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Reorganize our CRC source files again.

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Now that we use CRC-32C in WAL and the control file, the "traditional" and
"legacy" CRC-32 variants are not used in any frontend programs anymore.
Move the code for those back from src/common to src/backend/utils/hash.

Also move the slicing-by-8 implementation (back) to src/port. This is in
preparation for next patch that will add another implementation that uses
Intel SSE 4.2 instructions to calculate CRC-32C, where available.
This commit is contained in:
Heikki Linnakangas
2015-04-14 17:03:42 +03:00
parent d577bb868d
commit 4f700bcd20
25 changed files with 211 additions and 181 deletions
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6
src/include/access/xlogrecord.h
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@ -13,7 +13,7 @@
#include "access/rmgr.h"
#include "access/xlogdefs.h"
#include "common/pg_crc.h"
#include "port/pg_crc32c.h"
#include "storage/block.h"
#include "storage/relfilenode.h"
@ -46,13 +46,13 @@ typedef struct XLogRecord
uint8 xl_info; /* flag bits, see below */
RmgrId xl_rmid; /* resource manager for this record */
/* 2 bytes of padding here, initialize to zero */
pg_crc32 xl_crc; /* CRC for this record */
pg_crc32c xl_crc; /* CRC for this record */
/* XLogRecordBlockHeaders and XLogRecordDataHeader follow, no padding */
} XLogRecord;
#define SizeOfXLogRecord (offsetof(XLogRecord, xl_crc) + sizeof(pg_crc32))
#define SizeOfXLogRecord (offsetof(XLogRecord, xl_crc) + sizeof(pg_crc32c))
/*
* The high 4 bits in xl_info may be used freely by rmgr. The