private unsafe void WriteFile(long position, byte *p, int numberOf4Kb)
{
if (numberOf4Kb == 0)
{
return; // nothing to do
}
var nNumberOfBytesToWrite = (ulong)numberOf4Kb * (4 * Constants.Size.Kilobyte);
using (_options.IoMetrics.MeterIoRate(_filename.FullPath, IoMetrics.MeterType.JournalWrite, (long)nNumberOfBytesToWrite))
{
Syscall.PwriteOrThrow(_fd, p, nNumberOfBytesToWrite, position * 4 * Constants.Size.Kilobyte, _filename.FullPath, "pwrite journal WriteFile");
}
}