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Make the test_async backend work again. (CVS 4293)

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FossilOrigin-Name: 04167483aad42d319393e8caf470d8de11e468d8
This commit is contained in:
danielk1977
2007-08-25 12:29:30 +00:00
parent dc3060fea3
commit 0e87b70100
5 changed files with 326 additions and 364 deletions
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18
manifest
View File

@ -1,5 +1,5 @@
C Bug\sfix\sin\sthe\simplementation\sof\srecursive\smutexes\susing\snon-recursive\npthreads\smutexes.\s\sTicket\s#2588.\s(CVS\s4292)
D 2007-08-25T03:59:09
C Make\sthe\stest_async\sbackend\swork\sagain.\s(CVS\s4293)
D 2007-08-25T12:29:30
F Makefile.in 938f2769921fa1b30c633548f153804021eb1512
F Makefile.linux-gcc 65241babba6faf1152bf86574477baab19190499
F README 9c4e2d6706bdcc3efdd773ce752a8cdab4f90028
@ -136,11 +136,11 @@ F src/test2.c 4f742e99ed1bea5c14692f627bdb59a146f30504
F src/test3.c 637824fa560f9a4ffcec6b262febb0f57f400487
F src/test4.c c2c0f5dc907f1346f5d4b65eb5799f11eb9e4071
F src/test5.c 3a6a5717a149d7ca2e6d14f5be72cf7555d54dc4
F src/test6.c 7007b3941ade02f51242ae898b5b9646d2164773
F src/test6.c a6223d9d938aba83f20611a2c01680d8043cd2f7
F src/test7.c a9d509d0e9ad214b4772696f49f6e61be26213d1
F src/test8.c e6a543c8b248efe120ae33a6859fcd55dcf46a96
F src/test9.c b46c8fe02ac7cca1a7316436d8d38d50c66f4b2f
F src/test_async.c 9f3ab66e848930d1c3a7bc2dde77b9b643f6e4ba
F src/test_async.c 12ff3db0e052f561596d4dbdd29272f28b25060d
F src/test_autoext.c 855157d97aa28cf84233847548bfacda21807436
F src/test_btree.c c1308ba0b88ab577fa56c9e493a09829dfcded9c
F src/test_config.c f0b911bb615d93a192647e76910dce65cbbcf3ad
@ -176,7 +176,7 @@ F test/alter3.test a6eec8f454be9b6ce73d8d7dc711453675a10ce7
F test/altermalloc.test 19323e0f452834044c27a54c6e78554d706de7ba
F test/analyze.test 2f55535aa335785db1a2f97d3f3831c16c09f8b0
F test/async.test 464dc7c7ccb144e8c82ecca429e6d7cd1c96bd6e
F test/async2.test 81e4a1fd010c903eb3b763fdb4c4cad7a99afb14
F test/async2.test 32f73280ec36cf426b21f9da6adee614cc137986
F test/attach.test cf289abdb120053136649efd1306ab9d47fa41b2
F test/attach2.test 78bc1a25ea8785c7571b44f5947ada2bd5d78127
F test/attach3.test eafcafb107585aecc2ed1569a77914138eef46a9
@ -561,7 +561,7 @@ F www/tclsqlite.tcl 8be95ee6dba05eabcd27a9d91331c803f2ce2130
F www/vdbe.tcl 87a31ace769f20d3627a64fa1fade7fed47b90d0
F www/version3.tcl 890248cf7b70e60c383b0e84d77d5132b3ead42b
F www/whentouse.tcl fc46eae081251c3c181bd79c5faef8195d7991a5
P e144b81f699ca991cc4fa12a487156391db0b367
R e4459c3682ecfd854817ac4629de6e06
U drh
Z 31776312f0c60a3baebc711d0ab05f9b
P 7d24c3a5a7641df2bbb8c91a0bc5aa75c96a73fe
R 2cc75c2f206441da9358edc45d8dfd5c
U danielk1977
Z aea3dbc69c22966552218a64ff9753b2

2
manifest.uuid
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@ -1 +1 @@
7d24c3a5a7641df2bbb8c91a0bc5aa75c96a73fe
04167483aad42d319393e8caf470d8de11e468d8

24
src/test6.c
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@ -517,8 +517,7 @@ struct crashAppData {
};
