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46 lines
973 B
C++
46 lines
973 B
C++
#include "stdafx.h"
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#include "Utilities/Log.h"
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#include "VirtualMemory.h"
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#ifdef _WIN32
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#include <Windows.h>
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#else
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <sys/types.h>
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#endif
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namespace memory_helper
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{
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void* reserve_memory(size_t size)
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{
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#ifdef _WIN32
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void* ret = VirtualAlloc(NULL, size, MEM_RESERVE, PAGE_NOACCESS);
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ENSURES(ret != NULL);
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#else
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void* ret = mmap(nullptr, size, PROT_NONE, MAP_ANON | MAP_PRIVATE, -1, 0);
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ENSURES(ret != 0);
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#endif
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return ret;
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}
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void commit_page_memory(void* pointer, size_t size)
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{
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#ifdef _WIN32
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VERIFY(VirtualAlloc(pointer, size, MEM_COMMIT, PAGE_READWRITE) != NULL);
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#else
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VERIFY(mprotect((void*)((u64)pointer & -4096), size, PROT_READ | PROT_WRITE) != -1);
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#endif
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}
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void free_reserved_memory(void* pointer, size_t size)
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{
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#ifdef _WIN32
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VERIFY(VirtualFree(pointer, 0, MEM_DECOMMIT) != 0);
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#else
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VERIFY(mprotect(pointer, size, PROT_NONE) != -1);
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#endif
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}
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}
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