ca3d9d659e
Previously, these were sitting outside of the Kernel namespace, which doesn't really make sense, given they're related to the Thread class which is within the Kernel namespace.
294 lines
9.4 KiB
C++
294 lines
9.4 KiB
C++
// Copyright 2014 Citra Emulator Project / PPSSPP Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <string>
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#include <unordered_map>
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#include <vector>
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#include <boost/container/flat_map.hpp>
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#include <boost/container/flat_set.hpp>
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#include "common/common_types.h"
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#include "core/arm/arm_interface.h"
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#include "core/hle/kernel/object.h"
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#include "core/hle/kernel/wait_object.h"
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#include "core/hle/result.h"
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namespace Kernel {
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class Mutex;
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class Process;
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enum ThreadPriority : u32 {
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THREADPRIO_HIGHEST = 0, ///< Highest thread priority
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THREADPRIO_USERLAND_MAX = 24, ///< Highest thread priority for userland apps
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THREADPRIO_DEFAULT = 48, ///< Default thread priority for userland apps
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THREADPRIO_LOWEST = 63, ///< Lowest thread priority
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};
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enum ThreadProcessorId : s32 {
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THREADPROCESSORID_DEFAULT = -2, ///< Run thread on default core specified by exheader
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THREADPROCESSORID_ALL = -1, ///< Run thread on either core
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THREADPROCESSORID_0 = 0, ///< Run thread on core 0 (AppCore)
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THREADPROCESSORID_1 = 1, ///< Run thread on core 1 (SysCore)
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THREADPROCESSORID_MAX = 2, ///< Processor ID must be less than this
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};
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enum ThreadStatus {
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Running, ///< Currently running
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Ready, ///< Ready to run
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WaitArb, ///< Waiting on an address arbiter
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WaitSleep, ///< Waiting due to a SleepThread SVC
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WaitIPC, ///< Waiting for the reply from an IPC request
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WaitSynchAny, ///< Waiting due to WaitSynch1 or WaitSynchN with wait_all = false
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WaitSynchAll, ///< Waiting due to WaitSynchronizationN with wait_all = true
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WaitHleEvent, ///< Waiting due to an HLE handler pausing the thread
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Dormant, ///< Created but not yet made ready
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Dead ///< Run to completion, or forcefully terminated
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};
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enum class ThreadWakeupReason {
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Signal, // The thread was woken up by WakeupAllWaitingThreads due to an object signal.
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Timeout // The thread was woken up due to a wait timeout.
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};
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class Thread final : public WaitObject {
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public:
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/**
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* Creates and returns a new thread. The new thread is immediately scheduled
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* @param name The friendly name desired for the thread
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* @param entry_point The address at which the thread should start execution
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* @param priority The thread's priority
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* @param arg User data to pass to the thread
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* @param processor_id The ID(s) of the processors on which the thread is desired to be run
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* @param stack_top The address of the thread's stack top
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* @param owner_process The parent process for the thread
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* @return A shared pointer to the newly created thread
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*/
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static ResultVal<SharedPtr<Thread>> Create(std::string name, VAddr entry_point, u32 priority,
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u32 arg, s32 processor_id, VAddr stack_top,
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SharedPtr<Process> owner_process);
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std::string GetName() const override {
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return name;
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}
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std::string GetTypeName() const override {
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return "Thread";
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}
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static const HandleType HANDLE_TYPE = HandleType::Thread;
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HandleType GetHandleType() const override {
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return HANDLE_TYPE;
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}
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bool ShouldWait(Thread* thread) const override;
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void Acquire(Thread* thread) override;
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/**
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* Gets the thread's current priority
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* @return The current thread's priority
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*/
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u32 GetPriority() const {
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return current_priority;
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}
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/**
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* Sets the thread's current priority
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* @param priority The new priority
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*/
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void SetPriority(u32 priority);
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/**
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* Boost's a thread's priority to the best priority among the thread's held mutexes.
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* This prevents priority inversion via priority inheritance.
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*/
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void UpdatePriority();
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/**
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* Temporarily boosts the thread's priority until the next time it is scheduled
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* @param priority The new priority
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*/
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void BoostPriority(u32 priority);
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/**
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* Gets the thread's thread ID
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* @return The thread's ID
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*/
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u32 GetThreadId() const {
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return thread_id;
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}
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/**
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* Resumes a thread from waiting
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*/
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void ResumeFromWait();
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/**
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* Schedules an event to wake up the specified thread after the specified delay
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* @param nanoseconds The time this thread will be allowed to sleep for
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*/
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void WakeAfterDelay(s64 nanoseconds);
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/**
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* Sets the result after the thread awakens (from either WaitSynchronization SVC)
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* @param result Value to set to the returned result
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*/
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void SetWaitSynchronizationResult(ResultCode result);
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/**
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* Sets the output parameter value after the thread awakens (from WaitSynchronizationN SVC only)
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* @param output Value to set to the output parameter
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*/
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void SetWaitSynchronizationOutput(s32 output);
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/**
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* Retrieves the index that this particular object occupies in the list of objects
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* that the thread passed to WaitSynchronizationN, starting the search from the last element.
