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

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Even in an asynchronous world, the concept of a non-blocking flag is
useful because it determines under what conditions the operation
completes.
This commit is contained in:
Andrew Kelley 2025-10-13 19:04:02 -07:00
parent 539808239e
commit d680b9e9b2
2 changed files with 6 additions and 4 deletions
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2
lib/std/Io/File.zig
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@ -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 {

8
lib/std/Io/Threaded.zig
View File

@ -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),
}