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Get rid of the SpinLockAcquire/SpinLockAcquire_NoHoldoff distinction

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in favor of having just one set of macros that don't do HOLD/RESUME_INTERRUPTS
(hence, these correspond to the old SpinLockAcquire_NoHoldoff case).
Given our coding rules for spinlock use, there is no reason to allow
CHECK_FOR_INTERRUPTS to be done while holding a spinlock, and also there
is no situation where ImmediateInterruptOK will be true while holding a
spinlock.  Therefore doing HOLD/RESUME_INTERRUPTS while taking/releasing a
spinlock is just a waste of cycles.  Qingqing Zhou and Tom Lane.
This commit is contained in:
Tom Lane
2005-12-29 18:08:05 +00:00
parent e135d9631b
commit 195f164228
6 changed files with 80 additions and 112 deletions
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3
src/backend/storage/ipc/shmem.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/ipc/shmem.c,v 1.88 2005/11/22 18:17:20 momjian Exp $
* $PostgreSQL: pgsql/src/backend/storage/ipc/shmem.c,v 1.89 2005/12/29 18:08:05 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -58,6 +58,7 @@
#include "postgres.h"
#include "access/transam.h"
#include "miscadmin.h"
#include "storage/pg_shmem.h"
#include "storage/spin.h"
#include "utils/tqual.h"