mirror of
https://github.com/PabloMK7/citra.git
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Scheduler refactor Pt. 1
* Simplifies scheduling logic, specifically regarding thread status. It should be much clearer which statuses are valid for a thread at any given point in the system. * Removes dead code from thread.cpp. * Moves the implementation of resetting a ThreadContext to the corresponding core's implementation. Other changes: * Fixed comments in arm interfaces. * Updated comments in thread.cpp * Removed confusing, useless, functions like MakeReady() and ChangeStatus() from thread.cpp. * Removed stack_size from Thread. In the CTR kernel, the thread's stack would be allocated before thread creation.
This commit is contained in:
Kevin Hartman
parent
848795f383
commit
5fcbfc06eb
7 changed files with 289 additions and 286 deletions
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@ -85,6 +85,15 @@ public:
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*/
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virtual void AddTicks(u64 ticks) = 0;
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/**
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* Initializes a CPU context for use on this CPU
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* @param context Thread context to reset
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* @param stack_top Pointer to the top of the stack
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* @param entry_point Entry point for execution
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* @param arg User argument for thread
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*/
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virtual void ResetContext(Core::ThreadContext& context, u32 stack_top, u32 entry_point, u32 arg) = 0;
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/**
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* Saves the current CPU context
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* @param ctx Thread context to save
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@ -93,6 +93,16 @@ void ARM_DynCom::ExecuteInstructions(int num_instructions) {
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AddTicks(ticks_executed);
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}
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void ARM_DynCom::ResetContext(Core::ThreadContext& context, u32 stack_top, u32 entry_point, u32 arg) {
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memset(&context, 0, sizeof(Core::ThreadContext));
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context.cpu_registers[0] = arg;
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context.pc = entry_point;
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context.sp = stack_top;
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context.cpsr = 0x1F; // Usermode
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context.mode = 8; // Instructs dyncom CPU core to start execution as if it's "resuming" a thread.
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}
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void ARM_DynCom::SaveContext(Core::ThreadContext& ctx) {
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memcpy(ctx.cpu_registers, state->Reg, sizeof(ctx.cpu_registers));
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memcpy(ctx.fpu_registers, state->ExtReg, sizeof(ctx.fpu_registers));
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@ -13,79 +13,24 @@
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class ARM_DynCom final : virtual public ARM_Interface {
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public:
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ARM_DynCom();
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~ARM_DynCom();
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/**
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* Set the Program Counter to an address
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* @param pc Address to set PC to
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*/
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void SetPC(u32 pc) override;
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/*
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* Get the current Program Counter
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* @return Returns current PC
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*/
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u32 GetPC() const override;
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/**
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* Get an ARM register
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* @param index Register index (0-15)
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* @return Returns the value in the register
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*/
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u32 GetReg(int index) const override;
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/**
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* Set an ARM register
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* @param index Register index (0-15)
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* @param value Value to set register to
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*/
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void SetReg(int index, u32 value) override;
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/**
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* Get the current CPSR register
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* @return Returns the value of the CPSR register
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*/
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u32 GetCPSR() const override;
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/**
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* Set the current CPSR register
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* @param cpsr Value to set CPSR to
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*/
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void SetCPSR(u32 cpsr) override;
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/**
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* Returns the number of clock ticks since the last reset
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* @return Returns number of clock ticks
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*/
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u64 GetTicks() const override;
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/**
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* Advance the CPU core by the specified number of ticks (e.g. to simulate CPU execution time)
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* @param ticks Number of ticks to advance the CPU core
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*/
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void AddTicks(u64 ticks) override;
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/**
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* Saves the current CPU context
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* @param ctx Thread context to save
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*/
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void ResetContext(Core::ThreadContext& context, u32 stack_top, u32 entry_point, u32 arg);
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void SaveContext(Core::ThreadContext& ctx) override;
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/**
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* Loads a CPU context
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* @param ctx Thread context to load
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*/
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void LoadContext(const Core::ThreadContext& ctx) override;
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/// Prepare core for thread reschedule (if needed to correctly handle state)
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void PrepareReschedule() override;
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/**
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* Executes the given number of instructions
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* @param num_instructions Number of instructions to executes
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*/
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void ExecuteInstructions(int num_instructions) override;
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private:
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@ -153,12 +153,8 @@ void Shutdown() {
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* @return True on success, otherwise false
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*/
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bool LoadExec(u32 entry_point) {
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Core::g_app_core->SetPC(entry_point);
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// 0x30 is the typical main thread priority I've seen used so far
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g_main_thread = Kernel::SetupMainThread(0x30, Kernel::DEFAULT_STACK_SIZE);
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// Setup the idle thread
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Kernel::SetupIdleThread();
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g_main_thread = Kernel::SetupMainThread(Kernel::DEFAULT_STACK_SIZE, entry_point, 0x30);
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return true;
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}
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@ -21,8 +21,11 @@
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namespace Kernel {
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/// Event type for the thread wake up event
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static int ThreadWakeupEventType = -1;
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bool Thread::ShouldWait() {
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return status != THREADSTATUS_DORMANT;
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return status != THREADSTATUS_DEAD;
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}
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void Thread::Acquire() {
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@ -33,12 +36,20 @@ void Thread::Acquire() {
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static std::vector<SharedPtr<Thread>> thread_list;
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// Lists only ready thread ids.
