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Add const qualifiers to XLogRegister*() functions

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Add const qualifiers to XLogRegisterData() and XLogRegisterBufData().
Several unconstify() calls can be removed.

Reviewed-by: Aleksander Alekseev <aleksander@timescale.com>
Discussion: https://www.postgresql.org/message-id/dd889784-9ce7-436a-b4f1-52e4a5e577bd@eisentraut.org
This commit is contained in:
Peter Eisentraut 2024-09-03 08:00:38 +02:00
parent 4236825197
commit 2b5f57977f
9 changed files with 26 additions and 26 deletions
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4
src/backend/access/brin/brin_pageops.c
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@ -193,7 +193,7 @@ brin_doupdate(Relation idxrel, BlockNumber pagesPerRange,
XLogRegisterData((char *) &xlrec, SizeOfBrinSamepageUpdate);
XLogRegisterBuffer(0, oldbuf, REGBUF_STANDARD);
XLogRegisterBufData(0, (char *) unconstify(BrinTuple *, newtup), newsz);
XLogRegisterBufData(0, (const char *) newtup, newsz);
recptr = XLogInsert(RM_BRIN_ID, info);
@ -285,7 +285,7 @@ brin_doupdate(Relation idxrel, BlockNumber pagesPerRange,
XLogRegisterData((char *) &xlrec, SizeOfBrinUpdate);
XLogRegisterBuffer(0, newbuf, REGBUF_STANDARD | (extended ? REGBUF_WILL_INIT : 0));
XLogRegisterBufData(0, (char *) unconstify(BrinTuple *, newtup), newsz);
XLogRegisterBufData(0, (const char *) newtup, newsz);
/* revmap page */
XLogRegisterBuffer(1, revmapbuf, 0);

4
src/backend/access/transam/README
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@ -586,13 +586,13 @@ void XLogRegisterBuffer(uint8 block_id, Buffer buf, uint8 flags);
XLogRegisterBufData() is included in the WAL record even if a full-page
image is taken.
void XLogRegisterData(char *data, int len);
void XLogRegisterData(const char *data, int len);
XLogRegisterData is used to include arbitrary data in the WAL record. If
XLogRegisterData() is called multiple times, the data are appended, and
will be made available to the redo routine as one contiguous chunk.
void XLogRegisterBufData(uint8 block_id, char *data, int len);
void XLogRegisterBufData(uint8 block_id, const char *data, int len);
XLogRegisterBufData is used to include data associated with a particular
buffer that was registered earlier with XLogRegisterBuffer(). If

4
src/backend/access/transam/xact.c
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@ -5951,7 +5951,7 @@ XactLogCommitRecord(TimestampTz commit_time,
{
XLogRegisterData((char *) (&xl_twophase), sizeof(xl_xact_twophase));
if (xl_xinfo.xinfo & XACT_XINFO_HAS_GID)
XLogRegisterData(unconstify(char *, twophase_gid), strlen(twophase_gid) + 1);
XLogRegisterData(twophase_gid, strlen(twophase_gid) + 1);
}
if (xl_xinfo.xinfo & XACT_XINFO_HAS_ORIGIN)
@ -6097,7 +6097,7 @@ XactLogAbortRecord(TimestampTz abort_time,
{
XLogRegisterData((char *) (&xl_twophase), sizeof(xl_xact_twophase));
if (xl_xinfo.xinfo & XACT_XINFO_HAS_GID)
XLogRegisterData(unconstify(char *, twophase_gid), strlen(twophase_gid) + 1);
XLogRegisterData(twophase_gid, strlen(twophase_gid) + 1);
}
if (xl_xinfo.xinfo & XACT_XINFO_HAS_ORIGIN)

2
src/backend/access/transam/xlog.c
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@ -1248,7 +1248,7 @@ CopyXLogRecordToWAL(int write_len, bool isLogSwitch, XLogRecData *rdata,
written = 0;
while (rdata != NULL)
{
char *rdata_data = rdata->data;
const char *rdata_data = rdata->data;
int rdata_len = rdata->len;
while (rdata_len > freespace)

