1 files changed, 27 insertions, 4 deletions

diff --git a/include/compat/pthread.h b/include/compat/pthread.h
index 8b8c3c6..1527d3c 100644..100755
--- a/include/compat/pthread.h
+++ b/include/compat/pthread.h
@@ -8,6 +8,8 @@
 
 #ifdef _WIN32
 
+#include <malloc.h>
+#include <stdlib.h>
 #include <windows.h>
 
 /*
@@ -16,6 +18,11 @@
 #define PTHREAD_ONCE_INIT   { INIT_ONCE_STATIC_INIT }
 
 /*
+ * Static mutex initialization values.
+ */
+#define PTHREAD_MUTEX_INITIALIZER       { .lock = NULL }
+
+/*
  * Once definitions.
  */
 struct pthread_once {
@@ -55,27 +62,43 @@ pthread_equal(pthread_t t1, pthread_t t2)
         return t1 == t2;
 }
 
-typedef CRITICAL_SECTION pthread_mutex_t;
+struct pthread_mutex {
+        volatile LPCRITICAL_SECTION lock;
+};
+typedef struct pthread_mutex pthread_mutex_t;
 typedef void pthread_mutexattr_t;
 
 static inline int
 pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *attr)
 {
-        InitializeCriticalSection(mutex);
+        if ((mutex->lock = malloc(sizeof(CRITICAL_SECTION))) == NULL)
+                exit(ENOMEM);
+        InitializeCriticalSection(mutex->lock);
         return 0;
 }
 
 static inline int
 pthread_mutex_lock(pthread_mutex_t *mutex)
 {
-        EnterCriticalSection(mutex);
+        if (mutex->lock == NULL) {
+                LPCRITICAL_SECTION lcs;
+
+                if ((lcs = malloc(sizeof(CRITICAL_SECTION))) == NULL)
+                        exit(ENOMEM);
+                InitializeCriticalSection(lcs);
+                if (InterlockedCompareExchangePointer((PVOID*)&mutex->lock, (PVOID)lcs, NULL) != NULL) {
+                        DeleteCriticalSection(lcs);
+                        free(lcs);
+                }
+        }
+        EnterCriticalSection(mutex->lock);
         return 0;
 }
 
 static inline int
 pthread_mutex_unlock(pthread_mutex_t *mutex)
 {
-        LeaveCriticalSection(mutex);
+        LeaveCriticalSection(mutex->lock);
         return 0;
 }