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static Common::ThreadQueueList<Thread*, THREADPRIO_LOWEST+1> thread_ready_queue;
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static Common::ThreadQueueList<Thread*, THREADPRIO_LOWEST+1> ready_queue;
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static Thread* current_thread;
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static const u32 INITIAL_THREAD_ID = 1; ///< The first available thread id at startup
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static u32 next_thread_id; ///< The next available thread id
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// The first available thread id at startup
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static u32 next_thread_id = 1;
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/**
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* Creates a new thread ID
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* @return The new thread ID
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*/
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inline static u32 const NewThreadId() {
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return next_thread_id++;
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}
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Thread::Thread() {}
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Thread::~Thread() {}
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@ -47,86 +58,53 @@ Thread* GetCurrentThread() {
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return current_thread;
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}
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/// Resets a thread
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static void ResetThread(Thread* t, u32 arg, s32 lowest_priority) {
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memset(&t->context, 0, sizeof(Core::ThreadContext));
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t->context.cpu_registers[0] = arg;
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t->context.pc = t->entry_point;
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t->context.sp = t->stack_top;
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t->context.cpsr = 0x1F; // Usermode
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// TODO(bunnei): This instructs the CPU core to start the execution as if it is "resuming" a
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// thread. This is somewhat Sky-Eye specific, and should be re-architected in the future to be
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// agnostic of the CPU core.
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t->context.mode = 8;
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if (t->current_priority < lowest_priority) {
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t->current_priority = t->initial_priority;
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}
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t->wait_objects.clear();
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t->wait_address = 0;
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}
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/// Change a thread to "ready" state
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static void ChangeReadyState(Thread* t, bool ready) {
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if (t->IsReady()) {
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if (!ready) {
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thread_ready_queue.remove(t->current_priority, t);
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}
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} else if (ready) {
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if (t->IsRunning()) {
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thread_ready_queue.push_front(t->current_priority, t);
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} else {
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thread_ready_queue.push_back(t->current_priority, t);
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}
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t->status = THREADSTATUS_READY;
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}
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}
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/// Check if a thread is waiting on a the specified wait object
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/**
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* Check if a thread is waiting on the specified wait object
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* @param thread The thread to test
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* @param wait_object The object to test against
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* @return True if the thread is waiting, false otherwise
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*/
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static bool CheckWait_WaitObject(const Thread* thread, WaitObject* wait_object) {
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if (thread->status != THREADSTATUS_WAIT_SYNCH)
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return false;
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auto itr = std::find(thread->wait_objects.begin(), thread->wait_objects.end(), wait_object);
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if (itr != thread->wait_objects.end())
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return thread->IsWaiting();
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return false;
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return itr != thread->wait_objects.end();
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}
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/// Check if the specified thread is waiting on the specified address to be arbitrated
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/**
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* Check if the specified thread is waiting on the specified address to be arbitrated
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* @param thread The thread to test
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* @param wait_address The address to test against
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* @return True if the thread is waiting, false otherwise
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*/
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static bool CheckWait_AddressArbiter(const Thread* thread, VAddr wait_address) {
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return thread->IsWaiting() && thread->wait_objects.empty() && wait_address == thread->wait_address;
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return thread->status == THREADSTATUS_WAIT_ARB && wait_address == thread->wait_address;
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}
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/// Stops the current thread
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void Thread::Stop(const char* reason) {
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void Thread::Stop() {
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// Release all the mutexes that this thread holds
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ReleaseThreadMutexes(this);
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ChangeReadyState(this, false);
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status = THREADSTATUS_DORMANT;
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// Cancel any outstanding wakeup events for this thread
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CoreTiming::UnscheduleEvent(ThreadWakeupEventType, callback_handle);
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// Clean up thread from ready queue
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// This is only needed when the thread is termintated forcefully (SVC TerminateProcess)
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if (status == THREADSTATUS_READY){
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ready_queue.remove(current_priority, this);
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}
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status = THREADSTATUS_DEAD;
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WakeupAllWaitingThreads();
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// Stopped threads are never waiting.
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// Clean up any dangling references in objects that this thread was waiting for
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for (auto& wait_object : wait_objects) {
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wait_object->RemoveWaitingThread(this);
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}
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wait_objects.clear();
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wait_address = 0;
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}
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/// Changes a threads state
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static void ChangeThreadState(Thread* t, ThreadStatus new_status) {
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if (!t || t->status == new_status) {
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return;
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}
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ChangeReadyState(t, (new_status & THREADSTATUS_READY) != 0);
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t->status = new_status;
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}
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/// Arbitrate the highest priority thread that is waiting
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Thread* ArbitrateHighestPriorityThread(u32 address) {
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Thread* highest_priority_thread = nullptr;
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s32 priority = THREADPRIO_LOWEST;
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@ -153,108 +131,113 @@ Thread* ArbitrateHighestPriorityThread(u32 address) {
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return highest_priority_thread;
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}
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/// Arbitrate all threads currently waiting
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void ArbitrateAllThreads(u32 address) {
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// Iterate through threads, find highest priority thread that is waiting to be arbitrated...
