mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-12-13 08:21:16 +01:00
155 lines
6.1 KiB
C++
155 lines
6.1 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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namespace ams::fssystem {
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namespace {
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constexpr bool UseDefaultAllocators = false;
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constinit bool g_used_default_allocator = false;
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void *DefaultAllocate(size_t size) {
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g_used_default_allocator = true;
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return ams::Malloc(size);
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}
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void DefaultDeallocate(void *ptr, size_t size) {
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AMS_UNUSED(size);
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ams::Free(ptr);
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}
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constinit os::SdkMutex g_allocate_mutex;
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constinit os::SdkMutex g_allocate_mutex_for_system;
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constinit AllocateFunction g_allocate_func = UseDefaultAllocators ? DefaultAllocate : nullptr;
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constinit DeallocateFunction g_deallocate_func = UseDefaultAllocators ? DefaultDeallocate : nullptr;
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constinit AllocateFunction g_allocate_func_for_system = nullptr;
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constinit DeallocateFunction g_deallocate_func_for_system = nullptr;
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void *AllocateUnsafe(size_t size) {
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/* Check pre-conditions. */
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AMS_ASSERT(g_allocate_mutex.IsLockedByCurrentThread());
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AMS_ASSERT(g_allocate_func != nullptr);
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/* Allocate memory. */
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return g_allocate_func(size);
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}
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void DeallocateUnsafe(void *ptr, size_t size) {
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/* Check pre-conditions. */
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AMS_ASSERT(g_allocate_mutex.IsLockedByCurrentThread());
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AMS_ASSERT(g_deallocate_func != nullptr);
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/* Deallocate the pointer. */
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g_deallocate_func(ptr, size);
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}
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}
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namespace impl {
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/* Normal allocator set. */
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template<> void *AllocatorFunctionSet<false>::Allocate(size_t size) { return ::ams::fssystem::Allocate(size); }
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template<> void *AllocatorFunctionSet<false>::AllocateUnsafe(size_t size) { return ::ams::fssystem::AllocateUnsafe(size); }
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template<> void AllocatorFunctionSet<false>::Deallocate(void *ptr, size_t size) { return ::ams::fssystem::Deallocate(ptr, size); }
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template<> void AllocatorFunctionSet<false>::DeallocateUnsafe(void *ptr, size_t size) { return ::ams::fssystem::DeallocateUnsafe(ptr, size); }
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template<> void AllocatorFunctionSet<false>::LockAllocatorMutex() { ::ams::fssystem::g_allocate_mutex.Lock(); }
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template<> void AllocatorFunctionSet<false>::UnlockAllocatorMutex() { ::ams::fssystem::g_allocate_mutex.Unlock(); }
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/* System allocator set. */
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template<> void *AllocatorFunctionSet<true>::AllocateUnsafe(size_t size) {
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/* Check pre-conditions. */
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AMS_ASSERT(::ams::fssystem::g_allocate_mutex_for_system.IsLockedByCurrentThread());
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AMS_ASSERT(::ams::fssystem::g_allocate_func_for_system != nullptr);
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/* Allocate memory. */
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return g_allocate_func_for_system(size);
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}
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template<> void AllocatorFunctionSet<true>::DeallocateUnsafe(void *ptr, size_t size) {
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/* Check pre-conditions. */
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AMS_ASSERT(::ams::fssystem::g_allocate_mutex_for_system.IsLockedByCurrentThread());
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AMS_ASSERT(::ams::fssystem::g_deallocate_func_for_system != nullptr);
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/* Deallocate the pointer. */
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::ams::fssystem::g_deallocate_func_for_system(ptr, size);
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}
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template<> void *AllocatorFunctionSet<true>::Allocate(size_t size) {
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std::scoped_lock lk(::ams::fssystem::g_allocate_mutex_for_system);
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return ::ams::fssystem::impl::AllocatorFunctionSet<true>::AllocateUnsafe(size);
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}
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template<> void AllocatorFunctionSet<true>::Deallocate(void *ptr, size_t size) {
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std::scoped_lock lk(::ams::fssystem::g_allocate_mutex_for_system);
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return ::ams::fssystem::impl::AllocatorFunctionSet<true>::DeallocateUnsafe(ptr, size);
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}
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template<> void AllocatorFunctionSet<true>::LockAllocatorMutex() { ::ams::fssystem::g_allocate_mutex_for_system.Lock(); }
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template<> void AllocatorFunctionSet<true>::UnlockAllocatorMutex() { ::ams::fssystem::g_allocate_mutex_for_system.Unlock(); }
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}
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void *Allocate(size_t size) {
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std::scoped_lock lk(g_allocate_mutex);
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return AllocateUnsafe(size);
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}
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void Deallocate(void *ptr, size_t size) {
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std::scoped_lock lk(g_allocate_mutex);
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return DeallocateUnsafe(ptr, size);
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}
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void InitializeAllocator(AllocateFunction allocate_func, DeallocateFunction deallocate_func) {
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/* Check pre-conditions. */
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AMS_ASSERT(allocate_func != nullptr);
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AMS_ASSERT(deallocate_func != nullptr);
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/* Check that we can initialize. */
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if constexpr (UseDefaultAllocators) {
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AMS_ASSERT(g_used_default_allocator == false);
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} else {
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AMS_ASSERT(g_allocate_func == nullptr);
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AMS_ASSERT(g_deallocate_func == nullptr);
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}
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/* Set the allocator functions. */
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g_allocate_func = allocate_func;
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g_deallocate_func = deallocate_func;
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}
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void InitializeAllocatorForSystem(AllocateFunction allocate_func, DeallocateFunction deallocate_func) {
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/* Check pre-conditions. */
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AMS_ASSERT(allocate_func != nullptr);
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AMS_ASSERT(deallocate_func != nullptr);
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/* Check that we can initialize. */
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AMS_ASSERT(g_allocate_func_for_system == nullptr);
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AMS_ASSERT(g_deallocate_func_for_system == nullptr);
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/* Set the system allocator functions. */
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g_allocate_func_for_system = allocate_func;
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g_deallocate_func_for_system = deallocate_func;
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}
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}
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