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Overview
| Comment: | Formatting changes on the multiplexor code - make sure no lines exceed 80 characters. No logical changes. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
ed5f0aad6b21066bacd01521e82c22e9 |
| User & Date: | drh 2011-07-19 18:29:00 |
Context
|
2011-07-20
| ||
| 16:35 | When the multiplexor opens an auxiliary file, it now persists the name of that file until it is closed, as it should. Remove the limit on the number of auxiliary files used by the multiplexor. check-in: 1ffa542b user: drh tags: trunk | |
|
2011-07-19
| ||
| 18:29 | Formatting changes on the multiplexor code - make sure no lines exceed 80 characters. No logical changes. check-in: ed5f0aad user: drh tags: trunk | |
| 15:27 | Increase the version number to 3.7.8. check-in: 4355bf29 user: drh tags: trunk | |
Changes
Changes to src/test_multiplex.c.
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j = multiplexStrlen30(zBuf);
if( (j + 8 + 1 + 3 + 1) <= nBuf ){
/* Make 3 attempts to generate a unique name. */
do {
attempts++;
sqlite3_randomness(8, &zBuf[j]);
for(i=0; i<8; i++){
zBuf[j+i] = (char)zChars[ ((unsigned char)zBuf[j+i])%(sizeof(zChars)-1) ];
}
memcpy(&zBuf[j+i], ".tmp", 5);
rc = pOrigVfs->xAccess(pOrigVfs, zBuf, SQLITE_ACCESS_EXISTS, &exists);
} while ( (rc==SQLITE_OK) && exists && (attempts<3) );
if( rc==SQLITE_OK && exists ){
rc = SQLITE_ERROR;
}
................................................................................
return rc;
}
/* Translate an sqlite3_file* that is really a multiplexGroup* into
** the sqlite3_file* for the underlying original VFS.
*/
static sqlite3_file *multiplexSubOpen(multiplexConn *pConn, int iChunk, int *rc, int *pOutFlags){
multiplexGroup *pGroup = pConn->pGroup;
sqlite3_vfs *pOrigVfs = gMultiplex.pOrigVfs; /* Real VFS */
if( iChunk<pGroup->nMaxChunks ){
sqlite3_file *pSubOpen = pGroup->pReal[iChunk]; /* Real file descriptor */
if( !pGroup->bOpen[iChunk] ){
memcpy(gMultiplex.zName, pGroup->zName, pGroup->nName+1);
if( iChunk ){
#ifdef SQLITE_MULTIPLEX_EXT_OVWR
sqlite3_snprintf(SQLITE_MULTIPLEX_EXT_SZ+1, gMultiplex.zName+pGroup->nName-SQLITE_MULTIPLEX_EXT_SZ, SQLITE_MULTIPLEX_EXT_FMT, iChunk);
#else
sqlite3_snprintf(SQLITE_MULTIPLEX_EXT_SZ+1, gMultiplex.zName+pGroup->nName, SQLITE_MULTIPLEX_EXT_FMT, iChunk);
#endif
}
*rc = pOrigVfs->xOpen(pOrigVfs, gMultiplex.zName, pSubOpen, pGroup->flags, pOutFlags);
if( *rc==SQLITE_OK ){
pGroup->bOpen[iChunk] = -1;
return pSubOpen;
}
return NULL;
}
*rc = SQLITE_OK;
................................................................................
static int multiplexOpen(
sqlite3_vfs *pVfs, /* The multiplex VFS */
const char *zName, /* Name of file to be opened */
sqlite3_file *pConn, /* Fill in this file descriptor */
int flags, /* Flags to control the opening */
int *pOutFlags /* Flags showing results of opening */
){
int rc = SQLITE_OK; /* Result code */
multiplexConn *pMultiplexOpen; /* The new multiplex file descriptor */
multiplexGroup *pGroup; /* Corresponding multiplexGroup object */
sqlite3_file *pSubOpen; /* Real file descriptor */
sqlite3_vfs *pOrigVfs = gMultiplex.pOrigVfs; /* Real VFS */
int nName;
int i;
int sz;
UNUSED_PARAMETER(pVfs);
................................................................................