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// Resume all threads found to be waiting on the address
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for (auto& thread : thread_list) {
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if (CheckWait_AddressArbiter(thread.get(), address))
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thread->ResumeFromWait();
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}
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}
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/// Calls a thread by marking it as "ready" (note: will not actually execute until current thread yields)
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static void CallThread(Thread* t) {
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// Stop waiting
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ChangeThreadState(t, THREADSTATUS_READY);
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}
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/**
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* Switches the CPU's active thread context to that of the specified thread
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* @param new_thread The thread to switch to
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*/
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static void SwitchContext(Thread* new_thread) {
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_dbg_assert_msg_(Kernel, new_thread->status == THREADSTATUS_READY, "Thread must be ready to become running.");
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/// Switches CPU context to that of the specified thread
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static void SwitchContext(Thread* t) {
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Thread* cur = GetCurrentThread();
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Thread* previous_thread = GetCurrentThread();
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// Save context for current thread
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if (cur) {
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Core::g_app_core->SaveContext(cur->context);
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// Save context for previous thread
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if (previous_thread) {
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Core::g_app_core->SaveContext(previous_thread->context);
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if (cur->IsRunning()) {
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ChangeReadyState(cur, true);
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if (previous_thread->status == THREADSTATUS_RUNNING) {
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// This is only the case when a reschedule is triggered without the current thread
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// yielding execution (i.e. an event triggered, system core time-sliced, etc)
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ready_queue.push_front(previous_thread->current_priority, previous_thread);
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previous_thread->status = THREADSTATUS_READY;
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}
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}
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// Load context of new thread
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if (t) {
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current_thread = t;
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ChangeReadyState(t, false);
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t->status = (t->status | THREADSTATUS_RUNNING) & ~THREADSTATUS_READY;
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Core::g_app_core->LoadContext(t->context);
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if (new_thread) {
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current_thread = new_thread;
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ready_queue.remove(new_thread->current_priority, new_thread);
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new_thread->status = THREADSTATUS_RUNNING;
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Core::g_app_core->LoadContext(new_thread->context);
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} else {
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current_thread = nullptr;
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}
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}
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/// Gets the next thread that is ready to be run by priority
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static Thread* NextThread() {
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/**
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* Pops and returns the next thread from the thread queue
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* @return A pointer to the next ready thread
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*/
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static Thread* PopNextReadyThread() {
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Thread* next;
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Thread* cur = GetCurrentThread();
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Thread* thread = GetCurrentThread();
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if (cur && cur->IsRunning()) {
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next = thread_ready_queue.pop_first_better(cur->current_priority);
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if (thread && thread->status == THREADSTATUS_RUNNING) {
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// We have to do better than the current thread.
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// This call returns null when that's not possible.
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next = ready_queue.pop_first_better(thread->current_priority);
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} else {
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next = thread_ready_queue.pop_first();
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}
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if (next == 0) {
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return nullptr;
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next = ready_queue.pop_first();
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}
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return next;
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}
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void WaitCurrentThread_Sleep() {
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Thread* thread = GetCurrentThread();
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ChangeThreadState(thread, ThreadStatus(THREADSTATUS_WAIT | (thread->status & THREADSTATUS_SUSPEND)));
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thread->status = THREADSTATUS_WAIT_SLEEP;
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}
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void WaitCurrentThread_WaitSynchronization(SharedPtr<WaitObject> wait_object, bool wait_set_output, bool wait_all) {
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void WaitCurrentThread_WaitSynchronization(std::vector<SharedPtr<WaitObject>> wait_objects, bool wait_set_output, bool wait_all) {
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Thread* thread = GetCurrentThread();
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thread->wait_set_output = wait_set_output;
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thread->wait_all = wait_all;
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// It's possible to call WaitSynchronizationN without any objects passed in...
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if (wait_object != nullptr)
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thread->wait_objects.push_back(wait_object);
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ChangeThreadState(thread, ThreadStatus(THREADSTATUS_WAIT | (thread->status & THREADSTATUS_SUSPEND)));
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thread->wait_objects = std::move(wait_objects);
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thread->status = THREADSTATUS_WAIT_SYNCH;
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}
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void WaitCurrentThread_ArbitrateAddress(VAddr wait_address) {
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Thread* thread = GetCurrentThread();
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thread->wait_address = wait_address;
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ChangeThreadState(thread, ThreadStatus(THREADSTATUS_WAIT | (thread->status & THREADSTATUS_SUSPEND)));
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thread->status = THREADSTATUS_WAIT_ARB;
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}
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/// Event type for the thread wake up event
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static int ThreadWakeupEventType = -1;
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// TODO(yuriks): This can be removed if Thread objects are explicitly pooled in the future, allowing
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// us to simply use a pool index or similar.
