diff options
Diffstat (limited to 'osdep/threads.h')
-rw-r--r-- | osdep/threads.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/osdep/threads.h b/osdep/threads.h index 8633618009..1c5dbf8a3e 100644 --- a/osdep/threads.h +++ b/osdep/threads.h @@ -10,4 +10,59 @@ int mpthread_mutex_init_recursive(pthread_mutex_t *mutex); // Set thread name (for debuggers). void mpthread_set_name(const char *name); +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); + +#ifdef MP_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_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__) + +#endif + #endif |