Win32: use clock field to discriminate static variables

This avoids having to make assumptions about the layout of the
underlying condition variables in the OS.

src/win32/thread.c

@@ -212,8 +212,9 @@ void vlc_mutex_unlock (vlc_mutex_t *p_mutex)
 /*** Condition variables ***/
 enum
 {
-    CLOCK_REALTIME=0, /* must be zero for VLC_STATIC_COND */
+    CLOCK_STATIC=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)
@@ -242,7 +243,7 @@ void vlc_cond_destroy (vlc_cond_t *p_condvar)
 
 void vlc_cond_signal (vlc_cond_t *p_condvar)
 {
-    if (!p_condvar->handle)
+    if (!p_condvar->clock)
         return;
 
     /* This is suboptimal but works. */
@@ -251,7 +252,7 @@ void vlc_cond_signal (vlc_cond_t *p_condvar)
 
 void vlc_cond_broadcast (vlc_cond_t *p_condvar)
 {
-    if (!p_condvar->handle)
+    if (!p_condvar->clock)
         return;
 
     /* Wake all threads up (as the event HANDLE has manual reset) */
@@ -262,7 +263,7 @@ void vlc_cond_wait (vlc_cond_t *p_condvar, vlc_mutex_t *p_mutex)
 {
     DWORD result;
 
-    if (!p_condvar->handle)
+    if (!p_condvar->clock)
     {   /* FIXME FIXME FIXME */
         msleep (50000);
         return;
@@ -285,12 +286,6 @@ 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 ();
@@ -298,13 +293,17 @@ int vlc_cond_timedwait (vlc_cond_t *p_condvar, vlc_mutex_t *p_mutex,
         mtime_t total;
         switch (p_condvar->clock)
         {
+            case CLOCK_MONOTONIC:
+                total = mdate();
+                break;
             case CLOCK_REALTIME: /* FIXME? sub-second precision */
                 total = CLOCK_FREQ * time (NULL);
                 break;
             default:
-                assert (p_condvar->clock == CLOCK_MONOTONIC);
-                total = mdate();
-                break;
+                assert (!p_condvar->clock);
+                /* FIXME FIXME FIXME */
+                msleep (50000);
+                return 0;
         }
         total = (deadline - total) / 1000;
         if( total < 0 )