1 //===- llvm/Support/Atomic.h - Atomic Operations -----------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file declares the llvm::sys atomic operations. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_SUPPORT_ATOMIC_H 15 #define LLVM_SUPPORT_ATOMIC_H 16 17 #include "llvm/Support/DataTypes.h" 18 19 namespace llvm { 20 namespace sys { 21 void MemoryFence(); 22 23 #ifdef _MSC_VER 24 typedef long cas_flag; 25 #else 26 typedef uint32_t cas_flag; 27 #endif 28 cas_flag CompareAndSwap(volatile cas_flag* ptr, 29 cas_flag new_value, 30 cas_flag old_value); 31 cas_flag AtomicIncrement(volatile cas_flag* ptr); 32 cas_flag AtomicDecrement(volatile cas_flag* ptr); 33 cas_flag AtomicAdd(volatile cas_flag* ptr, cas_flag val); 34 cas_flag AtomicMul(volatile cas_flag* ptr, cas_flag val); 35 cas_flag AtomicDiv(volatile cas_flag* ptr, cas_flag val); 36 } 37 } 38 39 #endif 40