blob: c9303274a927bad03b9e6ed3d20d4a608b2e0304 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
// SPDX-License-Identifier: MIT
// Copyright (c) 2015-2021 Zig Contributors
// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
// The MIT license requires this copyright notice to be included in all copies
// and substantial portions of the software.
const std = @import("../std.zig");
const Lock = std.event.Lock;
/// Thread-safe async/await lock that protects one piece of data.
/// Functions which are waiting for the lock are suspended, and
/// are resumed when the lock is released, in order.
pub fn Locked(comptime T: type) type {
return struct {
lock: Lock,
private_data: T,
const Self = @This();
pub const HeldLock = struct {
value: *T,
held: Lock.Held,
pub fn release(self: HeldLock) void {
self.held.release();
}
};
pub fn init(data: T) Self {
return Self{
.lock = Lock.init(),
.private_data = data,
};
}
pub fn deinit(self: *Self) void {
self.lock.deinit();
}
pub fn acquire(self: *Self) callconv(.Async) HeldLock {
return HeldLock{
// TODO guaranteed allocation elision
.held = self.lock.acquire(),
.value = &self.private_data,
};
}
};
}
|
