Memory.h

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//===- llvm/Support/Memory.h - Memory Support --------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file declares the llvm::sys::Memory class.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_SYSTEM_MEMORY_H
#define LLVM_SYSTEM_MEMORY_H

#include "llvm/Support/DataTypes.h"
#include <string>

namespace llvm {
namespace sys {

  class MemoryBlock {
  public:
    MemoryBlock() : Address(0), Size(0) { }
    MemoryBlock(void *addr, size_t size) : Address(addr), Size(size) { }
    void *base() const { return Address; }
    size_t size() const { return Size; }
  private:
    void *Address;    
    size_t Size;      
    friend class Memory;
  };

  class Memory {
  public:
    static MemoryBlock AllocateRWX(size_t NumBytes,
                                   const MemoryBlock *NearBlock,
                                   std::string *ErrMsg = 0);

    static bool ReleaseRWX(MemoryBlock &block, std::string *ErrMsg = 0);


    static void InvalidateInstructionCache(const void *Addr, size_t Len);

    static bool setExecutable(MemoryBlock &M, std::string *ErrMsg = 0);

    static bool setWritable(MemoryBlock &M, std::string *ErrMsg = 0);

    static bool setRangeExecutable(const void *Addr, size_t Size);

    static bool setRangeWritable(const void *Addr, size_t Size);
  };
}
}

#endif

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