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-rw-r--r--src/common/CMakeLists.txt2
-rw-r--r--src/common/mem_arena.cpp394
-rw-r--r--src/common/mem_arena.h70
3 files changed, 0 insertions, 466 deletions
diff --git a/src/common/CMakeLists.txt b/src/common/CMakeLists.txt
index b5b129a09..11659c3c5 100644
--- a/src/common/CMakeLists.txt
+++ b/src/common/CMakeLists.txt
@@ -10,7 +10,6 @@ set(SRCS
logging/text_formatter.cpp
logging/backend.cpp
math_util.cpp
- mem_arena.cpp
memory_util.cpp
misc.cpp
profiler.cpp
@@ -43,7 +42,6 @@ set(HEADERS
logging/backend.h
make_unique.h
math_util.h
- mem_arena.h
memory_util.h
platform.h
profiler.h
diff --git a/src/common/mem_arena.cpp b/src/common/mem_arena.cpp
deleted file mode 100644
index 689fdb92b..000000000
--- a/src/common/mem_arena.cpp
+++ /dev/null
@@ -1,394 +0,0 @@
-// 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 <string>
-
-#include "common/logging/log.h"
-#include "common/mem_arena.h"
-#include "common/memory_util.h"
-#include "common/platform.h"
-#include "common/string_util.h"
-
-#ifndef _WIN32
-#include <fcntl.h>
-#include <string.h>
-#include <unistd.h>
-
-#ifdef ANDROID
-#include <sys/ioctl.h>
-#include <linux/ashmem.h>
-#endif
-#endif
-
-#ifdef ANDROID
-
-// Hopefully this ABI will never change...
-
-
-#define ASHMEM_DEVICE "/dev/ashmem"
-
-/*
-* ashmem_create_region - creates a new ashmem region and returns the file
-* descriptor, or <0 on error
-*
-* `name' is an optional label to give the region (visible in /proc/pid/maps)
-* `size' is the size of the region, in page-aligned bytes
-*/
-int ashmem_create_region(const char *name, size_t size)
-{
- int fd, ret;
-
- fd = open(ASHMEM_DEVICE, O_RDWR);
- if (fd < 0)
- return fd;
-
- if (name) {
- char buf[ASHMEM_NAME_LEN];
-
- strncpy(buf, name, sizeof(buf));
- ret = ioctl(fd, ASHMEM_SET_NAME, buf);
- if (ret < 0)
- goto error;
- }
-
- ret = ioctl(fd, ASHMEM_SET_SIZE, size);
- if (ret < 0)
- goto error;
-
- return fd;
-
-error:
- LOG_ERROR(Common_Memory, "NASTY ASHMEM ERROR: ret = %08x", ret);
- close(fd);
- return ret;
-}
-
-int ashmem_set_prot_region(int fd, int prot)
-{
- return ioctl(fd, ASHMEM_SET_PROT_MASK, prot);
-}
-
-int ashmem_pin_region(int fd, size_t offset, size_t len)
-{
- struct ashmem_pin pin = { offset, len };
- return ioctl(fd, ASHMEM_PIN, &pin);
-}
-
-int ashmem_unpin_region(int fd, size_t offset, size_t len)
-{
- struct ashmem_pin pin = { offset, len };
- return ioctl(fd, ASHMEM_UNPIN, &pin);
-}
-#endif // Android
-
-
-#if defined(_WIN32)
-SYSTEM_INFO sysInfo;
-#endif
-
-
-// Windows mappings need to be on 64K boundaries, due to Alpha legacy.
-#ifdef _WIN32
-size_t roundup(size_t x) {
- int gran = sysInfo.dwAllocationGranularity ? sysInfo.dwAllocationGranularity : 0x10000;
- return (x + gran - 1) & ~(gran - 1);
-}
-#else
-size_t roundup(size_t x) {
- return x;
-}
-#endif
-
-
-void MemArena::GrabLowMemSpace(size_t size)
-{
-#ifdef _WIN32
- hMemoryMapping = CreateFileMapping(INVALID_HANDLE_VALUE, nullptr, PAGE_READWRITE, 0, (DWORD)(size), nullptr);
- GetSystemInfo(&sysInfo);
-#elif defined(ANDROID)
- // Use ashmem so we don't have to allocate a file on disk!
