[PATCH 5/7] winemac: Use pthread for synchronization in opengl.c.

[Jacek Caban]

From: Jacek Caban

Signed-off-by: Jacek Caban 
---
 dlls/winemac.drv/opengl.c | 84 +++++++++++++++------------------------
 1 file changed, 31 insertions(+), 53 deletions(-)

diff --git a/dlls/winemac.drv/opengl.c b/dlls/winemac.drv/opengl.c
index d61d0a6ea66..8b8bba2d683 100644
--- a/dlls/winemac.drv/opengl.c
+++ b/dlls/winemac.drv/opengl.c
@@ -77,15 +77,7 @@ struct wgl_context
 };

static struct list context_list = LIST_INIT(context_list);
-
-static CRITICAL_SECTION context_section;
-static CRITICAL_SECTION_DEBUG critsect_debug =
-{
-    0, 0, &context_section,
-    { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
-      0, 0, { (DWORD_PTR)(__FILE__ ": context_section") }
-};
-static CRITICAL_SECTION context_section = { &critsect_debug, -1, 0, 0, 0, 0 };
+static pthread_mutex_t context_mutex = PTHREAD_MUTEX_INITIALIZER;

struct wgl_pbuffer
@@ -99,15 +91,7 @@ struct wgl_pbuffer
 };

static CFMutableDictionaryRef dc_pbuffers;
-
-static CRITICAL_SECTION dc_pbuffers_section;
-static CRITICAL_SECTION_DEBUG dc_pbuffers_section_debug =
-{
-    0, 0, &dc_pbuffers_section,
-    { &dc_pbuffers_section_debug.ProcessLocksList, &dc_pbuffers_section_debug.ProcessLocksList },
-      0, 0, { (DWORD_PTR)(__FILE__ ": dc_pbuffers_section") }
-};
-static CRITICAL_SECTION dc_pbuffers_section = { &dc_pbuffers_section_debug, -1, 0, 0, 0, 0 };
+static pthread_mutex_t dc_pbuffers_mutex = PTHREAD_MUTEX_INITIALIZER;

static struct opengl_funcs opengl_funcs;
@@ -1363,7 +1347,7 @@ static int get_dc_pixel_format(HDC hdc)
     {
         struct wgl_pbuffer *pbuffer;

-        EnterCriticalSection(&dc_pbuffers_section);
+        pthread_mutex_lock(&dc_pbuffers_mutex);
         pbuffer = (struct wgl_pbuffer*)CFDictionaryGetValue(dc_pbuffers, hdc);
         if (pbuffer)
             format = pbuffer->format;
@@ -1372,7 +1356,7 @@ static int get_dc_pixel_format(HDC hdc)
             WARN("no window or pbuffer for DC %p\n", hdc);
             format = 0;
         }
-        LeaveCriticalSection(&dc_pbuffers_section);
+        pthread_mutex_unlock(&dc_pbuffers_mutex);
     }

return format;
@@ -1612,13 +1596,13 @@ static void mark_contexts_for_moved_view(macdrv_view view)
 {
     struct wgl_context *context;

-    EnterCriticalSection(&context_section);
+    pthread_mutex_lock(&context_mutex);
     LIST_FOR_EACH_ENTRY(context, &context_list, struct wgl_context, entry)
     {
         if (context->draw_view == view)
             InterlockedExchange(&context->view_moved, TRUE);
     }
-    LeaveCriticalSection(&context_section);
+    pthread_mutex_unlock(&context_mutex);
 }

@@ -2885,9 +2869,9 @@ static struct wgl_context *macdrv_wglCreateContextAttribsARB(HDC hdc,
         return NULL;
     }

-    EnterCriticalSection(&context_section);
+    pthread_mutex_lock(&context_mutex);
     list_add_tail(&context_list, &context->entry);
-    LeaveCriticalSection(&context_section);
+    pthread_mutex_unlock(&context_mutex);

return context;
 }
@@ -3090,7 +3074,7 @@ static HDC macdrv_wglGetPbufferDCARB(struct wgl_pbuffer *pbuffer)
     hdc = CreateDCA("DISPLAY", NULL, NULL, NULL);
     if (!hdc) return 0;

