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mesa: Make _mesa_share_state thread safe.

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This commit is contained in:
José Fonseca
2009-05-01 18:52:54 +01:00
committed by Keith Whitwell
parent 25a4156a8b
commit b25168c34c
1 changed files with 9 additions and 2 deletions
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11
src/mesa/main/context.c
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@@ -1394,14 +1394,21 @@ _mesa_share_state(GLcontext *ctx, GLcontext *ctxToShare)
{
if (ctx && ctxToShare && ctx->Shared && ctxToShare->Shared) {
struct gl_shared_state *oldSharedState = ctx->Shared;
GLint RefCount;
ctx->Shared = ctxToShare->Shared;
_glthread_LOCK_MUTEX(ctx->Shared->Mutex);
ctx->Shared->RefCount++;
_glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
update_default_objects(ctx);
oldSharedState->RefCount--;
if (oldSharedState->RefCount == 0) {
_glthread_LOCK_MUTEX(oldSharedState->Mutex);
RefCount = --oldSharedState->RefCount;
_glthread_UNLOCK_MUTEX(oldSharedState->Mutex);
if (RefCount == 0) {
_mesa_free_shared_state(ctx, oldSharedState);
}