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static Kernel::HandleTable wakeup_callback_handle_table;
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/// Callback that will wake up the thread it was scheduled for
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/**
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* Callback that will wake up the thread it was scheduled for
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* @param thread_handle The handle of the thread that's been awoken
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* @param cycles_late The number of CPU cycles that have passed since the desired wakeup time
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*/
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static void ThreadWakeupCallback(u64 thread_handle, int cycles_late) {
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SharedPtr<Thread> thread = wakeup_callback_handle_table.Get<Thread>((Handle)thread_handle);
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if (thread == nullptr) {
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LOG_CRITICAL(Kernel, "Callback fired for invalid thread %08X", thread_handle);
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LOG_CRITICAL(Kernel, "Callback fired for invalid thread %08X", (Handle)thread_handle);
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return;
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}
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thread->SetWaitSynchronizationResult(ResultCode(ErrorDescription::Timeout, ErrorModule::OS,
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ErrorSummary::StatusChanged, ErrorLevel::Info));
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if (thread->status == THREADSTATUS_WAIT_SYNCH) {
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thread->SetWaitSynchronizationResult(ResultCode(ErrorDescription::Timeout, ErrorModule::OS,
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ErrorSummary::StatusChanged, ErrorLevel::Info));
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if (thread->wait_set_output)
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thread->SetWaitSynchronizationOutput(-1);
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if (thread->wait_set_output)
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thread->SetWaitSynchronizationOutput(-1);
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}
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thread->ResumeFromWait();
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}
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void Thread::WakeAfterDelay(s64 nanoseconds) {
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// Don't schedule a wakeup if the thread wants to wait forever
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if (nanoseconds == -1)
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@ -265,7 +248,7 @@ void Thread::WakeAfterDelay(s64 nanoseconds) {
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}
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void Thread::ReleaseWaitObject(WaitObject* wait_object) {
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if (wait_objects.empty()) {
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if (status != THREADSTATUS_WAIT_SYNCH || wait_objects.empty()) {
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LOG_CRITICAL(Kernel, "thread is not waiting on any objects!");
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return;
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}
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@ -307,34 +290,48 @@ void Thread::ReleaseWaitObject(WaitObject* wait_object) {
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}
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void Thread::ResumeFromWait() {
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// Cancel any outstanding wakeup events
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// Cancel any outstanding wakeup events for this thread
|
||||
CoreTiming::UnscheduleEvent(ThreadWakeupEventType, callback_handle);
|
||||
|
||||
status &= ~THREADSTATUS_WAIT;
|
||||
|
||||
// Remove this thread from all other WaitObjects
|
||||
for (auto wait_object : wait_objects)
|
||||
wait_object->RemoveWaitingThread(this);
|
||||
|
||||
wait_objects.clear();
|
||||
wait_set_output = false;
|
||||
wait_all = false;
|
||||
wait_address = 0;
|
||||
|
||||
if (!(status & (THREADSTATUS_WAITSUSPEND | THREADSTATUS_DORMANT | THREADSTATUS_DEAD))) {
|
||||
ChangeReadyState(this, true);
|
||||
switch (status) {
|
||||
case THREADSTATUS_WAIT_SYNCH:
|
||||
// Remove this thread from all other WaitObjects
|
||||
for (auto wait_object : wait_objects)
|
||||
wait_object->RemoveWaitingThread(this);
|
||||
break;
|
||||
case THREADSTATUS_WAIT_ARB:
|
||||
case THREADSTATUS_WAIT_SLEEP:
|
||||
break;
|
||||
case THREADSTATUS_RUNNING:
|
||||
case THREADSTATUS_READY:
|
||||
LOG_ERROR(Kernel, "Thread with object id %u has already resumed.", GetObjectId());
|
||||
_dbg_assert_(Kernel, false);
|
||||
return;
|
||||
case THREADSTATUS_DEAD:
|
||||
// This should never happen, as threads must complete before being stopped.
|
||||
LOG_CRITICAL(Kernel, "Thread with object id %u cannot be resumed because it's DEAD.",
|
||||
GetObjectId());
|
||||
_dbg_assert_(Kernel, false);
|
||||
return;
|
||||
}
|
||||
|
||||
ready_queue.push_back(current_priority, this);
