src/subprocess_test.cc
src/test.cc
+ src/tokenpool_test.cc
src/util_test.cc
)
if(WIN32)
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