diff options
Diffstat (limited to 'src/core/hle/kernel/kernel.h')
| -rw-r--r-- | src/core/hle/kernel/kernel.h | 108 |
1 files changed, 93 insertions, 15 deletions
diff --git a/src/core/hle/kernel/kernel.h b/src/core/hle/kernel/kernel.h index 5e5217b78..4d8e388b6 100644 --- a/src/core/hle/kernel/kernel.h +++ b/src/core/hle/kernel/kernel.h @@ -8,12 +8,19 @@ #include <array> #include <string> +#include <vector> + #include "common/common.h" #include "core/hle/result.h" typedef u32 Handle; typedef s32 Result; +// TODO: It would be nice to eventually replace these with strong types that prevent accidental +// conversion between each other. +typedef u32 VAddr; ///< Represents a pointer in the userspace virtual address space. +typedef u32 PAddr; ///< Represents a pointer in the ARM11 physical address space. + const Handle INVALID_HANDLE = 0; namespace Kernel { @@ -24,7 +31,8 @@ class Thread; const ResultCode ERR_OUT_OF_HANDLES(ErrorDescription::OutOfMemory, ErrorModule::Kernel, ErrorSummary::OutOfResource, ErrorLevel::Temporary); // TOOD: Verify code -const ResultCode ERR_INVALID_HANDLE = InvalidHandle(ErrorModule::Kernel); +const ResultCode ERR_INVALID_HANDLE(ErrorDescription::InvalidHandle, ErrorModule::Kernel, + ErrorSummary::InvalidArgument, ErrorLevel::Permanent); enum KernelHandle : Handle { CurrentThread = 0xFFFF8000, @@ -50,32 +58,51 @@ enum { DEFAULT_STACK_SIZE = 0x4000, }; -class HandleTable; - class Object : NonCopyable { - friend class HandleTable; - u32 handle = INVALID_HANDLE; public: virtual ~Object() {} - Handle GetHandle() const { return handle; } + + /// 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; /** - * Wait for kernel object to synchronize. - * @return True if the current thread should wait as a result of the wait + * Check if a thread can wait on the object + * @return True if a thread can wait on the object, otherwise false */ - virtual ResultVal<bool> WaitSynchronization() { - LOG_ERROR(Kernel, "(UNIMPLEMENTED)"); - return UnimplementedFunction(ErrorModule::Kernel); + bool IsWaitable() const { + switch (GetHandleType()) { + case HandleType::Session: + case HandleType::Event: + case HandleType::Mutex: + case HandleType::Thread: + case HandleType::Semaphore: + case HandleType::Timer: + return true; + + case HandleType::Unknown: + case HandleType::Port: + case HandleType::SharedMemory: + case HandleType::Redirection: + case HandleType::Process: + case HandleType::AddressArbiter: + return false; + } + + return false; } private: friend void intrusive_ptr_add_ref(Object*); friend void intrusive_ptr_release(Object*); + static unsigned int next_object_id; + unsigned int ref_count = 0; + unsigned int object_id = next_object_id++; }; // Special functions used by boost::instrusive_ptr to do automatic ref-counting @@ -92,6 +119,45 @@ inline void intrusive_ptr_release(Object* object) { template <typename T> using SharedPtr = boost::intrusive_ptr<T>; +/// Class that represents a Kernel object that a thread can be waiting on +class WaitObject : public Object { +public: + + /** + * Check if the current thread should wait until the object is available + * @return True if the current thread should wait due to this object being unavailable + */ + virtual bool ShouldWait() = 0; + + /// Acquire/lock the object if it is available + virtual void Acquire() = 0; + + /** + * Add a thread to wait on this object + * @param thread Pointer to thread to add + */ + void AddWaitingThread(SharedPtr<Thread> thread); + + /** + * Removes a thread from waiting on this object (e.g. if it was resumed already) + * @param thread Pointer to thread to remove + */ + void RemoveWaitingThread(Thread* thread); + + /** + * Wake up the next thread waiting on this object + * @return Pointer to the thread that was resumed, nullptr if no threads are waiting + */ + SharedPtr<Thread> WakeupNextThread(); + + /// Wake up all threads waiting on this object + void WakeupAllWaitingThreads(); + +private: + /// Threads waiting for this object to become available + std::vector<SharedPtr<Thread>> waiting_threads; +}; + /** * This class allows the creation of Handles, which are references to objects that can be tested * for validity and looked up. Here they are used to pass references to kernel objects to/from the @@ -146,14 +212,14 @@ public: /** * Looks up a handle. - * @returns Pointer to the looked-up object, or `nullptr` if the handle is not valid. + * @return Pointer to the looked-up object, or `nullptr` if the handle is not valid. */ SharedPtr<Object> GetGeneric(Handle handle) const; /** * Looks up a handle while verifying its type. - * @returns Pointer to the looked-up object, or `nullptr` if the handle is not valid or its - * type differs from the handle type `T::HANDLE_TYPE`. + * @return Pointer to the looked-up object, or `nullptr` if the handle is not valid or its + * type differs from the handle type `T::HANDLE_TYPE`. */ template <class T> SharedPtr<T> Get(Handle handle) const { @@ -164,6 +230,19 @@ public: return nullptr; } + /** + * Looks up a handle while verifying that it is an object that a thread can wait on + * @return Pointer to the looked-up object, or `nullptr` if the handle is not valid or it is + * not a waitable object. + */ + SharedPtr<WaitObject> GetWaitObject(Handle handle) const { + SharedPtr<Object> object = GetGeneric(handle); + if (object != nullptr && object->IsWaitable()) { + return boost::static_pointer_cast<WaitObject>(std::move(object)); + } + return nullptr; + } + /// Closes all handles held in this table. void Clear(); @@ -197,7 +276,6 @@ private: }; extern HandleTable g_handle_table; -extern SharedPtr<Thread> g_main_thread; /// The ID code of the currently running game /// TODO(Subv): This variable should not be here, |