mirror of https://github.com/mpv-player/mpv
252 lines
8.0 KiB
C
252 lines
8.0 KiB
C
/*
|
|
* This file is part of mpv.
|
|
*
|
|
* mpv is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* mpv is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <errno.h>
|
|
#include <pthread.h>
|
|
#include <stdio.h>
|
|
|
|
#include "common/common.h"
|
|
#include "config.h"
|
|
// We make use of NON-POSIX pthreads functions and certain systems
|
|
// require this header to build without issues. (ex: OpenBSD)
|
|
#if HAVE_BSD_THREAD_NAME
|
|
#include <pthread_np.h>
|
|
#endif
|
|
#include "osdep/compiler.h"
|
|
#include "timer.h"
|
|
|
|
int mp_ptwrap_check(const char *file, int line, int res);
|
|
int mp_ptwrap_mutex_init(const char *file, int line, pthread_mutex_t *m,
|
|
const pthread_mutexattr_t *attr);
|
|
int mp_ptwrap_mutex_trylock(const char *file, int line, pthread_mutex_t *m);
|
|
|
|
#if HAVE_PTHREAD_DEBUG
|
|
|
|
// pthread debugging wrappers. Technically, this is undefined behavior, because
|
|
// you are not supposed to define any symbols that clash with reserved names.
|
|
// Other than that, they should be fine.
|
|
|
|
// Note: mpv normally never checks pthread error return values of certain
|
|
// functions that should never fail. It does so because these cases would
|
|
// be undefined behavior anyway (such as double-frees etc.). However,
|
|
// since there are no good pthread debugging tools, these wrappers are
|
|
// provided for the sake of debugging. They crash on unexpected errors.
|
|
//
|
|
// Technically, pthread_cond/mutex_init() can fail with ENOMEM. We don't
|
|
// really respect this for normal/recursive mutex types, as due to the
|
|
// existence of static initializers, no sane implementation could actually
|
|
// require allocating memory.
|
|
|
|
#define MP_PTWRAP(fn, ...) \
|
|
mp_ptwrap_check(__FILE__, __LINE__, (fn)(__VA_ARGS__))
|
|
|
|
// ISO C defines that all standard functions can be macros, except undef'ing
|
|
// them is allowed and must make the "real" definitions available. (Whatever.)
|
|
#undef pthread_cond_init
|
|
#undef pthread_cond_destroy
|
|
#undef pthread_cond_broadcast
|
|
#undef pthread_cond_signal
|
|
#undef pthread_cond_wait
|
|
#undef pthread_cond_timedwait
|
|
#undef pthread_detach
|
|
#undef pthread_join
|
|
#undef pthread_mutex_destroy
|
|
#undef pthread_mutex_lock
|
|
#undef pthread_mutex_trylock
|
|
#undef pthread_mutex_unlock
|
|
|
|
#define pthread_cond_init(...) MP_PTWRAP(pthread_cond_init, __VA_ARGS__)
|
|
#define pthread_cond_destroy(...) MP_PTWRAP(pthread_cond_destroy, __VA_ARGS__)
|
|
#define pthread_cond_broadcast(...) MP_PTWRAP(pthread_cond_broadcast, __VA_ARGS__)
|
|
#define pthread_cond_signal(...) MP_PTWRAP(pthread_cond_signal, __VA_ARGS__)
|
|
#define pthread_cond_wait(...) MP_PTWRAP(pthread_cond_wait, __VA_ARGS__)
|
|
#define pthread_cond_timedwait(...) MP_PTWRAP(pthread_cond_timedwait, __VA_ARGS__)
|
|
#define pthread_detach(...) MP_PTWRAP(pthread_detach, __VA_ARGS__)
|
|
#define pthread_join(...) MP_PTWRAP(pthread_join, __VA_ARGS__)
|
|
#define pthread_mutex_destroy(...) MP_PTWRAP(pthread_mutex_destroy, __VA_ARGS__)
|
|
#define pthread_mutex_lock(...) MP_PTWRAP(pthread_mutex_lock, __VA_ARGS__)
|
|
#define pthread_mutex_unlock(...) MP_PTWRAP(pthread_mutex_unlock, __VA_ARGS__)
|
|
|
|
#define pthread_mutex_init(...) \
|
|
mp_ptwrap_mutex_init(__FILE__, __LINE__, __VA_ARGS__)
|
|
|
|
#define pthread_mutex_trylock(...) \
|
|
mp_ptwrap_mutex_trylock(__FILE__, __LINE__, __VA_ARGS__)
|
|
|
|
#endif
|
|
|
|
typedef struct {
|
|
pthread_cond_t cond;
|
|
clockid_t clk_id;
|
|
} mp_cond;
|
|
|
|
typedef pthread_mutex_t mp_mutex;
|
|
typedef pthread_mutex_t mp_static_mutex;
|
|
typedef pthread_once_t mp_once;
|
|
typedef pthread_t mp_thread_id;
|
|
typedef pthread_t mp_thread;
|
|
|
|
#define MP_STATIC_COND_INITIALIZER { .cond = PTHREAD_COND_INITIALIZER, .clk_id = CLOCK_REALTIME }
|
|
#define MP_STATIC_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER
|
|
#define MP_STATIC_ONCE_INITIALIZER PTHREAD_ONCE_INIT
|
|
|
|
