public PosixJournalWriter(StorageEnvironmentOptions options, VoronPathSetting filename, long journalSize)
{
try
{
_options = options;
_filename = filename;
_maxNumberOf4KbPerSingleWrite = int.MaxValue / (4 * Constants.Size.Kilobyte);
_fd = Syscall.open(filename.FullPath, OpenFlags.O_WRONLY | options.PosixOpenFlags | PerPlatformValues.OpenFlags.O_CREAT,
FilePermissions.S_IWUSR | FilePermissions.S_IRUSR);
if (_fd == -1)
{
var err = Marshal.GetLastWin32Error();
Syscall.ThrowLastError(err, "when opening " + filename);
}
if (RunningOnMacOsx)
{
// mac doesn't support O_DIRECT, we fcntl instead:
var rc = Syscall.fcntl(_fd, FcntlCommands.F_NOCACHE, (IntPtr)1);
if (rc != 0)
{
var err = Marshal.GetLastWin32Error();
Syscall.ThrowLastError(err, "when fcntl F_NOCACHE for " + filename);
}
}
var length = new FileInfo(filename.FullPath).Length;
if (length < journalSize)
{
length = journalSize;
try
{
PosixHelper.AllocateFileSpace(options, _fd, journalSize, filename.FullPath);
}
catch (Exception)
{
Syscall.close(_fd);
throw;
}
}
if (Syscall.CheckSyncDirectoryAllowed(_filename.FullPath) && Syscall.SyncDirectory(filename.FullPath) == -1)
{
var err = Marshal.GetLastWin32Error();
Syscall.ThrowLastError(err, "when syncing dir for on " + filename);
}
NumberOfAllocated4Kb = (int)(length / (4 * Constants.Size.Kilobyte));
}
catch
{
Dispose();
throw;
}
}