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Simplify Windows implementation of latches. There's no need to keep a

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dynamic pool of event handles, we can permanently assign one for each
shared latch. Thanks to that, we no longer need a separate shared memory
block for latches, and we don't need to know in advance how many shared
latches there is, so you no longer need to remember to update
NumSharedLatches when you introduce a new latch to the system.
This commit is contained in:
Heikki Linnakangas
2010-09-15 10:06:21 +00:00
parent 1eab7a560d
commit 236b6bc29e
4 changed files with 39 additions and 153 deletions
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5
src/backend/storage/ipc/ipci.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/ipc/ipci.c,v 1.105 2010/09/11 15:48:04 heikki Exp $
* $PostgreSQL: pgsql/src/backend/storage/ipc/ipci.c,v 1.106 2010/09/15 10:06:21 heikki Exp $
*
*-------------------------------------------------------------------------
*/
@@ -30,7 +30,6 @@
#include "replication/walsender.h"
#include "storage/bufmgr.h"
#include "storage/ipc.h"
#include "storage/latch.h"
#include "storage/pg_shmem.h"
#include "storage/pmsignal.h"
#include "storage/procarray.h"
@@ -118,7 +117,6 @@ CreateSharedMemoryAndSemaphores(bool makePrivate, int port)
size = add_size(size, SInvalShmemSize());
size = add_size(size, PMSignalShmemSize());
size = add_size(size, ProcSignalShmemSize());
size = add_size(size, LatchShmemSize());
size = add_size(size, BgWriterShmemSize());
size = add_size(size, AutoVacuumShmemSize());
size = add_size(size, WalSndShmemSize());
@@ -219,7 +217,6 @@ CreateSharedMemoryAndSemaphores(bool makePrivate, int port)
*/
PMSignalShmemInit();
ProcSignalShmemInit();
LatchShmemInit();
BgWriterShmemInit();
AutoVacuumShmemInit();
WalSndShmemInit();