egl: Rework the synchronization primitives.

This adds error checking to the synchronization primitives.  And
eglWaitGL is now implemented by eglWaitClient.

Signed-off-by: Chia-I Wu <olvaffe@gmail.com>

src/egl/main/eglapi.c

@@ -558,32 +558,66 @@ eglCopyBuffers(EGLDisplay dpy, EGLSurface surface, NativePixmapType target)
 
 
 EGLBoolean EGLAPIENTRY
-eglWaitGL(void)
+eglWaitClient(void)
 {
-   _EGLDisplay *disp = _eglGetCurrentDisplay();
+   _EGLContext *ctx = _eglGetCurrentContext();
+   _EGLDisplay *disp;
    _EGLDriver *drv;
 
-   if (!disp)
+   if (!ctx)
       return EGL_TRUE;
+   /* let bad current context imply bad current surface */
+   if (!_eglIsContextLinked(ctx) || !_eglIsSurfaceLinked(ctx->DrawSurface))
+      return _eglError(EGL_BAD_CURRENT_SURFACE, __FUNCTION__);
 
-   /* a current display is always initialized */
+   /* a valid current context implies an initialized current display */
+   disp = ctx->Display;
    drv = disp->Driver;
+   assert(drv);
+
+   return drv->API.WaitClient(drv, disp, ctx);
+}
+
 
-   return drv->API.WaitGL(drv, disp);
+EGLBoolean EGLAPIENTRY
+eglWaitGL(void)
+{
+#ifdef EGL_VERSION_1_2
+   _EGLThreadInfo *t = _eglGetCurrentThread();
+   EGLint api_index = t->CurrentAPIIndex;
+   EGLint es_index = _eglConvertApiToIndex(EGL_OPENGL_ES_API);
+   EGLBoolean ret;
+
+   if (api_index != es_index && _eglIsCurrentThreadDummy())
+      return _eglError(EGL_BAD_ALLOC, "eglWaitGL");
+
+   t->CurrentAPIIndex = es_index;
+   ret = eglWaitClient();
+   t->CurrentAPIIndex = api_index;
+   return ret;
+#else
+   return eglWaitClient();
+#endif
 }
 
 
 EGLBoolean EGLAPIENTRY
 eglWaitNative(EGLint engine)
 {
-   _EGLDisplay *disp = _eglGetCurrentDisplay();
+   _EGLContext *ctx = _eglGetCurrentContext();
+   _EGLDisplay *disp;
    _EGLDriver *drv;
 
-   if (!disp)
+   if (!ctx)
       return EGL_TRUE;
+   /* let bad current context imply bad current surface */
+   if (!_eglIsContextLinked(ctx) || !_eglIsSurfaceLinked(ctx->DrawSurface))
+      return _eglError(EGL_BAD_CURRENT_SURFACE, __FUNCTION__);
 
-   /* a current display is always initialized */
+   /* a valid current context implies an initialized current display */
+   disp = ctx->Display;
    drv = disp->Driver;
+   assert(drv);
 
    return drv->API.WaitNative(drv, disp, engine);
 }
@@ -958,20 +992,4 @@ eglReleaseThread(void)
 }
 
 
-EGLBoolean
-eglWaitClient(void)
-{
-   _EGLDisplay *disp = _eglGetCurrentDisplay();
-   _EGLDriver *drv;
-
-   if (!disp)
-      return EGL_TRUE;
-
-   /* a current display is always initialized */
-   drv = disp->Driver;
-
-   return drv->API.WaitClient(drv, disp);
-}
-
-
 #endif /* EGL_VERSION_1_2 */

src/egl/main/eglapi.h

@@ -41,7 +41,7 @@ typedef EGLBoolean (*CopyBuffers_t)(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurfa
 
 /* misc funcs */
 typedef const char *(*QueryString_t)(_EGLDriver *drv, _EGLDisplay *dpy, EGLint name);
-typedef EGLBoolean (*WaitGL_t)(_EGLDriver *drv, _EGLDisplay *dpy);
+typedef EGLBoolean (*WaitClient_t)(_EGLDriver *drv, _EGLDisplay *dpy, _EGLContext *ctx);
 typedef EGLBoolean (*WaitNative_t)(_EGLDriver *drv, _EGLDisplay *dpy, EGLint engine);
 
 typedef _EGLProc (*GetProcAddress_t)(const char *procname);
@@ -65,7 +65,6 @@ typedef const char * (*QueryModeStringMESA_t)(_EGLDriver *drv, _EGLDisplay *dpy,
 
 
 #ifdef EGL_VERSION_1_2
-typedef EGLBoolean (*WaitClient_t)(_EGLDriver *drv, _EGLDisplay *dpy);
 typedef _EGLSurface *(*CreatePbufferFromClientBuffer_t)(_EGLDriver *drv, _EGLDisplay *dpy, EGLenum buftype, EGLClientBuffer buffer, _EGLConfig *config, const EGLint *attrib_list);
 #endif /* EGL_VERSION_1_2 */
 
@@ -101,7 +100,7 @@ struct _egl_api
    CopyBuffers_t CopyBuffers;
 
    QueryString_t QueryString;
-   WaitGL_t WaitGL;
+   WaitClient_t WaitClient;
    WaitNative_t WaitNative;
    GetProcAddress_t GetProcAddress;
 
@@ -120,7 +119,6 @@ struct _egl_api
    QueryModeStringMESA_t QueryModeStringMESA;
 
 #ifdef EGL_VERSION_1_2
-   WaitClient_t WaitClient;
    CreatePbufferFromClientBuffer_t CreatePbufferFromClientBuffer;
 #endif
 };

src/egl/main/egldriver.c

@@ -408,7 +408,7 @@ _eglInitDriverFallbacks(_EGLDriver *drv)
    drv->API.CopyBuffers = _eglCopyBuffers;
 
    drv->API.QueryString = _eglQueryString;
-   drv->API.WaitGL = _eglWaitGL;
+   drv->API.WaitClient = _eglWaitClient;
    drv->API.WaitNative = _eglWaitNative;
 
 #ifdef EGL_MESA_screen_surface

src/egl/main/eglmisc.c

@@ -108,11 +108,12 @@ _eglQueryString(_EGLDriver *drv, _EGLDisplay *dpy, EGLint name)
 
 
 EGLBoolean
-_eglWaitGL(_EGLDriver *drv, _EGLDisplay *dpy)
+_eglWaitClient(_EGLDriver *drv, _EGLDisplay *dpy, _EGLContext *ctx)
 {
    /* just a placeholder */
    (void) drv;
    (void) dpy;
+   (void) ctx;
    return EGL_TRUE;
 }
 

src/egl/main/eglmisc.h

@@ -37,7 +37,7 @@ _eglQueryString(_EGLDriver *drv, _EGLDisplay *dpy, EGLint name);
 
 
 extern EGLBoolean
-_eglWaitGL(_EGLDriver *drv, _EGLDisplay *dpy);
+_eglWaitClient(_EGLDriver *drv, _EGLDisplay *dpy, _EGLContext *ctx);
 
 
 extern EGLBoolean