|
||||
status = THREADSTATUS_READY;
|
||||
}
|
||||
|
||||
/// Prints the thread queue for debugging purposes
|
||||
/**
|
||||
* Prints the thread queue for debugging purposes
|
||||
*/
|
||||
static void DebugThreadQueue() {
|
||||
Thread* thread = GetCurrentThread();
|
||||
if (!thread) {
|
||||
return;
|
||||
LOG_DEBUG(Kernel, "Current: NO CURRENT THREAD");
|
||||
} else {
|
||||
LOG_DEBUG(Kernel, "0x%02X %u (current)", thread->current_priority, GetCurrentThread()->GetObjectId());
|
||||
}
|
||||
LOG_DEBUG(Kernel, "0x%02X %u (current)", thread->current_priority, GetCurrentThread()->GetObjectId());
|
||||
|
||||
for (auto& t : thread_list) {
|
||||
s32 priority = thread_ready_queue.contains(t.get());
|
||||
s32 priority = ready_queue.contains(t.get());
|
||||
if (priority != -1) {
|
||||
LOG_DEBUG(Kernel, "0x%02X %u", priority, t->GetObjectId());
|
||||
}
|
||||
|
|
@ -342,14 +339,7 @@ static void DebugThreadQueue() {
|
|||
}
|
||||
|
||||
ResultVal<SharedPtr<Thread>> Thread::Create(std::string name, VAddr entry_point, s32 priority,
|
||||
u32 arg, s32 processor_id, VAddr stack_top, u32 stack_size) {
|
||||
if (stack_size < 0x200) {
|
||||
LOG_ERROR(Kernel, "(name=%s): invalid stack_size=0x%08X", name.c_str(), stack_size);
|
||||
// TODO: Verify error
|
||||
return ResultCode(ErrorDescription::InvalidSize, ErrorModule::Kernel,
|
||||
ErrorSummary::InvalidArgument, ErrorLevel::Permanent);
|
||||
}
|
||||
|
||||
u32 arg, s32 processor_id, VAddr stack_top) {
|
||||
if (priority < THREADPRIO_HIGHEST || priority > THREADPRIO_LOWEST) {
|
||||
s32 new_priority = CLAMP(priority, THREADPRIO_HIGHEST, THREADPRIO_LOWEST);
|
||||
LOG_WARNING(Kernel_SVC, "(name=%s): invalid priority=%d, clamping to %d",
|
||||
|
|
@ -369,13 +359,12 @@ ResultVal<SharedPtr<Thread>> Thread::Create(std::string name, VAddr entry_point,
|
|||
SharedPtr<Thread> thread(new Thread);
|
||||
|
||||
thread_list.push_back(thread);
|
||||
thread_ready_queue.prepare(priority);
|
||||
ready_queue.prepare(priority);
|
||||
|
||||
thread->thread_id = next_thread_id++;
|
||||
thread->thread_id = NewThreadId();
|
||||
thread->status = THREADSTATUS_DORMANT;
|
||||
thread->entry_point = entry_point;
|
||||
thread->stack_top = stack_top;
|
||||
thread->stack_size = stack_size;
|
||||
thread->initial_priority = thread->current_priority = priority;
|
||||
thread->processor_id = processor_id;
|
||||
thread->wait_set_output = false;
|
||||
|
|
@ -385,75 +374,74 @@ ResultVal<SharedPtr<Thread>> Thread::Create(std::string name, VAddr entry_point,
|
|||
thread->name = std::move(name);
|
||||
thread->callback_handle = wakeup_callback_handle_table.Create(thread).MoveFrom();
|
||||
|
||||
ResetThread(thread.get(), arg, 0);
|
||||
CallThread(thread.get());
|
||||
// TODO(peachum): move to ScheduleThread() when scheduler is added so selected core is used
|
||||
// to initialize the context
|
||||
Core::g_app_core->ResetContext(thread->context, stack_top, entry_point, arg);
|
||||
|
||||
ready_queue.push_back(thread->current_priority, thread.get());
|
||||
thread->status = THREADSTATUS_READY;
|
||||
|
||||
return MakeResult<SharedPtr<Thread>>(std::move(thread));
|
||||
}
|
||||
|
||||
/// Set the priority of the thread specified by handle
|
||||
void Thread::SetPriority(s32 priority) {
|
||||
// If priority is invalid, clamp to valid range
|
||||
if (priority < THREADPRIO_HIGHEST || priority > THREADPRIO_LOWEST) {
|
||||
s32 new_priority = CLAMP(priority, THREADPRIO_HIGHEST, THREADPRIO_LOWEST);
|
||||
LOG_WARNING(Kernel_SVC, "invalid priority=%d, clamping to %d", priority, new_priority);
|
||||
// TODO(peachum): Remove this. Range checking should be done, and an appropriate error should be returned.
|
||||
static void ClampPriority(const Thread* thread, s32* priority) {
|
||||
if (*priority < THREADPRIO_HIGHEST || *priority > THREADPRIO_LOWEST) {
|
||||
_dbg_assert_msg_(Kernel, false, "Application passed an out of range priority. An error should be returned.");
|
||||
|
||||
s32 new_priority = CLAMP(*priority, THREADPRIO_HIGHEST, THREADPRIO_LOWEST);
|
||||
LOG_WARNING(Kernel_SVC, "(name=%s): invalid priority=%d, clamping to %d",
|
||||
thread->name.c_str(), *priority, new_priority);
|
||||
// TODO(bunnei): Clamping to a valid priority is not necessarily correct behavior... Confirm
|
||||
// validity of this
|
||||
priority = new_priority;
|
||||
*priority = new_priority;
|
||||
}
|
||||
}
|
||||
|
||||
void Thread::SetPriority(s32 priority) {
|
||||
ClampPriority(this, &priority);
|
||||
|
||||
if (current_priority == priority) {
|
||||
return;
|
||||
}
|
||||
|
||||
if (status == THREADSTATUS_READY) {
|
||||
// If thread was ready, adjust queues
|
||||
ready_queue.remove(current_priority, this);
|
||||
ready_queue.prepare(priority);
|
||||
ready_queue.push_back(priority, this);
|
||||
}
|
||||
|
||||
// Change thread priority
|
||||
s32 old = current_priority;
|
||||
thread_ready_queue.remove(old, this);
|
||||
current_priority = priority;
|
||||
thread_ready_queue.prepare(current_priority);
|
||||
|
||||
// Change thread status to "ready" and push to ready queue
|
||||
if (IsRunning()) {
|
||||
status = (status & ~THREADSTATUS_RUNNING) | THREADSTATUS_READY;
|
||||
}
|
||||
if (IsReady()) {
|
||||
thread_ready_queue.push_back(current_priority, this);
|
||||
}
|
||||
}
|
||||
|
||||
SharedPtr<Thread> SetupIdleThread() {
|
||||
// We need to pass a few valid values to get around parameter checking in Thread::Create.
