mesa: Implement mutex/locking around texture object reference counting.

Use new _mesa_reference_texobj() function for referencing/unreferencing
textures.  Add new assertions/tests to try to detect invalid usage of
deleted textures.

cherry-picked from master (9e01b915f1243a3f551cb795b7124bd1e52ca15f)

1 files changed, 3 insertions, 11 deletions

diff --git a/src/mesa/main/context.c b/src/mesa/main/context.c
index 33f6d2c0d0c..279880cf401 100644
--- a/src/mesa/main/context.c
+++ b/src/mesa/main/context.c
@@ -500,19 +500,12 @@ alloc_shared_state( GLcontext *ctx )
    if (!ss->Default2DArray)
       goto cleanup;
 
-   /* Effectively bind the default textures to all texture units */
-   ss->Default1D->RefCount += MAX_TEXTURE_IMAGE_UNITS;
-   ss->Default2D->RefCount += MAX_TEXTURE_IMAGE_UNITS;
-   ss->Default3D->RefCount += MAX_TEXTURE_IMAGE_UNITS;
-   ss->DefaultCubeMap->RefCount += MAX_TEXTURE_IMAGE_UNITS;
-   ss->DefaultRect->RefCount += MAX_TEXTURE_IMAGE_UNITS;
-   ss->Default1DArray->RefCount += MAX_TEXTURE_IMAGE_UNITS;
-   ss->Default2DArray->RefCount += MAX_TEXTURE_IMAGE_UNITS;
+   /* sanity check */
+   assert(ss->Default1D->RefCount == 1);
 
    _glthread_INIT_MUTEX(ss->TexMutex);
    ss->TextureStateStamp = 0;
 
-
 #if FEATURE_EXT_framebuffer_object
    ss->FrameBuffers = _mesa_NewHashTable();
    if (!ss->FrameBuffers)
@@ -522,10 +515,9 @@ alloc_shared_state( GLcontext *ctx )
       goto cleanup;
 #endif
 
-
    return GL_TRUE;
 
- cleanup:
+cleanup:
    /* Ran out of memory at some point.  Free everything and return NULL */
    if (ss->DisplayList)
       _mesa_DeleteHashTable(ss->DisplayList);