SQLite

  return rc;
}

/*
 ** Close a file & cleanup AFP specific locking context 
 */
static int afpUnixClose(sqlite3_file *id) {
  unixFile *pFile = (unixFile*)pId;

  if( !pFile ) return SQLITE_OK;
  afpUnixUnlock(*pId, NO_LOCK);
  /* free the AFP locking structure */
  if (pFile->lockingContext != NULL) {
    if (((afpLockingContext *)pFile->lockingContext)->filePath != NULL)
      sqlite3_free(((afpLockingContext*)pFile->lockingContext)->filePath);
    sqlite3_free(pFile->lockingContext);
  }

  if( pFile->dirfd>=0 ) close(pFile->dirfd);
  pFile->dirfd = -1;

  close(pFile->h);

  OSTRACE2("CLOSE   %-3d\n", pFile->h);
  OpenCounter(-1);

  return SQLITE_OK;
}


#pragma mark flock() style locking

/*

    return SQLITE_OK;
  }
}

/*
 ** Close a file.
 */
static int flockUnixClose(sqlite3_file *pId) {
  unixFile *pFile = (unixFile*)*pId;
  
  if( !pFile ) return SQLITE_OK;
  flockUnixUnlock(*pId, NO_LOCK);
  
  if( pFile->dirfd>=0 ) close(pFile->dirfd);
  pFile->dirfd = -1;
  enterMutex();
  

  close(pFile->h);  
  leaveMutex();
  OSTRACE2("CLOSE   %-3d\n", pFile->h);
  OpenCounter(-1);

  return SQLITE_OK;
}

#pragma mark Old-School .lock file based locking

/*
 ** The dotlockLockingContext structure contains all dotlock (.lock) lock

/*
 ** Close a file.
 */
static int dotlockUnixClose(sqlite3_file *id) {
  unixFile *pFile = (unixFile*)id;
  
  if( !pFile ) return SQLITE_OK;
  dotlockUnixUnlock(*pId, NO_LOCK);
  /* free the dotlock locking structure */
  if (pFile->lockingContext != NULL) {
    if (((dotlockLockingContext *)pFile->lockingContext)->lockPath != NULL)
      sqlite3_free( ( (dotlockLockingContext *)
        pFile->lockingContext)->lockPath);
    sqlite3_free(pFile->lockingContext);
  }
  
  if( pFile->dirfd>=0 ) close(pFile->dirfd);
  pFile->dirfd = -1;
  enterMutex();
  
  close(pFile->h);
  
  leaveMutex();
  OSTRACE2("CLOSE   %-3d\n", pFile->h);
  OpenCounter(-1);

  return SQLITE_OK;
}


#pragma mark No locking

/*

static int nolockUnixClose(sqlite3_file *id) {
  unixFile *pFile = (unixFile*)id;
  
  if( !pFile ) return SQLITE_OK;
  if( pFile->dirfd>=0 ) close(pFile->dirfd);
  pFile->dirfd = -1;
  enterMutex();
  
  close(pFile->h);
  
  leaveMutex();
  OSTRACE2("CLOSE   %-3d\n", pFile->h);
  OpenCounter(-1);

  return SQLITE_OK;
}

#endif /* SQLITE_ENABLE_LOCKING_STYLE */


/*

#ifdef SQLITE_ENABLE_LOCKING_STYLE
/*
** This vector defines all the methods that can operate on an sqlite3_file
** for unix with AFP style file locking.
*/
static const sqlite3_io_methods sqlite3AFPLockingUnixIoMethod = {
  1,                        /* iVersion */
  unixClose,
  unixRead,
  unixWrite,
  unixTruncate,
  unixSync,
  unixFileSize,
  afpUnixLock,
  afpUnixUnlock,

** are needed to determine the unixFile pMethod to use for locking operations.
** The locking-style specific lockingContext data structure is created 
** and assigned here also.
*/
static int fillInUnixFile(
  int h,                  /* Open file descriptor of file being opened */
  int dirfd,              /* Directory file descriptor */
  sqlite3_file *pId,      /* Write completed initialization here */
  const char *zFilename,  /* Name of the file being opened */
){
  sqlite3LockingStyle lockingStyle;
  unixFile *pNew = (unixFile *)pId;
  int rc;




  memset(pNew, 0, sizeof(unixFile));
  lockingStyle = sqlite3DetectLockingStyle(zFilename, h);
  if ( lockingStyle == posixLockingStyle ) {

    enterMutex();
    rc = findLockInfo(h, &pNew->pLock, &pNew->pOpen);
    leaveMutex();
    if( rc ){

      close(h);
      unlink(zFilename);
      return SQLITE_NOMEM;
    }
  } else {
    /*  pLock and pOpen are only used for posix advisory locking */
    pNew->pLock = NULL;
    pNew->pOpen = NULL;
  }


  pNew->dirfd = -1;
  pNew->h = h;

  SET_THREADID(pNew);
  pNew = sqlite3_malloc( sizeof(unixFile) );
  if( pNew==0 ){
    close(h);
    enterMutex();
    releaseLockInfo(pNew->pLock);
    releaseOpenCnt(pNew->pOpen);
    leaveMutex();
    return SQLITE_NOMEM;
  }else{
    switch(lockingStyle) {
      case afpLockingStyle: {
        /* afp locking uses the file path so it needs to be included in
        ** the afpLockingContext */
        int nFilename;
        pNew->pMethod = &sqlite3AFPLockingUnixIoMethod;
        pNew->lockingContext = 
          sqlite3_malloc(sizeof(afpLockingContext));
        nFilename = strlen(zFilename)+1;
        ((afpLockingContext *)pNew->lockingContext)->filePath = 
          sqlite3_malloc(nFilename);
        memcpy(((afpLockingContext *)pNew->lockingContext)->filePath, 
               zFilename, nFilename);
        srandomdev();
        break;
      }
      case flockLockingStyle:
        /* flock locking doesn't need additional lockingContext information */
        pNew->pMethod = &sqlite3FlockLockingUnixIoMethod;
        break;
      case dotlockLockingStyle: {
        /* dotlock locking uses the file path so it needs to be included in
         ** the dotlockLockingContext */
        int nFilename;
        pNew->pMethod = &sqlite3DotlockLockingUnixIoMethod;
        pNew->lockingContext = sqlite3_malloc(
          sizeof(dotlockLockingContext));
        nFilename = strlen(zFilename) + 6;
        ((dotlockLockingContext *)pNew->lockingContext)->lockPath = 
            sqlite3_malloc( nFilename );
        sqlite3_snprintf(nFilename, 
                ((dotlockLockingContext *)pNew->lockingContext)->lockPath, 
                "%s.lock", zFilename);
        break;
      }
      case posixLockingStyle:
        /* posix locking doesn't need additional lockingContext information */
        pNew->pMethod = &sqlite3UnixIoMethod;
        break;
      case noLockingStyle:
      case unsupportedLockingStyle:
      default: 
        pNew->pMethod = &sqlite3NolockLockingUnixIoMethod;
    }
    OpenCounter(+1);
    return SQLITE_OK;
  }
}
#else /* SQLITE_ENABLE_LOCKING_STYLE */
static int fillInUnixFile(
  int h,                 /* Open file descriptor on file being opened */
  int dirfd,
  sqlite3_file *pId,     /* Write to the unixFile structure here */
  const char *zFilename  /* Name of the file being opened */