mirror of
https://github.com/hrydgard/ppsspp.git
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90 lines
2.4 KiB
C++
90 lines
2.4 KiB
C++
// Copyright (C) 2003 Dolphin Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0 or later versions.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official SVN repository and contact information can be found at
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// http://code.google.com/p/dolphin-emu/
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#include "ppsspp_config.h"
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#ifdef _WIN32
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#include "MemArena.h"
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#include "CommonWindows.h"
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// Windows mappings need to be on 64K boundaries, due to Alpha legacy.
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size_t MemArena::roundup(size_t x) {
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int gran = sysInfo.dwAllocationGranularity ? sysInfo.dwAllocationGranularity : 0x10000;
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return (x + gran - 1) & ~(gran - 1);
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}
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bool MemArena::GrabMemSpace(size_t size) {
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#if !PPSSPP_PLATFORM(UWP)
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hMemoryMapping = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, 0, (DWORD)(size), NULL);
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GetSystemInfo(&sysInfo);
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#else
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hMemoryMapping = 0;
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#endif
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return true;
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}
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void MemArena::ReleaseSpace() {
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CloseHandle(hMemoryMapping);
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hMemoryMapping = 0;
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}
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void *MemArena::CreateView(s64 offset, size_t size, void *viewbase) {
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size = roundup(size);
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#if PPSSPP_PLATFORM(UWP)
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// We just grabbed some RAM before using RESERVE. This commits it.
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void *ptr = VirtualAllocFromApp(viewbase, size, MEM_COMMIT, PAGE_READWRITE);
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#else
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void *ptr = MapViewOfFileEx(hMemoryMapping, FILE_MAP_ALL_ACCESS, 0, (DWORD)((u64)offset), size, viewbase);
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#endif
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return ptr;
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}
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void MemArena::ReleaseView(s64 offset, void* view, size_t size) {
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#if PPSSPP_PLATFORM(UWP)
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#else
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UnmapViewOfFile(view);
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#endif
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}
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bool MemArena::NeedsProbing() {
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#if PPSSPP_ARCH(32BIT)
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return true;
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#else
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return false;
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#endif
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}
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u8* MemArena::Find4GBBase() {
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// Now, create views in high memory where there's plenty of space.
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#if PPSSPP_ARCH(32BIT)
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// Caller will need to find one in a different way.
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return nullptr;
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#elif PPSSPP_ARCH(64BIT)
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u8 *base = (u8*)VirtualAlloc(0, 0xE1000000, MEM_RESERVE, PAGE_READWRITE);
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if (base) {
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VirtualFree(base, 0, MEM_RELEASE);
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}
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return base;
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#else
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#error Arch not supported
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#endif
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}
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#endif // _WIN32
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