22
src/backend/access/transam/xloginsert.c
View File

@ -72,7 +72,7 @@ typedef struct
RelFileLocator rlocator; /* identifies the relation and block */
ForkNumber forkno;
BlockNumber block;
Page page; /* page content */
const char *page; /* page content */
uint32 rdata_len; /* total length of data in rdata chain */
XLogRecData *rdata_head; /* head of the chain of data registered with
* this block */
@ -138,7 +138,7 @@ static XLogRecData *XLogRecordAssemble(RmgrId rmid, uint8 info,
XLogRecPtr RedoRecPtr, bool doPageWrites,
XLogRecPtr *fpw_lsn, int *num_fpi,
bool *topxid_included);
static bool XLogCompressBackupBlock(char *page, uint16 hole_offset,
static bool XLogCompressBackupBlock(const char *page, uint16 hole_offset,
uint16 hole_length, char *dest, uint16 *dlen);
/*
@ -307,7 +307,7 @@ XLogRegisterBuffer(uint8 block_id, Buffer buffer, uint8 flags)
*/
void
XLogRegisterBlock(uint8 block_id, RelFileLocator *rlocator, ForkNumber forknum,
BlockNumber blknum, Page page, uint8 flags)
BlockNumber blknum, const char *page, uint8 flags)
{
registered_buffer *regbuf;
@ -361,7 +361,7 @@ XLogRegisterBlock(uint8 block_id, RelFileLocator *rlocator, ForkNumber forknum,
* XLogRecGetData().
*/
void
XLogRegisterData(char *data, uint32 len)
XLogRegisterData(const char *data, uint32 len)
{
XLogRecData *rdata;
@ -402,7 +402,7 @@ XLogRegisterData(char *data, uint32 len)
* limited)
*/
void
XLogRegisterBufData(uint8 block_id, char *data, uint32 len)
XLogRegisterBufData(uint8 block_id, const char *data, uint32 len)
{
registered_buffer *regbuf;
XLogRecData *rdata;
@ -648,7 +648,7 @@ XLogRecordAssemble(RmgrId rmid, uint8 info,
if (include_image)
{
Page page = regbuf->page;
const char *page = regbuf->page;
uint16 compressed_len = 0;
/*
@ -941,23 +941,23 @@ XLogRecordAssemble(RmgrId rmid, uint8 info,
* the length of compressed block image.
*/
static bool
XLogCompressBackupBlock(char *page, uint16 hole_offset, uint16 hole_length,
XLogCompressBackupBlock(const char *page, uint16 hole_offset, uint16 hole_length,
char *dest, uint16 *dlen)
{
int32 orig_len = BLCKSZ - hole_length;
int32 len = -1;
int32 extra_bytes = 0;
char *source;
const char *source;
PGAlignedBlock tmp;
if (hole_length != 0)
{
/* must skip the hole */
source = tmp.data;
memcpy(source, page, hole_offset);
memcpy(source + hole_offset,
memcpy(tmp.data, page, hole_offset);
memcpy(tmp.data + hole_offset,
page + (hole_offset + hole_length),
BLCKSZ - (hole_length + hole_offset));
source = tmp.data;
/*
* Extra data needs to be stored in WAL record for the compressed

4
src/backend/replication/logical/message.c
View File

@ -63,8 +63,8 @@ LogLogicalMessage(const char *prefix, const char *message, size_t size,
XLogBeginInsert();
XLogRegisterData((char *) &xlrec, SizeOfLogicalMessage);
XLogRegisterData(unconstify(char *, prefix), xlrec.prefix_size);
XLogRegisterData(unconstify(char *, message), size);
XLogRegisterData(prefix, xlrec.prefix_size);
XLogRegisterData(message, size);
/* allow origin filtering */
XLogSetRecordFlags(XLOG_INCLUDE_ORIGIN);

2
src/include/access/xlog_internal.h
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@ -312,7 +312,7 @@ typedef struct xl_end_of_recovery
typedef struct XLogRecData
{
struct XLogRecData *next; /* next struct in chain, or NULL */
char *data; /* start of rmgr data to include */
const char *data; /* start of rmgr data to include */
uint32 len; /* length of rmgr data to include */
} XLogRecData;

6
src/include/access/xloginsert.h
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@ -44,12 +44,12 @@ extern void XLogBeginInsert(void);
extern void XLogSetRecordFlags(uint8 flags);
extern XLogRecPtr XLogInsert(RmgrId rmid, uint8 info);
extern void XLogEnsureRecordSpace(int max_block_id, int ndatas);
extern void XLogRegisterData(char *data, uint32 len);
extern void XLogRegisterData(const char *data, uint32 len);
extern void XLogRegisterBuffer(uint8 block_id, Buffer buffer, uint8 flags);
extern void XLogRegisterBlock(uint8 block_id, RelFileLocator *rlocator,
ForkNumber forknum, BlockNumber blknum, char *page,
ForkNumber forknum, BlockNumber blknum, const char *page,
uint8 flags);
extern void XLogRegisterBufData(uint8 block_id, char *data, uint32 len);
extern void XLogRegisterBufData(uint8 block_id, const char *data, uint32 len);
extern void XLogResetInsertion(void);
extern bool XLogCheckBufferNeedsBackup(Buffer buffer);

4
src/include/storage/bufpage.h
View File

@ -384,9 +384,9 @@ PageGetMaxOffsetNumber(Page page)
* Additional functions for access to page headers.
*/
static inline XLogRecPtr
PageGetLSN(Page page)
PageGetLSN(const char *page)
{
return PageXLogRecPtrGet(((PageHeader) page)->pd_lsn);
return PageXLogRecPtrGet(((const PageHeaderData *) page)->pd_lsn);
}
static inline void
PageSetLSN(Page page, XLogRecPtr lsn)