static inline int mp_mutex_init_type_internal(mp_mutex *mutex, enum mp_mutex_type mtype)
|
|
{
|
|
int mutex_type;
|
|
switch (mtype) {
|
|
case MP_MUTEX_RECURSIVE:
|
|
mutex_type = PTHREAD_MUTEX_RECURSIVE;
|
|
break;
|
|
case MP_MUTEX_NORMAL:
|
|
default:
|
|
#ifndef NDEBUG
|
|
mutex_type = PTHREAD_MUTEX_ERRORCHECK;
|
|
#else
|
|
mutex_type = PTHREAD_MUTEX_DEFAULT;
|
|
#endif
|
|
break;
|
|
}
|
|
|
|
int ret = 0;
|
|
pthread_mutexattr_t attr;
|
|
ret = pthread_mutexattr_init(&attr);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
pthread_mutexattr_settype(&attr, mutex_type);
|
|
ret = pthread_mutex_init(mutex, &attr);
|
|
pthread_mutexattr_destroy(&attr);
|
|
assert(!ret);
|
|
return ret;
|
|
}
|
|
|
|
#define mp_mutex_destroy pthread_mutex_destroy
|
|
#define mp_mutex_lock pthread_mutex_lock
|
|
#define mp_mutex_trylock pthread_mutex_trylock
|
|
#define mp_mutex_unlock pthread_mutex_unlock
|
|
|
|
static inline int mp_cond_init(mp_cond *cond)
|
|
{
|
|
assert(cond);
|
|
|
|
int ret = 0;
|
|
pthread_condattr_t attr;
|
|
ret = pthread_condattr_init(&attr);
|
|
if (ret)
|
|
return ret;
|
|
|
|
cond->clk_id = CLOCK_REALTIME;
|
|
#if HAVE_PTHREAD_CONDATTR_SETCLOCK
|
|
if (!pthread_condattr_setclock(&attr, CLOCK_MONOTONIC))
|
|
cond->clk_id = CLOCK_MONOTONIC;
|
|
#endif
|
|
|
|
ret = pthread_cond_init(&cond->cond, &attr);
|
|
pthread_condattr_destroy(&attr);
|
|
return ret;
|
|
}
|
|
|
|
static inline int mp_cond_destroy(mp_cond *cond)
|
|
{
|
|
assert(cond);
|
|
return pthread_cond_destroy(&cond->cond);
|
|
}
|
|
|
|
static inline int mp_cond_broadcast(mp_cond *cond)
|
|
{
|
|
assert(cond);
|
|
return pthread_cond_broadcast(&cond->cond);
|
|
}
|
|
|
|
static inline int mp_cond_signal(mp_cond *cond)
|
|
{
|
|
assert(cond);
|
|
return pthread_cond_signal(&cond->cond);
|
|
}
|
|
|
|
static inline int mp_cond_wait(mp_cond *cond, mp_mutex *mutex)
|
|
{
|
|
assert(cond);
|
|
return pthread_cond_wait(&cond->cond, mutex);
|
|
}
|
|
|
|
static inline int mp_cond_timedwait(mp_cond *cond, mp_mutex *mutex, int64_t timeout)
|
|
{
|
|
assert(cond);
|
|
|
|
timeout = MPMAX(0, timeout);
|
|
// consider anything above 1000 days as infinity
|
|
if (timeout > MP_TIME_S_TO_NS(1000 * 24 * 60 * 60))
|
|
return pthread_cond_wait(&cond->cond, mutex);
|
|
|
|
struct timespec ts;
|
|
clock_gettime(cond->clk_id, &ts);
|
|
ts.tv_sec += timeout / MP_TIME_S_TO_NS(1);
|
|
ts.tv_nsec += timeout % MP_TIME_S_TO_NS(1);
|
|
if (ts.tv_nsec >= MP_TIME_S_TO_NS(1)) {
|
|
ts.tv_nsec -= MP_TIME_S_TO_NS(1);
|
|
ts.tv_sec++;
|
|
}
|
|
|
|
return pthread_cond_timedwait(&cond->cond, mutex, &ts);
|
|
}
|
|
|
|
static inline int mp_cond_timedwait_until(mp_cond *cond, mp_mutex *mutex, int64_t until)
|
|
{
|
|
return mp_cond_timedwait(cond, mutex, until - mp_time_ns());
|
|
}
|
|
|
|
#define mp_exec_once pthread_once
|
|
|
|
#define MP_THREAD_VOID void *
|
|
#define MP_THREAD_RETURN() return NULL
|
|
|
|
#define mp_thread_create(t, f, a) pthread_create(t, NULL, f, a)
|
|
#define mp_thread_join(t) pthread_join(t, NULL)
|
|
#define mp_thread_detach pthread_detach
|
|
#define mp_thread_current_id pthread_self
|
|
#define mp_thread_id_equal(a, b) ((a) == (b))
|
|
#define mp_thread_get_id(thread) (thread)
|
|
|
|
static inline void mp_thread_set_name(const char *name)
|
|
{
|
|
#if HAVE_GLIBC_THREAD_NAME
|
|
if (pthread_setname_np(pthread_self(), name) == ERANGE) {
|
|
char tname[16] = {0}; // glibc-checked kernel limit
|
|
strncpy(tname, name, sizeof(tname) - 1);
|
|
pthread_setname_np(pthread_self(), tname);
|
|
}
|
|
#elif HAVE_BSD_THREAD_NAME
|
|
pthread_set_name_np(pthread_self(), name);
|
|
#elif HAVE_MAC_THREAD_NAME
|
|
pthread_setname_np(name);
|
|
#endif
|
|
}
|
|
|
|
static inline int64_t mp_thread_cpu_time_ns(mp_thread_id thread)
|
|
{
|
|
#if defined(_POSIX_TIMERS) && _POSIX_TIMERS > 0 && defined(_POSIX_THREAD_CPUTIME)
|
|
clockid_t id;
|
|
struct timespec ts;
|
|
if (pthread_getcpuclockid(thread, &id) == 0 && clock_gettime(id, &ts) == 0)
|
|
return MP_TIME_S_TO_NS(ts.tv_sec) + ts.tv_nsec;
|
|
#endif
|
|
return 0;
|
|
}
|