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Fix LWLockAssign() so that it can safely be executed after postmaster

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initialization.  Add spinlocking, fix EXEC_BACKEND unsafeness.
This commit is contained in:
Tom Lane
2005-10-07 21:42:38 +00:00
parent 77d1de3c89
commit 82e861fbe1
2 changed files with 31 additions and 15 deletions
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5
src/backend/storage/ipc/shmem.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/ipc/shmem.c,v 1.85 2005/08/20 23:26:20 tgl Exp $
* $PostgreSQL: pgsql/src/backend/storage/ipc/shmem.c,v 1.86 2005/10/07 21:42:38 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -71,8 +71,7 @@ SHMEM_OFFSET ShmemBase; /* start address of shared memory */
static SHMEM_OFFSET ShmemEnd; /* end+1 address of shared memory */
NON_EXEC_STATIC slock_t *ShmemLock; /* spinlock for shared memory
* allocation */
slock_t *ShmemLock; /* spinlock for shared memory and LWLock allocation */
NON_EXEC_STATIC slock_t *ShmemIndexLock; /* spinlock for ShmemIndex */