-    EnterCriticalSection(&dc_pbuffers_section);
+    pthread_mutex_lock(&dc_pbuffers_mutex);
     prev = (struct wgl_pbuffer*)CFDictionaryGetValue(dc_pbuffers, hdc);
     if (prev)
     {
@@ -3098,7 +3082,7 @@ static HDC macdrv_wglGetPbufferDCARB(struct wgl_pbuffer *pbuffer)
         HeapFree(GetProcessHeap(), 0, prev);
     }
     CFDictionarySetValue(dc_pbuffers, hdc, pbuffer);
-    LeaveCriticalSection(&dc_pbuffers_section);
+    pthread_mutex_unlock(&dc_pbuffers_mutex);

TRACE("pbuffer %p -> hdc %p\n", pbuffer, hdc);
     return hdc;
@@ -3538,14 +3522,14 @@ static BOOL macdrv_wglMakeContextCurrentARB(HDC draw_hdc, HDC read_hdc, struct w
     {
         struct wgl_pbuffer *pbuffer;

-        EnterCriticalSection(&dc_pbuffers_section);
+        pthread_mutex_lock(&dc_pbuffers_mutex);
         pbuffer = (struct wgl_pbuffer*)CFDictionaryGetValue(dc_pbuffers, draw_hdc);
         if (pbuffer)
         {
             if (context->format != pbuffer->format)
             {
                 WARN("mismatched pixel format draw_hdc %p %u context %p %u\n", draw_hdc, pbuffer->format, context, context->format);
-                LeaveCriticalSection(&dc_pbuffers_section);
+                pthread_mutex_unlock(&dc_pbuffers_mutex);
                 SetLastError(ERROR_INVALID_PIXEL_FORMAT);
                 return FALSE;
             }
@@ -3556,7 +3540,7 @@ static BOOL macdrv_wglMakeContextCurrentARB(HDC draw_hdc, HDC read_hdc, struct w
         else
         {
             WARN("no window or pbuffer for DC\n");
-            LeaveCriticalSection(&dc_pbuffers_section);
+            pthread_mutex_unlock(&dc_pbuffers_mutex);
             SetLastError(ERROR_INVALID_HANDLE);
             return FALSE;
         }
@@ -3564,7 +3548,7 @@ static BOOL macdrv_wglMakeContextCurrentARB(HDC draw_hdc, HDC read_hdc, struct w
         context->draw_hwnd = NULL;
         context->draw_view = NULL;
         context->draw_pbuffer = pbuffer;
-        LeaveCriticalSection(&dc_pbuffers_section);
+        pthread_mutex_unlock(&dc_pbuffers_mutex);
     }

context->read_view = NULL;
@@ -3586,9 +3570,9 @@ static BOOL macdrv_wglMakeContextCurrentARB(HDC draw_hdc, HDC read_hdc, struct w
         }
         else
         {
-            EnterCriticalSection(&dc_pbuffers_section);
+            pthread_mutex_lock(&dc_pbuffers_mutex);
             context->read_pbuffer = (struct wgl_pbuffer*)CFDictionaryGetValue(dc_pbuffers, read_hdc);
-            LeaveCriticalSection(&dc_pbuffers_section);
+            pthread_mutex_unlock(&dc_pbuffers_mutex);
         }
     }

@@ -3933,7 +3917,7 @@ static int macdrv_wglReleasePbufferDCARB(struct wgl_pbuffer *pbuffer, HDC hdc)

TRACE("pbuffer %p hdc %p\n", pbuffer, hdc);

-    EnterCriticalSection(&dc_pbuffers_section);
+    pthread_mutex_lock(&dc_pbuffers_mutex);

prev = (struct wgl_pbuffer*)CFDictionaryGetValue(dc_pbuffers, hdc);
     if (prev)
@@ -3946,7 +3930,7 @@ static int macdrv_wglReleasePbufferDCARB(struct wgl_pbuffer *pbuffer, HDC hdc)
     }
     else hdc = 0;

-    LeaveCriticalSection(&dc_pbuffers_section);
+    pthread_mutex_unlock(&dc_pbuffers_mutex);

return hdc && DeleteDC(hdc);
 }
@@ -4109,13 +4093,13 @@ static BOOL macdrv_wglSwapIntervalEXT(int interval)
     {
         struct wgl_context *ctx;

