11cb0ef41Sopenharmony_ci/* Copyright Joyent, Inc. and other Node contributors. All rights reserved. 21cb0ef41Sopenharmony_ci * 31cb0ef41Sopenharmony_ci * Permission is hereby granted, free of charge, to any person obtaining a copy 41cb0ef41Sopenharmony_ci * of this software and associated documentation files (the "Software"), to 51cb0ef41Sopenharmony_ci * deal in the Software without restriction, including without limitation the 61cb0ef41Sopenharmony_ci * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 71cb0ef41Sopenharmony_ci * sell copies of the Software, and to permit persons to whom the Software is 81cb0ef41Sopenharmony_ci * furnished to do so, subject to the following conditions: 91cb0ef41Sopenharmony_ci * 101cb0ef41Sopenharmony_ci * The above copyright notice and this permission notice shall be included in 111cb0ef41Sopenharmony_ci * all copies or substantial portions of the Software. 121cb0ef41Sopenharmony_ci * 131cb0ef41Sopenharmony_ci * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 141cb0ef41Sopenharmony_ci * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 151cb0ef41Sopenharmony_ci * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 161cb0ef41Sopenharmony_ci * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 171cb0ef41Sopenharmony_ci * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 181cb0ef41Sopenharmony_ci * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 191cb0ef41Sopenharmony_ci * IN THE SOFTWARE. 201cb0ef41Sopenharmony_ci */ 211cb0ef41Sopenharmony_ci 221cb0ef41Sopenharmony_ci#ifndef UV_WIN_ATOMICOPS_INL_H_ 231cb0ef41Sopenharmony_ci#define UV_WIN_ATOMICOPS_INL_H_ 241cb0ef41Sopenharmony_ci 251cb0ef41Sopenharmony_ci#include "uv.h" 261cb0ef41Sopenharmony_ci#include "internal.h" 271cb0ef41Sopenharmony_ci 281cb0ef41Sopenharmony_ci 291cb0ef41Sopenharmony_ci/* Atomic set operation on char */ 301cb0ef41Sopenharmony_ci#ifdef _MSC_VER /* MSVC */ 311cb0ef41Sopenharmony_ci 321cb0ef41Sopenharmony_ci/* _InterlockedOr8 is supported by MSVC on x32 and x64. It is slightly less 331cb0ef41Sopenharmony_ci * efficient than InterlockedExchange, but InterlockedExchange8 does not exist, 341cb0ef41Sopenharmony_ci * and interlocked operations on larger targets might require the target to be 351cb0ef41Sopenharmony_ci * aligned. */ 361cb0ef41Sopenharmony_ci#pragma intrinsic(_InterlockedOr8) 371cb0ef41Sopenharmony_ci 381cb0ef41Sopenharmony_cistatic char INLINE uv__atomic_exchange_set(char volatile* target) { 391cb0ef41Sopenharmony_ci return _InterlockedOr8(target, 1); 401cb0ef41Sopenharmony_ci} 411cb0ef41Sopenharmony_ci 421cb0ef41Sopenharmony_ci#else /* GCC, Clang in mingw mode */ 431cb0ef41Sopenharmony_ci 441cb0ef41Sopenharmony_cistatic inline char uv__atomic_exchange_set(char volatile* target) { 451cb0ef41Sopenharmony_ci#if defined(__i386__) || defined(__x86_64__) 461cb0ef41Sopenharmony_ci /* Mingw-32 version, hopefully this works for 64-bit gcc as well. */ 471cb0ef41Sopenharmony_ci const char one = 1; 481cb0ef41Sopenharmony_ci char old_value; 491cb0ef41Sopenharmony_ci __asm__ __volatile__ ("lock xchgb %0, %1\n\t" 501cb0ef41Sopenharmony_ci : "=r"(old_value), "=m"(*target) 511cb0ef41Sopenharmony_ci : "0"(one), "m"(*target) 521cb0ef41Sopenharmony_ci : "memory"); 531cb0ef41Sopenharmony_ci return old_value; 541cb0ef41Sopenharmony_ci#else 551cb0ef41Sopenharmony_ci return __sync_fetch_and_or(target, 1); 561cb0ef41Sopenharmony_ci#endif 571cb0ef41Sopenharmony_ci} 581cb0ef41Sopenharmony_ci 591cb0ef41Sopenharmony_ci#endif 601cb0ef41Sopenharmony_ci 611cb0ef41Sopenharmony_ci#endif /* UV_WIN_ATOMICOPS_INL_H_ */ 62