/*
** Open a crash-file file handle. The vfs pVfs is used to open
** the underlying real file.
** Open a crash-file file handle.
**
** The caller will have allocated pVfs->szOsFile bytes of space
** at pFile. This file uses this space for the CrashFile structure
@ -585,6 +584,18 @@ static void *cfDlOpen(sqlite3_vfs *pCfVfs, const char *zPath){
sqlite3_vfs *pVfs = (sqlite3_vfs *)pCfVfs->pAppData;
return pVfs->xDlOpen(pVfs, zPath);
}
static void cfDlError(sqlite3_vfs *pCfVfs, int nByte, char *zErrMsg){
sqlite3_vfs *pVfs = (sqlite3_vfs *)pCfVfs->pAppData;
pVfs->xDlError(pVfs, nByte, zErrMsg);
}
static void *cfDlSym(sqlite3_vfs *pCfVfs, void *pHandle, const char *zSymbol){
sqlite3_vfs *pVfs = (sqlite3_vfs *)pCfVfs->pAppData;
return pVfs->xDlSym(pVfs, pHandle, zSymbol);
}
static void cfDlClose(sqlite3_vfs *pCfVfs, void *pHandle){
sqlite3_vfs *pVfs = (sqlite3_vfs *)pCfVfs->pAppData;
pVfs->xDlClose(pVfs, pHandle);
}
static int cfRandomness(sqlite3_vfs *pCfVfs, int nByte, char *zBufOut){
sqlite3_vfs *pVfs = (sqlite3_vfs *)pCfVfs->pAppData;
return pVfs->xRandomness(pVfs, nByte, zBufOut);
@ -732,9 +743,9 @@ static int crashParamsObjCmd(
cfGetTempName, /* xGetTempName */
cfFullPathname, /* xFullPathname */
cfDlOpen, /* xDlOpen */
0, /* xDlError */
0, /* xDlSym */
0, /* xDlClose */
cfDlError, /* xDlError */
cfDlSym, /* xDlSym */
cfDlClose, /* xDlClose */
cfRandomness, /* xRandomness */
cfSleep, /* xSleep */
cfCurrentTime /* xCurrentTime */
@ -743,9 +754,6 @@ static int crashParamsObjCmd(
if( crashVfs.pAppData==0 ){
sqlite3_vfs *pOriginalVfs = sqlite3_vfs_find(0);
crashVfs.xDlError = pOriginalVfs->xDlError;
crashVfs.xDlSym = pOriginalVfs->xDlSym;
crashVfs.xDlClose = pOriginalVfs->xDlClose;
crashVfs.mxPathname = pOriginalVfs->mxPathname;
crashVfs.pAppData = (void *)pOriginalVfs;
crashVfs.szOsFile = sizeof(CrashFile) + pOriginalVfs->szOsFile;

607
src/test_async.c
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@ -75,12 +75,9 @@
/*
** This test uses pthreads and hence only works on unix and with
** a threadsafe build of SQLite. It also requires that the redefinable
** I/O feature of SQLite be turned on. This feature is turned off by
** default. If a required element is missing, almost all of the code
** in this file is commented out.
** a threadsafe build of SQLite.
*/
#if OS_UNIX && SQLITE_THREADSAFE && defined(SQLITE_ENABLE_REDEF_IO)
#if OS_UNIX && SQLITE_THREADSAFE
/*
** This demo uses pthreads. If you do not have a pthreads implementation
@ -97,6 +94,7 @@
/* Forward references */
typedef struct AsyncWrite AsyncWrite;
typedef struct AsyncFile AsyncFile;
typedef struct AsyncFileData AsyncFileData;
/* Enable for debugging */
static int sqlite3async_trace = 0;
@ -280,8 +278,7 @@ static const char *azOpcodeName[] = {
** nByte -> Number of bytes of data to write (pointed to by zBuf).
**
** ASYNC_SYNC:
** iOffset -> Unused.
** nByte -> Value of "fullsync" flag to pass to sqlite3OsSync().
** nByte -> flags to pass to sqlite3OsSync().
**
** ASYNC_TRUNCATE:
** iOffset -> Size to truncate file to.
@ -301,7 +298,7 @@ static const char *azOpcodeName[] = {
**
**
** ASYNC_DELETE:
** iOffset -> Unused.
** iOffset -> Contains the "syncDir" flag.
** nByte -> Number of bytes of zBuf points to (file name).
**
** ASYNC_OPENEXCLUSIVE:
@ -315,7 +312,7 @@ static const char *azOpcodeName[] = {
** structure.
*/
struct AsyncWrite {
AsyncFile *pFile; /* File to write data to or sync */
AsyncFileData *pFileData; /* File to write data to or sync */
int op; /* One of ASYNC_xxx etc. */
i64 iOffset; /* See above */
int nByte; /* See above */
@ -324,15 +321,25 @@ struct AsyncWrite {
};
/*
** The AsyncFile structure is a subclass of OsFile used for asynchronous IO.
** The AsyncFile structure is a subclass of sqlite3_file used for
** asynchronous IO.
**
** All of the actual data for the structure is stored in the structure
** pointed to by AsyncFile.pData, which is allocated as part of the
** sqlite3OsOpen() using sqlite3_malloc(). The reason for this is that the
** lifetime of the AsyncFile structure is ended by the caller after OsClose()
** is called, but the data in AsyncFileData may be required by the
** writer thread after that point.
*/
struct AsyncFile {
IoMethod *pMethod; /* Must be first */
i64 iOffset; /* Current seek() offset in file */
sqlite3_io_methods *pMethod;
AsyncFileData *pData;
};
struct AsyncFileData {
char *zName; /* Underlying OS filename - used for debugging */
int nName; /* Number of characters in zName */
OsFile *pBaseRead; /* Read handle to the underlying Os file */
OsFile *pBaseWrite; /* Write handle to the underlying Os file */
sqlite3_file *pBaseRead; /* Read handle to the underlying Os file */
sqlite3_file *pBaseWrite; /* Write handle to the underlying Os file */
};
/*
@ -359,7 +366,7 @@ static void addAsyncWrite(AsyncWrite *pWrite){
}
async.pQueueLast = pWrite;
ASYNC_TRACE(("PUSH %p (%s %s %d)\n", pWrite, azOpcodeName[pWrite->op],
pWrite->pFile ? pWrite->pFile->zName : "-", pWrite->iOffset));
pWrite->pFileData ? pWrite->pFileData->zName : "-", pWrite->iOffset));
if( pWrite->op==ASYNC_CLOSE ){
async.nFile--;
@ -394,7 +401,7 @@ static void incrOpenFileCount(){
** structure and insert it (via addAsyncWrite() ) into the global list.
*/
static int addNewAsyncWrite(
AsyncFile *pFile,
AsyncFileData *pFileData,
int op,
i64 iOffset,
int nByte,
@ -411,7 +418,7 @@ static int addNewAsyncWrite(
p->op = op;
p->iOffset = iOffset;
p->nByte = nByte;
p->pFile = pFile;
p->pFileData = pFileData;
p->pNext = 0;
if( zByte ){
p->zBuf = (char *)&p[1];
