mirror of
https://github.com/mpv-player/mpv
synced 2024-12-27 17:42:17 +00:00
112 lines
4.3 KiB
C
112 lines
4.3 KiB
C
/*
|
|
* This file is part of mpv.
|
|
* Copyright (c) 2013 Stefano Pigozzi <stefano.pigozzi@gmail.com>
|
|
*
|
|
* mpv is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* mpv is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef MP_ATOMIC_H
|
|
#define MP_ATOMIC_H
|
|
|
|
#include <inttypes.h>
|
|
#include "config.h"
|
|
|
|
#if HAVE_STDATOMIC
|
|
#include <stdatomic.h>
|
|
typedef _Atomic float mp_atomic_float;
|
|
typedef _Atomic double mp_atomic_double;
|
|
typedef _Atomic int64_t mp_atomic_int64;
|
|
typedef _Atomic uint64_t mp_atomic_uint64;
|
|
#else
|
|
|
|
// Emulate the parts of C11 stdatomic.h needed by mpv.
|
|
|
|
typedef struct { unsigned long v; } atomic_ulong;
|
|
typedef struct { int v; } atomic_int;
|
|
typedef struct { unsigned int v; } atomic_uint;
|
|
typedef struct { _Bool v; } atomic_bool;
|
|
typedef struct { long long v; } atomic_llong;
|
|
typedef struct { uint_least32_t v; } atomic_uint_least32_t;
|
|
typedef struct { unsigned long long v; } atomic_ullong;
|
|
|
|
typedef struct { float v; } mp_atomic_float;
|
|
typedef struct { double v; } mp_atomic_double;
|
|
typedef struct { int64_t v; } mp_atomic_int64;
|
|
typedef struct { uint64_t v; } mp_atomic_uint64;
|
|
|
|
#define ATOMIC_VAR_INIT(x) \
|
|
{.v = (x)}
|
|
|
|
#define memory_order_relaxed 1
|
|
#define memory_order_seq_cst 2
|
|
#define memory_order_acq_rel 3
|
|
|
|
#include <pthread.h>
|
|
|
|
extern pthread_mutex_t mp_atomic_mutex;
|
|
|
|
#define atomic_load(p) \
|
|
({ __typeof__(p) p_ = (p); \
|
|
pthread_mutex_lock(&mp_atomic_mutex); \
|
|
__typeof__(p_->v) v_ = p_->v; \
|
|
pthread_mutex_unlock(&mp_atomic_mutex); \
|
|
v_; })
|
|
#define atomic_store(p, val) \
|
|
({ __typeof__(val) val_ = (val); \
|
|
__typeof__(p) p_ = (p); \
|
|
pthread_mutex_lock(&mp_atomic_mutex); \
|
|
p_->v = val_; \
|
|
pthread_mutex_unlock(&mp_atomic_mutex); })
|
|
#define atomic_fetch_op(a, b, op) \
|
|
({ __typeof__(a) a_ = (a); \
|
|
__typeof__(b) b_ = (b); \
|
|
pthread_mutex_lock(&mp_atomic_mutex); \
|
|
__typeof__(a_->v) v_ = a_->v; \
|
|
a_->v = v_ op b_; \
|
|
pthread_mutex_unlock(&mp_atomic_mutex); \
|
|
v_; })
|
|
#define atomic_fetch_add(a, b) atomic_fetch_op(a, b, +)
|
|
#define atomic_fetch_and(a, b) atomic_fetch_op(a, b, &)
|
|
#define atomic_fetch_or(a, b) atomic_fetch_op(a, b, |)
|
|
#define atomic_exchange(p, new) \
|
|
({ __typeof__(p) p_ = (p); \
|
|
pthread_mutex_lock(&mp_atomic_mutex); \
|
|
__typeof__(p_->v) res_ = p_->v; \
|
|
p_->v = (new); \
|
|
pthread_mutex_unlock(&mp_atomic_mutex); \
|
|
res_; })
|
|
#define atomic_compare_exchange_strong(p, old, new) \
|
|
({ __typeof__(p) p_ = (p); \
|
|
__typeof__(old) old_ = (old); \
|
|
__typeof__(new) new_ = (new); \
|
|
pthread_mutex_lock(&mp_atomic_mutex); \
|
|
int res_ = p_->v == *old_; \
|
|
if (res_) { \
|
|
p_->v = new_; \
|
|
} else { \
|
|
*old_ = p_->v; \
|
|
} \
|
|
pthread_mutex_unlock(&mp_atomic_mutex); \
|
|
res_; })
|
|
|
|
#define atomic_load_explicit(a, b) \
|
|
atomic_load(a)
|
|
|
|
#define atomic_exchange_explicit(a, b, c) \
|
|
atomic_exchange(a, b)
|
|
|
|
#endif /* else HAVE_STDATOMIC */
|
|
|
|
#endif
|