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This is an example of documentation generated by ZigDoc, an alternative to Zig's built-in Auto Doc feature. See also examples in other modes/formats. The project being documented here (as the example) is the Zig standard library. Public Function

concurrent

Doc Source

Public Function

std.Io.Select.concurrent

pub fn concurrent(
            s: *S,
            comptime field: Field,
            function: anytype,
            args: std.meta.ArgsTuple(@TypeOf(function)),
        ) ConcurrentError!void

Calls function with args concurrently. The resource spawned is owned by the select.

function must have return type matching the field field of Union.

After this function returns successfully, it is guaranteed that function has been assigned a unit of concurrency, and await or cancel must be called before the select is deinitialized.

Threadsafe.

Io.concurrent
Group.concurrent

Params

s: *S
field: Field
function
args: std.meta.ArgsTuple(@TypeOf(function))

Errors

ConcurrencyUnavailable: May occur due to a temporary condition such as resource exhaustion, or to the Io implementation not supporting concurrency.

File

Io.zig:1566

        pub fn concurrent(
            s: *S,
            comptime field: Field,
            function: anytype,
            args: std.meta.ArgsTuple(@TypeOf(function)),
        ) ConcurrentError!void {
            const Context = struct {
                select: *S,
                args: @TypeOf(args),
                fn start(type_erased_context: *const anyopaque) void {
                    const context: *const @This() = @ptrCast(@alignCast(type_erased_context));
                    const result = @call(.auto, function, context.args);
                    const elem = @unionInit(U, @tagName(field), result);
                    context.select.queue.putOneUncancelable(context.select.io, elem) catch |err| switch (err) {
                        error.Closed => {},
                    };
                }
            };
            const context: Context = .{ .select = s, .args = args };
            try s.io.vtable.groupConcurrent(s.io.userdata, &s.group, @ptrCast(&context), .of(Context), Context.start);
        }