1b8e80941Smrg/* 2b8e80941Smrg * Copyright © 2017 Gražvydas Ignotas 3b8e80941Smrg * 4b8e80941Smrg * Permission is hereby granted, free of charge, to any person obtaining a 5b8e80941Smrg * copy of this software and associated documentation files (the "Software"), 6b8e80941Smrg * to deal in the Software without restriction, including without limitation 7b8e80941Smrg * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8b8e80941Smrg * and/or sell copies of the Software, and to permit persons to whom the 9b8e80941Smrg * Software is furnished to do so, subject to the following conditions: 10b8e80941Smrg * 11b8e80941Smrg * The above copyright notice and this permission notice (including the next 12b8e80941Smrg * paragraph) shall be included in all copies or substantial portions of the 13b8e80941Smrg * Software. 14b8e80941Smrg * 15b8e80941Smrg * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16b8e80941Smrg * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17b8e80941Smrg * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18b8e80941Smrg * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19b8e80941Smrg * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20b8e80941Smrg * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 21b8e80941Smrg * IN THE SOFTWARE. 22b8e80941Smrg */ 23b8e80941Smrg 24b8e80941Smrg/* #if defined(MISSING_64BIT_ATOMICS) && defined(HAVE_PTHREAD) */ 25b8e80941Smrg#include <sys/types.h> 26b8e80941Smrg#ifndef __HAVE_ATOMIC64_OPS 27b8e80941Smrg 28b8e80941Smrg#include <stdint.h> 29b8e80941Smrg#include <pthread.h> 30b8e80941Smrg 31b8e80941Smrg#if defined(HAVE_FUNC_ATTRIBUTE_WEAK) && !defined(__CYGWIN__) 32b8e80941Smrg#define WEAK __attribute__((weak)) 33b8e80941Smrg#else 34b8e80941Smrg#define WEAK 35b8e80941Smrg#endif 36b8e80941Smrg 37b8e80941Smrgstatic pthread_mutex_t sync_mutex = PTHREAD_MUTEX_INITIALIZER; 38b8e80941Smrg 39b8e80941SmrgWEAK long long 40b8e80941Smrg__atomic_fetch_add_8(volatile long long *ptr, long long val, int memorder) 41b8e80941Smrg{ 42b8e80941Smrg long long r; 43b8e80941Smrg 44b8e80941Smrg pthread_mutex_lock(&sync_mutex); 45b8e80941Smrg *ptr += val; 46b8e80941Smrg r = *ptr; 47b8e80941Smrg pthread_mutex_unlock(&sync_mutex); 48b8e80941Smrg 49b8e80941Smrg return r; 50b8e80941Smrg} 51b8e80941Smrg 52b8e80941SmrgWEAK long long 53b8e80941Smrg__atomic_fetch_sub_8(volatile long long *ptr, long long val, int memorder) 54b8e80941Smrg{ 55b8e80941Smrg long long r; 56b8e80941Smrg 57b8e80941Smrg pthread_mutex_lock(&sync_mutex); 58b8e80941Smrg *ptr -= val; 59b8e80941Smrg r = *ptr; 60b8e80941Smrg pthread_mutex_unlock(&sync_mutex); 61b8e80941Smrg 62b8e80941Smrg return r; 63b8e80941Smrg} 64b8e80941Smrg 65b8e80941Smrg#ifndef __clang__ 66b8e80941SmrgWEAK long long 67b8e80941Smrg__sync_val_compare_and_swap_8(volatile long long *ptr, long long oldval, long long newval) 68b8e80941Smrg{ 69b8e80941Smrg long long r; 70b8e80941Smrg 71b8e80941Smrg pthread_mutex_lock(&sync_mutex); 72b8e80941Smrg r = *ptr; 73b8e80941Smrg if (*ptr == oldval) 74b8e80941Smrg *ptr = newval; 75b8e80941Smrg pthread_mutex_unlock(&sync_mutex); 76b8e80941Smrg 77b8e80941Smrg return r; 78b8e80941Smrg} 79b8e80941Smrg#endif 80b8e80941Smrg 81b8e80941Smrg#endif 82