- fd = ashmem_create_region("Citra_RAM", size);
- // Note that it appears that ashmem is pinned by default, so no need to pin.
- if (fd < 0)
- {
- LOG_ERROR(Common_Memory, "Failed to grab ashmem space of size: %08x errno: %d", (int)size, (int)(errno));
- return;
- }
-#else
- // Try to find a non-existing filename for our shared memory.
- // In most cases the first one will be available, but it's nicer to search
- // a bit more.
- for (int i = 0; i < 10000; i++)
- {
- std::string file_name = Common::StringFromFormat("/citramem.%d", i);
- fd = shm_open(file_name.c_str(), O_RDWR | O_CREAT | O_EXCL, 0600);
- if (fd != -1)
- {
- shm_unlink(file_name.c_str());
- break;
- }
- else if (errno != EEXIST)
- {
- LOG_ERROR(Common_Memory, "shm_open failed: %s", strerror(errno));
- return;
- }
- }
- if (ftruncate(fd, size) < 0)
- LOG_ERROR(Common_Memory, "Failed to allocate low memory space");
-#endif
-}
-
-
-void MemArena::ReleaseSpace()
-{
-#ifdef _WIN32
- CloseHandle(hMemoryMapping);
- hMemoryMapping = 0;
-#else
- close(fd);
-#endif
-}
-
-
-void *MemArena::CreateView(s64 offset, size_t size, void *base)
-{
-#ifdef _WIN32
- size = roundup(size);
- void *ptr = MapViewOfFileEx(hMemoryMapping, FILE_MAP_ALL_ACCESS, 0, (DWORD)((u64)offset), size, base);
- return ptr;
-#else
- void *retval = mmap(base, size, PROT_READ | PROT_WRITE, MAP_SHARED |
- // Do not sync memory to underlying file. Linux has this by default.
-#ifdef __FreeBSD__
- MAP_NOSYNC |
-#endif
- ((base == nullptr) ? 0 : MAP_FIXED), fd, offset);
-
- if (retval == MAP_FAILED)
- {
- LOG_ERROR(Common_Memory, "mmap failed");
- return nullptr;
- }
- return retval;
-#endif
-}
-
-
-void MemArena::ReleaseView(void* view, size_t size)
-{
-#ifdef _WIN32
- UnmapViewOfFile(view);
-#else
- munmap(view, size);
-#endif
-}
-
-u8* MemArena::Find4GBBase()
-{
-#if EMU_ARCH_BITS == 64
-#ifdef _WIN32
- // 64 bit
- u8* base = (u8*)VirtualAlloc(0, 0xE1000000, MEM_RESERVE, PAGE_READWRITE);
- VirtualFree(base, 0, MEM_RELEASE);
- return base;
-#else
- // Very precarious - mmap cannot return an error when trying to map already used pages.
- // This makes the Windows approach above unusable on Linux, so we will simply pray...
- return reinterpret_cast<u8*>(0x2300000000ULL);
-#endif
-
-#else // 32 bit
-
-#ifdef _WIN32
- u8* base = (u8*)VirtualAlloc(0, 0x10000000, MEM_RESERVE, PAGE_READWRITE);
- if (base) {
- VirtualFree(base, 0, MEM_RELEASE);
- }
- return base;
-#else
- void* base = mmap(0, 0x10000000, PROT_READ | PROT_WRITE,
- MAP_ANON | MAP_SHARED, -1, 0);
- if (base == MAP_FAILED) {
- LOG_ERROR(Common_Memory, "Failed to map 256 MB of memory space: %s", strerror(errno));
- return 0;
- }
- munmap(base, 0x10000000);
- return static_cast<u8*>(base);
-#endif
-#endif
-}
-
-
-// yeah, this could also be done in like two bitwise ops...
