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fssystem: revise allocator logic for latest semantics

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This commit is contained in:
Michael Scire 2021-12-07 13:35:45 -08:00 committed by SciresM
parent 28ea6555f8
commit ccf29a1302
3 changed files with 173 additions and 34 deletions
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100
libraries/libstratosphere/include/stratosphere/fssystem/fssystem_allocator_utility.hpp
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@ -16,50 +16,100 @@
#pragma once
#include <vapours.hpp>
/* Forward declare ams::fs allocate shared. */
namespace ams::fs::impl {
template<typename T, template<typename, typename> class AllocatorTemplateT, typename Impl, typename... Args>
std::shared_ptr<T> AllocateSharedImpl(Args &&... args);
}
namespace ams::fssystem {
using AllocateFunction = void *(*)(size_t size);
using DeallocateFunction = void (*)(void *ptr, size_t size);
void InitializeAllocator(AllocateFunction allocate_func, DeallocateFunction deallocate_func);
void InitializeAllocatorForSystem(AllocateFunction allocate_func, DeallocateFunction deallocate_func);
void *Allocate(size_t size);
void Deallocate(void *ptr, size_t size);
template<typename T>
class StdAllocator : public std::allocator<T> {
public:
StdAllocator() = default;
StdAllocator(const StdAllocator &) = default;
template<class U>
StdAllocator(const StdAllocator<U> &) : std::allocator<T>() { /* ... */ };
namespace impl {
template<typename U>
struct rebind {
using other = StdAllocator<U>;
};
template<bool ForSystem>
class AllocatorFunctionSet {
public:
static void *Allocate(size_t size);
static void *AllocateUnsafe(size_t size);
T *Allocate(size_t size, const T *hint = nullptr) {
AMS_UNUSED(hint);
return static_cast<T *>(::ams::fssystem::Allocate(sizeof(T) * size));
}
static void Deallocate(void *ptr, size_t size);
static void DeallocateUnsafe(void *ptr, size_t size);
void Deallocate(T *ptr, size_t size) {
return ::ams::fssystem::Deallocate(ptr, sizeof(T) * size);
}
static void LockAllocatorMutex();
static void UnlockAllocatorMutex();
};
ALWAYS_INLINE T *allocate(size_t size, const T *hint = nullptr) { return this->Allocate(size, hint); }
ALWAYS_INLINE void deallocate(T *ptr, size_t size) { return this->Deallocate(ptr, size); }
};
using AllocatorFunctionSetForNormal = AllocatorFunctionSet<false>;
using AllocatorFunctionSetForSystem = AllocatorFunctionSet<true>;
template<typename T, typename Impl, bool RequireNonNull, bool AllocateWhileLocked>
class AllocatorTemplate : public std::allocator<T> {
public:
template<typename U>
struct rebind {
using other = AllocatorTemplate<U, Impl, RequireNonNull, AllocateWhileLocked>;
};
private:
static ALWAYS_INLINE T *AllocateImpl(::std::size_t n) {
if constexpr (AllocateWhileLocked) {
auto * const p = Impl::AllocateUnsafe(sizeof(T) * n);
Impl::UnlockAllocatorMutex();
return static_cast<T *>(p);
} else {
return static_cast<T *>(Impl::Allocate(sizeof(T) * n));
}
}
public:
AllocatorTemplate() { /* ... */ }
template<typename U>
AllocatorTemplate(const AllocatorTemplate<U, Impl, RequireNonNull, AllocateWhileLocked> &) { /* ... */ }
[[nodiscard]] T *allocate(::std::size_t n) {
auto * const p = AllocateImpl(n);
if constexpr (RequireNonNull) {
AMS_ABORT_UNLESS(p != nullptr);
}
return p;
}
void deallocate(T *p, ::std::size_t n) {
Impl::Deallocate(p, sizeof(T) * n);
}
};