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* It is used to set the output value of WaitSynchronizationN when the thread is awakened.
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* When a thread wakes up due to an object signal, the kernel will use the index of the last
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* matching object in the wait objects list in case of having multiple instances of the same
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* object in the list.
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* @param object Object to query the index of.
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*/
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s32 GetWaitObjectIndex(WaitObject* object) const;
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/**
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* Stops a thread, invalidating it from further use
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*/
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void Stop();
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/*
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* Returns the Thread Local Storage address of the current thread
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* @returns VAddr of the thread's TLS
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*/
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VAddr GetTLSAddress() const {
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return tls_address;
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}
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/*
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* Returns the address of the current thread's command buffer, located in the TLS.
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* @returns VAddr of the thread's command buffer.
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*/
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VAddr GetCommandBufferAddress() const;
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/**
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* Returns whether this thread is waiting for all the objects in
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* its wait list to become ready, as a result of a WaitSynchronizationN call
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* with wait_all = true.
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*/
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bool IsSleepingOnWaitAll() const {
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return status == ThreadStatus::WaitSynchAll;
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}
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std::unique_ptr<ARM_Interface::ThreadContext> context;
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u32 thread_id;
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ThreadStatus status;
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VAddr entry_point;
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VAddr stack_top;
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u32 nominal_priority; ///< Nominal thread priority, as set by the emulated application
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u32 current_priority; ///< Current thread priority, can be temporarily changed
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u64 last_running_ticks; ///< CPU tick when thread was last running
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s32 processor_id;
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VAddr tls_address; ///< Virtual address of the Thread Local Storage of the thread
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/// Mutexes currently held by this thread, which will be released when it exits.
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boost::container::flat_set<SharedPtr<Mutex>> held_mutexes;
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/// Mutexes that this thread is currently waiting for.
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boost::container::flat_set<SharedPtr<Mutex>> pending_mutexes;
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SharedPtr<Process> owner_process; ///< Process that owns this thread
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/// Objects that the thread is waiting on, in the same order as they were
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// passed to WaitSynchronization1/N.
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std::vector<SharedPtr<WaitObject>> wait_objects;
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VAddr wait_address; ///< If waiting on an AddressArbiter, this is the arbitration address
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std::string name;
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/// Handle used as userdata to reference this object when inserting into the CoreTiming queue.
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Handle callback_handle;
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using WakeupCallback = void(ThreadWakeupReason reason, SharedPtr<Thread> thread,
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SharedPtr<WaitObject> object);
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// Callback that will be invoked when the thread is resumed from a waiting state. If the thread
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// was waiting via WaitSynchronizationN then the object will be the last object that became
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// available. In case of a timeout, the object will be nullptr.
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std::function<WakeupCallback> wakeup_callback;
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private:
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Thread();
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~Thread() override;
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};
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/**
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* Sets up the primary application thread
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* @param entry_point The address at which the thread should start execution
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* @param priority The priority to give the main thread
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* @param owner_process The parent process for the main thread
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* @return A shared pointer to the main thread
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*/
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SharedPtr<Thread> SetupMainThread(u32 entry_point, u32 priority, SharedPtr<Process> owner_process);
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/**
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* Returns whether there are any threads that are ready to run.
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*/
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bool HaveReadyThreads();
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/**
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* Reschedules to the next available thread (call after current thread is suspended)
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*/
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void Reschedule();
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/**
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* Arbitrate the highest priority thread that is waiting
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* @param address The address for which waiting threads should be arbitrated
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*/
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Thread* ArbitrateHighestPriorityThread(u32 address);
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/**
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* Arbitrate all threads currently waiting.
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* @param address The address for which waiting threads should be arbitrated
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*/
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void ArbitrateAllThreads(u32 address);
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/**
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* Gets the current thread
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*/
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Thread* GetCurrentThread();
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/**
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* Waits the current thread on a sleep
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*/
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void WaitCurrentThread_Sleep();
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/**
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* Stops the current thread and removes it from the thread_list
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*/
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void ExitCurrentThread();
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/**
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* Initialize threading
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*/
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void ThreadingInit();
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/**
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* Shutdown threading
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*/
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void ThreadingShutdown();
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/**
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* Get a const reference to the thread list for debug use
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*/
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const std::vector<SharedPtr<Thread>>& GetThreadList();
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} // namespace Kernel
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