-#define SKIP(a_flags, b_flags)
-//if (!(a_flags & MV_WII_ONLY) && (b_flags & MV_WII_ONLY))
-// continue;
-//if (!(a_flags & MV_FAKE_VMEM) && (b_flags & MV_FAKE_VMEM))
-// continue;
-
-static bool Memory_TryBase(u8 *base, const MemoryView *views, int num_views, u32 flags, MemArena *arena) {
- // OK, we know where to find free space. Now grab it!
- // We just mimic the popular BAT setup.
- size_t position = 0;
- size_t last_position = 0;
-
- // Zero all the pointers to be sure.
- for (int i = 0; i < num_views; i++)
- {
- if (views[i].out_ptr_low)
- *views[i].out_ptr_low = 0;
- if (views[i].out_ptr)
- *views[i].out_ptr = 0;
- }
-
- int i;
- for (i = 0; i < num_views; i++)
- {
- const MemoryView &view = views[i];
- if (view.size == 0)
- continue;
- SKIP(flags, view.flags);
- if (view.flags & MV_MIRROR_PREVIOUS) {
- position = last_position;
- }
- else {
- *(view.out_ptr_low) = (u8*)arena->CreateView(position, view.size);
- if (!*view.out_ptr_low)
- goto bail;
- }
-#if EMU_ARCH_BITS == 64
- *view.out_ptr = (u8*)arena->CreateView(
- position, view.size, base + view.virtual_address);
-#else
- if (view.flags & MV_MIRROR_PREVIOUS) { // TODO: should check if the two & 0x3FFFFFFF are identical.
- // No need to create multiple identical views.
- *view.out_ptr = *views[i - 1].out_ptr;
- }
- else {
- *view.out_ptr = (u8*)arena->CreateView(
- position, view.size, base + (view.virtual_address & 0x3FFFFFFF));
- if (!*view.out_ptr)
- goto bail;
- }
-#endif
-
- last_position = position;
- position += roundup(view.size);
- }
-
- return true;
-
-bail:
- // Argh! ERROR! Free what we grabbed so far so we can try again.
- for (int j = 0; j <= i; j++)
- {
- if (views[i].size == 0)
- continue;
- SKIP(flags, views[i].flags);
- if (views[j].out_ptr_low && *views[j].out_ptr_low)
- {
- arena->ReleaseView(*views[j].out_ptr_low, views[j].size);
- *views[j].out_ptr_low = nullptr;
- }
- if (*views[j].out_ptr)
- {
-#if EMU_ARCH_BITS == 64
- arena->ReleaseView(*views[j].out_ptr, views[j].size);
-#else
- if (!(views[j].flags & MV_MIRROR_PREVIOUS))
- {
- arena->ReleaseView(*views[j].out_ptr, views[j].size);
- }
-#endif
- *views[j].out_ptr = nullptr;
- }
- }
- return false;
-}
-
-u8 *MemoryMap_Setup(const MemoryView *views, int num_views, u32 flags, MemArena *arena)
-{
- size_t total_mem = 0;
- int base_attempts = 0;
-
- for (int i = 0; i < num_views; i++)
- {
- if (views[i].size == 0)
- continue;
- SKIP(flags, views[i].flags);
- if ((views[i].flags & MV_MIRROR_PREVIOUS) == 0)
- total_mem += roundup(views[i].size);
- }
- // Grab some pagefile backed memory out of the void ...
- arena->GrabLowMemSpace(total_mem);
-
- // Now, create views in high memory where there's plenty of space.
-#if EMU_ARCH_BITS == 64
- u8 *base = MemArena::Find4GBBase();
- // This really shouldn't fail - in 64-bit, there will always be enough
- // address space.