|
||||
auto thread = Thread::Create("idle", Memory::KERNEL_MEMORY_VADDR, THREADPRIO_LOWEST, 0,
|
||||
THREADPROCESSORID_0, 0, Kernel::DEFAULT_STACK_SIZE).MoveFrom();
|
||||
THREADPROCESSORID_0, 0).MoveFrom();
|
||||
|
||||
thread->idle = true;
|
||||
CallThread(thread.get());
|
||||
return thread;
|
||||
}
|
||||
|
||||
SharedPtr<Thread> SetupMainThread(s32 priority, u32 stack_size) {
|
||||
// Initialize new "main" thread
|
||||
auto thread_res = Thread::Create("main", Core::g_app_core->GetPC(), priority, 0,
|
||||
THREADPROCESSORID_0, Memory::SCRATCHPAD_VADDR_END, stack_size);
|
||||
// TODO(yuriks): Propagate error
|
||||
_dbg_assert_(Kernel, thread_res.Succeeded());
|
||||
SharedPtr<Thread> thread = std::move(*thread_res);
|
||||
SharedPtr<Thread> SetupMainThread(u32 stack_size, u32 entry_point, s32 priority) {
|
||||
_dbg_assert_(Kernel, !GetCurrentThread());
|
||||
|
||||
// If running another thread already, set it to "ready" state
|
||||
Thread* cur = GetCurrentThread();
|
||||
if (cur && cur->IsRunning()) {
|
||||
ChangeReadyState(cur, true);
|
||||
}
|
||||
// Initialize new "main" thread
|
||||
auto thread_res = Thread::Create("main", entry_point, priority, 0,
|
||||
THREADPROCESSORID_0, Memory::SCRATCHPAD_VADDR_END);
|
||||
|
||||
SharedPtr<Thread> thread = thread_res.MoveFrom();
|
||||
|
||||
// Run new "main" thread
|
||||
current_thread = thread.get();
|
||||
thread->status = THREADSTATUS_RUNNING;
|
||||
Core::g_app_core->LoadContext(thread->context);
|
||||
SwitchContext(thread.get());
|
||||
|
||||
return thread;
|
||||
}
|
||||
|
||||
|
||||
/// Reschedules to the next available thread (call after current thread is suspended)
|
||||
void Reschedule() {
|
||||
Thread* prev = GetCurrentThread();
|
||||
Thread* next = NextThread();
|
||||
Thread* next = PopNextReadyThread();
|
||||
HLE::g_reschedule = false;
|
||||
|
||||
if (next != nullptr) {
|
||||
|
|
@ -480,8 +468,10 @@ void Thread::SetWaitSynchronizationOutput(s32 output) {
|
|||
////////////////////////////////////////////////////////////////////////////////////////////////////
|
||||
|
||||
void ThreadingInit() {
|
||||
next_thread_id = INITIAL_THREAD_ID;
|
||||
ThreadWakeupEventType = CoreTiming::RegisterEvent("ThreadWakeupCallback", ThreadWakeupCallback);
|
||||
|
||||
// Setup the idle thread
|
||||
SetupIdleThread();
|
||||
}
|
||||
|
||||
void ThreadingShutdown() {
|
||||
|
|
|
|||
|
|
@ -31,13 +31,13 @@ enum ThreadProcessorId {
|
|||
};
|
||||
|
||||
enum ThreadStatus {
|
||||
THREADSTATUS_RUNNING = 1,
|
||||
THREADSTATUS_READY = 2,
|
||||
THREADSTATUS_WAIT = 4,
|
||||
THREADSTATUS_SUSPEND = 8,
|
||||
THREADSTATUS_DORMANT = 16,
|
||||
THREADSTATUS_DEAD = 32,
|
||||
THREADSTATUS_WAITSUSPEND = THREADSTATUS_WAIT | THREADSTATUS_SUSPEND
|
||||
THREADSTATUS_RUNNING, ///< Currently running
|
||||
THREADSTATUS_READY, ///< Ready to run
|
||||
THREADSTATUS_WAIT_ARB, ///< Waiting on an address arbiter
|
||||
THREADSTATUS_WAIT_SLEEP, ///< Waiting due to a SleepThread SVC
|
||||
THREADSTATUS_WAIT_SYNCH, ///< Waiting due to a WaitSynchronization SVC
|
||||
THREADSTATUS_DORMANT, ///< Created but not yet made ready
|
||||
THREADSTATUS_DEAD ///< Run to completion, or forcefully terminated
|
||||
};
|
||||
|
||||
namespace Kernel {
|
||||
|
|
@ -46,8 +46,19 @@ class Mutex;
|
|||
|
||||
class Thread final : public WaitObject {
|
||||
public:
|
||||
/**
|
||||
* Creates and returns a new thread. The new thread is immediately scheduled
|
||||
* @param name The friendly name desired for the thread
|
||||
* @param entry_point The address at which the thread should start execution
|
||||
* @param priority The thread's priority
|
||||
* @param arg User data to pass to the thread
|
||||
* @param processor_id The ID(s) of the processors on which the thread is desired to be run
|
||||
* @param stack_top The address of the thread's stack top
|
||||
* @param stack_size The size of the thread's stack
|
||||
* @return A shared pointer to the newly created thread
|
||||
*/
|
||||
static ResultVal<SharedPtr<Thread>> Create(std::string name, VAddr entry_point, s32 priority,
|
||||
u32 arg, s32 processor_id, VAddr stack_top, u32 stack_size);
|
||||
