database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-08-07 02:42:48 +03:00
Code Activity

Add codec support to wal mode.

Browse Source 
FossilOrigin-Name: 393741eba353d5d242b8e3c96db3ea2b92228036
This commit is contained in:
dan
2010-06-22 15:18:44 +00:00
parent 242c4f7702
commit 47ee386f06
8 changed files with 81 additions and 65 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
src/wal.c
View File

@@ -2286,19 +2286,22 @@ int sqlite3WalFrames(
for(p=pList; p; p=p->pDirty){
u32 nDbsize; /* Db-size field for frame header */
i64 iOffset; /* Write offset in log file */
void *pData;
iOffset = walFrameOffset(++iFrame, szPage);
/* Populate and write the frame header */
nDbsize = (isCommit && p->pDirty==0) ? nTruncate : 0;
walEncodeFrame(pWal, p->pgno, nDbsize, p->pData, aFrame);
if( (pData = sqlite3PagerCodec(p))==0 ) return SQLITE_NOMEM;
walEncodeFrame(pWal, p->pgno, nDbsize, pData, aFrame);
rc = sqlite3OsWrite(pWal->pWalFd, aFrame, sizeof(aFrame), iOffset);
if( rc!=SQLITE_OK ){
return rc;
}
/* Write the page data */
rc = sqlite3OsWrite(pWal->pWalFd, p->pData, szPage, iOffset+sizeof(aFrame));
rc = sqlite3OsWrite(pWal->pWalFd, pData, szPage, iOffset+sizeof(aFrame));
if( rc!=SQLITE_OK ){
return rc;
}
@@ -2315,14 +2318,15 @@ int sqlite3WalFrames(
iSegment = (((iOffset+iSegment-1)/iSegment) * iSegment);
while( iOffset<iSegment ){
walEncodeFrame(pWal, pLast->pgno, nTruncate, pLast->pData, aFrame);
void *pData;
if( (pData = sqlite3PagerCodec(pLast))==0 ) return SQLITE_NOMEM;
walEncodeFrame(pWal, pLast->pgno, nTruncate, pData, aFrame);
rc = sqlite3OsWrite(pWal->pWalFd, aFrame, sizeof(aFrame), iOffset);
if( rc!=SQLITE_OK ){
return rc;
}
iOffset += WAL_FRAME_HDRSIZE;
rc = sqlite3OsWrite(pWal->pWalFd, pLast->pData, szPage, iOffset);
rc = sqlite3OsWrite(pWal->pWalFd, pData, szPage, iOffset);
if( rc!=SQLITE_OK ){
return rc;
}