rc = multiplexGetTempname(pOrigVfs, pOrigVfs->mxPathname, gMultiplex.zName);
zName = gMultiplex.zName;
}
if( rc==SQLITE_OK ){
/* allocate space for group */
nName = multiplexStrlen30(zName);
sz = sizeof(multiplexGroup) /* multiplexGroup */
+ (sizeof(sqlite3_file *)*SQLITE_MULTIPLEX_MAX_CHUNKS) /* pReal[] */
+ (pOrigVfs->szOsFile*SQLITE_MULTIPLEX_MAX_CHUNKS) /* *pReal */
+ SQLITE_MULTIPLEX_MAX_CHUNKS /* bOpen[] */
+ nName + 1; /* zName */
#ifndef SQLITE_MULTIPLEX_EXT_OVWR
sz += SQLITE_MULTIPLEX_EXT_SZ;
assert(nName+SQLITE_MULTIPLEX_EXT_SZ < pOrigVfs->mxPathname);
................................................................................
){
multiplexConn *p = (multiplexConn*)pConn;
multiplexGroup *pGroup = p->pGroup;
int rc = SQLITE_OK;
multiplexEnter();
if( !pGroup->bEnabled ){
sqlite3_file *pSubOpen = multiplexSubOpen(p, 0, &rc, NULL);
rc = ( !pSubOpen ) ? SQLITE_IOERR_READ : pSubOpen->pMethods->xRead(pSubOpen, pBuf, iAmt, iOfst);
}else{
while( iAmt > 0 ){
int i = (int)(iOfst / pGroup->nChunkSize);
sqlite3_file *pSubOpen = multiplexSubOpen(p, i, &rc, NULL);
if( pSubOpen ){
int extra = ((int)(iOfst % pGroup->nChunkSize) + iAmt) - pGroup->nChunkSize;
if( extra<0 ) extra = 0;
iAmt -= extra;
rc = pSubOpen->pMethods->xRead(pSubOpen, pBuf, iAmt, iOfst % pGroup->nChunkSize);
if( rc!=SQLITE_OK ) break;
pBuf = (char *)pBuf + iAmt;
iOfst += iAmt;
iAmt = extra;
}else{
rc = SQLITE_IOERR_READ;
break;
................................................................................
){
multiplexConn *p = (multiplexConn*)pConn;
multiplexGroup *pGroup = p->pGroup;
int rc = SQLITE_OK;
multiplexEnter();
if( !pGroup->bEnabled ){
sqlite3_file *pSubOpen = multiplexSubOpen(p, 0, &rc, NULL);
rc = ( !pSubOpen ) ? SQLITE_IOERR_WRITE : pSubOpen->pMethods->xWrite(pSubOpen, pBuf, iAmt, iOfst);
}else{
while( iAmt > 0 ){
int i = (int)(iOfst / pGroup->nChunkSize);
sqlite3_file *pSubOpen = multiplexSubOpen(p, i, &rc, NULL);
if( pSubOpen ){
int extra = ((int)(iOfst % pGroup->nChunkSize) + iAmt) - pGroup->nChunkSize;
if( extra<0 ) extra = 0;
iAmt -= extra;
rc = pSubOpen->pMethods->xWrite(pSubOpen, pBuf, iAmt, iOfst % pGroup->nChunkSize);
if( rc!=SQLITE_OK ) break;
pBuf = (char *)pBuf + iAmt;
iOfst += iAmt;
iAmt = extra;
}else{
rc = SQLITE_IOERR_WRITE;
break;
................................................................................