@ -427,8 +434,9 @@ static int addNewAsyncWrite(
** Close the file. This just adds an entry to the write-op list, the file is
** not actually closed.
*/
static int asyncClose(OsFile **pId){
return addNewAsyncWrite((AsyncFile *)*pId, ASYNC_CLOSE, 0, 0, 0);
static int asyncClose(sqlite3_file *pFile){
AsyncFileData *p = ((AsyncFile *)pFile)->pData;
return addNewAsyncWrite(p, ASYNC_CLOSE, 0, 0, 0);
}
/*
@ -437,45 +445,9 @@ static int asyncClose(OsFile **pId){
** the global AsyncWrite list. Either SQLITE_OK or SQLITE_NOMEM may be
** returned.
*/
static int asyncWrite(OsFile *id, const void *pBuf, int amt){
AsyncFile *pFile = (AsyncFile *)id;
int rc = addNewAsyncWrite(pFile, ASYNC_WRITE, pFile->iOffset, amt, pBuf);
pFile->iOffset += (i64)amt;
return rc;
}
/*
** Truncate the file to nByte bytes in length. This just adds an entry to
** the write-op list, no IO actually takes place.
*/
static int asyncTruncate(OsFile *id, i64 nByte){
return addNewAsyncWrite((AsyncFile *)id, ASYNC_TRUNCATE, nByte, 0, 0);
}
/*
** Open the directory identified by zName and associate it with the
** specified file. This just adds an entry to the write-op list, the
** directory is opened later by sqlite3_async_flush().
*/
static int asyncOpenDirectory(OsFile *id, const char *zName){
AsyncFile *pFile = (AsyncFile *)id;
return addNewAsyncWrite(pFile, ASYNC_OPENDIRECTORY, 0, strlen(zName)+1,zName);
}
/*
** Sync the file. This just adds an entry to the write-op list, the
** sync() is done later by sqlite3_async_flush().
*/
static int asyncSync(OsFile *id, int fullsync){
return addNewAsyncWrite((AsyncFile *)id, ASYNC_SYNC, 0, fullsync, 0);
}
/*
** Set (or clear) the full-sync flag on the underlying file. This operation
** is queued and performed later by sqlite3_async_flush().
*/
static void asyncSetFullSync(OsFile *id, int value){
addNewAsyncWrite((AsyncFile *)id, ASYNC_SETFULLSYNC, 0, value, 0);
static int asyncWrite(sqlite3_file *pFile, const void *pBuf, int amt, i64 iOff){
AsyncFileData *p = ((AsyncFile *)pFile)->pData;
return addNewAsyncWrite(p, ASYNC_WRITE, iOff, amt, pBuf);
}
/*
@ -485,15 +457,15 @@ static void asyncSetFullSync(OsFile *id, int value){
**
** This method holds the mutex from start to finish.
*/
static int asyncRead(OsFile *id, void *obuf, int amt){
static int asyncRead(sqlite3_file *pFile, void *zOut, int iAmt, i64 iOffset){
AsyncFileData *p = ((AsyncFile *)pFile)->pData;
int rc = SQLITE_OK;
i64 filesize;
int nRead;
AsyncFile *pFile = (AsyncFile *)id;
OsFile *pBase = pFile->pBaseRead;
sqlite3_file *pBase = p->pBaseRead;
/* If an I/O error has previously occurred on this file, then all
** subsequent operations fail.
/* If an I/O error has previously occurred in this virtual file
** system, then all subsequent operations fail.
*/
if( async.ioError!=SQLITE_OK ){
return async.ioError;
@ -502,44 +474,37 @@ static int asyncRead(OsFile *id, void *obuf, int amt){
/* Grab the write queue mutex for the duration of the call */
pthread_mutex_lock(&async.queueMutex);
if( pBase ){
if( pBase->pMethods ){
rc = sqlite3OsFileSize(pBase, &filesize);
if( rc!=SQLITE_OK ){
goto asyncread_out;
}
rc = sqlite3OsSeek(pBase, pFile->iOffset);
if( rc!=SQLITE_OK ){
goto asyncread_out;
}
nRead = MIN(filesize - pFile->iOffset, amt);
nRead = MIN(filesize - iOffset, iAmt);
if( nRead>0 ){
rc = sqlite3OsRead(pBase, obuf, nRead);
ASYNC_TRACE(("READ %s %d bytes at %d\n", pFile->zName, nRead, pFile->iOffset));
rc = sqlite3OsRead(pBase, zOut, nRead, iOffset);
ASYNC_TRACE(("READ %s %d bytes at %d\n", p->zName, nRead, iOffset));
}
}
if( rc==SQLITE_OK ){
AsyncWrite *p;
i64 iOffset = pFile->iOffset; /* Current seek offset */
AsyncWrite *pWrite;
for(p=async.pQueueFirst; p; p = p->pNext){
if( p->pFile==pFile && p->op==ASYNC_WRITE ){
int iBeginOut = (p->iOffset - iOffset);
for(pWrite=async.pQueueFirst; pWrite; pWrite = pWrite->pNext){
if( pWrite->pFileData==p && pWrite->op==ASYNC_WRITE ){
int iBeginOut = (pWrite->iOffset-iOffset);
int iBeginIn = -iBeginOut;
int nCopy;
if( iBeginIn<0 ) iBeginIn = 0;
if( iBeginOut<0 ) iBeginOut = 0;
nCopy = MIN(p->nByte-iBeginIn, amt-iBeginOut);
nCopy = MIN(pWrite->nByte-iBeginIn, iAmt-iBeginOut);
if( nCopy>0 ){
memcpy(&((char *)obuf)[iBeginOut], &p->zBuf[iBeginIn], nCopy);
memcpy(&((char *)zOut)[iBeginOut], &pWrite->zBuf[iBeginIn], nCopy);
ASYNC_TRACE(("OVERREAD %d bytes at %d\n", nCopy, iBeginOut+iOffset));
}
}
}
pFile->iOffset += (i64)amt;
}
asyncread_out:
@ -548,14 +513,21 @@ asyncread_out:
