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43 lines
983 B
C++
43 lines
983 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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return verify("reserve_memory" HERE, VirtualAlloc(NULL, size, MEM_RESERVE, PAGE_NOACCESS));
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#else
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return verify("reserve_memory" HERE, ::mmap(nullptr, size, PROT_NONE, MAP_ANON | MAP_PRIVATE, -1, 0));
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#endif
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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(HERE), VirtualAlloc(pointer, size, MEM_COMMIT, PAGE_READWRITE);
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#else
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verify(HERE), ::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(HERE), VirtualFree(pointer, 0, MEM_DECOMMIT);
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#else
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verify(HERE), ::mprotect(pointer, size, PROT_NONE) != -1;
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#endif
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}
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}
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