motiejus/zig

commit d680b9e9b2320612a4e988763f5090c4ae8f9a8f (tree)
parent 539808239ecae050e383dd11f395a363b4404e21
Author: Andrew Kelley <andrew@ziglang.org>
Date:   Mon, 13 Oct 2025 19:04:02 -0700

std.Io.File: add WouldBlock to the error set

Even in an asynchronous world, the concept of a non-blocking flag is
useful because it determines under what conditions the operation
completes.

Diffstat:
M
lib/std/Io/File.zig
 | 
2
++
M
lib/std/Io/Threaded.zig
 | 
8
++++----

2 files changed, 6 insertions(+), 4 deletions(-)
diff --git a/lib/std/Io/File.zig b/lib/std/Io/File.zig
@@ -139,6 +139,8 @@ pub const OpenError = error{
     ///   kernel (e.g., for module/firmware loading), and write access was
     ///   requested.
     FileBusy,
+    /// Non-blocking was requested and the operation cannot return immediately.
+    WouldBlock,
 } || Io.Dir.PathNameError || Io.Cancelable || Io.UnexpectedError;
 
 pub fn close(file: File, io: Io) void {
diff --git a/lib/std/Io/Threaded.zig b/lib/std/Io/Threaded.zig
@@ -1039,7 +1039,7 @@ fn dirCreateFilePosix(
             .EXIST => return error.PathAlreadyExists,
             .BUSY => return error.DeviceBusy,
             .OPNOTSUPP => return error.FileLocksNotSupported,
-            //.AGAIN => return error.WouldBlock,
+            .AGAIN => return error.WouldBlock,
             .TXTBSY => return error.FileBusy,
             .NXIO => return error.NoDevice,
             .ILSEQ => return error.BadPathName,
@@ -1064,7 +1064,7 @@ fn dirCreateFilePosix(
                 .BADF => |err| return errnoBug(err),
                 .INVAL => |err| return errnoBug(err), // invalid parameters
                 .NOLCK => return error.SystemResources,
-                //.AGAIN => return error.WouldBlock,
+                .AGAIN => return error.WouldBlock,
                 .OPNOTSUPP => return error.FileLocksNotSupported,
                 else => |err| return posix.unexpectedErrno(err),
             }
@@ -1168,7 +1168,7 @@ fn dirOpenFile(
             .EXIST => return error.PathAlreadyExists,
             .BUSY => return error.DeviceBusy,
             .OPNOTSUPP => return error.FileLocksNotSupported,
-            //.AGAIN => return error.WouldBlock,
+            .AGAIN => return error.WouldBlock,
             .TXTBSY => return error.FileBusy,
             .NXIO => return error.NoDevice,
             .ILSEQ => return error.BadPathName,
@@ -1193,7 +1193,7 @@ fn dirOpenFile(
                 .BADF => |err| return errnoBug(err),
                 .INVAL => |err| return errnoBug(err), // invalid parameters
                 .NOLCK => return error.SystemResources,
-                //.AGAIN => return error.WouldBlock,
+                .AGAIN => return error.WouldBlock,
                 .OPNOTSUPP => return error.FileLocksNotSupported,
                 else => |err| return posix.unexpectedErrno(err),
             }