Commit 4707b4f4 authored by Rémi Denis-Courmont's avatar Rémi Denis-Courmont
Browse files

Win32: emulate static condition variables

This is really poor implementation, but it is not really used.
parent 6e54f3fd
......@@ -144,6 +144,7 @@ typedef struct
HANDLE handle;
unsigned clock;
} vlc_cond_t;
#define VLC_STATIC_COND { 0, 0, 0 }
typedef HANDLE vlc_sem_t;
......
......@@ -232,8 +232,8 @@ void vlc_mutex_unlock (vlc_mutex_t *p_mutex)
/*** Condition variables ***/
enum
{
CLOCK_REALTIME=0, /* must be zero for VLC_STATIC_COND */
CLOCK_MONOTONIC,
CLOCK_REALTIME,
};
static void vlc_cond_init_common (vlc_cond_t *p_condvar, unsigned clock)
......@@ -262,16 +262,19 @@ void vlc_cond_destroy (vlc_cond_t *p_condvar)
void vlc_cond_signal (vlc_cond_t *p_condvar)
{
/* NOTE: This will cause a broadcast, that is wrong.
* This will also wake up the next waiting thread if no threads are yet
* waiting, which is also wrong. However both of these issues are allowed
* by the provision for spurious wakeups. Better have too many wakeups
* than too few (= deadlocks). */
SetEvent (p_condvar->handle);
if (!p_condvar->handle)
return;
/* This is suboptimal but works. */
vlc_cond_broadcast (p_condvar);
}
void vlc_cond_broadcast (vlc_cond_t *p_condvar)
{
if (!p_condvar->handle)
return;
/* Wake all threads up (as the event HANDLE has manual reset) */
SetEvent (p_condvar->handle);
}
......@@ -279,6 +282,12 @@ void vlc_cond_wait (vlc_cond_t *p_condvar, vlc_mutex_t *p_mutex)
{
DWORD result;
if (!p_condvar->handle)
{ /* FIXME FIXME FIXME */
msleep (50000);
return;
}
do
{
vlc_testcancel ();
......@@ -296,6 +305,12 @@ int vlc_cond_timedwait (vlc_cond_t *p_condvar, vlc_mutex_t *p_mutex,
{
DWORD result;
if (!p_condvar->handle)
{ /* FIXME FIXME FIXME */
msleep (50000);
return 0;
}
do
{
vlc_testcancel ();
......
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