Horton

[PATCH 02/16] Add zeroRecPtr as a shortcut for initializing a local variable to {0, 0}

Andres Freund <andres@2ndquadrant.com>

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From: Andres Freund <andres@2ndquadrant.com>
To: pgsql-hackers@postgresql.org
Date: 2012-06-13T11:28:33Z
Lists: pgsql-hackers

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. Don't waste the last segment of each 4GB logical log file.

  2. Stamp HEAD as 9.3devel.

  3. Wake WALSender to reduce data loss at failover for async commit.

  4. Make the visibility map crash-safe.

From: Andres Freund <andres@anarazel.de>

This is locally defined in lots of places and would get introduced frequently
in the next commits. It is expected that this can be defined in a header-only
manner as soon as the XLogInsert scalability groundwork from Heikki gets in.
---
 src/backend/access/transam/xlogutils.c |    1 +
 src/include/access/xlogdefs.h          |    1 +
 2 files changed, 2 insertions(+)

diff --git a/src/backend/access/transam/xlogutils.c b/src/backend/access/transam/xlogutils.c
index 6ddcc59..3a2462b 100644
--- a/src/backend/access/transam/xlogutils.c
+++ b/src/backend/access/transam/xlogutils.c
@@ -51,6 +51,7 @@ typedef struct xl_invalid_page
 
 static HTAB *invalid_page_tab = NULL;
 
+XLogRecPtr zeroRecPtr = {0, 0};
 
 /* Report a reference to an invalid page */
 static void
diff --git a/src/include/access/xlogdefs.h b/src/include/access/xlogdefs.h
index 5e6d7e6..2768427 100644
--- a/src/include/access/xlogdefs.h
+++ b/src/include/access/xlogdefs.h
@@ -35,6 +35,7 @@ typedef struct XLogRecPtr
 	uint32		xrecoff;		/* byte offset of location in log file */
 } XLogRecPtr;
 
+extern XLogRecPtr zeroRecPtr;
 #define XLogRecPtrIsInvalid(r)	((r).xrecoff == 0)
 
 
-- 
1.7.10.rc3.3.g19a6c.dirty