mirror of
https://github.com/hrydgard/ppsspp.git
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118 lines
3.1 KiB
C++
118 lines
3.1 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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#if defined(__APPLE__)
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#include <string>
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#include <inttypes.h>
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#include "FileUtil.h"
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#include "MemoryUtil.h"
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#include "MemArena.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 <cerrno>
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#include <cstring>
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#include <mach/mach.h>
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#include <mach/vm_map.h>
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size_t MemArena::roundup(size_t x) {
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return x;
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}
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void MemArena::GrabLowMemSpace(size_t size) {
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vm_size = size;
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kern_return_t retval = vm_allocate(mach_task_self(), &vm_mem, size, VM_FLAGS_ANYWHERE);
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if (retval != KERN_SUCCESS) {
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ERROR_LOG(MEMMAP, "Failed to grab a block of virtual memory");
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} else {
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INFO_LOG(MEMMAP, "Successfully allocated %d bytes at %p", (int)size, (void *)vm_mem);
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}
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}
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void MemArena::ReleaseSpace() {
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vm_deallocate(mach_task_self(), vm_mem, vm_size);
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vm_size = 0;
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vm_mem = 0;
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}
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void *MemArena::CreateView(s64 offset, size_t size, void *base) {
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mach_port_t self = mach_task_self();
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vm_address_t target = (vm_address_t)base;
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uint64_t mask = 0;
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bool anywhere = false;
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vm_address_t source = vm_mem + offset;
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vm_prot_t cur_protection = 0;
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vm_prot_t max_protection = 0;
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kern_return_t retval =
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vm_remap(self, &target, size, mask, anywhere,
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self, source, false,
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&cur_protection, &max_protection, VM_INHERIT_DEFAULT);
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if (retval != KERN_SUCCESS) {
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// 1 == KERN_INVALID_ADDRESS
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// 3 == KERN_NO_SPACE (race?)
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// 4 == KERN_INVALID_ARGUMENT
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ERROR_LOG(MEMMAP, "vm_remap failed (%d) - could not remap from %llx (offset %llx) of size %llx to %p",
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(int)retval, (uint64_t)source, (uint64_t)offset, (uint64_t)size, base);
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return nullptr;
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}
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return (void *)target;
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}
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void MemArena::ReleaseView(void* view, size_t size) {
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vm_address_t addr = (vm_address_t)view;
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vm_deallocate(mach_task_self(), addr, size);
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}
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bool MemArena::NeedsProbing() {
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#if defined(IOS) && PPSSPP_ARCH(64BIT)
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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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#if defined(IOS) && PPSSPP_ARCH(64BIT)
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// The caller will need to do probing, like on 32-bit Windows.
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return nullptr;
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#else
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size_t size;
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#if PPSSPP_ARCH(64BIT)
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size = 0xE1000000;
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#else
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size = 0x10000000;
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#endif
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vm_address_t addr = 0;
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kern_return_t retval = vm_allocate(mach_task_self(), &addr, size, VM_FLAGS_ANYWHERE);
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if (retval == KERN_SUCCESS) {
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// Don't need the memory now, was just probing.
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vm_deallocate(mach_task_self(), addr, size);
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return (u8 *)addr;
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}
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#endif
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return nullptr;
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}
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#endif // __APPLE__
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