MemContext Struct Reference

MemContexts are large single chunks of shared memory from which smaller allocations may be made. More...

#include <veil_shmem.h>

Data Fields
Oid	db_id
	Identifier for the database for which this context was created, or by which it has been taken over. More...
LWLock *	lwlock
	The LWLock associated with this memory context.
size_t	next
	Offset of 1st free byte.
size_t	limit
	Offset, of 1st byte beyond this struct.
LWLockPadded *	lwlock_tranche
	A tranche of lwlocks (only used in the zeroth MemContext. More...
int	lwlock_idx
	Index into the above. More...
struct ShmemCtl *	memctl
	Pointer to shared memory control structure. More...
void *	memory [0]
	The rest of the chunk, from which memory is allocated.

Detailed Description

MemContexts are large single chunks of shared memory from which smaller allocations may be made.

Definition at line 54 of file veil_shmem.h.

Field Documentation

db_id

Oid MemContext::db_id

Identifier for the database for which this context was created, or by which it has been taken over.

Definition at line 55 of file veil_shmem.h.

Referenced by get_shmem_context().

lwlock_tranche

LWLockPadded* MemContext::lwlock_tranche

A tranche of lwlocks (only used in the zeroth MemContext.

Definition at line 64 of file veil_shmem.h.

Referenced by get_shmem_context(), and NextLWLock().

lwlock_idx

int MemContext::lwlock_idx

Index into the above.

Definition at line 66 of file veil_shmem.h.

Referenced by get_shmem_context(), and NextLWLock().

memctl

struct ShmemCtl* MemContext::memctl

Pointer to shared memory control structure.

Definition at line 67 of file veil_shmem.h.

Referenced by shmalloc_init().

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The documentation for this struct was generated from the following file:

• src/veil_shmem.h