template<typename T, typename Impl>
using AllocatorTemplateForAllocateShared = AllocatorTemplate<T, Impl, true, true>;
template<typename T>
std::shared_ptr<T> AllocateShared() {
return std::allocate_shared<T>(StdAllocator<T>{});
}
template<typename T, typename... Args>
std::shared_ptr<T> AllocateShared(Args &&... args) {
return std::allocate_shared<T>(StdAllocator<T>{}, std::forward<Args>(args)...);
return ::ams::fs::impl::AllocateSharedImpl<T, impl::AllocatorTemplateForAllocateShared, impl::AllocatorFunctionSetForNormal>(std::forward<Args>(args)...);
}
template<typename TImpl, typename ErrorResult, typename TIntf, typename... Args>
Result AllocateSharedForSystem(std::shared_ptr<TIntf> *out, Args &&... args) {
/* Allocate the object. */
auto p = ::ams::fs::impl::AllocateSharedImpl<TImpl, impl::AllocatorTemplateForAllocateShared, impl::AllocatorFunctionSetForSystem>(std::forward<Args>(args)...);
/* Check that allocation succeeded. */
R_UNLESS(p != nullptr, ErrorResult());
/* Return the allocated object. */
*out = std::move(p);
return ResultSuccess();
}
}

106
libraries/libstratosphere/source/fssystem/fssystem_allocator_utility.cpp
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@ -21,37 +21,110 @@ namespace ams::fssystem {
constexpr bool UseDefaultAllocators = false;
bool g_used_default_allocator;
constinit bool g_used_default_allocator = false;
void *DefaultAllocate(size_t size) {
g_used_default_allocator = true;
return std::malloc(size);
return ams::Malloc(size);
}
void DefaultDeallocate(void *ptr, size_t size) {
AMS_UNUSED(size);
std::free(ptr);
ams::Free(ptr);
}
AllocateFunction g_allocate_func = UseDefaultAllocators ? DefaultAllocate : nullptr;
DeallocateFunction g_deallocate_func = UseDefaultAllocators ? DefaultDeallocate : nullptr;
constinit os::SdkMutex g_allocate_mutex;
constinit os::SdkMutex g_allocate_mutex_for_system;
constinit AllocateFunction g_allocate_func = UseDefaultAllocators ? DefaultAllocate : nullptr;
constinit DeallocateFunction g_deallocate_func = UseDefaultAllocators ? DefaultDeallocate : nullptr;
constinit AllocateFunction g_allocate_func_for_system = nullptr;
constinit DeallocateFunction g_deallocate_func_for_system = nullptr;
void *AllocateUnsafe(size_t size) {
/* Check pre-conditions. */
AMS_ASSERT(g_allocate_mutex.IsLockedByCurrentThread());
AMS_ASSERT(g_allocate_func != nullptr);
/* Allocate memory. */
return g_allocate_func(size);
}
void DeallocateUnsafe(void *ptr, size_t size) {
/* Check pre-conditions. */
AMS_ASSERT(g_allocate_mutex.IsLockedByCurrentThread());
AMS_ASSERT(g_deallocate_func != nullptr);
/* Deallocate the pointer. */
g_deallocate_func(ptr, size);
}
}
namespace impl {
/* Normal allocator set. */
template<> void *AllocatorFunctionSet<false>::Allocate(size_t size) { return ::ams::fssystem::Allocate(size); }
template<> void *AllocatorFunctionSet<false>::AllocateUnsafe(size_t size) { return ::ams::fssystem::AllocateUnsafe(size); }
template<> void AllocatorFunctionSet<false>::Deallocate(void *ptr, size_t size) { return ::ams::fssystem::Deallocate(ptr, size); }
template<> void AllocatorFunctionSet<false>::DeallocateUnsafe(void *ptr, size_t size) { return ::ams::fssystem::DeallocateUnsafe(ptr, size); }
template<> void AllocatorFunctionSet<false>::LockAllocatorMutex() { ::ams::fssystem::g_allocate_mutex.Lock(); }
template<> void AllocatorFunctionSet<false>::UnlockAllocatorMutex() { ::ams::fssystem::g_allocate_mutex.Unlock(); }
