mirror of
https://github.com/mpv-player/mpv
synced 2024-12-29 18:42:09 +00:00
600221e723
It turns out the glibc people are very clever and return an error if the thread name exceeds the maximum supported kernel length, instead of truncating the name. So everyone has to hardcode the currently allowed Linux kernel name length limit, even if it gets extended later. Also the Lua script filenames could get too long; use the client name instead. Another strange thing is that on Linux, unrelated threads "inherit" the name by the thread they were created. This leads to random thread names, because there's not necessarily a strong relation between these threads (e.g. script command leads to filter recreation -> the filter's threads are tagged with the script's thread name). Unfortunate.
198 lines
5.3 KiB
C
198 lines
5.3 KiB
C
/*
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* This file is part of mpv.
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*
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* mpv is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* mpv is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <string.h>
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#include <strings.h>
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#include <sys/types.h>
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#include <dirent.h>
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#include <math.h>
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#include <pthread.h>
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#include <assert.h>
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#include "config.h"
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#include "osdep/io.h"
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#include "osdep/threads.h"
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#include "common/common.h"
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#include "common/msg.h"
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#include "options/path.h"
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#include "misc/bstr.h"
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#include "core.h"
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#include "client.h"
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#include "libmpv/client.h"
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extern const struct mp_scripting mp_scripting_lua;
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static const struct mp_scripting *const scripting_backends[] = {
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#if HAVE_LUA
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&mp_scripting_lua,
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#endif
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NULL
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};
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static char *script_name_from_filename(void *talloc_ctx, const char *fname)
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{
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fname = mp_basename(fname);
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if (fname[0] == '@')
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fname += 1;
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char *name = talloc_strdup(talloc_ctx, fname);
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// Drop file extension
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char *dot = strrchr(name, '.');
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if (dot)
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*dot = '\0';
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// Turn it into a safe identifier - this is used with e.g. dispatching
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// input via: "send scriptname ..."
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for (int n = 0; name[n]; n++) {
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char c = name[n];
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if (!(c >= 'A' && c <= 'Z') && !(c >= 'a' && c <= 'z') &&
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!(c >= '0' && c <= '9'))
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name[n] = '_';
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}
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return talloc_asprintf(talloc_ctx, "%s", name);
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}
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struct thread_arg {
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struct mp_log *log;
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const struct mp_scripting *backend;
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mpv_handle *client;
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const char *fname;
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};
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static void *script_thread(void *p)
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{
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pthread_detach(pthread_self());
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struct thread_arg *arg = p;
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char name[90];
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snprintf(name, sizeof(name), "lua (%s)", mpv_client_name(arg->client));
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mpthread_set_name(name);
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if (arg->backend->load(arg->client, arg->fname) < 0)
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MP_ERR(arg, "Could not load script %s\n", arg->fname);
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MP_VERBOSE(arg, "Exiting...\n");
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mpv_detach_destroy(arg->client);
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talloc_free(arg);
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return NULL;
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}
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static void wait_loaded(struct MPContext *mpctx)
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{
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while (!mp_clients_all_initialized(mpctx))
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mp_idle(mpctx);
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}
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static void mp_load_script(struct MPContext *mpctx, const char *fname)
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{
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char *ext = mp_splitext(fname, NULL);
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const struct mp_scripting *backend = NULL;
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for (int n = 0; scripting_backends[n]; n++) {
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const struct mp_scripting *b = scripting_backends[n];
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if (ext && strcasecmp(ext, b->file_ext) == 0) {
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backend = b;
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break;
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}
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}
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if (!backend) {
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MP_VERBOSE(mpctx, "Can't load unknown script: %s\n", fname);
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return;
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}
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struct thread_arg *arg = talloc_ptrtype(NULL, arg);
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char *name = script_name_from_filename(arg, fname);
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*arg = (struct thread_arg){
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.fname = talloc_strdup(arg, fname),
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.backend = backend,
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// Create the client before creating the thread; otherwise a race
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// condition could happen, where MPContext is destroyed while the
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// thread tries to create the client.
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.client = mp_new_client(mpctx->clients, name),
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};
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if (!arg->client) {
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talloc_free(arg);
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return;
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}
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arg->log = mp_client_get_log(arg->client);
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MP_VERBOSE(arg, "Loading script %s...\n", fname);
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pthread_t thread;
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if (pthread_create(&thread, NULL, script_thread, arg))
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talloc_free(arg);
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wait_loaded(mpctx);
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MP_VERBOSE(mpctx, "Done loading %s.\n", fname);
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return;
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}
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static int compare_filename(const void *pa, const void *pb)
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{
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char *a = (char *)pa;
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char *b = (char *)pb;
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return strcmp(a, b);
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}
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static char **list_script_files(void *talloc_ctx, char *path)
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{
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char **files = NULL;
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int count = 0;
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DIR *dp = opendir(path);
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if (!dp)
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return NULL;
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struct dirent *ep;
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while ((ep = readdir(dp))) {
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char *fname = mp_path_join(talloc_ctx, bstr0(path), bstr0(ep->d_name));
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struct stat s;
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if (!stat(fname, &s) && S_ISREG(s.st_mode))
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MP_TARRAY_APPEND(talloc_ctx, files, count, fname);
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}
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closedir(dp);
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if (files)
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qsort(files, count, sizeof(char *), compare_filename);
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MP_TARRAY_APPEND(talloc_ctx, files, count, NULL);
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return files;
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}
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void mp_load_scripts(struct MPContext *mpctx)
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{
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// Load scripts from options
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if (mpctx->opts->lua_load_osc)
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mp_load_script(mpctx, "@osc.lua");
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char **files = mpctx->opts->lua_files;
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for (int n = 0; files && files[n]; n++) {
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if (files[n][0])
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mp_load_script(mpctx, files[n]);
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}
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if (!mpctx->opts->auto_load_scripts)
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return;
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// Load all lua scripts
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void *tmp = talloc_new(NULL);
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char **luadir = mp_find_all_config_files(tmp, mpctx->global, "lua");
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for (int i = 0; luadir && luadir[i]; i++) {
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files = list_script_files(tmp, luadir[i]);
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for (int n = 0; files && files[n]; n++)
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mp_load_script(mpctx, files[n]);
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}
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talloc_free(tmp);
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}
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