/*
* Forget that a buffer pin is owned by a ResourceOwner
*/
void
ResourceOwnerForgetBuffer(ResourceOwner owner, Buffer buffer)
{
if (!ResourceArrayRemove(&(owner->bufferarr), BufferGetDatum(buffer)))
elog(ERROR, "buffer %d is not owned by resource owner %s",
buffer, owner->name);
}
/*
* ResourceOwnerCreate
* Create an empty ResourceOwner.
*
* All ResourceOwner objects are kept in TopMemoryContext, since they should
* only be freed explicitly.
*/
ResourceOwner
ResourceOwnerCreate(ResourceOwner parent, const char *name)
{
ResourceOwner owner;
owner = (ResourceOwner) MemoryContextAllocZero(TopMemoryContext,
sizeof(ResourceOwnerData));
owner->name = name;
if (parent)
{
owner->parent = parent;
owner->nextchild = parent->firstchild;
parent->firstchild = owner;
}
ResourceArrayInit(&(owner->bufferarr), BufferGetDatum(InvalidBuffer));
ResourceArrayInit(&(owner->catrefarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->catlistrefarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->relrefarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->planrefarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->tupdescarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->snapshotarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->filearr), FileGetDatum(-1));
ResourceArrayInit(&(owner->dsmarr), PointerGetDatum(NULL));
ResourceArrayInit(&(owner->jitarr), PointerGetDatum(NULL));
return owner;
}
/*
* Remember that a buffer pin is owned by a ResourceOwner
*
* Caller must have previously done ResourceOwnerEnlargeBuffers()
*
* We allow the case owner == NULL because the bufmgr is sometimes invoked
* outside any transaction (for example, during WAL recovery).
*/
void
ResourceOwnerRememberBuffer(ResourceOwner owner, Buffer buffer)
{
if (owner == NULL)
return;
ResourceArrayAdd(&(owner->bufferarr), BufferGetDatum(buffer));
}
/*
* Remember that a buffer pin is owned by a ResourceOwner
*
* Caller must have previously done ResourceOwnerEnlargeBuffers()
*/
void
ResourceOwnerRememberBuffer(ResourceOwner owner, Buffer buffer)
{
ResourceArrayAdd(&(owner->bufferarr), BufferGetDatum(buffer));
}