mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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177 lines
No EOL
5.1 KiB
C++
177 lines
No EOL
5.1 KiB
C++
/*
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* Copyright (c) Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stratosphere.hpp>
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/* NOTE: If AMS_INIT_USE_STANDARD_ALLOCATOR_FOR_MALLOC is defined, the relevant os primitives should be hooked up. */
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#if defined(ATMOSPHERE_OS_HORIZON)
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#define AMS_INIT_USE_STANDARD_ALLOCATOR_FOR_MALLOC
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#elif defined(ATMOSPHERE_OS_WINDOWS)
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//#define AMS_INIT_USE_STANDARD_ALLOCATOR_FOR_MALLOC
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#elif defined(ATMOSPHERE_OS_LINUX)
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//#define AMS_INIT_USE_STANDARD_ALLOCATOR_FOR_MALLOC
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#elif defined(ATMOSPHERE_OS_MACOS)
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//#define AMS_INIT_USE_STANDARD_ALLOCATOR_FOR_MALLOC
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#else
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#error "Unknown OS for enabling StandardAllocator backing impl for malloc"
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#endif
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namespace ams::init {
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namespace {
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#if defined(AMS_INIT_USE_STANDARD_ALLOCATOR_FOR_MALLOC)
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constinit void *g_malloc_region_address = nullptr;
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constinit size_t g_malloc_region_size = 0;
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constinit util::TypedStorage<mem::StandardAllocator> g_malloc_allocator = {};
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#endif
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}
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void InitializeAllocator(void *address, size_t size, bool cache_enabled) {
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#if defined(AMS_INIT_USE_STANDARD_ALLOCATOR_FOR_MALLOC)
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/* Check pre-conditions. */
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AMS_ABORT_UNLESS(g_malloc_region_size == 0);
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AMS_ABORT_UNLESS(size > 0);
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/* Construct malloc allocator. */
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util::ConstructAt(g_malloc_allocator);
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/* Initialize allocator. */
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util::GetReference(g_malloc_allocator).Initialize(address, size, cache_enabled);
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/* Set malloc globals. */
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g_malloc_region_address = address;
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g_malloc_region_size = size;
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#else
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AMS_UNUSED(address, size, cache_enabled);
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#endif
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}
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void InitializeAllocator(void *address, size_t size) {
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return InitializeAllocator(address, size, false);
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}
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void InitializeDefaultAllocator() {
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/* TODO: What should default heap size be? This uses virtual address space memory. */
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return InitializeAllocator(nullptr, 128_MB, false);
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}
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mem::StandardAllocator *GetAllocator() {
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#if defined(AMS_INIT_USE_STANDARD_ALLOCATOR_FOR_MALLOC)
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/* Check pre-conditions. */
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AMS_ASSERT(g_malloc_region_size > 0);
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return util::GetPointer(g_malloc_allocator);
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#else
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return nullptr;
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#endif
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}
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}
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#if defined(AMS_INIT_USE_STANDARD_ALLOCATOR_FOR_MALLOC)
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extern "C" void *malloc(size_t size) {
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/* We require that an allocator region exists. */
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if (::ams::init::g_malloc_region_size == 0) {
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return nullptr;
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}
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/* Try to allocate. */
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void *ptr = ::ams::util::GetReference(::ams::init::g_malloc_allocator).Allocate(size);
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if (ptr == nullptr) {
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errno = ENOMEM;
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}
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return ptr;
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}
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extern "C" void free(void *ptr) {
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/* We require that an allocator region exists. */
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if (::ams::init::g_malloc_region_size == 0) {
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return;
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}
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if (ptr != nullptr) {
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::ams::util::GetReference(::ams::init::g_malloc_allocator).Free(ptr);
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}
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}
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extern "C" void *calloc(size_t num, size_t size) {
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/* We require that an allocator region exists. */
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if (::ams::init::g_malloc_region_size == 0) {
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return nullptr;
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}
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/* Allocate the total needed space. */
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const size_t total = num * size;
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void *ptr = std::malloc(total);
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/* Zero the memory if needed. */
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if (ptr != nullptr) {
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std::memset(ptr, 0, total);
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} else {
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errno = ENOMEM;
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}
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return ptr;
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}
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extern "C" void *realloc(void *ptr, size_t new_size) {
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/* We require that an allocator region exists. */
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if (::ams::init::g_malloc_region_size == 0) {
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return nullptr;
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}
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/* Try to reallocate. */
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void *r = ::ams::util::GetReference(::ams::init::g_malloc_allocator).Reallocate(ptr, new_size);
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if (r == nullptr) {
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errno = ENOMEM;
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}
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return r;
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}
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extern "C" void *aligned_alloc(size_t align, size_t size) {
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/* We require that an allocator region exists. */
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if (::ams::init::g_malloc_region_size == 0) {
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return nullptr;
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}
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/* Try to allocate. */
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void *ptr = ::ams::util::GetReference(::ams::init::g_malloc_allocator).Allocate(size, align);
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if (ptr == nullptr) {
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errno = ENOMEM;
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}
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return ptr;
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}
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extern "C" size_t malloc_usable_size(void *ptr) {
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/* We require that an allocator region exists. */
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if (::ams::init::g_malloc_region_size == 0) {
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return 0;
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}
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/* Try to get the usable size. */
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if (ptr == nullptr) {
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errno = ENOMEM;
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return 0;
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}
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return ::ams::util::GetReference(::ams::init::g_malloc_allocator).GetSizeOf(ptr);
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}
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#endif |