- if (!Memory_TryBase(base, views, num_views, flags, arena))
- {
- LOG_ERROR(Common_Memory, "MemoryMap_Setup: Failed finding a memory base.");
- return 0;
- }
-#elif defined(_WIN32)
- // Try a whole range of possible bases. Return once we got a valid one.
- u32 max_base_addr = 0x7FFF0000 - 0x10000000;
- u8 *base = nullptr;
-
- for (u32 base_addr = 0x01000000; base_addr < max_base_addr; base_addr += 0x400000)
- {
- base_attempts++;
- base = (u8 *)base_addr;
- if (Memory_TryBase(base, views, num_views, flags, arena))
- {
- LOG_DEBUG(Common_Memory, "Found valid memory base at %p after %i tries.", base, base_attempts);
- base_attempts = 0;
- break;
- }
- }
-#else
- // Linux32 is fine with the x64 method, although limited to 32-bit with no automirrors.
- u8 *base = MemArena::Find4GBBase();
- if (!Memory_TryBase(base, views, num_views, flags, arena))
- {
- LOG_ERROR(Common_Memory, "MemoryMap_Setup: Failed finding a memory base.");
- return 0;
- }
-#endif
- if (base_attempts)
- LOG_ERROR(Common_Memory, "No possible memory base pointer found!");
- return base;
-}
-
-void MemoryMap_Shutdown(const MemoryView *views, int num_views, u32 flags, MemArena *arena)
-{
- for (int i = 0; i < num_views; i++)
- {
- if (views[i].size == 0)
- continue;
- SKIP(flags, views[i].flags);
- if (views[i].out_ptr_low && *views[i].out_ptr_low)
- arena->ReleaseView(*views[i].out_ptr_low, views[i].size);
- if (*views[i].out_ptr && (views[i].out_ptr_low && *views[i].out_ptr != *views[i].out_ptr_low))
- arena->ReleaseView(*views[i].out_ptr, views[i].size);
- *views[i].out_ptr = nullptr;
- if (views[i].out_ptr_low)
- *views[i].out_ptr_low = nullptr;
- }
-}
diff --git a/src/common/mem_arena.h b/src/common/mem_arena.h
deleted file mode 100644
index d514fe58c..000000000
--- a/src/common/mem_arena.h
+++ /dev/null
@@ -1,70 +0,0 @@
-// 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/
-
-#pragma once
-
-#ifdef _WIN32
-#include <windows.h>
-#endif
-
-#include "common/common_types.h"
-
-// This class lets you create a block of anonymous RAM, and then arbitrarily map views into it.
-// Multiple views can mirror the same section of the block, which makes it very convient for emulating
-// memory mirrors.
-
-class MemArena
-{
-public:
- void GrabLowMemSpace(size_t size);
- void ReleaseSpace();
- void *CreateView(s64 offset, size_t size, void *base = 0);
- void ReleaseView(void *view, size_t size);
-
- // This only finds 1 GB in 32-bit
- static u8 *Find4GBBase();
-private:
-
-#ifdef _WIN32
- HANDLE hMemoryMapping;
-#else
- int fd;
-#endif
-};
-
-enum {
- MV_MIRROR_PREVIOUS = 1,
- // MV_FAKE_VMEM = 2,
- // MV_WII_ONLY = 4,
- MV_IS_PRIMARY_RAM = 0x100,
- MV_IS_EXTRA1_RAM = 0x200,
- MV_IS_EXTRA2_RAM = 0x400,
-};
-
-struct MemoryView
-{
- u8 **out_ptr_low;
- u8 **out_ptr;
- u32 virtual_address;
- u32 size;
- u32 flags;
-};
-
-// Uses a memory arena to set up an emulator-friendly memory map according to
-// a passed-in list of MemoryView structures.
-u8 *MemoryMap_Setup(const MemoryView *views, int num_views, u32 flags, MemArena *arena);
-void MemoryMap_Shutdown(const MemoryView *views, int num_views, u32 flags, MemArena *arena);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-21 22:22:13 +0100