mirror of https://github.com/mpv-player/mpv
93 lines
3.4 KiB
C
93 lines
3.4 KiB
C
#ifndef MP_OSDEP_THREADS_H_
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#define MP_OSDEP_THREADS_H_
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#include <pthread.h>
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#include <inttypes.h>
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#include "config.h"
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// Helper to reduce boiler plate.
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int mpthread_mutex_init_recursive(pthread_mutex_t *mutex);
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// Set thread name (for debuggers).
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void mpthread_set_name(const char *name);
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int mp_ptwrap_check(const char *file, int line, int res);
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int mp_ptwrap_mutex_init(const char *file, int line, pthread_mutex_t *m,
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const pthread_mutexattr_t *attr);
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int mp_ptwrap_mutex_trylock(const char *file, int line, pthread_mutex_t *m);
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#ifdef MP_PTHREAD_DEBUG
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// pthread debugging wrappers. Technically, this is undefined behavior, because
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// you are not supposed to define any symbols that clash with reserved names.
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// Other than that, they should be fine.
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// Note: mpv normally never checks pthread error return values of certain
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// functions that should never fail. It does so because these cases would
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// be undefined behavior anyway (such as double-frees etc.). However,
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// since there are no good pthread debugging tools, these wrappers are
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// provided for the sake of debugging. They crash on unexpected errors.
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//
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// Technically, pthread_cond/mutex_init() can fail with ENOMEM. We don't
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// really respect this for normal/recursive mutex types, as due to the
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// existence of static initializers, no sane implementation could actually
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// require allocating memory.
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#define MP_PTWRAP(fn, ...) \
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mp_ptwrap_check(__FILE__, __LINE__, (fn)(__VA_ARGS__))
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// ISO C defines that all standard functions can be macros, except undef'ing
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// them is allowed and must make the "real" definitions available. (Whatever.)
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#undef pthread_cond_init
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#undef pthread_cond_destroy
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#undef pthread_cond_broadcast
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#undef pthread_cond_signal
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#undef pthread_cond_wait
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#undef pthread_cond_timedwait
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#undef pthread_detach
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#undef pthread_join
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#undef pthread_mutex_destroy
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#undef pthread_mutex_lock
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#undef pthread_mutex_trylock
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#undef pthread_mutex_unlock
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#define pthread_cond_init(...) MP_PTWRAP(pthread_cond_init, __VA_ARGS__)
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#define pthread_cond_destroy(...) MP_PTWRAP(pthread_cond_destroy, __VA_ARGS__)
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#define pthread_cond_broadcast(...) MP_PTWRAP(pthread_cond_broadcast, __VA_ARGS__)
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#define pthread_cond_signal(...) MP_PTWRAP(pthread_cond_signal, __VA_ARGS__)
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#define pthread_cond_wait(...) MP_PTWRAP(pthread_cond_wait, __VA_ARGS__)
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#define pthread_cond_timedwait(...) MP_PTWRAP(pthread_cond_timedwait, __VA_ARGS__)
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#define pthread_detach(...) MP_PTWRAP(pthread_detach, __VA_ARGS__)
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#define pthread_join(...) MP_PTWRAP(pthread_join, __VA_ARGS__)
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#define pthread_mutex_destroy(...) MP_PTWRAP(pthread_mutex_destroy, __VA_ARGS__)
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#define pthread_mutex_lock(...) MP_PTWRAP(pthread_mutex_lock, __VA_ARGS__)
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#define pthread_mutex_unlock(...) MP_PTWRAP(pthread_mutex_unlock, __VA_ARGS__)
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#define pthread_mutex_init(...) \
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mp_ptwrap_mutex_init(__FILE__, __LINE__, __VA_ARGS__)
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#define pthread_mutex_trylock(...) \
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mp_ptwrap_mutex_trylock(__FILE__, __LINE__, __VA_ARGS__)
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#endif
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enum mp_mutex_type {
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MP_MUTEX_NORMAL = 0,
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MP_MUTEX_RECURSIVE,
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};
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#define mp_mutex_init(mutex) \
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mp_mutex_init_type(mutex, MP_MUTEX_NORMAL)
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#define mp_mutex_init_type(mutex, mtype) \
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assert(!mp_mutex_init_type_internal(mutex, mtype))
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#if HAVE_WIN32_THREADS
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#include "threads-win32.h"
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#else
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#include "threads-posix.h"
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#endif
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#endif
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