diff options
| -rw-r--r-- | src/gallium/include/pipe/p_refcnt.h | 28 |
1 files changed, 14 insertions, 14 deletions
diff --git a/src/gallium/include/pipe/p_refcnt.h b/src/gallium/include/pipe/p_refcnt.h index 1f89453e09..1f9088b3e9 100644 --- a/src/gallium/include/pipe/p_refcnt.h +++ b/src/gallium/include/pipe/p_refcnt.h @@ -62,29 +62,29 @@ pipe_is_referenced(struct pipe_reference *reference) * Set 'ptr' to point to 'reference' and update reference counting. * The old thing pointed to, if any, will be unreferenced first. * 'reference' may be NULL. - * - * XXX: thread safety issues! */ static INLINE bool pipe_reference(struct pipe_reference **ptr, struct pipe_reference *reference) { bool destroy = FALSE; - /* bump the reference.count first */ - if (reference) { - assert(pipe_is_referenced(reference)); - p_atomic_inc(&reference->count); - } - - if (*ptr) { - assert(pipe_is_referenced(*ptr)); - if (p_atomic_dec_zero(&(*ptr)->count)) { - destroy = TRUE; + if(*ptr != reference) { + /* bump the reference.count first */ + if (reference) { + assert(pipe_is_referenced(reference)); + p_atomic_inc(&reference->count); } + + if (*ptr) { + assert(pipe_is_referenced(*ptr)); + if (p_atomic_dec_zero(&(*ptr)->count)) { + destroy = TRUE; + } + } + + *ptr = reference; } - *ptr = reference; - return destroy; } |