diff options
Diffstat (limited to 'queue.c')
| -rw-r--r-- | queue.c | 129 |
1 files changed, 111 insertions, 18 deletions
@@ -190,10 +190,75 @@ rsRetVal qDelLinkedList(queue_t *pThis, void **ppUsr) /* -------------------- disk -------------------- */ +/* first, disk-queue internal utility functions */ + + +/* open a queue file */ +rsRetVal qDiskOpenFile(queue_t *pThis, queueFileDescription_t *pFile, int flags, mode_t mode) +{ + DEFiRet; + uchar *pszFile = NULL; + + assert(pThis != NULL); + assert(pFile != NULL); + /* now open the write file */ + CHKiRet(genFileName(&pszFile, pThis->tVars.disk.pszSpoolDir, pThis->tVars.disk.lenSpoolDir, + (uchar*) "mainq", 5, pFile->iCurrFileNum, (uchar*) "qf", 2)); + + pFile->fd = open((char*)pszFile, flags, mode); // TODO: open modes! + pFile->iCurrOffs = 0; + + dbgprintf("Queue 0x%lx: opened file '%s' for %d as %d\n", (unsigned long) pThis, pszFile, flags, pFile->fd); + +finalize_it: + if(pszFile != NULL) + free(pszFile); /* no longer needed in any case (just for open) */ + + return iRet; +} + + +/* close a queue file */ +rsRetVal qDiskCloseFile(queue_t *pThis, queueFileDescription_t *pFile) +{ + DEFiRet; + + assert(pThis != NULL); + assert(pFile != NULL); + dbgprintf("Queue 0x%lx: closing file %d\n", (unsigned long) pThis, pFile->fd); + + close(pFile->fd); // TODO: error check + pFile->fd = -1; + + return iRet; +} + + +/* switch to next queue file */ +rsRetVal qDiskNextFile(queue_t *pThis, queueFileDescription_t *pFile) +{ + DEFiRet; + + assert(pThis != NULL); + assert(pFile != NULL); + CHKiRet(qDiskCloseFile(pThis, pFile)); + + /* we do modulo 1,000,000 so that the file number is always at most 6 digits. If we have a million + * or more queue files, something is awfully wrong and it is OK if we run into problems in that + * situation ;) -- rgerhards, 2008-01-09 + */ + pFile->iCurrFileNum = (pFile->iCurrFileNum + 1) % 1000000; + +finalize_it: + return iRet; +} + + +/* now come the disk mode queue driver functions */ + rsRetVal qConstructDisk(queue_t *pThis) { DEFiRet; - uchar *pszFile; assert(pThis != NULL); @@ -201,20 +266,17 @@ rsRetVal qConstructDisk(queue_t *pThis) ABORT_FINALIZE(RS_RET_OUT_OF_MEMORY); pThis->tVars.disk.lenSpoolDir = strlen((char*)pThis->tVars.disk.pszSpoolDir); + pThis->tVars.disk.iMaxFileSize = 1024; // TODO: configurable! - /* now open the file */ - CHKiRet(genFileName(&pszFile, pThis->tVars.disk.pszSpoolDir, pThis->tVars.disk.lenSpoolDir, - (uchar*) "mainq", 5, 1, (uchar*) "qf", 2)); - - dbgprintf("Queue 0x%lx: opening file '%s'\n", (unsigned long) pThis, pszFile); + pThis->tVars.disk.fWrite.iCurrFileNum = 1; + pThis->tVars.disk.fWrite.iCurrOffs = 0; + pThis->tVars.disk.fWrite.fd = -1; - pThis->tVars.disk.fd = open((char*)pszFile, O_RDWR|O_CREAT, 0600); - dbgprintf("opened file %d\n", pThis->tVars.disk.fd); + pThis->tVars.disk.fRead.iCurrFileNum = 1; + pThis->tVars.disk.fRead.fd = -1; + pThis->tVars.disk.fWrite.iCurrOffs = 0; finalize_it: - if(pThis->tVars.disk.pszSpoolDir != NULL) - free(pThis->tVars.disk.pszSpoolDir); - return iRet; } @@ -225,7 +287,13 @@ rsRetVal qDestructDisk(queue_t *pThis) assert(pThis != NULL); - close(pThis->tVars.disk.fd); + if(pThis->tVars.disk.fWrite.fd != -1) + qDiskCloseFile(pThis, &pThis->tVars.disk.fWrite); + if(pThis->tVars.disk.fRead.fd != -1) + qDiskCloseFile(pThis, &pThis->tVars.disk.fRead); + + if(pThis->tVars.disk.pszSpoolDir != NULL) + free(pThis->tVars.disk.pszSpoolDir); return iRet; } @@ -233,14 +301,23 @@ rsRetVal qDestructDisk(queue_t *pThis) rsRetVal qAddDisk(queue_t *pThis, void* pUsr) { DEFiRet; - int i; + int iWritten; rsCStrObj *pCStr; assert(pThis != NULL); - dbgprintf("writing to file %d\n", pThis->tVars.disk.fd); - CHKiRet((objSerialize(pUsr))(pUsr, &pCStr)); // TODO: hier weiter machen! - i = write(pThis->tVars.disk.fd, rsCStrGetBufBeg(pCStr), rsCStrLen(pCStr)); - dbgprintf("write wrote %d bytes, errno: %d, err %s\n", i, errno, strerror(errno)); + + if(pThis->tVars.disk.fWrite.fd == -1) + CHKiRet(qDiskOpenFile(pThis, &pThis->tVars.disk.fWrite, O_RDWR|O_CREAT, 0600)); // TODO: open modes! + + CHKiRet((objSerialize(pUsr))(pUsr, &pCStr)); + iWritten = write(pThis->tVars.disk.fWrite.fd, rsCStrGetBufBeg(pCStr), rsCStrLen(pCStr)); + dbgprintf("Queue 0x%lx: write wrote %d bytes, errno: %d, err %s\n", (unsigned long) pThis, + iWritten, errno, strerror(errno)); + /* TODO: handle error case -- rgerhards, 2008-01-07 */ + + pThis->tVars.disk.fWrite.iCurrOffs += iWritten; + if(pThis->tVars.disk.fWrite.iCurrOffs >= pThis->tVars.disk.iMaxFileSize) + CHKiRet(qDiskNextFile(pThis, &pThis->tVars.disk.fWrite)); finalize_it: return iRet; @@ -250,8 +327,22 @@ rsRetVal qDelDisk(queue_t __attribute__((unused)) *pThis, void __attribute__((un { DEFiRet; + assert(pThis != NULL); + + if(pThis->tVars.disk.fRead.fd == -1) + CHKiRet(qDiskOpenFile(pThis, &pThis->tVars.disk.fRead, O_RDONLY, 0600)); // TODO: open modes! + + /* read here */ + /* de-serialize here */ + + /* switch to next file when EOF is reached. We may also delete the last file in that case. + pThis->tVars.disk.fWrite.iCurrOffs += iWritten; + if(pThis->tVars.disk.fWrite.iCurrOffs >= pThis->tVars.disk.iMaxFileSize) + CHKiRet(qDiskNextFile(pThis, &pThis->tVars.disk.fWrite)); + */ iRet = RS_RET_ERR; +finalize_it: return iRet; } @@ -434,7 +525,7 @@ rsRetVal queueConstruct(queue_t **ppThis, queueType_t qType, int iWorkerThreads, pThis->iNumWorkerThreads = iWorkerThreads; pThis->qType = qType; - /* set type-specific handlers */ + /* set type-specific handlers and other very type-specific things (we can not totally hide it...) */ switch(qType) { case QUEUETYPE_FIXED_ARRAY: pThis->qConstruct = qConstructFixedArray; @@ -453,6 +544,8 @@ rsRetVal queueConstruct(queue_t **ppThis, queueType_t qType, int iWorkerThreads, pThis->qDestruct = qDestructDisk; pThis->qAdd = qAddDisk; pThis->qDel = qDelDisk; + /* special handling */ + pThis->iNumWorkerThreads = 1; /* we need exactly one worker */ break; case QUEUETYPE_DIRECT: pThis->qConstruct = qConstructDirect; |