diff options
Diffstat (limited to 'src/gallium/drivers/vc4/vc4_bufmgr.h')
| -rw-r--r-- | src/gallium/drivers/vc4/vc4_bufmgr.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/gallium/drivers/vc4/vc4_bufmgr.h b/src/gallium/drivers/vc4/vc4_bufmgr.h index 4e7b23e0862..e0f6bbcfd8b 100644 --- a/src/gallium/drivers/vc4/vc4_bufmgr.h +++ b/src/gallium/drivers/vc4/vc4_bufmgr.h @@ -39,6 +39,14 @@ struct vc4_bo { uint32_t handle; uint32_t size; + /* This will be read/written by multiple threads without a lock -- you + * should take a snapshot and use it to see if you happen to be in the + * CL's handles at this position, to make most lookups O(1). It's + * volatile to make sure that the compiler doesn't emit multiple loads + * from the address, which would make the lookup racy. + */ + volatile uint32_t last_hindex; + /** Entry in the linked list of buffers freed, by age. */ struct list_head time_list; /** Entry in the per-page-count linked list of buffers freed (by age). */ |