dolphin/Source/Core/Common/MemoryUtil.h

// Copyright 2008 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.

#pragma once

#include <cstddef>
#include <string>

namespace Common
{
void* AllocateExecutableMemory(size_t size);

// These two functions control the executable/writable state of the W^X memory
// allocations. More detailed documentation about them is in the .cpp file.
// In general where applicable the ScopedJITPageWriteAndNoExecute wrapper
// should be used to prevent bugs from not pairing up the calls properly.

// Allows a thread to write to executable memory, but not execute the data.
void JITPageWriteEnableExecuteDisable();
// Allows a thread to execute memory allocated for execution, but not write to it.
void JITPageWriteDisableExecuteEnable();
// RAII Wrapper around JITPageWrite*Execute*(). When this is in scope the thread can
// write to executable memory but not execute it.
struct ScopedJITPageWriteAndNoExecute
{
  ScopedJITPageWriteAndNoExecute() { JITPageWriteEnableExecuteDisable(); }
  ~ScopedJITPageWriteAndNoExecute() { JITPageWriteDisableExecuteEnable(); }
};
void* AllocateMemoryPages(size_t size);
void FreeMemoryPages(void* ptr, size_t size);
void* AllocateAlignedMemory(size_t size, size_t alignment);
void FreeAlignedMemory(void* ptr);
void ReadProtectMemory(void* ptr, size_t size);
void WriteProtectMemory(void* ptr, size_t size, bool executable = false);
void UnWriteProtectMemory(void* ptr, size_t size, bool allowExecute = false);
size_t MemPhysical();

}  // namespace Common