[ This description should have been on the earlier fork/exec

bmomjian · bmomjian · commit ced30eb8575d · 2003-12-21T04:30:10.000Z
commit, but I am adding it now so it is in CVS.]

The patch basically is a slight rearrangement of the code to allow
fork/exec on Unix, with the ultimate goal of doing CreateProcess on
Win32.  The changes are:

        o  Write out postmaster global variables and per-backend
variables to be read by the exec'ed backend

        o  Mark some static variables as global when exec is used so
then can be dumped from postmaster.c, marked NON_EXEC_STATIC

        o  Remove value passing with -p now that we have per-backend
file

        o  Move some pointer storage out of shared memory for easier
dumping.

        o  Modified pgsql_temp directory cleanup to handle per-database
directories and the backend exec directory under datadir.


Claudio Natoli
diff --git a/src/backend/storage/ipc/shmem.c b/src/backend/storage/ipc/shmem.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/storage/ipc/shmem.c,v 1.75 2003/12/20 17:31:21 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/storage/ipc/shmem.c,v 1.76 2003/12/21 04:30:10 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -258,9 +258,7 @@ InitShmemIndex(void)
  * ShmemInitHash -- Create/Attach to and initialize
  *		shared memory hash table.
  *
- * Notes:
- *
- * assume caller is doing some kind of synchronization
+ * We assume caller is doing some kind of synchronization
  * so that two people dont try to create/initialize the
  * table at once.
  */

Original file line number	Diff line number	Diff line change
`@@ -8,7 +8,7 @@`
`8`	`8`	`*`
`9`	`9`	`*`
`10`	`10`	`* IDENTIFICATION`
`11`		`- * $PostgreSQL: pgsql/src/backend/storage/ipc/shmem.c,v 1.75 2003/12/20 17:31:21 momjian Exp $`
	`11`	`+ * $PostgreSQL: pgsql/src/backend/storage/ipc/shmem.c,v 1.76 2003/12/21 04:30:10 momjian Exp $`
`12`	`12`	`*`
`13`	`13`	`*-------------------------------------------------------------------------`
`14`	`14`	`*/`
`@@ -258,9 +258,7 @@ InitShmemIndex(void)`
`258`	`258`	`* ShmemInitHash -- Create/Attach to and initialize`
`259`	`259`	`* shared memory hash table.`
`260`	`260`	`*`
`261`		`- * Notes:`
`262`		`- *`
`263`		`- * assume caller is doing some kind of synchronization`
	`261`	`+ * We assume caller is doing some kind of synchronization`
`264`	`262`	`* so that two people dont try to create/initialize the`
`265`	`263`	`* table at once.`
`266`	`264`	`*/`