rpcs3/Utilities/VirtualMemory.cpp

41 lines
808 B
C++

#include "stdafx.h"
#include "VirtualMemory.h"
#ifdef _WIN32
#include <Windows.h>
#else
#include <sys/mman.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/types.h>
#endif
namespace memory_helper
{
void* reserve_memory(size_t size)
{
#ifdef _WIN32
return VirtualAlloc(NULL, size, MEM_RESERVE, PAGE_NOACCESS);
#else
return mmap(nullptr, size, PROT_NONE, MAP_ANON | MAP_PRIVATE, -1, 0);
#endif
}
void commit_page_memory(void* pointer, size_t page_size)
{
#ifdef _WIN32
VirtualAlloc((u8*)pointer, page_size, MEM_COMMIT, PAGE_READWRITE);
#else
mprotect((u8*)pointer, page_size, PROT_READ | PROT_WRITE);
#endif
}
void free_reserved_memory(void* pointer, size_t size)
{
#ifdef _WIN32
VirtualFree(pointer, 0, MEM_RELEASE);
#else
munmap(pointer, size);
#endif
}
}