diff options
Diffstat (limited to 'src/backend/storage/ipc')
-rw-r--r-- | src/backend/storage/ipc/dsm_registry.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/src/backend/storage/ipc/dsm_registry.c b/src/backend/storage/ipc/dsm_registry.c index 828c2ff0c7f..1682cc6d34c 100644 --- a/src/backend/storage/ipc/dsm_registry.c +++ b/src/backend/storage/ipc/dsm_registry.c @@ -40,10 +40,12 @@ #include "postgres.h" +#include "funcapi.h" #include "lib/dshash.h" #include "storage/dsm_registry.h" #include "storage/lwlock.h" #include "storage/shmem.h" +#include "utils/builtins.h" #include "utils/memutils.h" #define DSMR_NAME_LEN 128 @@ -88,6 +90,13 @@ typedef enum DSMREntryType DSMR_ENTRY_TYPE_DSH, } DSMREntryType; +static const char *const DSMREntryTypeNames[] = +{ + [DSMR_ENTRY_TYPE_DSM] = "segment", + [DSMR_ENTRY_TYPE_DSA] = "area", + [DSMR_ENTRY_TYPE_DSH] = "hash", +}; + typedef struct DSMRegistryEntry { char name[DSMR_NAME_LEN]; @@ -435,3 +444,43 @@ GetNamedDSHash(const char *name, const dshash_parameters *params, bool *found) return ret; } + +Datum +pg_get_dsm_registry_allocations(PG_FUNCTION_ARGS) +{ + ReturnSetInfo *rsinfo = (ReturnSetInfo *) fcinfo->resultinfo; + DSMRegistryEntry *entry; + MemoryContext oldcontext; + dshash_seq_status status; + + InitMaterializedSRF(fcinfo, MAT_SRF_USE_EXPECTED_DESC); + + /* Be sure any local memory allocated by DSM/DSA routines is persistent. */ + oldcontext = MemoryContextSwitchTo(TopMemoryContext); + init_dsm_registry(); + MemoryContextSwitchTo(oldcontext); + + dshash_seq_init(&status, dsm_registry_table, false); + while ((entry = dshash_seq_next(&status)) != NULL) + { + Datum vals[3]; + bool nulls[3] = {0}; + + vals[0] = CStringGetTextDatum(entry->name); + vals[1] = CStringGetTextDatum(DSMREntryTypeNames[entry->type]); + + /* + * Since we can't know the size of DSA/dshash entries without first + * attaching to them, return NULL for those. + */ + if (entry->type == DSMR_ENTRY_TYPE_DSM) + vals[2] = Int64GetDatum(entry->data.dsm.size); + else + nulls[2] = true; + + tuplestore_putvalues(rsinfo->setResult, rsinfo->setDesc, vals, nulls); + } + dshash_seq_term(&status); + + return (Datum) 0; +} |