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Add support for loadable modules to allocated shared memory and

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lightweight locks.

Marc Munro
This commit is contained in:
Bruce Momjian
2006-08-01 19:03:11 +00:00
parent c61607bd52
commit 2c6d96cef6
6 changed files with 261 additions and 13 deletions
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22
src/backend/storage/ipc/ipci.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/ipc/ipci.c,v 1.86 2006/07/15 15:47:17 tgl Exp $
* $PostgreSQL: pgsql/src/backend/storage/ipc/ipci.c,v 1.87 2006/08/01 19:03:11 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@@ -57,6 +57,7 @@ CreateSharedMemoryAndSemaphores(bool makePrivate, int port)
{
PGShmemHeader *seghdr;
Size size;
Size size_b4addins;
int numSemas;
/*
@@ -93,6 +94,15 @@ CreateSharedMemoryAndSemaphores(bool makePrivate, int port)
/* might as well round it off to a multiple of a typical page size */
size = add_size(size, 8192 - (size % 8192));
/*
* The shared memory for add-ins is treated as a separate
* segment, but in reality it is not.
*/
size_b4addins = size;
size = add_size(size, AddinShmemSize());
/* round it off again */
size = add_size(size, 8192 - (size % 8192));
elog(DEBUG3, "invoking IpcMemoryCreate(size=%lu)",
(unsigned long) size);
@@ -101,6 +111,16 @@ CreateSharedMemoryAndSemaphores(bool makePrivate, int port)
*/
seghdr = PGSharedMemoryCreate(size, makePrivate, port);
/*
* Modify hdr to show segment size before add-ins
*/
seghdr->totalsize = size_b4addins;
/*
* Set up segment header sections in each Addin context
*/
InitAddinContexts((void *) ((char *) seghdr + size_b4addins));
InitShmemAccess(seghdr);
/*