From 6248f23859eb610079b1964e5f081ff0e9c62281 Mon Sep 17 00:00:00 2001 From: KO Myung-Hun Date: Thu, 12 Nov 2015 12:31:51 +0900 Subject: [PATCH] os2threads: Add pthread_once() Signed-off-by: Michael Niedermayer --- compat/os2threads.h | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/compat/os2threads.h b/compat/os2threads.h index 5b6ca5579d..f8fb2c8c63 100644 --- a/compat/os2threads.h +++ b/compat/os2threads.h @@ -32,6 +32,8 @@ #undef __STRICT_ANSI__ /* for _beginthread() */ #include +#include + #include "libavutil/mem.h" typedef TID pthread_t; @@ -47,6 +49,13 @@ typedef struct { typedef void pthread_condattr_t; +typedef struct { + volatile int done; + _fmutex mtx; +} pthread_once_t; + +#define PTHREAD_ONCE_INIT {0, _FMUTEX_INITIALIZER} + struct thread_arg { void *(*start_routine)(void *); void *arg; @@ -163,4 +172,22 @@ static av_always_inline int pthread_cond_wait(pthread_cond_t *cond, pthread_mute return 0; } +static av_always_inline int pthread_once(pthread_once_t *once_control, void (*init_routine)(void)) +{ + if (!once_control->done) + { + _fmutex_request(&once_control->mtx, 0); + + if (!once_control->done) + { + init_routine(); + + once_control->done = 1; + } + + _fmutex_release(&once_control->mtx); + } + + return 0; +} #endif /* AVCODEC_OS2PTHREADS_H */