Turn all mutexes into critical sections

Removing all win32 mutexes and turning them into critical
sections, since mutexes in win32 are meant generally for
inter process communication, tend to be slower, and aren't
really needed for current purposes. Critical sections
are roughly equivalent to std::mutex in the c++ stl.

src/win/win_thread.c

@@ -133,17 +133,23 @@ thread_destroy_event(event_t *arg)
 
 mutex_t *
 thread_create_mutex(void)
-{
-    return((mutex_t*)CreateMutex(NULL, FALSE, NULL));
+{    
+    mutex_t *mutex = malloc(sizeof(CRITICAL_SECTION));
+
+    InitializeCriticalSection(mutex);
+
+    return mutex;
 }
 
 
-void
-thread_close_mutex(mutex_t *mutex)
+mutex_t *
+thread_create_mutex_with_spin_count(unsigned int spin_count)
 {
-    if (mutex == NULL) return;
+    mutex_t *mutex = malloc(sizeof(CRITICAL_SECTION));
 
-    CloseHandle((HANDLE)mutex);
+    InitializeCriticalSectionAndSpinCount(mutex, spin_count);
+
+    return mutex;
 }
 
 
@@ -152,47 +158,7 @@ thread_wait_mutex(mutex_t *mutex)
 {
     if (mutex == NULL) return(0);
 
-    DWORD dwres = WaitForSingleObject((HANDLE)mutex, INFINITE);
-
-    if (dwres == WAIT_OBJECT_0) return(1);
-
-    return(0);
-}
-
-
-int
-thread_release_mutex(mutex_t *mutex)
-{
-    if (mutex == NULL) return(0);
-
-    return(!!ReleaseMutex((HANDLE)mutex));
-}
-
-
-lightmutex_t *
-thread_create_light_mutex()
-{
-    return thread_create_light_mutex_and_spin_count(LIGHT_MUTEX_DEFAULT_SPIN_COUNT);
-}
-
-
-lightmutex_t *
-thread_create_light_mutex_and_spin_count(unsigned int spin_count)
-{
-    lightmutex_t *lightmutex = malloc(sizeof(CRITICAL_SECTION));
-
-    InitializeCriticalSectionAndSpinCount(lightmutex, spin_count);
-
-    return lightmutex;
-}
-
-
-int
-thread_wait_light_mutex(lightmutex_t *lightmutex)
-{
-    if (lightmutex == NULL) return(0);
-
-    LPCRITICAL_SECTION critsec = (LPCRITICAL_SECTION)lightmutex;
+    LPCRITICAL_SECTION critsec = (LPCRITICAL_SECTION)mutex;
 
     EnterCriticalSection(critsec);
 
@@ -201,11 +167,11 @@ thread_wait_light_mutex(lightmutex_t *lightmutex)
 
 
 int
-thread_release_light_mutex(lightmutex_t *lightmutex)
+thread_release_mutex(mutex_t *mutex)
 {
-    if (lightmutex == NULL) return(0);
+    if (mutex == NULL) return(0);
 
-    LPCRITICAL_SECTION critsec = (LPCRITICAL_SECTION)lightmutex;
+    LPCRITICAL_SECTION critsec = (LPCRITICAL_SECTION)mutex;
 
     LeaveCriticalSection(critsec);
 
@@ -214,11 +180,11 @@ thread_release_light_mutex(lightmutex_t *lightmutex)
 
 
 void
-thread_close_light_mutex(lightmutex_t *lightmutex)
+thread_close_mutex(mutex_t *mutex)
 {
-    if (lightmutex == NULL) return;
+    if (mutex == NULL) return;
 
-    LPCRITICAL_SECTION critsec = (LPCRITICAL_SECTION)lightmutex;
+    LPCRITICAL_SECTION critsec = (LPCRITICAL_SECTION)mutex;
 
     DeleteCriticalSection(critsec);