| ... | ... | @@ -829,4 +829,24 @@ pub const File = struct { |
| 829 | 829 | pub fn seekableStream(file: File) SeekableStream { |
| 830 | 830 | return .{ .context = file }; |
| 831 | 831 | } |
| 832 | |
| 833 | pub const SetLockError = os.FlockError; |
| 834 | |
| 835 | /// Blocks when an incompatible lock is held by another process. |
| 836 | /// `non_blocking` may be used to make a non-blocking request, |
| 837 | /// causing this function to possibly return `error.WouldBlock`. |
| 838 | /// A process may hold only one type of lock (shared or exclusive) on |
| 839 | /// a file. When a process terminates in any way, the lock is released. |
| 840 | /// TODO: integrate with async I/O |
| 841 | pub fn setLock(file: File, lock: Lock, non_blocking: bool) SetLockError!void { |
| 842 | if (is_windows) { |
| 843 | @compileError("TODO implement fs.File.setLock for Windows"); |
| 844 | } |
| 845 | const non_blocking_flag = if (non_blocking) os.LOCK_NB else @as(i32, 0); |
| 846 | try os.flock(file.handle, switch (lock) { |
| 847 | .None => os.LOCK_UN, |
| 848 | .Shared => os.LOCK_SH | non_blocking_flag, |
| 849 | .Exclusive => os.LOCK_EX | non_blocking_flag, |
| 850 | }); |
| 851 | } |
| 832 | 852 | }; |
Andrew Kelley <andrew@ziglang.org> 2021-06-27 22:32:52-07:00
lib