static int multiplexTruncate(sqlite3_file *pConn, sqlite3_int64 size){
multiplexConn *p = (multiplexConn*)pConn;
multiplexGroup *pGroup = p->pGroup;
int rc = SQLITE_OK;
multiplexEnter();
if( !pGroup->bEnabled ){
sqlite3_file *pSubOpen = multiplexSubOpen(p, 0, &rc, NULL);
rc = ( !pSubOpen ) ? SQLITE_IOERR_TRUNCATE : pSubOpen->pMethods->xTruncate(pSubOpen, size);
}else{
int rc2;
int i;
sqlite3_file *pSubOpen;
sqlite3_vfs *pOrigVfs = gMultiplex.pOrigVfs; /* Real VFS */
memcpy(gMultiplex.zName, pGroup->zName, pGroup->nName+1);
/* delete the chunks above the truncate limit */
................................................................................
sqlite3_snprintf(SQLITE_MULTIPLEX_EXT_SZ+1,
gMultiplex.zName+pGroup->nName,
SQLITE_MULTIPLEX_EXT_FMT, i);
#endif
rc2 = pOrigVfs->xDelete(pOrigVfs, gMultiplex.zName, 0);
if( rc2!=SQLITE_OK ) rc = SQLITE_IOERR_TRUNCATE;
}
pSubOpen = multiplexSubOpen(p, (int)(size / pGroup->nChunkSize), &rc2, NULL);
if( pSubOpen ){
rc2 = pSubOpen->pMethods->xTruncate(pSubOpen, size % pGroup->nChunkSize);
if( rc2!=SQLITE_OK ) rc = rc2;
}else{
rc = SQLITE_IOERR_TRUNCATE;
}
}
................................................................................
multiplexGroup *pGroup = p->pGroup;
int rc = SQLITE_OK;
int rc2;
int i;
multiplexEnter();
if( !pGroup->bEnabled ){
sqlite3_file *pSubOpen = multiplexSubOpen(p, 0, &rc, NULL);
rc = ( !pSubOpen ) ? SQLITE_IOERR_FSTAT : pSubOpen->pMethods->xFileSize(pSubOpen, pSize);
}else{
*pSize = 0;
for(i=0; i<pGroup->nMaxChunks; i++){
sqlite3_file *pSubOpen = NULL;
/* if not opened already, check to see if the chunk exists */
if( pGroup->bOpen[i] ){
pSubOpen = pGroup->pReal[i];
................................................................................
int bExtend, /* True to extend file if necessary */
void volatile **pp /* OUT: Mapped memory */
){
multiplexConn *p = (multiplexConn*)pConn;
int rc;
sqlite3_file *pSubOpen = multiplexSubOpen(p, 0, &rc, NULL);
if( pSubOpen ){
return pSubOpen->pMethods->xShmMap(pSubOpen, iRegion, szRegion, bExtend, pp);
}
return SQLITE_IOERR;
}
/* Pass xShmLock requests through to the original VFS unchanged.
*/
static int multiplexShmLock(
................................................................................
