public override void Unlock()
{
if (locked_count <= 0)
{
throw new ApplicationException("locked_count <= 0");
}
if (locked_count == 1)
{
Unisys.Close(this.fs);
this.fs = IntPtr.Zero;
}
locked_count--;
}
public override void Lock()
{
if (locked_count == 0)
{
IO.MakeDirIfNotExists(Env.UnixMutantDir);
Unisys.Permissions perm = Unisys.Permissions.S_IRUSR | Unisys.Permissions.S_IWUSR | Unisys.Permissions.S_IRGRP | Unisys.Permissions.S_IWGRP | Unisys.Permissions.S_IROTH | Unisys.Permissions.S_IWOTH;
IntPtr f = Unisys.Open(filename, Unisys.OpenFlags.O_CREAT, (int)perm);
if (f.ToInt64() < 0)
{
throw new IOException("Open failed.");
}
if (Unisys.FLock(f, Unisys.LockOperations.LOCK_EX) == -1)
{
throw new IOException("FLock failed.");
}
this.fs = f;
locked_count++;
}
}