1/* 2 * Copyright © 2017 Gražvydas Ignotas 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 21 * IN THE SOFTWARE. 22 */ 23 24#if defined(MISSING_64BIT_ATOMICS) && defined(HAVE_PTHREAD) 25 26#include <stdint.h> 27#include <pthread.h> 28 29#if defined(HAVE_FUNC_ATTRIBUTE_WEAK) && !defined(__CYGWIN__) 30#define WEAK __attribute__((weak)) 31#else 32#define WEAK 33#endif 34 35static pthread_mutex_t sync_mutex = PTHREAD_MUTEX_INITIALIZER; 36 37#ifdef __clang__ 38#pragma clang diagnostic ignored "-Wmissing-prototypes" 39#pragma redefine_extname __sync_add_and_fetch_8_c __sync_add_and_fetch_8 40#pragma redefine_extname __sync_sub_and_fetch_8_c __sync_sub_and_fetch_8 41#pragma redefine_extname __sync_fetch_and_add_8_c __sync_fetch_and_add_8 42#pragma redefine_extname __sync_fetch_and_sub_8_c __sync_fetch_and_sub_8 43#pragma redefine_extname __sync_val_compare_and_swap_8_c \ 44 __sync_val_compare_and_swap_8 45#define __sync_add_and_fetch_8 __sync_add_and_fetch_8_c 46#define __sync_sub_and_fetch_8 __sync_sub_and_fetch_8_c 47#define __sync_fetch_and_add_8 __sync_fetch_and_add_8_c 48#define __sync_fetch_and_sub_8 __sync_fetch_and_sub_8_c 49#define __sync_val_compare_and_swap_8 __sync_val_compare_and_swap_8_c 50#endif 51 52WEAK uint64_t 53__sync_add_and_fetch_8(uint64_t *ptr, uint64_t val) 54{ 55 uint64_t r; 56 57 pthread_mutex_lock(&sync_mutex); 58 *ptr += val; 59 r = *ptr; 60 pthread_mutex_unlock(&sync_mutex); 61 62 return r; 63} 64 65WEAK uint64_t 66__sync_sub_and_fetch_8(uint64_t *ptr, uint64_t val) 67{ 68 uint64_t r; 69 70 pthread_mutex_lock(&sync_mutex); 71 *ptr -= val; 72 r = *ptr; 73 pthread_mutex_unlock(&sync_mutex); 74 75 return r; 76} 77 78WEAK uint64_t 79__sync_fetch_and_add_8(uint64_t *ptr, uint64_t val) 80{ 81 uint64_t r; 82 83 pthread_mutex_lock(&sync_mutex); 84 r = *ptr; 85 *ptr += val; 86 pthread_mutex_unlock(&sync_mutex); 87 88 return r; 89} 90 91WEAK uint64_t 92__sync_fetch_and_sub_8(uint64_t *ptr, uint64_t val) 93{ 94 uint64_t r; 95 96 pthread_mutex_lock(&sync_mutex); 97 r = *ptr; 98 *ptr -= val; 99 pthread_mutex_unlock(&sync_mutex); 100 101 return r; 102} 103 104WEAK uint64_t 105__sync_val_compare_and_swap_8(uint64_t *ptr, uint64_t oldval, uint64_t newval) 106{ 107 uint64_t r; 108 109 pthread_mutex_lock(&sync_mutex); 110 r = *ptr; 111 if (*ptr == oldval) 112 *ptr = newval; 113 pthread_mutex_unlock(&sync_mutex); 114 115 return r; 116} 117 118#endif 119