/* System allocator set. */
template<> void *AllocatorFunctionSet<true>::AllocateUnsafe(size_t size) {
/* Check pre-conditions. */
AMS_ASSERT(::ams::fssystem::g_allocate_mutex_for_system.IsLockedByCurrentThread());
AMS_ASSERT(::ams::fssystem::g_allocate_func_for_system != nullptr);
/* Allocate memory. */
return g_allocate_func_for_system(size);
}
template<> void AllocatorFunctionSet<true>::DeallocateUnsafe(void *ptr, size_t size) {
/* Check pre-conditions. */
AMS_ASSERT(::ams::fssystem::g_allocate_mutex_for_system.IsLockedByCurrentThread());
AMS_ASSERT(::ams::fssystem::g_deallocate_func_for_system != nullptr);
/* Deallocate the pointer. */
::ams::fssystem::g_deallocate_func_for_system(ptr, size);
}
template<> void *AllocatorFunctionSet<true>::Allocate(size_t size) {
std::scoped_lock lk(::ams::fssystem::g_allocate_mutex_for_system);
return ::ams::fssystem::impl::AllocatorFunctionSet<true>::AllocateUnsafe(size);
}
template<> void AllocatorFunctionSet<true>::Deallocate(void *ptr, size_t size) {
std::scoped_lock lk(::ams::fssystem::g_allocate_mutex_for_system);
return ::ams::fssystem::impl::AllocatorFunctionSet<true>::DeallocateUnsafe(ptr, size);
}
template<> void AllocatorFunctionSet<true>::LockAllocatorMutex() { ::ams::fssystem::g_allocate_mutex_for_system.Lock(); }
template<> void AllocatorFunctionSet<true>::UnlockAllocatorMutex() { ::ams::fssystem::g_allocate_mutex_for_system.Unlock(); }
}
void *Allocate(size_t size) {
AMS_ASSERT(g_allocate_func != nullptr);
return g_allocate_func(size);
std::scoped_lock lk(g_allocate_mutex);
return AllocateUnsafe(size);
}
void Deallocate(void *ptr, size_t size) {
AMS_ASSERT(g_deallocate_func != nullptr);
return g_deallocate_func(ptr, size);
std::scoped_lock lk(g_allocate_mutex);
return DeallocateUnsafe(ptr, size);
}
void InitializeAllocator(AllocateFunction allocate_func, DeallocateFunction deallocate_func) {
/* Check pre-conditions. */
AMS_ASSERT(allocate_func != nullptr);
AMS_ASSERT(deallocate_func != nullptr);
/* Check that we can initialize. */
if constexpr (UseDefaultAllocators) {
AMS_ASSERT(g_used_default_allocator == false);
} else {
@ -59,8 +132,23 @@ namespace ams::fssystem {
AMS_ASSERT(g_deallocate_func == nullptr);
}
/* Set the allocator functions. */
g_allocate_func = allocate_func;
g_deallocate_func = deallocate_func;
}
void InitializeAllocatorForSystem(AllocateFunction allocate_func, DeallocateFunction deallocate_func) {
/* Check pre-conditions. */
AMS_ASSERT(allocate_func != nullptr);
AMS_ASSERT(deallocate_func != nullptr);
/* Check that we can initialize. */
AMS_ASSERT(g_allocate_func_for_system == nullptr);
AMS_ASSERT(g_deallocate_func_for_system == nullptr);
/* Set the system allocator functions. */
g_allocate_func_for_system = allocate_func;
g_deallocate_func_for_system = deallocate_func;
}
}

1
libraries/libstratosphere/source/fssystem/fssystem_file_system_proxy_api.cpp
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@ -124,6 +124,7 @@ namespace ams::fssystem {
/* TODO FS-REIMPL: sf::SetGlobalDefaultMemoryResource() */
fs::SetAllocator(AllocateForFileSystemProxy, DeallocateForFileSystemProxy);
fssystem::InitializeAllocator(AllocateForFileSystemProxy, DeallocateForFileSystemProxy);
fssystem::InitializeAllocatorForSystem(AllocateForFileSystemProxy, DeallocateForFileSystemProxy);
/* Initialize the buffer manager. */
/* TODO FS-REIMPL: os::AllocateMemoryBlock(...); */