185 lines
4.5 KiB
C++
185 lines
4.5 KiB
C++
// Copyright 2008 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#include <cstddef>
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#include <cstdlib>
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#include <string>
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#include "Common/CommonFuncs.h"
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#include "Common/CommonTypes.h"
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#include "Common/Logging/Log.h"
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#include "Common/MemoryUtil.h"
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#include "Common/MsgHandler.h"
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#ifdef _WIN32
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#include <windows.h>
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#include "Common/StringUtil.h"
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#else
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#include <stdio.h>
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#include <sys/mman.h>
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#include <sys/types.h>
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#if defined __APPLE__ || defined __FreeBSD__ || defined __OpenBSD__
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#include <sys/sysctl.h>
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#elif defined __HAIKU__
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#include <OS.h>
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#else
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#include <sys/sysinfo.h>
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#endif
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#endif
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namespace Common
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{
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// This is purposely not a full wrapper for virtualalloc/mmap, but it
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// provides exactly the primitive operations that Dolphin needs.
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void* AllocateExecutableMemory(size_t size)
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{
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#if defined(_WIN32)
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void* ptr = VirtualAlloc(nullptr, size, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
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#else
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void* ptr =
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mmap(nullptr, size, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANON | MAP_PRIVATE, -1, 0);
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if (ptr == MAP_FAILED)
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ptr = nullptr;
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#endif
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if (ptr == nullptr)
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PanicAlert("Failed to allocate executable memory");
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return ptr;
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}
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void* AllocateMemoryPages(size_t size)
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{
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#ifdef _WIN32
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void* ptr = VirtualAlloc(nullptr, size, MEM_COMMIT, PAGE_READWRITE);
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#else
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void* ptr = mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
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if (ptr == MAP_FAILED)
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ptr = nullptr;
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#endif
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if (ptr == nullptr)
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PanicAlert("Failed to allocate raw memory");
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return ptr;
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}
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void* AllocateAlignedMemory(size_t size, size_t alignment)
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{
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#ifdef _WIN32
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void* ptr = _aligned_malloc(size, alignment);
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#else
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void* ptr = nullptr;
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if (posix_memalign(&ptr, alignment, size) != 0)
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ERROR_LOG(MEMMAP, "Failed to allocate aligned memory");
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#endif
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if (ptr == nullptr)
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PanicAlert("Failed to allocate aligned memory");
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return ptr;
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}
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void FreeMemoryPages(void* ptr, size_t size)
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{
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if (ptr)
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{
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#ifdef _WIN32
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if (!VirtualFree(ptr, 0, MEM_RELEASE))
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PanicAlert("FreeMemoryPages failed!\nVirtualFree: %s", GetLastErrorString().c_str());
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#else
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if (munmap(ptr, size) != 0)
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PanicAlert("FreeMemoryPages failed!\nmunmap: %s", LastStrerrorString().c_str());
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#endif
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}
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}
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void FreeAlignedMemory(void* ptr)
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{
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if (ptr)
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{
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#ifdef _WIN32
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_aligned_free(ptr);
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#else
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free(ptr);
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#endif
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}
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}
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void ReadProtectMemory(void* ptr, size_t size)
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{
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#ifdef _WIN32
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DWORD oldValue;
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if (!VirtualProtect(ptr, size, PAGE_NOACCESS, &oldValue))
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PanicAlert("ReadProtectMemory failed!\nVirtualProtect: %s", GetLastErrorString().c_str());
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#else
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if (mprotect(ptr, size, PROT_NONE) != 0)
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PanicAlert("ReadProtectMemory failed!\nmprotect: %s", LastStrerrorString().c_str());
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#endif
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}
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void WriteProtectMemory(void* ptr, size_t size, bool allowExecute)
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{
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#ifdef _WIN32
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DWORD oldValue;
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if (!VirtualProtect(ptr, size, allowExecute ? PAGE_EXECUTE_READ : PAGE_READONLY, &oldValue))
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PanicAlert("WriteProtectMemory failed!\nVirtualProtect: %s", GetLastErrorString().c_str());
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#else
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if (mprotect(ptr, size, allowExecute ? (PROT_READ | PROT_EXEC) : PROT_READ) != 0)
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PanicAlert("WriteProtectMemory failed!\nmprotect: %s", LastStrerrorString().c_str());
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#endif
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}
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void UnWriteProtectMemory(void* ptr, size_t size, bool allowExecute)
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{
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#ifdef _WIN32
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DWORD oldValue;
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if (!VirtualProtect(ptr, size, allowExecute ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE, &oldValue))
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PanicAlert("UnWriteProtectMemory failed!\nVirtualProtect: %s", GetLastErrorString().c_str());
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#else
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if (mprotect(ptr, size,
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allowExecute ? (PROT_READ | PROT_WRITE | PROT_EXEC) : PROT_WRITE | PROT_READ) != 0)
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{
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PanicAlert("UnWriteProtectMemory failed!\nmprotect: %s", LastStrerrorString().c_str());
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}
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#endif
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}
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size_t MemPhysical()
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{
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#ifdef _WIN32
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MEMORYSTATUSEX memInfo;
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memInfo.dwLength = sizeof(MEMORYSTATUSEX);
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GlobalMemoryStatusEx(&memInfo);
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return memInfo.ullTotalPhys;
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#elif defined __APPLE__ || defined __FreeBSD__ || defined __OpenBSD__
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int mib[2];
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size_t physical_memory;
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mib[0] = CTL_HW;
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#ifdef __APPLE__
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mib[1] = HW_MEMSIZE;
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#elif defined __FreeBSD__
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mib[1] = HW_REALMEM;
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#elif defined __OpenBSD__
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mib[1] = HW_PHYSMEM;
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#endif
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size_t length = sizeof(size_t);
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sysctl(mib, 2, &physical_memory, &length, NULL, 0);
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return physical_memory;
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#elif defined __HAIKU__
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system_info sysinfo;
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get_system_info(&sysinfo);
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return static_cast<size_t>(sysinfo.max_pages * B_PAGE_SIZE);
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#else
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struct sysinfo memInfo;
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sysinfo(&memInfo);
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return (size_t)memInfo.totalram * memInfo.mem_unit;
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#endif
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}
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} // namespace Common
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