}
/*
** Seek to the specified offset. This just adjusts the AsyncFile.iOffset
** variable - calling seek() on the underlying file is defered until the
** next read() or write() operation.
** Truncate the file to nByte bytes in length. This just adds an entry to
** the write-op list, no IO actually takes place.
*/
static int asyncSeek(OsFile *id, i64 offset){
AsyncFile *pFile = (AsyncFile *)id;
pFile->iOffset = offset;
return SQLITE_OK;
static int asyncTruncate(sqlite3_file *pFile, i64 nByte){
AsyncFileData *p = ((AsyncFile *)pFile)->pData;
return addNewAsyncWrite(p, ASYNC_TRUNCATE, nByte, 0, 0);
}
/*
** Sync the file. This just adds an entry to the write-op list, the
** sync() is done later by sqlite3_async_flush().
*/
static int asyncSync(sqlite3_file *pFile, int flags){
AsyncFileData *p = ((AsyncFile *)pFile)->pData;
return addNewAsyncWrite(p, ASYNC_SYNC, 0, flags, 0);
}
/*
@ -565,10 +537,11 @@ static int asyncSeek(OsFile *id, i64 offset){
**
** This method holds the mutex from start to finish.
*/
int asyncFileSize(OsFile *id, i64 *pSize){
int asyncFileSize(sqlite3_file *pFile, i64 *piSize){
AsyncFileData *p = ((AsyncFile *)pFile)->pData;
int rc = SQLITE_OK;
i64 s = 0;
OsFile *pBase;
sqlite3_file *pBase;
pthread_mutex_lock(&async.queueMutex);
@ -577,39 +550,31 @@ int asyncFileSize(OsFile *id, i64 *pSize){
** must be in the write-op queue anyway, so we can omit reading from the
** file-system.
*/
pBase = ((AsyncFile *)id)->pBaseRead;
if( pBase ){
pBase = p->pBaseRead;
if( pBase->pMethods ){
rc = sqlite3OsFileSize(pBase, &s);
}
if( rc==SQLITE_OK ){
AsyncWrite *p;
for(p=async.pQueueFirst; p; p = p->pNext){
if( p->pFile==(AsyncFile *)id ){
switch( p->op ){
AsyncWrite *pWrite;
for(pWrite=async.pQueueFirst; pWrite; pWrite = pWrite->pNext){
if( pWrite->pFileData==p ){
switch( pWrite->op ){
case ASYNC_WRITE:
s = MAX(p->iOffset + (i64)(p->nByte), s);
s = MAX(pWrite->iOffset + (i64)(pWrite->nByte), s);
break;
case ASYNC_TRUNCATE:
s = MIN(s, p->iOffset);
s = MIN(s, pWrite->iOffset);
break;
}
}
}
*pSize = s;
*piSize = s;
}
pthread_mutex_unlock(&async.queueMutex);
return rc;
}
/*
** Return the operating system file handle. This is only used for debugging
** at the moment anyway.
*/
static int asyncFileHandle(OsFile *id){
return sqlite3OsFileHandle(((AsyncFile *)id)->pBaseRead);
}
/*
** No disk locking is performed. We keep track of locks locally in
** the async.aLock hash table. Locking should appear to work the same
@ -618,166 +583,128 @@ static int asyncFileHandle(OsFile *id){
** cannot see our internal hash table (obviously) and will thus not
** honor our locks.
*/
static int asyncLock(OsFile *id, int lockType){
AsyncFile *pFile = (AsyncFile*)id;
ASYNC_TRACE(("LOCK %d (%s)\n", lockType, pFile->zName));
static int asyncLock(sqlite3_file *pFile, int lockType){
AsyncFileData *p = ((AsyncFile *)pFile)->pData;
ASYNC_TRACE(("LOCK %d (%s)\n", lockType, p->zName));
pthread_mutex_lock(&async.lockMutex);
sqlite3HashInsert(&async.aLock, pFile->zName, pFile->nName, (void*)lockType);
sqlite3HashInsert(&async.aLock, p->zName, p->nName, (void*)lockType);
pthread_mutex_unlock(&async.lockMutex);
return SQLITE_OK;
}
static int asyncUnlock(OsFile *id, int lockType){
return asyncLock(id, lockType);
static int asyncUnlock(sqlite3_file *pFile, int lockType){
return asyncLock(pFile, lockType);
}
/*
** This function is called when the pager layer first opens a database file
** and is checking for a hot-journal.
*/
static int asyncCheckReservedLock(OsFile *id){
AsyncFile *pFile = (AsyncFile*)id;
static int asyncCheckReservedLock(sqlite3_file *pFile){
AsyncFileData *p = ((AsyncFile *)pFile)->pData;
int rc;
pthread_mutex_lock(&async.lockMutex);
rc = (int)sqlite3HashFind(&async.aLock, pFile->zName, pFile->nName);
rc = (int)sqlite3HashFind(&async.aLock, p->zName, p->nName);
pthread_mutex_unlock(&async.lockMutex);
ASYNC_TRACE(("CHECK-LOCK %d (%s)\n", rc, pFile->zName));
ASYNC_TRACE(("CHECK-LOCK %d (%s)\n", rc, p->zName));
return rc>SHARED_LOCK;
}
static int asyncSectorSize(OsFile *id){
/* TODO: This is tricky to implement, as this backend might not have
** an open file handle at this point.
*/
return 512;