u32 arg, s32 processor_id, VAddr stack_top);
|
||||
|
||||
std::string GetName() const override { return name; }
|
||||
std::string GetTypeName() const override { return "Thread"; }
|
||||
|
|
@ -55,35 +66,47 @@ public:
|
|||
static const HandleType HANDLE_TYPE = HandleType::Thread;
|
||||
HandleType GetHandleType() const override { return HANDLE_TYPE; }
|
||||
|
||||
inline bool IsRunning() const { return (status & THREADSTATUS_RUNNING) != 0; }
|
||||
inline bool IsStopped() const { return (status & THREADSTATUS_DORMANT) != 0; }
|
||||
inline bool IsReady() const { return (status & THREADSTATUS_READY) != 0; }
|
||||
inline bool IsWaiting() const { return (status & THREADSTATUS_WAIT) != 0; }
|
||||
inline bool IsSuspended() const { return (status & THREADSTATUS_SUSPEND) != 0; }
|
||||
inline bool IsIdle() const { return idle; }
|
||||
|
||||
bool ShouldWait() override;
|
||||
void Acquire() override;
|
||||
|
||||
/**
|
||||
* Checks if the thread is an idle (stub) thread
|
||||
* @return True if the thread is an idle (stub) thread, false otherwise
|
||||
*/
|
||||
inline bool IsIdle() const { return idle; }
|
||||
|
||||
/**
|
||||
* Gets the thread's current priority
|
||||
* @return The current thread's priority
|
||||
*/
|
||||
s32 GetPriority() const { return current_priority; }
|
||||
|
||||
/**
|
||||
* Sets the thread's current priority
|
||||
* @param priority The new priority
|
||||
*/
|
||||
void SetPriority(s32 priority);
|
||||
|
||||
/**
|
||||
* Gets the thread's thread ID
|
||||
* @return The thread's ID
|
||||
*/
|
||||
u32 GetThreadId() const { return thread_id; }
|
||||
|
||||
void Stop(const char* reason);
|
||||
|
||||
/**
|
||||
* Release an acquired wait object
|
||||
* @param wait_object WaitObject to release
|
||||
*/
|
||||
void ReleaseWaitObject(WaitObject* wait_object);
|
||||
|
||||
/// Resumes a thread from waiting by marking it as "ready"
|
||||
/**
|
||||
* Resumes a thread from waiting
|
||||
*/
|
||||
void ResumeFromWait();
|
||||
|
||||
/**
|
||||
* Schedules an event to wake up the specified thread after the specified delay.
|
||||
* @param nanoseconds The time this thread will be allowed to sleep for.
|
||||
* Schedules an event to wake up the specified thread after the specified delay
|
||||
* @param nanoseconds The time this thread will be allowed to sleep for
|
||||
*/
|
||||
void WakeAfterDelay(s64 nanoseconds);
|
||||
|
||||
|
|
@ -99,6 +122,11 @@ public:
|
|||
*/
|
||||
void SetWaitSynchronizationOutput(s32 output);
|
||||
|
||||
/**
|
||||
* Stops a thread, invalidating it from further use
|
||||
*/
|
||||
void Stop();
|
||||
|
||||
Core::ThreadContext context;
|
||||
|
||||
u32 thread_id;
|
||||
|
|
@ -106,7 +134,6 @@ public:
|
|||
u32 status;
|
||||
u32 entry_point;
|
||||
u32 stack_top;
|
||||
u32 stack_size;
|
||||
|
||||
s32 initial_priority;
|
||||
s32 current_priority;
|
||||
|
|
@ -136,31 +163,49 @@ private:
|
|||
|
||||
extern SharedPtr<Thread> g_main_thread;
|
||||
|
||||
/// Sets up the primary application thread
|
||||
SharedPtr<Thread> SetupMainThread(s32 priority, u32 stack_size);
|
||||
/**
|
||||
* Sets up the primary application thread
|
||||
* @param stack_size The size of the thread's stack
|
||||
* @param entry_point The address at which the thread should start execution
|
||||
* @param priority The priority to give the main thread
|
||||
* @return A shared pointer to the main thread
|
||||
*/
|
||||
SharedPtr<Thread> SetupMainThread(u32 stack_size, u32 entry_point, s32 priority);
|
||||
|
||||
/// Reschedules to the next available thread (call after current thread is suspended)
|
||||
/**
|
||||
* Reschedules to the next available thread (call after current thread is suspended)
|
||||
*/
|
||||
void Reschedule();
|
||||
|
||||
/// Arbitrate the highest priority thread that is waiting
|
||||
/**
|
||||
* Arbitrate the highest priority thread that is waiting
|
||||
* @param address The address for which waiting threads should be arbitrated
|
||||
*/
|
||||
Thread* ArbitrateHighestPriorityThread(u32 address);
|
||||
|
||||
/// Arbitrate all threads currently waiting...
|
||||
/**
|
||||
* Arbitrate all threads currently waiting.