gMultiplex.sIoMethodsV1.xSync = multiplexSync;
gMultiplex.sIoMethodsV1.xFileSize = multiplexFileSize;
gMultiplex.sIoMethodsV1.xLock = multiplexLock;
gMultiplex.sIoMethodsV1.xUnlock = multiplexUnlock;
gMultiplex.sIoMethodsV1.xCheckReservedLock = multiplexCheckReservedLock;
gMultiplex.sIoMethodsV1.xFileControl = multiplexFileControl;
gMultiplex.sIoMethodsV1.xSectorSize = multiplexSectorSize;
gMultiplex.sIoMethodsV1.xDeviceCharacteristics = multiplexDeviceCharacteristics;
gMultiplex.sIoMethodsV2 = gMultiplex.sIoMethodsV1;
gMultiplex.sIoMethodsV2.iVersion = 2;
gMultiplex.sIoMethodsV2.xShmMap = multiplexShmMap;
gMultiplex.sIoMethodsV2.xShmLock = multiplexShmLock;
gMultiplex.sIoMethodsV2.xShmBarrier = multiplexShmBarrier;
gMultiplex.sIoMethodsV2.xShmUnmap = multiplexShmUnmap;
sqlite3_vfs_register(&gMultiplex.sThisVfs, makeDefault);
|
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j = multiplexStrlen30(zBuf);
if( (j + 8 + 1 + 3 + 1) <= nBuf ){
/* Make 3 attempts to generate a unique name. */
do {
attempts++;
sqlite3_randomness(8, &zBuf[j]);
for(i=0; i<8; i++){
unsigned char uc = (unsigned char)zBuf[j+i];
zBuf[j+i] = (char)zChars[uc%(sizeof(zChars)-1)];
}
memcpy(&zBuf[j+i], ".tmp", 5);
rc = pOrigVfs->xAccess(pOrigVfs, zBuf, SQLITE_ACCESS_EXISTS, &exists);
} while ( (rc==SQLITE_OK) && exists && (attempts<3) );
if( rc==SQLITE_OK && exists ){
rc = SQLITE_ERROR;
}
................................................................................
return rc;
}
/* Translate an sqlite3_file* that is really a multiplexGroup* into
** the sqlite3_file* for the underlying original VFS.
*/
static sqlite3_file *multiplexSubOpen(
multiplexConn *pConn,
int iChunk,
int *rc,
int *pOutFlags
){
multiplexGroup *pGroup = pConn->pGroup;
sqlite3_vfs *pOrigVfs = gMultiplex.pOrigVfs; /* Real VFS */
if( iChunk<pGroup->nMaxChunks ){
sqlite3_file *pSubOpen = pGroup->pReal[iChunk]; /* Real file descriptor */
if( !pGroup->bOpen[iChunk] ){
memcpy(gMultiplex.zName, pGroup->zName, pGroup->nName+1);
if( iChunk ){
#ifdef SQLITE_MULTIPLEX_EXT_OVWR
sqlite3_snprintf(SQLITE_MULTIPLEX_EXT_SZ+1,
gMultiplex.zName+pGroup->nName-SQLITE_MULTIPLEX_EXT_SZ,
SQLITE_MULTIPLEX_EXT_FMT, iChunk);
#else
sqlite3_snprintf(SQLITE_MULTIPLEX_EXT_SZ+1,
gMultiplex.zName+pGroup->nName,
SQLITE_MULTIPLEX_EXT_FMT, iChunk);
#endif
}
*rc = pOrigVfs->xOpen(pOrigVfs, gMultiplex.zName, pSubOpen,
pGroup->flags, pOutFlags);
if( *rc==SQLITE_OK ){
pGroup->bOpen[iChunk] = -1;
return pSubOpen;
}
return NULL;
}
*rc = SQLITE_OK;
................................................................................
static int multiplexOpen(
sqlite3_vfs *pVfs, /* The multiplex VFS */
const char *zName, /* Name of file to be opened */
sqlite3_file *pConn, /* Fill in this file descriptor */
int flags, /* Flags to control the opening */
int *pOutFlags /* Flags showing results of opening */
){
int rc = SQLITE_OK; /* Result code */
multiplexConn *pMultiplexOpen; /* The new multiplex file descriptor */
multiplexGroup *pGroup; /* Corresponding multiplexGroup object */
sqlite3_file *pSubOpen; /* Real file descriptor */
sqlite3_vfs *pOrigVfs = gMultiplex.pOrigVfs; /* Real VFS */
int nName;
int i;
int sz;
UNUSED_PARAMETER(pVfs);
................................................................................
