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compat/w32pthreads: use the condition variable API directly when targeting newer versions of Windows 

Wrap the function calls in a similar fashion to how it's being done
with the critical section API.

Reviewed-by: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer 2014-10-09 17:49:22 -03:00
parent 241b306b1e
commit 8c6992bf0c
1 changed files with 39 additions and 22 deletions
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61
compat/w32pthreads.h
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@ -65,28 +65,7 @@ typedef struct pthread_cond_t {
} pthread_cond_t;
#endif
/* function pointers to conditional variable API on windows 6.0+ kernels */
#if _WIN32_WINNT < 0x0600
static void (WINAPI *cond_broadcast)(pthread_cond_t *cond);
static void (WINAPI *cond_init)(pthread_cond_t *cond);
static void (WINAPI *cond_signal)(pthread_cond_t *cond);
static BOOL (WINAPI *cond_wait)(pthread_cond_t *cond, pthread_mutex_t *mutex,
DWORD milliseconds);
#else
#define cond_init InitializeConditionVariable
#define cond_broadcast WakeAllConditionVariable
#define cond_signal WakeConditionVariable
#define cond_wait SleepConditionVariableCS
#define CreateEvent(a, reset, init, name) \
CreateEventEx(a, name, \
(reset ? CREATE_EVENT_MANUAL_RESET : 0) | \
(init ? CREATE_EVENT_INITIAL_SET : 0), \
EVENT_ALL_ACCESS)
// CreateSemaphoreExA seems to be desktop-only, but as long as we don't
// use named semaphores, it doesn't matter if we use the W version.
#define CreateSemaphore(a, b, c, d) \
CreateSemaphoreExW(a, b, c, d, 0, SEMAPHORE_ALL_ACCESS)
#if _WIN32_WINNT >= 0x0600
#define InitializeCriticalSection(x) InitializeCriticalSectionEx(x, 0, 0)
#define WaitForSingleObject(a, b) WaitForSingleObjectEx(a, b, FALSE)
#endif
@ -139,6 +118,36 @@ static inline int pthread_mutex_unlock(pthread_mutex_t *m)
return 0;
}
#if _WIN32_WINNT >= 0x0600
static inline int pthread_cond_init(pthread_cond_t *cond, const void *unused_attr)
{
InitializeConditionVariable(cond);
return 0;
}
/* native condition variables do not destroy */
static inline void pthread_cond_destroy(pthread_cond_t *cond)
{
return;
}
static inline void pthread_cond_broadcast(pthread_cond_t *cond)
{
WakeAllConditionVariable(cond);
}
static inline int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)
{
SleepConditionVariableCS(cond, mutex, INFINITE);
return 0;
}
static inline void pthread_cond_signal(pthread_cond_t *cond)
{
WakeConditionVariable(cond);
}
#else // _WIN32_WINNT < 0x0600
/* for pre-Windows 6.0 platforms we need to define and use our own condition
* variable and api */
typedef struct win32_cond_t {
@ -150,6 +159,13 @@ typedef struct win32_cond_t {
volatile int is_broadcast;
} win32_cond_t;
/* function pointers to conditional variable API on windows 6.0+ kernels */
static void (WINAPI *cond_broadcast)(pthread_cond_t *cond);
static void (WINAPI *cond_init)(pthread_cond_t *cond);
static void (WINAPI *cond_signal)(pthread_cond_t *cond);
static BOOL (WINAPI *cond_wait)(pthread_cond_t *cond, pthread_mutex_t *mutex,
DWORD milliseconds);
static av_unused int pthread_cond_init(pthread_cond_t *cond, const void *unused_attr)
{
win32_cond_t *win32_cond = NULL;
@ -278,6 +294,7 @@ static av_unused void pthread_cond_signal(pthread_cond_t *cond)
pthread_mutex_unlock(&win32_cond->mtx_broadcast);
}
#endif
static av_unused void w32thread_init(void)
{