From eeec2c3d951fed0d22e5dbf436d4a2d887e24221 Mon Sep 17 00:00:00 2001
From: Michal Krol <michal@vmware.com>
Date: Mon, 8 Feb 2010 19:43:42 +0100
Subject: [PATCH] mesa: Protect buffer objects reference counting with a mutex.

---
 src/mesa/main/bufferobj.c | 10 ++++++----
 src/mesa/main/mtypes.h    |  1 +
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/src/mesa/main/bufferobj.c b/src/mesa/main/bufferobj.c
index 9e765b21d2f..2271550efe1 100644
--- a/src/mesa/main/bufferobj.c
+++ b/src/mesa/main/bufferobj.c
@@ -214,6 +214,7 @@ _mesa_delete_buffer_object( GLcontext *ctx, struct gl_buffer_object *bufObj )
    bufObj->RefCount = -1000;
    bufObj->Name = ~0;
 
+   _glthread_DESTROY_MUTEX(bufObj->Mutex);
    _mesa_free(bufObj);
 }
 
@@ -235,7 +236,7 @@ _mesa_reference_buffer_object(GLcontext *ctx,
       GLboolean deleteFlag = GL_FALSE;
       struct gl_buffer_object *oldObj = *ptr;
 
-      /*_glthread_LOCK_MUTEX(oldObj->Mutex);*/
+      _glthread_LOCK_MUTEX(oldObj->Mutex);
       ASSERT(oldObj->RefCount > 0);
       oldObj->RefCount--;
 #if 0
@@ -243,7 +244,7 @@ _mesa_reference_buffer_object(GLcontext *ctx,
              (void *) oldObj, oldObj->Name, oldObj->RefCount);
 #endif
       deleteFlag = (oldObj->RefCount == 0);
-      /*_glthread_UNLOCK_MUTEX(oldObj->Mutex);*/
+      _glthread_UNLOCK_MUTEX(oldObj->Mutex);
 
       if (deleteFlag) {
 
@@ -265,7 +266,7 @@ _mesa_reference_buffer_object(GLcontext *ctx,
 
    if (bufObj) {
       /* reference new buffer */
-      /*_glthread_LOCK_MUTEX(tex->Mutex);*/
+      _glthread_LOCK_MUTEX(bufObj->Mutex);
       if (bufObj->RefCount == 0) {
          /* this buffer's being deleted (look just above) */
          /* Not sure this can every really happen.  Warn if it does. */
@@ -280,7 +281,7 @@ _mesa_reference_buffer_object(GLcontext *ctx,
 #endif
          *ptr = bufObj;
       }
-      /*_glthread_UNLOCK_MUTEX(tex->Mutex);*/
+      _glthread_UNLOCK_MUTEX(bufObj->Mutex);
    }
 }
 
@@ -295,6 +296,7 @@ _mesa_initialize_buffer_object( struct gl_buffer_object *obj,
    (void) target;
 
    _mesa_bzero(obj, sizeof(struct gl_buffer_object));
+   _glthread_INIT_MUTEX(obj->Mutex);
    obj->RefCount = 1;
    obj->Name = name;
    obj->Usage = GL_STATIC_DRAW_ARB;
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 2640ba5ac42..20035417b97 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -1426,6 +1426,7 @@ struct gl_viewport_attrib
  */
 struct gl_buffer_object
 {
+   _glthread_Mutex Mutex;
    GLint RefCount;
    GLuint Name;
    GLenum Usage;        /**< GL_STREAM_DRAW_ARB, GL_STREAM_READ_ARB, etc. */
-- 
2.30.2