|
||||
* @param address The address for which waiting threads should be arbitrated
|
||||
*/
|
||||
void ArbitrateAllThreads(u32 address);
|
||||
|
||||
/// Gets the current thread
|
||||
/**
|
||||
* Gets the current thread
|
||||
*/
|
||||
Thread* GetCurrentThread();
|
||||
|
||||
/// Waits the current thread on a sleep
|
||||
/**
|
||||
* Waits the current thread on a sleep
|
||||
*/
|
||||
void WaitCurrentThread_Sleep();
|
||||
|
||||
/**
|
||||
* Waits the current thread from a WaitSynchronization call
|
||||
* @param wait_object Kernel object that we are waiting on
|
||||
* @param wait_objects Kernel objects that we are waiting on
|
||||
* @param wait_set_output If true, set the output parameter on thread wakeup (for WaitSynchronizationN only)
|
||||
* @param wait_all If true, wait on all objects before resuming (for WaitSynchronizationN only)
|
||||
*/
|
||||
void WaitCurrentThread_WaitSynchronization(SharedPtr<WaitObject> wait_object, bool wait_set_output, bool wait_all);
|
||||
void WaitCurrentThread_WaitSynchronization(std::vector<SharedPtr<WaitObject>> wait_objects, bool wait_set_output, bool wait_all);
|
||||
|
||||
/**
|
||||
* Waits the current thread from an ArbitrateAddress call
|
||||
|
|
@ -172,14 +217,18 @@ void WaitCurrentThread_ArbitrateAddress(VAddr wait_address);
|
|||
* Sets up the idle thread, this is a thread that is intended to never execute instructions,
|
||||
* only to advance the timing. It is scheduled when there are no other ready threads in the thread queue
|
||||
* and will try to yield on every call.
|
||||
* @returns The handle of the idle thread
|
||||
* @return The handle of the idle thread
|
||||
*/
|
||||
SharedPtr<Thread> SetupIdleThread();
|
||||
|
||||
/// Initialize threading
|
||||
/**
|
||||
* Initialize threading
|
||||
*/
|
||||
void ThreadingInit();
|
||||
|
||||
/// Shutdown threading
|
||||
/**
|
||||
* Shutdown threading
|
||||
*/
|
||||
void ThreadingShutdown();
|
||||
|
||||
} // namespace
|
||||
|
|
|
|||
|
|
@ -150,7 +150,7 @@ static ResultCode WaitSynchronization1(Handle handle, s64 nano_seconds) {
|
|||
if (object->ShouldWait()) {
|
||||
|
||||
object->AddWaitingThread(Kernel::GetCurrentThread());
|
||||
Kernel::WaitCurrentThread_WaitSynchronization(object, false, false);
|
||||
Kernel::WaitCurrentThread_WaitSynchronization({ object }, false, false);
|
||||
|
||||
// Create an event to wake the thread up after the specified nanosecond delay has passed
|
||||
Kernel::GetCurrentThread()->WakeAfterDelay(nano_seconds);
|
||||
|
|
@ -212,7 +212,6 @@ static ResultCode WaitSynchronizationN(s32* out, Handle* handles, s32 handle_cou
|
|||
// NOTE: This should deadlock the current thread if no timeout was specified
|
||||
if (!wait_all) {
|
||||
wait_thread = true;
|
||||
Kernel::WaitCurrentThread_WaitSynchronization(nullptr, true, wait_all);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -222,12 +221,17 @@ static ResultCode WaitSynchronizationN(s32* out, Handle* handles, s32 handle_cou
|
|||
if (wait_thread) {
|
||||
|
||||
// Actually wait the current thread on each object if we decided to wait...
|
||||
std::vector<SharedPtr<Kernel::WaitObject>> wait_objects;
|
||||
wait_objects.reserve(handle_count);
|
||||
|
||||
for (int i = 0; i < handle_count; ++i) {
|
||||
auto object = Kernel::g_handle_table.GetWaitObject(handles[i]);
|
||||
object->AddWaitingThread(Kernel::GetCurrentThread());
|
||||
Kernel::WaitCurrentThread_WaitSynchronization(object, true, wait_all);
|
||||
wait_objects.push_back(object);
|
||||
}
|
||||
|
||||
Kernel::WaitCurrentThread_WaitSynchronization(std::move(wait_objects), true, wait_all);
|
||||
|
||||
// Create an event to wake the thread up after the specified nanosecond delay has passed
|
||||
Kernel::GetCurrentThread()->WakeAfterDelay(nano_seconds);
|
||||
|
||||
|
|
@ -319,7 +323,7 @@ static ResultCode CreateThread(u32* out_handle, u32 priority, u32 entry_point, u
|
|||
}
|
||||
|
||||
CASCADE_RESULT(SharedPtr<Thread> thread, Kernel::Thread::Create(
|
||||
name, entry_point, priority, arg, processor_id, stack_top, Kernel::DEFAULT_STACK_SIZE));
|
||||
name, entry_point, priority, arg, processor_id, stack_top));
|
||||
CASCADE_RESULT(*out_handle, Kernel::g_handle_table.Create(std::move(thread)));
|
||||
|
||||
LOG_TRACE(Kernel_SVC, "called entrypoint=0x%08X (%s), arg=0x%08X, stacktop=0x%08X, "
|
||||
|
|
@ -338,7 +342,7 @@ static ResultCode CreateThread(u32* out_handle, u32 priority, u32 entry_point, u
|
|||
static void ExitThread() {
|
||||
LOG_TRACE(Kernel_SVC, "called, pc=0x%08X", Core::g_app_core->GetPC());
|
||||
|
||||
Kernel::GetCurrentThread()->Stop(__func__);
|
||||
Kernel::GetCurrentThread()->Stop();
|
||||
HLE::Reschedule(__func__);
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue