diff options
Diffstat (limited to 'src/backend/utils/mmgr/dsa.c')
| -rw-r--r-- | src/backend/utils/mmgr/dsa.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/backend/utils/mmgr/dsa.c b/src/backend/utils/mmgr/dsa.c index 17d4f7a7a06..be43e9351c3 100644 --- a/src/backend/utils/mmgr/dsa.c +++ b/src/backend/utils/mmgr/dsa.c @@ -532,6 +532,21 @@ dsa_attach(dsa_handle handle) } /* + * Returns whether the area with the given handle was already attached by the + * current process. The area must have been created with dsa_create (not + * dsa_create_in_place). + */ +bool +dsa_is_attached(dsa_handle handle) +{ + /* + * An area handle is really a DSM segment handle for the first segment, so + * we can just search for that. + */ + return dsm_find_mapping(handle) != NULL; +} + +/* * Attach to an area that was created with dsa_create_in_place. The caller * must somehow know the location in memory that was used when the area was * created, though it may be mapped at a different virtual address in this |