/*
** This is a no-op, as the asynchronous backend does not support locking.
*/
static int asyncBreakLock(sqlite3_file *id){
return SQLITE_OK;
}
/*
** This is broken. But sqlite3OsLockState() is only used for testing anyway.
*/
static int asyncLockState(OsFile *id){
static int asyncLockState(sqlite3_file *id){
return SQLITE_OK;
}
/*
** The following variables hold pointers to the original versions of
** OS-layer interface routines that are overloaded in order to create
** the asynchronous I/O backend.
** Return the device characteristics and sector-size of the device. It
** is not tricky to implement these correctly, as this backend might
** not have an open file handle at this point.
*/
static int (*xOrigOpenReadWrite)(const char*, OsFile**, int*) = 0;
static int (*xOrigOpenExclusive)(const char*, OsFile**, int) = 0;
static int (*xOrigOpenReadOnly)(const char*, OsFile**) = 0;
static int (*xOrigDelete)(const char*) = 0;
static int (*xOrigFileExists)(const char*) = 0;
static int (*xOrigSyncDirectory)(const char*) = 0;
static int asyncSectorSize(sqlite3_file *pFile){
return 512;
}
static int asyncDeviceCharacteristics(sqlite3_file *pFile){
return 0;
}
/*
** This routine does most of the work of opening a file and building
** the OsFile structure.
** Open a file.
*/
static int asyncOpenFile(
const char *zName, /* The name of the file to be opened */
OsFile **pFile, /* Put the OsFile structure here */
OsFile *pBaseRead, /* The real OsFile from the real I/O routine */
int openForWriting /* Open a second file handle for writing if true */
static int asyncOpen(
sqlite3_vfs *pAsyncVfs,
const char *zName,
sqlite3_file *pFile,
int flags,
int *pOutFlags
){
int rc, i, n;
AsyncFile *p;
OsFile *pBaseWrite = 0;
static IoMethod iomethod = {
asyncClose,
asyncOpenDirectory,
asyncRead,
asyncWrite,
asyncSeek,
asyncTruncate,
asyncSync,
asyncSetFullSync,
asyncFileHandle,
asyncFileSize,
asyncLock,
asyncUnlock,
asyncLockState,
asyncCheckReservedLock,
asyncSectorSize,
static sqlite3_io_methods async_methods = {
1, /* iVersion */
asyncClose, /* xClose */
asyncRead, /* xRead */
asyncWrite, /* xWrite */
asyncTruncate, /* xTruncate */
asyncSync, /* xSync */
asyncFileSize, /* xFileSize */
asyncLock, /* xLock */
asyncUnlock, /* xUnlock */
asyncCheckReservedLock, /* xCheckReservedLock */
asyncBreakLock, /* xBreakLock */
asyncLockState, /* xLockState */
asyncSectorSize, /* xSectorSize */
asyncDeviceCharacteristics /* xDeviceCharacteristics */
};
if( openForWriting && SQLITE_ASYNC_TWO_FILEHANDLES ){
int dummy;
rc = xOrigOpenReadWrite(zName, &pBaseWrite, &dummy);
if( rc!=SQLITE_OK ){
goto error_out;
sqlite3_vfs *pVfs = (sqlite3_vfs *)pAsyncVfs->pAppData;
AsyncFile *p = (AsyncFile *)pFile;
int nName = strlen(zName);;
int rc;
int nByte;
AsyncFileData *pData;
nByte = (
sizeof(AsyncFileData) + /* AsyncFileData structure */
2 * pVfs->szOsFile + /* AsyncFileData.zName */
nName + 1 /* AsyncFileData.pBaseRead and pBaseWrite */
);
pData = sqlite3_malloc(nByte);
if( !pData ){
return SQLITE_NOMEM;
}
memset(pData, 0, nByte);
pData->zName = (char *)&pData[1];
pData->nName = nName;
pData->pBaseRead = (sqlite3_file *)&pData->zName[nName+1];
pData->pBaseWrite = (sqlite3_file *)&pData->zName[nName+1+pVfs->szOsFile];
memcpy(pData->zName, zName, nName+1);
if( flags&SQLITE_OPEN_EXCLUSIVE ){
rc = addNewAsyncWrite(pData, ASYNC_OPENEXCLUSIVE, (i64)flags, 0, 0);
if( pOutFlags ) *pOutFlags = flags;
}else{
rc = sqlite3OsOpen(pVfs, zName, pData->pBaseRead, flags, pOutFlags);
if( rc==SQLITE_OK && ((*pOutFlags)&SQLITE_OPEN_READWRITE) ){
rc = sqlite3OsOpen(pVfs, zName, pData->pBaseWrite, flags, 0);
}
}
n = strlen(zName);
for(i=n-1; i>=0 && zName[i]!='/'; i--){}
p = (AsyncFile *)sqlite3_malloc(sizeof(AsyncFile) + n - i);
if( !p ){
rc = SQLITE_NOMEM;
goto error_out;
}
memset(p, 0, sizeof(AsyncFile));
p->zName = (char*)&p[1];
strcpy(p->zName, &zName[i+1]);
p->nName = n - i;
p->pMethod = &iomethod;
p->pBaseRead = pBaseRead;
p->pBaseWrite = pBaseWrite;
*pFile = (OsFile *)p;
return SQLITE_OK;
error_out:
assert(!p);
sqlite3OsClose(&pBaseRead);
sqlite3OsClose(&pBaseWrite);
*pFile = 0;
return rc;
