blob: 0c16023f94c99ad375974a3eeba0d300e5abdffc (
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
|
const std = @import("std");
pub fn Rc(comptime T: type) type {
const Cell = struct {
value: T,
ref_count: usize,
};
return struct {
const Self = @This();
allocator: std.mem.Allocator,
ptr: *Cell,
pub fn init(allocator: std.mem.Allocator) !Self {
const ptr = try allocator.create(Cell);
ptr.ref_count = 1;
return .{
.allocator = allocator,
.ptr = ptr,
};
}
pub fn deinit(self: *const Self) void {
self.ptr.ref_count -= 1;
if (self.ptr.ref_count == 0) {
self.allocator.destroy(self.ptr);
}
}
pub fn clone(self: *const Self) Self {
self.ptr.ref_count += 1;
return .{
.allocator = self.allocator,
.ptr = self.ptr,
};
}
pub fn get(self: *const Self) *const T {
return &self.ptr.value;
}
pub fn get_mut(self: *Self) *T {
return &self.ptr.value;
}
};
}
|