-        EnterCriticalSection(&context_section);
+        pthread_mutex_lock(&context_mutex);
         LIST_FOR_EACH_ENTRY(ctx, &context_list, struct wgl_context, entry)
         {
             if (ctx != context && ctx->draw_hwnd == context->draw_hwnd)
                 InterlockedExchange(&context->update_swap_interval, TRUE);
         }
-        LeaveCriticalSection(&context_section);
+        pthread_mutex_unlock(&context_mutex);
     }

return TRUE;
@@ -4222,21 +4206,17 @@ static void load_extensions(void)
 }

-static BOOL CALLBACK init_opengl(INIT_ONCE *init_once, void *context, void **param)
+static void init_opengl(void)
 {
-    static BOOL init_done = FALSE;
     unsigned int i;

-    if (init_done) return (opengl_handle != NULL);
-    init_done = TRUE;
-
     TRACE("()\n");

dc_pbuffers = CFDictionaryCreateMutable(NULL, 0, NULL, NULL);
     if (!dc_pbuffers)
     {
         WARN("CFDictionaryCreateMutable failed\n");
-        return FALSE;
+        return;
     }

opengl_handle = dlopen("/System/Library/Frameworks/OpenGL.framework/OpenGL", RTLD_LAZY|RTLD_LOCAL|RTLD_NOLOAD);
@@ -4244,7 +4224,7 @@ static BOOL CALLBACK init_opengl(INIT_ONCE *init_once, void *context, void **par
     {
         ERR("Failed to load OpenGL: %s\n", dlerror());
         ERR("OpenGL support is disabled.\n");
-        return FALSE;
+        return;
     }

for (i = 0; i < ARRAY_SIZE(opengl_func_names); i++)
@@ -4285,12 +4265,11 @@ static BOOL CALLBACK init_opengl(INIT_ONCE *init_once, void *context, void **par
     if (!init_pixel_formats())
         goto failed;

-    return TRUE;
+    return ;

failed:
     dlclose(opengl_handle);
     opengl_handle = NULL;
-    return FALSE;
 }

@@ -4419,9 +4398,9 @@ static BOOL WINAPI macdrv_wglDeleteContext(struct wgl_context *context)
 {
     TRACE("deleting context %p/%p/%p\n", context, context->context, context->cglcontext);

-    EnterCriticalSection(&context_section);
+    pthread_mutex_lock(&context_mutex);
     list_remove(&context->entry);
-    LeaveCriticalSection(&context_section);
+    pthread_mutex_unlock(&context_mutex);

macdrv_dispose_opengl_context(context->context);
     return HeapFree(GetProcessHeap(), 0, context);
@@ -4583,9 +4562,9 @@ static BOOL WINAPI macdrv_wglSwapBuffers(HDC hdc)
     {
         struct wgl_pbuffer *pbuffer;

-        EnterCriticalSection(&dc_pbuffers_section);
+        pthread_mutex_lock(&dc_pbuffers_mutex);
         pbuffer = (struct wgl_pbuffer*)CFDictionaryGetValue(dc_pbuffers, hdc);
-        LeaveCriticalSection(&dc_pbuffers_section);
+        pthread_mutex_unlock(&dc_pbuffers_mutex);

if (!pbuffer)
         {
@@ -4634,7 +4613,7 @@ static struct opengl_funcs opengl_funcs =
  */
 struct opengl_funcs *macdrv_wine_get_wgl_driver(UINT version)
 {
-    static INIT_ONCE opengl_init = INIT_ONCE_STATIC_INIT;
+    static pthread_once_t init_once = PTHREAD_ONCE_INIT;

if (version != WINE_WGL_DRIVER_VERSION)
     {
@@ -4642,7 +4621,6 @@ struct opengl_funcs *macdrv_wine_get_wgl_driver(UINT version)
         return NULL;
     }

-    if (!InitOnceExecuteOnce(&opengl_init, init_opengl, NULL, NULL)) return (void *)-1;
-
-    return &opengl_funcs;
+    pthread_once(&init_once, init_opengl);
+    return opengl_handle ? &opengl_funcs : (void *)-1;
 }