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// Copyright 2014 Citra Emulator Project / PPSSPP Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <cstddef>
#include <string>
#include <utility>
#include <boost/smart_ptr/intrusive_ptr.hpp>
#include "common/assert.h"
#include "common/common_types.h"
namespace Kernel {
using Handle = u32;
enum class HandleType : u32 {
Unknown,
Event,
Mutex,
SharedMemory,
Thread,
Process,
AddressArbiter,
ConditionVariable,
Timer,
ResourceLimit,
CodeSet,
ClientPort,
ServerPort,
ClientSession,
ServerSession,
};
enum class ResetType {
OneShot,
Sticky,
Pulse,
};
class Object : NonCopyable {
public:
virtual ~Object() {}
/// Returns a unique identifier for the object. For debugging purposes only.
unsigned int GetObjectId() const {
return object_id;
}
virtual std::string GetTypeName() const {
return "[BAD KERNEL OBJECT TYPE]";
}
virtual std::string GetName() const {
return "[UNKNOWN KERNEL OBJECT]";
}
virtual Kernel::HandleType GetHandleType() const = 0;
/**
* Check if a thread can wait on the object
* @return True if a thread can wait on the object, otherwise false
*/
bool IsWaitable() const {
switch (GetHandleType()) {
case HandleType::Event:
case HandleType::Mutex:
case HandleType::Thread:
case HandleType::ConditionVariable:
case HandleType::Timer:
case HandleType::ServerPort:
case HandleType::ServerSession:
return true;
case HandleType::Unknown:
case HandleType::SharedMemory:
case HandleType::Process:
case HandleType::AddressArbiter:
case HandleType::ResourceLimit:
case HandleType::CodeSet:
case HandleType::ClientPort:
case HandleType::ClientSession:
return false;
}
UNREACHABLE();
}
public:
static unsigned int next_object_id;
private:
friend void intrusive_ptr_add_ref(Object*);
friend void intrusive_ptr_release(Object*);
unsigned int ref_count = 0;
unsigned int object_id = next_object_id++;
};
// Special functions used by boost::instrusive_ptr to do automatic ref-counting
inline void intrusive_ptr_add_ref(Object* object) {
++object->ref_count;
}
inline void intrusive_ptr_release(Object* object) {
if (--object->ref_count == 0) {
delete object;
}
}
template <typename T>
using SharedPtr = boost::intrusive_ptr<T>;
/**
* Attempts to downcast the given Object pointer to a pointer to T.
* @return Derived pointer to the object, or `nullptr` if `object` isn't of type T.
*/
template <typename T>
inline SharedPtr<T> DynamicObjectCast(SharedPtr<Object> object) {
if (object != nullptr && object->GetHandleType() == T::HANDLE_TYPE) {
return boost::static_pointer_cast<T>(std::move(object));
}
return nullptr;
}
/// Initialize the kernel with the specified system mode.
void Init(u32 system_mode);
/// Shutdown the kernel
void Shutdown();
} // namespace Kernel
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