wgl: Enable the use of Win32 threads.

src/gallium/state_trackers/wgl/SConscript

@@ -14,6 +14,7 @@ if env['platform'] in ['windows']:
     env.Append(CPPDEFINES = [
         '_GDI32_', # prevent wgl* being declared __declspec(dllimport)
         'BUILD_GL32', # declare gl* as __declspec(dllexport) in Mesa headers 
+        'WIN32_THREADS', # use Win32 thread API
     ])
      
     sources = [

src/gallium/state_trackers/wgl/shared/stw_device.c

@@ -27,6 +27,7 @@
 
 #include <windows.h>
 
+#include "glapi/glthread.h"
 #include "util/u_debug.h"
 #include "pipe/p_screen.h"
 
@@ -35,6 +36,11 @@
 #include "shared/stw_pixelformat.h"
 #include "shared/stw_public.h"
 
+#ifdef WIN32_THREADS
+extern _glthread_Mutex OneTimeLock;
+extern void FreeAllTSD(void);
+#endif
+
 
 struct stw_device *stw_dev = NULL;
 
@@ -73,6 +79,10 @@ st_init(const struct stw_winsys *stw_winsys)
    
    stw_dev->stw_winsys = stw_winsys;
 
+#ifdef WIN32_THREADS
+   _glthread_INIT_MUTEX(OneTimeLock);
+#endif
+
    stw_dev->screen = stw_winsys->create_screen();
    if(!stw_dev->screen)
       goto error1;
@@ -114,6 +124,11 @@ st_cleanup(void)
    
    stw_dev->screen->destroy(stw_dev->screen);
 
+#ifdef WIN32_THREADS
+   _glthread_DESTROY_MUTEX(OneTimeLock);
+   FreeAllTSD();
+#endif
+
 #ifdef DEBUG
    debug_memory_end(stw_dev->memdbg_no);
 #endif

src/mesa/SConscript

@@ -16,6 +16,7 @@ if env['platform'] != 'winddk':
 		env.Append(CPPDEFINES = [
 			'_GDI32_', # prevent gl* being declared __declspec(dllimport) in MS headers
 			'BUILD_GL32', # declare gl* as __declspec(dllexport) in Mesa headers 
+			'WIN32_THREADS', # use Win32 thread API
 		])	 
 
 	#