| /* SPDX-License-Identifier: LGPL-2.1+ */ | |
| #pragma once | |
| /* A type-safe atomic refcounter. | |
| * | |
| * DO NOT USE THIS UNLESS YOU ACTUALLY CARE ABOUT THREAD SAFETY! */ | |
| typedef struct { | |
| volatile unsigned _value; | |
| } RefCount; | |
| #define REFCNT_GET(r) ((r)._value) | |
| #define REFCNT_INC(r) (__sync_add_and_fetch(&(r)._value, 1)) | |
| #define REFCNT_DEC(r) (__sync_sub_and_fetch(&(r)._value, 1)) | |
| #define REFCNT_INIT ((RefCount) { ._value = 1 }) |