rc = multiplexGetTempname(pOrigVfs, pOrigVfs->mxPathname, gMultiplex.zName);
zName = gMultiplex.zName;
}
if( rc==SQLITE_OK ){
/* allocate space for group */
nName = multiplexStrlen30(zName);
sz = sizeof(multiplexGroup) /* multiplexGroup */
+ (sizeof(sqlite3_file *)*SQLITE_MULTIPLEX_MAX_CHUNKS) /* pReal[] */
+ (pOrigVfs->szOsFile*SQLITE_MULTIPLEX_MAX_CHUNKS) /* *pReal */
+ SQLITE_MULTIPLEX_MAX_CHUNKS /* bOpen[] */
+ nName + 1; /* zName */
#ifndef SQLITE_MULTIPLEX_EXT_OVWR
sz += SQLITE_MULTIPLEX_EXT_SZ;
assert(nName+SQLITE_MULTIPLEX_EXT_SZ < pOrigVfs->mxPathname);
................................................................................
){
multiplexConn *p = (multiplexConn*)pConn;
multiplexGroup *pGroup = p->pGroup;
int rc = SQLITE_OK;
multiplexEnter();
if( !pGroup->bEnabled ){
sqlite3_file *pSubOpen = multiplexSubOpen(p, 0, &rc, NULL);
if( !pSubOpen ){
rc = SQLITE_IOERR_READ;
}else{
rc = pSubOpen->pMethods->xRead(pSubOpen, pBuf, iAmt, iOfst);
}
}else{
while( iAmt > 0 ){
int i = (int)(iOfst / pGroup->nChunkSize);
sqlite3_file *pSubOpen = multiplexSubOpen(p, i, &rc, NULL);
if( pSubOpen ){
int extra = ((int)(iOfst % pGroup->nChunkSize) + iAmt) -
pGroup->nChunkSize;
if( extra<0 ) extra = 0;
iAmt -= extra;
rc = pSubOpen->pMethods->xRead(pSubOpen, pBuf, iAmt,
iOfst % pGroup->nChunkSize);
if( rc!=SQLITE_OK ) break;
pBuf = (char *)pBuf + iAmt;
iOfst += iAmt;
iAmt = extra;
}else{
rc = SQLITE_IOERR_READ;
break;
................................................................................
){
multiplexConn *p = (multiplexConn*)pConn;
multiplexGroup *pGroup = p->pGroup;
int rc = SQLITE_OK;
multiplexEnter();
if( !pGroup->bEnabled ){
sqlite3_file *pSubOpen = multiplexSubOpen(p, 0, &rc, NULL);
if( pSubOpen==0 ){
rc = SQLITE_IOERR_WRITE;
}else{
rc = pSubOpen->pMethods->xWrite(pSubOpen, pBuf, iAmt, iOfst);
}
}else{
while( iAmt > 0 ){
int i = (int)(iOfst / pGroup->nChunkSize);
sqlite3_file *pSubOpen = multiplexSubOpen(p, i, &rc, NULL);
if( pSubOpen ){
int extra = ((int)(iOfst % pGroup->nChunkSize) + iAmt) -
pGroup->nChunkSize;
if( extra<0 ) extra = 0;
iAmt -= extra;
rc = pSubOpen->pMethods->xWrite(pSubOpen, pBuf, iAmt,
iOfst % pGroup->nChunkSize);
if( rc!=SQLITE_OK ) break;
pBuf = (char *)pBuf + iAmt;
iOfst += iAmt;
iAmt = extra;
}else{
rc = SQLITE_IOERR_WRITE;
break;
................................................................................
static int multiplexTruncate(sqlite3_file *pConn, sqlite3_int64 size){
multiplexConn *p = (multiplexConn*)pConn;
multiplexGroup *pGroup = p->pGroup;
int rc = SQLITE_OK;
multiplexEnter();
if( !pGroup->bEnabled ){
sqlite3_file *pSubOpen = multiplexSubOpen(p, 0, &rc, NULL);
if( pSubOpen==0 ){
rc = SQLITE_IOERR_TRUNCATE;
}else{
rc = pSubOpen->pMethods->xTruncate(pSubOpen, size);
}
}else{
int rc2;
int i;
sqlite3_file *pSubOpen;
sqlite3_vfs *pOrigVfs = gMultiplex.pOrigVfs; /* Real VFS */
memcpy(gMultiplex.zName, pGroup->zName, pGroup->nName+1);
/* delete the chunks above the truncate limit */
................................................................................
