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Rename CACHE_LINE_SIZE to PG_CACHE_LINE_SIZE.

As noted inhttp://bugs.debian.org/763098 there is a conflict betweenpostgres' definition of CACHE_LINE_SIZE and the definition by various*bsd platforms. It's debatable who has the right to define such aname, but postgres' use was only introduced in375d852 (9.4), soit seems like a good idea to rename it.Discussion: 20140930195756.GC27407@msg.df7cb.dePer complaint of Christoph Berg in the above email, although he's notthe original bug reporter.Backpatch to 9.4 where the define was introduced.

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2 files changed

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lines changed

src
- backend/access/transam
  - xlog.c
- include
  - pg_config_manual.h

2 files changed

-3

lines changed

`‎src/backend/access/transam/xlog.c`

Lines changed: 2 additions & 2 deletions

Original file line number	Diff line number	Diff line change
`@@ -408,7 +408,7 @@ typedef struct`
`408`	`408`	`typedefunionWALInsertLockPadded`
`409`	`409`	`{`
`410`	`410`	`WALInsertLockl;`
`411`		`-charpad[CACHE_LINE_SIZE];`
	`411`	`+charpad[PG_CACHE_LINE_SIZE];`
`412`	`412`	`}WALInsertLockPadded;`
`413`	`413`
`414`	`414`	`/*`
`@@ -435,7 +435,7 @@ typedef struct XLogCtlInsert`
`435`	`435`	`* read on every WAL insertion, but updated rarely, and we don't want`
`436`	`436`	`* those reads to steal the cache line containing Curr/PrevBytePos.`
`437`	`437`	`*/`
`438`		`-charpad[CACHE_LINE_SIZE];`
	`438`	`+charpad[PG_CACHE_LINE_SIZE];`
`439`	`439`
`440`	`440`	`/*`
`441`	`441`	`* fullPageWrites is the master copy used by all backends to determine`

`‎src/include/pg_config_manual.h`

Lines changed: 1 addition & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -216,7 +216,7 @@`
`216`	`216`	`* bytes of wasted memory. The default is 128, which should be large enough`
`217`	`217`	`* for all supported platforms.`
`218`	`218`	`*/`
`219`		`-#defineCACHE_LINE_SIZE128`
	`219`	`+#definePG_CACHE_LINE_SIZE128`
`220`	`220`
`221`	`221`	`/*`
`222`	`222`	`*------------------------------------------------------------------------`

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Commitf78319f

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2 files changed

2 files changed

`‎src/backend/access/transam/xlog.c`

`‎src/include/pg_config_manual.h`

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