}
/*
** The async-IO backends implementation of the three functions used to open
** a file (xOpenExclusive, xOpenReadWrite and xOpenReadOnly). Most of the
** work is done in function asyncOpenFile() - see above.
*/
static int asyncOpenExclusive(const char *z, OsFile **ppFile, int delFlag){
int rc = asyncOpenFile(z, ppFile, 0, 0);
if( rc==SQLITE_OK ){
AsyncFile *pFile = (AsyncFile *)(*ppFile);
int nByte = strlen(z)+1;
i64 i = (i64)(delFlag);
rc = addNewAsyncWrite(pFile, ASYNC_OPENEXCLUSIVE, i, nByte, z);
if( rc!=SQLITE_OK ){
sqlite3_free(pFile);
*ppFile = 0;
}
}
if( rc==SQLITE_OK ){
incrOpenFileCount();
}
return rc;
}
static int asyncOpenReadOnly(const char *z, OsFile **ppFile){
OsFile *pBase = 0;
int rc = xOrigOpenReadOnly(z, &pBase);
if( rc==SQLITE_OK ){
rc = asyncOpenFile(z, ppFile, pBase, 0);
}
if( rc==SQLITE_OK ){
incrOpenFileCount();
}
return rc;
}
static int asyncOpenReadWrite(const char *z, OsFile **ppFile, int *pReadOnly){
OsFile *pBase = 0;
int rc = xOrigOpenReadWrite(z, &pBase, pReadOnly);
if( rc==SQLITE_OK ){
rc = asyncOpenFile(z, ppFile, pBase, (*pReadOnly ? 0 : 1));
}
if( rc==SQLITE_OK ){
p->pMethod = &async_methods;
p->pData = pData;
incrOpenFileCount();
}else{
sqlite3OsClose(pData->pBaseRead);
sqlite3OsClose(pData->pBaseWrite);
sqlite3_free(pData);
}
return rc;
}
@ -785,46 +712,112 @@ static int asyncOpenReadWrite(const char *z, OsFile **ppFile, int *pReadOnly){
** Implementation of sqlite3OsDelete. Add an entry to the end of the
** write-op queue to perform the delete.
*/
static int asyncDelete(const char *z){
return addNewAsyncWrite(0, ASYNC_DELETE, 0, strlen(z)+1, z);
static int asyncDelete(sqlite3_vfs *pAsyncVfs, const char *z, int syncDir){
return addNewAsyncWrite(0, ASYNC_DELETE, syncDir, strlen(z)+1, z);
}
/*
** Implementation of sqlite3OsSyncDirectory. Add an entry to the end of the
** write-op queue to perform the directory sync.
** Implementation of sqlite3OsAccess. This method holds the mutex from
** start to finish.
*/
static int asyncSyncDirectory(const char *z){
return addNewAsyncWrite(0, ASYNC_SYNCDIRECTORY, 0, strlen(z)+1, z);
}
/*
** Implementation of sqlite3OsFileExists. Return true if file 'z' exists
** in the file system.
**
** This method holds the mutex from start to finish.
*/
static int asyncFileExists(const char *z){
static int asyncAccess(sqlite3_vfs *pAsyncVfs, const char *zName, int flags){
int ret;
AsyncWrite *p;
sqlite3_vfs *pVfs = (sqlite3_vfs *)pAsyncVfs->pAppData;
assert(flags==SQLITE_ACCESS_READWRITE
|| flags==SQLITE_ACCESS_READONLY
|| flags==SQLITE_ACCESS_EXISTS
);
pthread_mutex_lock(&async.queueMutex);
/* See if the real file system contains the specified file. */
ret = xOrigFileExists(z);
ret = sqlite3OsAccess(pVfs, zName, flags);
if( flags==SQLITE_ACCESS_EXISTS ){
for(p=async.pQueueFirst; p; p = p->pNext){
if( p->op==ASYNC_DELETE && 0==strcmp(p->zBuf, z) ){
if( p->op==ASYNC_DELETE && 0==strcmp(p->zBuf, zName) ){
ret = 0;
}else if( p->op==ASYNC_OPENEXCLUSIVE && 0==strcmp(p->zBuf, z) ){
}else if( p->op==ASYNC_OPENEXCLUSIVE
&& 0==strcmp(p->pFileData->zName, zName)
){
ret = 1;
}
}
ASYNC_TRACE(("EXISTS: %s = %d\n", z, ret));
}
ASYNC_TRACE(("ACCESS(%s): %s = %d\n",
flags==SQLITE_ACCESS_READWRITE?"read-write":
flags==SQLITE_ACCESS_READONLY?"read-only":"exists"
, zName, ret)
);
pthread_mutex_unlock(&async.queueMutex);
return ret;
}
static int asyncGetTempName(sqlite3_vfs *pAsyncVfs, char *zBufOut){
sqlite3_vfs *pVfs = (sqlite3_vfs *)pAsyncVfs->pAppData;
return pVfs->xGetTempName(pVfs, zBufOut);
}
static int asyncFullPathname(
sqlite3_vfs *pAsyncVfs,
const char *zPath,
char *zPathOut
