From 894c1459c1938bfd15dd72f2297985084ddf5afd Mon Sep 17 00:00:00 2001
From: "Michael I. Gold" <gold@nvidia.com>
Date: Thu, 23 Dec 2010 13:51:36 -0800
Subject: [PATCH] egl: fixes for object refcounts

eglMakeCurrent() would only deref the previous surfaces if the old and
new contexts were the same.  eglTerminate() should not touch TLS.
eglReleaseThread() needs to unbind the current context.

Change-Id: I7f4c090a287ee1e29e4708ae10679fb9d7d8c8c5
Related-Bug: 2964479
---
 opengl/libs/EGL/egl.cpp | 51 +++++++++++++++++++++++++----------------
 1 file changed, 31 insertions(+), 20 deletions(-)

diff --git a/opengl/libs/EGL/egl.cpp b/opengl/libs/EGL/egl.cpp
index ebe2193d7..7e0c16943 100644
--- a/opengl/libs/EGL/egl.cpp
+++ b/opengl/libs/EGL/egl.cpp
@@ -814,7 +814,7 @@ EGLBoolean eglTerminate(EGLDisplay dpy)
     dp->refs--;
     dp->numTotalConfigs = 0;
     delete [] dp->configs;
-    clearTLS();
+
     return res;
 }
 
@@ -1150,6 +1150,27 @@ EGLBoolean eglDestroyContext(EGLDisplay dpy, EGLContext ctx)
     return result;
 }
 
+static void loseCurrent(egl_context_t * cur_c)
+{
+    if (cur_c) {
+        egl_surface_t * cur_r = get_surface(cur_c->read);
+        egl_surface_t * cur_d = get_surface(cur_c->draw);
+
+        // by construction, these are either 0 or valid (possibly terminated)
+        // it should be impossible for these to be invalid
+        ContextRef _cur_c(cur_c);
+        SurfaceRef _cur_r(cur_r);
+        SurfaceRef _cur_d(cur_d);
+
+        cur_c->read = NULL;
+        cur_c->draw = NULL;
+
+        _cur_c.release();
+        _cur_r.release();
+        _cur_d.release();
+    }
+}
+
 EGLBoolean eglMakeCurrent(  EGLDisplay dpy, EGLSurface draw,
                             EGLSurface read, EGLContext ctx)
 {
@@ -1178,13 +1199,9 @@ EGLBoolean eglMakeCurrent(  EGLDisplay dpy, EGLSurface draw,
 
     // these are the current objects structs
     egl_context_t * cur_c = get_context(getContext());
-    egl_surface_t * cur_r = NULL;
-    egl_surface_t * cur_d = NULL;
     
     if (ctx != EGL_NO_CONTEXT) {
         c = get_context(ctx);
-        cur_r = get_surface(c->read);
-        cur_d = get_surface(c->draw);
         impl_ctx = c->context;
     } else {
         // no context given, use the implementation of the current context
@@ -1230,30 +1247,21 @@ EGLBoolean eglMakeCurrent(  EGLDisplay dpy, EGLSurface draw,
     }
 
     if (result == EGL_TRUE) {
-        // by construction, these are either 0 or valid (possibly terminated)
-        // it should be impossible for these to be invalid
-        ContextRef _cur_c(cur_c);
-        SurfaceRef _cur_r(cur_r);
-        SurfaceRef _cur_d(cur_d);
 
-        // cur_c has to be valid here (but could be terminated)
+        loseCurrent(cur_c);
+
         if (ctx != EGL_NO_CONTEXT) {
             setGlThreadSpecific(c->cnx->hooks[c->version]);
             setContext(ctx);
             _c.acquire();
+            _r.acquire();
+            _d.acquire();
+            c->read = read;
+            c->draw = draw;
         } else {
             setGlThreadSpecific(&gHooksNoContext);
             setContext(EGL_NO_CONTEXT);
         }
-        _cur_c.release();
-
-        _r.acquire();
-        _cur_r.release();
-        if (c) c->read = read;
-
-        _d.acquire();
-        _cur_d.release();
-        if (c) c->draw = draw;
     }
     return result;
 }
@@ -1637,6 +1645,9 @@ EGLenum eglQueryAPI(void)
 
 EGLBoolean eglReleaseThread(void)
 {
+    // If there is context bound to the thread, release it
+    loseCurrent(get_context(getContext()));
+
     for (int i=0 ; i<IMPL_NUM_IMPLEMENTATIONS ; i++) {
         egl_connection_t* const cnx = &gEGLImpl[i];
         if (cnx->dso) {