diff options
| author | Marek Olšák <[email protected]> | 2011-02-19 00:16:44 +0100 |
|---|---|---|
| committer | Marek Olšák <[email protected]> | 2011-02-19 00:17:27 +0100 |
| commit | 0b436cf511316d4bf90246a39557900b4b566853 (patch) | |
| tree | 2bb1f9850eef22452ca65b5439e40c2b2ec41ff3 /src/gallium/drivers/r300/r300_context.c | |
| parent | e9e5380f22c230ea1276208baa40c3fe6482b296 (diff) | |
r300g: fix a possible race when counting contexts
Atomics aren't sufficient here.
Diffstat (limited to 'src/gallium/drivers/r300/r300_context.c')
| -rw-r--r-- | src/gallium/drivers/r300/r300_context.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/gallium/drivers/r300/r300_context.c b/src/gallium/drivers/r300/r300_context.c index a89bf7fac31..da6b0bb8aa7 100644 --- a/src/gallium/drivers/r300/r300_context.c +++ b/src/gallium/drivers/r300/r300_context.c @@ -38,19 +38,21 @@ static void r300_update_num_contexts(struct r300_screen *r300screen, int diff) { + pipe_mutex_lock(r300screen->num_contexts_mutex); if (diff > 0) { - p_atomic_inc(&r300screen->num_contexts); + r300screen->num_contexts++; if (r300screen->num_contexts > 1) util_slab_set_thread_safety(&r300screen->pool_buffers, UTIL_SLAB_MULTITHREADED); } else { - p_atomic_dec(&r300screen->num_contexts); + r300screen->num_contexts--; if (r300screen->num_contexts <= 1) util_slab_set_thread_safety(&r300screen->pool_buffers, UTIL_SLAB_SINGLETHREADED); } + pipe_mutex_unlock(r300screen->num_contexts_mutex); } static void r300_release_referenced_objects(struct r300_context *r300) |