){
sqlite3_vfs *pVfs = (sqlite3_vfs *)pAsyncVfs->pAppData;
return sqlite3OsFullPathname(pVfs, zPath, zPathOut);
}
static void *asyncDlOpen(sqlite3_vfs *pAsyncVfs, const char *zPath){
sqlite3_vfs *pVfs = (sqlite3_vfs *)pAsyncVfs->pAppData;
return pVfs->xDlOpen(pVfs, zPath);
}
static void asyncDlError(sqlite3_vfs *pAsyncVfs, int nByte, char *zErrMsg){
sqlite3_vfs *pVfs = (sqlite3_vfs *)pAsyncVfs->pAppData;
pVfs->xDlError(pVfs, nByte, zErrMsg);
}
static void *asyncDlSym(
sqlite3_vfs *pAsyncVfs,
void *pHandle,
const char *zSymbol
){
sqlite3_vfs *pVfs = (sqlite3_vfs *)pAsyncVfs->pAppData;
return pVfs->xDlSym(pVfs, pHandle, zSymbol);
}
static void asyncDlClose(sqlite3_vfs *pAsyncVfs, void *pHandle){
sqlite3_vfs *pVfs = (sqlite3_vfs *)pAsyncVfs->pAppData;
pVfs->xDlClose(pVfs, pHandle);
}
static int asyncRandomness(sqlite3_vfs *pAsyncVfs, int nByte, char *zBufOut){
sqlite3_vfs *pVfs = (sqlite3_vfs *)pAsyncVfs->pAppData;
return pVfs->xRandomness(pVfs, nByte, zBufOut);
}
static int asyncSleep(sqlite3_vfs *pAsyncVfs, int nMicro){
sqlite3_vfs *pVfs = (sqlite3_vfs *)pAsyncVfs->pAppData;
return pVfs->xSleep(pVfs, nMicro);
}
static int asyncCurrentTime(sqlite3_vfs *pAsyncVfs, double *pTimeOut){
sqlite3_vfs *pVfs = (sqlite3_vfs *)pAsyncVfs->pAppData;
return pVfs->xCurrentTime(pVfs, pTimeOut);
}
static sqlite3_vfs async_vfs = {
1, /* iVersion */
sizeof(AsyncFile), /* szOsFile */
0, /* mxPathname */
0, /* pNext */
"async", /* zName */
0, /* pAppData */
asyncOpen, /* xOpen */
asyncDelete, /* xDelete */
asyncAccess, /* xAccess */
asyncGetTempName, /* xGetTempName */
asyncFullPathname, /* xFullPathname */
asyncDlOpen, /* xDlOpen */
asyncDlError, /* xDlError */
asyncDlSym, /* xDlSym */
asyncDlClose, /* xDlClose */
asyncRandomness, /* xDlError */
asyncSleep, /* xDlSym */
asyncCurrentTime /* xDlClose */
};
/*
** Call this routine to enable or disable the
** asynchronous IO features implemented in this file.
@ -833,41 +826,19 @@ static int asyncFileExists(const char *z){
** this routine while any SQLite database connections are open.
*/
static void asyncEnable(int enable){
if( enable && xOrigOpenReadWrite==0 ){
assert(sqlite3Os.xOpenReadWrite);
if( enable ){
if( !async_vfs.pAppData ){
async_vfs.pAppData = (void *)sqlite3_vfs_find(0);
async_vfs.mxPathname = ((sqlite3_vfs *)async_vfs.pAppData)->mxPathname;
sqlite3_vfs_register(&async_vfs, 1);
sqlite3HashInit(&async.aLock, SQLITE_HASH_BINARY, 1);
xOrigOpenReadWrite = sqlite3Os.xOpenReadWrite;
xOrigOpenReadOnly = sqlite3Os.xOpenReadOnly;
xOrigOpenExclusive = sqlite3Os.xOpenExclusive;
xOrigDelete = sqlite3Os.xDelete;
xOrigFileExists = sqlite3Os.xFileExists;
xOrigSyncDirectory = sqlite3Os.xSyncDirectory;
sqlite3Os.xOpenReadWrite = asyncOpenReadWrite;
sqlite3Os.xOpenReadOnly = asyncOpenReadOnly;
sqlite3Os.xOpenExclusive = asyncOpenExclusive;
sqlite3Os.xDelete = asyncDelete;
sqlite3Os.xFileExists = asyncFileExists;
sqlite3Os.xSyncDirectory = asyncSyncDirectory;
assert(sqlite3Os.xOpenReadWrite);
}
if( !enable && xOrigOpenReadWrite!=0 ){
assert(sqlite3Os.xOpenReadWrite);
}else{
if( async_vfs.pAppData ){
sqlite3_vfs_unregister(&async_vfs);
async_vfs.pAppData = 0;
sqlite3HashClear(&async.aLock);
sqlite3Os.xOpenReadWrite = xOrigOpenReadWrite;
sqlite3Os.xOpenReadOnly = xOrigOpenReadOnly;
sqlite3Os.xOpenExclusive = xOrigOpenExclusive;
sqlite3Os.xDelete = xOrigDelete;
sqlite3Os.xFileExists = xOrigFileExists;
sqlite3Os.xSyncDirectory = xOrigSyncDirectory;
xOrigOpenReadWrite = 0;
xOrigOpenReadOnly = 0;
xOrigOpenExclusive = 0;
xOrigDelete = 0;
xOrigFileExists = 0;
xOrigSyncDirectory = 0;
assert(sqlite3Os.xOpenReadWrite);
