src/llvm/include/llvm/Support/Atomic.h

   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