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w32pthreads: Load dynamically loaded functions on demand 

This removes the requirement of calling w32thread_init before being
able to use the threading primitives.

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
This commit is contained in:
Hendrik Leppkes 2015-10-07 15:15:14 +02:00 committed by Luca Barbato
parent b22693b06d
commit 2830bce47e
1 changed files with 10 additions and 0 deletions
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10
compat/w32pthreads.h
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@ -160,6 +160,11 @@ static inline void pthread_cond_signal(pthread_cond_t *cond)
}
#else // _WIN32_WINNT < 0x0600
/* atomic init state of dynamically loaded functions */
static LONG w32thread_init_state = 0;
static av_unused void w32thread_init(void);
/* for pre-Windows 6.0 platforms, define INIT_ONCE struct,
* compatible to the one used in the native API */
@ -200,6 +205,8 @@ static inline void w32thread_once_fallback(LONG volatile *state, void (*init_rou
static av_unused int pthread_once(pthread_once_t *once_control, void (*init_routine)(void))
{
w32thread_once_fallback(&w32thread_init_state, w32thread_init);
/* Use native functions on Windows 6.0+ */
if (initonce_begin && initonce_complete) {
BOOL pending = FALSE;
@ -236,6 +243,9 @@ static BOOL (WINAPI *cond_wait)(pthread_cond_t *cond, pthread_mutex_t *mutex,
static av_unused void pthread_cond_init(pthread_cond_t *cond, const void *unused_attr)
{
win32_cond_t *win32_cond = NULL;
w32thread_once_fallback(&w32thread_init_state, w32thread_init);
if (cond_init) {
cond_init(cond);
return;