}
}
}
@ -891,6 +862,7 @@ static void asyncEnable(int enable){
** Only one instance of this procedure may be running at a time.
*/
static void *asyncWriterThread(void *NotUsed){
sqlite3_vfs *pVfs = (sqlite3_vfs *)(async_vfs.pAppData);
AsyncWrite *p = 0;
int rc = SQLITE_OK;
int holdingMutex = 0;
@ -899,7 +871,7 @@ static void *asyncWriterThread(void *NotUsed){
return 0;
}
while( async.writerHaltNow==0 ){
OsFile *pBase = 0;
sqlite3_file *pBase = 0;
if( !holdingMutex ){
pthread_mutex_lock(&async.queueMutex);
@ -940,18 +912,18 @@ static void *asyncWriterThread(void *NotUsed){
if( async.ioError!=SQLITE_OK && p->op!=ASYNC_CLOSE ){
p->op = ASYNC_NOOP;
}
if( p->pFile ){
pBase = p->pFile->pBaseWrite;
if( p->pFileData ){
pBase = p->pFileData->pBaseWrite;
if(
p->op==ASYNC_CLOSE ||
p->op==ASYNC_OPENEXCLUSIVE ||
(pBase && (p->op==ASYNC_SYNC || p->op==ASYNC_WRITE) )
(pBase->pMethods && (p->op==ASYNC_SYNC || p->op==ASYNC_WRITE) )
){
pthread_mutex_unlock(&async.queueMutex);
holdingMutex = 0;
}
if( !pBase ){
pBase = p->pFile->pBaseRead;
if( !pBase->pMethods ){
pBase = p->pFileData->pBaseRead;
}
}
@ -962,67 +934,44 @@ static void *asyncWriterThread(void *NotUsed){
case ASYNC_WRITE:
assert( pBase );
ASYNC_TRACE(("WRITE %s %d bytes at %d\n",
p->pFile->zName, p->nByte, p->iOffset));
rc = sqlite3OsSeek(pBase, p->iOffset);
if( rc==SQLITE_OK ){
rc = sqlite3OsWrite(pBase, (const void *)(p->zBuf), p->nByte);
}
p->pFileData->zName, p->nByte, p->iOffset));
rc = sqlite3OsWrite(pBase, (void *)(p->zBuf), p->nByte, p->iOffset);
break;
case ASYNC_SYNC:
assert( pBase );
ASYNC_TRACE(("SYNC %s\n", p->pFile->zName));
ASYNC_TRACE(("SYNC %s\n", p->pFileData->zName));
rc = sqlite3OsSync(pBase, p->nByte);
break;
case ASYNC_TRUNCATE:
assert( pBase );
ASYNC_TRACE(("TRUNCATE %s to %d bytes\n", p->pFile->zName, p->iOffset));
ASYNC_TRACE(("TRUNCATE %s to %d bytes\n",
p->pFileData->zName, p->iOffset));
rc = sqlite3OsTruncate(pBase, p->iOffset);
break;
case ASYNC_CLOSE:
ASYNC_TRACE(("CLOSE %s\n", p->pFile->zName));
sqlite3OsClose(&p->pFile->pBaseWrite);
sqlite3OsClose(&p->pFile->pBaseRead);
sqlite3_free(p->pFile);
break;
case ASYNC_OPENDIRECTORY:
assert( pBase );
ASYNC_TRACE(("OPENDIR %s\n", p->zBuf));
sqlite3OsOpenDirectory(pBase, p->zBuf);
break;
case ASYNC_SETFULLSYNC:
assert( pBase );
ASYNC_TRACE(("SETFULLSYNC %s %d\n", p->pFile->zName, p->nByte));
sqlite3OsSetFullSync(pBase, p->nByte);
ASYNC_TRACE(("CLOSE %s\n", p->pFileData->zName));
sqlite3OsClose(p->pFileData->pBaseWrite);
sqlite3OsClose(p->pFileData->pBaseRead);
sqlite3_free(p->pFileData);
break;
case ASYNC_DELETE:
ASYNC_TRACE(("DELETE %s\n", p->zBuf));
rc = xOrigDelete(p->zBuf);
break;
case ASYNC_SYNCDIRECTORY:
ASYNC_TRACE(("SYNCDIR %s\n", p->zBuf));
rc = xOrigSyncDirectory(p->zBuf);
rc = sqlite3OsDelete(pVfs, p->zBuf, (int)p->iOffset);
break;
case ASYNC_OPENEXCLUSIVE: {
AsyncFile *pFile = p->pFile;
int delFlag = ((p->iOffset)?1:0);
OsFile *pBase = 0;
ASYNC_TRACE(("OPEN %s delFlag=%d\n", p->zBuf, delFlag));
assert(pFile->pBaseRead==0 && pFile->pBaseWrite==0);
rc = xOrigOpenExclusive(p->zBuf, &pBase, delFlag);
int flags = (int)p->iOffset;
AsyncFileData *pData = p->pFileData;
ASYNC_TRACE(("OPEN %s flags=%d\n", p->zBuf, (int)p->iOffset));
assert(pData->pBaseRead->pMethods==0 && pData->pBaseWrite->pMethods==0);
rc = sqlite3OsOpen(pVfs, pData->zName, pData->pBaseRead, flags, 0);
assert( holdingMutex==0 );
pthread_mutex_lock(&async.queueMutex);
holdingMutex = 1;
if( rc==SQLITE_OK ){
pFile->pBaseRead = pBase;
}
break;
}
@ -1075,7 +1024,7 @@ static void *asyncWriterThread(void *NotUsed){
pthread_mutex_unlock(&async.queueMutex);
holdingMutex = 0;
if( async.ioDelay>0 ){
sqlite3OsSleep(async.ioDelay);
sqlite3OsSleep(pVfs, async.ioDelay);
}else{
sched_yield();
}
@ -1112,7 +1061,7 @@ static int testAsyncEnable(
return TCL_ERROR;
}
if( objc==1 ){
Tcl_SetObjResult(interp, Tcl_NewBooleanObj(xOrigOpenReadWrite!=0));
Tcl_SetObjResult(interp, Tcl_NewBooleanObj(async_vfs.pAppData!=0));
}else{
int en;
if( Tcl_GetBooleanFromObj(interp, objv[1], &en) ) return TCL_ERROR;

17
test/async2.test
View File

@ -5,17 +5,22 @@
#
#***********************************************************************
#
# $Id: async2.test,v 1.3 2006/02/14 14:02:08 danielk1977 Exp $
# $Id: async2.test,v 1.4 2007/08/25 12:29:30 danielk1977 Exp $
if {[info commands sqlite3async_enable]==""} {
# The async logic is not built into this system
return
}
set testdir [file dirname $argv0]
source $testdir/tester.tcl
if {
[info commands sqlite3async_enable]=="" ||
[info command sqlite_malloc_stat]==""
} {
# The async logic is not built into this system
puts "Skipping async2 tests: not compiled with required features"
finish_test
return
}
# Enable asynchronous IO.
set setup_script {