/*
* Initialize the shared-memory for this module.
*/
void PersistentFilespace_ShmemInit(void)
{
bool found;
bool ok;
/* Create the shared-memory structure. */
persistentFilespaceSharedData =
(PersistentFilespaceSharedData *)
ShmemInitStruct("Persistent Filespace Data",
PersistentFilespace_SharedDataSize(),
&found);
if (!found)
{
PersistentFileSysObj_InitShared(
&persistentFilespaceSharedData->fileSysObjSharedData);
}
/* Create or find our shared-memory hash table. */
ok = PersistentFilespace_HashTableInit();
if (!ok)
ereport(FATAL,
(errcode(ERRCODE_OUT_OF_MEMORY),
errmsg("Not enough shared memory for persistent filespace hash table")));
PersistentFileSysObj_Init(
&persistentFilespaceData.fileSysObjData,
&persistentFilespaceSharedData->fileSysObjSharedData,
PersistentFsObjType_FilespaceDir,
PersistentFilespace_ScanTupleCallback);
Assert(persistentFilespaceSharedData != NULL);
Assert(persistentFilespaceSharedHashTable != NULL);
}
/*
* Return the required shared-memory size for this module.
*/
Size PersistentFilespace_ShmemSize(void)
{
Size size;
/* The hash table of persistent filespaces */
size = hash_estimate_size((Size)gp_max_filespaces,
sizeof(FilespaceDirEntryData));
/* The shared-memory structure. */
size = add_size(size, PersistentFilespace_SharedDataSize());
return size;
}
/*
* Return the required shared-memory size for this module.
*/
Size PersistentFilespace_ShmemSize(void)
{
Size size;
/* The hash table of persistent filespaces */
size = hash_estimate_size((Size)gp_max_filespaces,
sizeof(FilespaceDirEntryData));
/* The shared-memory structure. */
size = add_size(size, PersistentFilespace_SharedDataSize());
elog(LOG, "PersistentFilespace_ShmemSize: %zu = "
"gp_max_filespaces: %d "
"* sizeof(FilespaceDirEntryData): %zu "
"+ PersistentFilespace_SharedDataSize(): %zu",
size,
gp_max_filespaces,
sizeof(FilespaceDirEntryData),
PersistentFilespace_SharedDataSize());
return size;
}