sqlite3_snprintf(SQLITE_MULTIPLEX_EXT_SZ+1,
gMultiplex.zName+pGroup->nName,
SQLITE_MULTIPLEX_EXT_FMT, i);
#endif
rc2 = pOrigVfs->xDelete(pOrigVfs, gMultiplex.zName, 0);
if( rc2!=SQLITE_OK ) rc = SQLITE_IOERR_TRUNCATE;
}
pSubOpen = multiplexSubOpen(p, (int)(size/pGroup->nChunkSize), &rc2, NULL);
if( pSubOpen ){
rc2 = pSubOpen->pMethods->xTruncate(pSubOpen, size % pGroup->nChunkSize);
if( rc2!=SQLITE_OK ) rc = rc2;
}else{
rc = SQLITE_IOERR_TRUNCATE;
}
}
................................................................................
multiplexGroup *pGroup = p->pGroup;
int rc = SQLITE_OK;
int rc2;
int i;
multiplexEnter();
if( !pGroup->bEnabled ){
sqlite3_file *pSubOpen = multiplexSubOpen(p, 0, &rc, NULL);
if( pSubOpen==0 ){
rc = SQLITE_IOERR_FSTAT;
}else{
rc = pSubOpen->pMethods->xFileSize(pSubOpen, pSize);
}
}else{
*pSize = 0;
for(i=0; i<pGroup->nMaxChunks; i++){
sqlite3_file *pSubOpen = NULL;
/* if not opened already, check to see if the chunk exists */
if( pGroup->bOpen[i] ){
pSubOpen = pGroup->pReal[i];
................................................................................
int bExtend, /* True to extend file if necessary */
void volatile **pp /* OUT: Mapped memory */
){
multiplexConn *p = (multiplexConn*)pConn;
int rc;
sqlite3_file *pSubOpen = multiplexSubOpen(p, 0, &rc, NULL);
if( pSubOpen ){
return pSubOpen->pMethods->xShmMap(pSubOpen, iRegion, szRegion, bExtend,pp);
}
return SQLITE_IOERR;
}
/* Pass xShmLock requests through to the original VFS unchanged.
*/
static int multiplexShmLock(
................................................................................
gMultiplex.sIoMethodsV1.xSync = multiplexSync;
gMultiplex.sIoMethodsV1.xFileSize = multiplexFileSize;
gMultiplex.sIoMethodsV1.xLock = multiplexLock;
gMultiplex.sIoMethodsV1.xUnlock = multiplexUnlock;
gMultiplex.sIoMethodsV1.xCheckReservedLock = multiplexCheckReservedLock;
gMultiplex.sIoMethodsV1.xFileControl = multiplexFileControl;
gMultiplex.sIoMethodsV1.xSectorSize = multiplexSectorSize;
gMultiplex.sIoMethodsV1.xDeviceCharacteristics =
multiplexDeviceCharacteristics;
gMultiplex.sIoMethodsV2 = gMultiplex.sIoMethodsV1;
gMultiplex.sIoMethodsV2.iVersion = 2;
gMultiplex.sIoMethodsV2.xShmMap = multiplexShmMap;
gMultiplex.sIoMethodsV2.xShmLock = multiplexShmLock;
gMultiplex.sIoMethodsV2.xShmBarrier = multiplexShmBarrier;
gMultiplex.sIoMethodsV2.xShmUnmap = multiplexShmUnmap;
sqlite3_vfs_register(&gMultiplex.sThisVfs, makeDefault);
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