mirror of
https://github.com/hrydgard/ppsspp.git
synced 2024-11-23 13:30:02 +00:00
89 lines
2.4 KiB
C++
89 lines
2.4 KiB
C++
// Copyright (C) 2003 Dolphin Project.
|
|
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, version 2.0 or later versions.
|
|
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License 2.0 for more details.
|
|
|
|
// A copy of the GPL 2.0 should have been included with the program.
|
|
// If not, see http://www.gnu.org/licenses/
|
|
|
|
// Official SVN repository and contact information can be found at
|
|
// http://code.google.com/p/dolphin-emu/
|
|
|
|
#include "ppsspp_config.h"
|
|
|
|
#ifdef _WIN32
|
|
|
|
#include "MemArena.h"
|
|
#include "CommonWindows.h"
|
|
|
|
// Windows mappings need to be on 64K boundaries, due to Alpha legacy.
|
|
size_t MemArena::roundup(size_t x) {
|
|
int gran = sysInfo.dwAllocationGranularity ? sysInfo.dwAllocationGranularity : 0x10000;
|
|
return (x + gran - 1) & ~(gran - 1);
|
|
}
|
|
|
|
void MemArena::GrabLowMemSpace(size_t size) {
|
|
#if !PPSSPP_PLATFORM(UWP)
|
|
hMemoryMapping = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, 0, (DWORD)(size), NULL);
|
|
GetSystemInfo(&sysInfo);
|
|
#else
|
|
hMemoryMapping = 0;
|
|
#endif
|
|
}
|
|
|
|
void MemArena::ReleaseSpace() {
|
|
CloseHandle(hMemoryMapping);
|
|
hMemoryMapping = 0;
|
|
}
|
|
|
|
void *MemArena::CreateView(s64 offset, size_t size, void *viewbase) {
|
|
size = roundup(size);
|
|
#if PPSSPP_PLATFORM(UWP)
|
|
// We just grabbed some RAM before using RESERVE. This commits it.
|
|
void *ptr = VirtualAllocFromApp(viewbase, size, MEM_COMMIT, PAGE_READWRITE);
|
|
#else
|
|
void *ptr = MapViewOfFileEx(hMemoryMapping, FILE_MAP_ALL_ACCESS, 0, (DWORD)((u64)offset), size, viewbase);
|
|
#endif
|
|
return ptr;
|
|
}
|
|
|
|
void MemArena::ReleaseView(void* view, size_t size) {
|
|
#if PPSSPP_PLATFORM(UWP)
|
|
#else
|
|
UnmapViewOfFile(view);
|
|
#endif
|
|
}
|
|
|
|
bool MemArena::NeedsProbing() {
|
|
#if PPSSPP_ARCH(32BIT)
|
|
return true;
|
|
#else
|
|
return false;
|
|
#endif
|
|
}
|
|
|
|
u8* MemArena::Find4GBBase() {
|
|
// Now, create views in high memory where there's plenty of space.
|
|
#if PPSSPP_ARCH(32BIT)
|
|
// Caller will need to find one in a different way.
|
|
return nullptr;
|
|
|
|
#elif PPSSPP_ARCH(64BIT)
|
|
u8 *base = (u8*)VirtualAlloc(0, 0xE1000000, MEM_RESERVE, PAGE_READWRITE);
|
|
if (base) {
|
|
VirtualFree(base, 0, MEM_RELEASE);
|
|
}
|
|
return base;
|
|
#else
|
|
#error Arch not supported
|
|
#endif
|
|
}
|
|
|
|
#endif // _WIN32
|