yuzu/src/core/hle/kernel/thread.h
Lioncash 6300ccbc3c kernel: Make handle type declarations constexpr
Some objects declare their handle type as const, while others declare it
as constexpr. This makes the const ones constexpr for consistency, and
prevent unexpected compilation errors if these happen to be attempted to be
used within a constexpr context.
2019-04-11 16:34:53 -04:00

474 lines
14 KiB
C++

// Copyright 2014 Citra Emulator Project / PPSSPP Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <functional>
#include <memory>
#include <string>
#include <vector>
#include "common/common_types.h"
#include "core/arm/arm_interface.h"
#include "core/hle/kernel/object.h"
#include "core/hle/kernel/wait_object.h"
#include "core/hle/result.h"
namespace Kernel {
class KernelCore;
class Process;
class Scheduler;
enum ThreadPriority : u32 {
THREADPRIO_HIGHEST = 0, ///< Highest thread priority
THREADPRIO_USERLAND_MAX = 24, ///< Highest thread priority for userland apps
THREADPRIO_DEFAULT = 44, ///< Default thread priority for userland apps
THREADPRIO_LOWEST = 63, ///< Lowest thread priority
THREADPRIO_COUNT = 64, ///< Total number of possible thread priorities.
};
enum ThreadProcessorId : s32 {
THREADPROCESSORID_IDEAL = -2, ///< Run thread on the ideal core specified by the process.
THREADPROCESSORID_0 = 0, ///< Run thread on core 0
THREADPROCESSORID_1 = 1, ///< Run thread on core 1
THREADPROCESSORID_2 = 2, ///< Run thread on core 2
THREADPROCESSORID_3 = 3, ///< Run thread on core 3
THREADPROCESSORID_MAX = 4, ///< Processor ID must be less than this
/// Allowed CPU mask
THREADPROCESSORID_DEFAULT_MASK = (1 << THREADPROCESSORID_0) | (1 << THREADPROCESSORID_1) |
(1 << THREADPROCESSORID_2) | (1 << THREADPROCESSORID_3)
};
enum class ThreadStatus {
Running, ///< Currently running
Ready, ///< Ready to run
Paused, ///< Paused by SetThreadActivity or debug
WaitHLEEvent, ///< Waiting for hle event to finish
WaitSleep, ///< Waiting due to a SleepThread SVC
WaitIPC, ///< Waiting for the reply from an IPC request
WaitSynchAny, ///< Waiting due to WaitSynch1 or WaitSynchN with wait_all = false
WaitSynchAll, ///< Waiting due to WaitSynchronizationN with wait_all = true
WaitMutex, ///< Waiting due to an ArbitrateLock svc
WaitCondVar, ///< Waiting due to an WaitProcessWideKey svc
WaitArb, ///< Waiting due to a SignalToAddress/WaitForAddress svc
Dormant, ///< Created but not yet made ready
Dead ///< Run to completion, or forcefully terminated
};
enum class ThreadWakeupReason {
Signal, // The thread was woken up by WakeupAllWaitingThreads due to an object signal.
Timeout // The thread was woken up due to a wait timeout.
};
enum class ThreadActivity : u32 {
Normal = 0,
Paused = 1,
};
class Thread final : public WaitObject {
public:
using TLSMemory = std::vector<u8>;
using TLSMemoryPtr = std::shared_ptr<TLSMemory>;
using MutexWaitingThreads = std::vector<SharedPtr<Thread>>;
using ThreadContext = Core::ARM_Interface::ThreadContext;
using ThreadWaitObjects = std::vector<SharedPtr<WaitObject>>;
using WakeupCallback = std::function<bool(ThreadWakeupReason reason, SharedPtr<Thread> thread,
SharedPtr<WaitObject> object, std::size_t index)>;
/**
* Creates and returns a new thread. The new thread is immediately scheduled
* @param kernel The kernel instance this thread will be created under.
* @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 owner_process The parent process for the thread
* @return A shared pointer to the newly created thread
*/
static ResultVal<SharedPtr<Thread>> Create(KernelCore& kernel, std::string name,
VAddr entry_point, u32 priority, u64 arg,
s32 processor_id, VAddr stack_top,
Process& owner_process);
std::string GetName() const override {
return name;
}
std::string GetTypeName() const override {
return "Thread";
}
static constexpr HandleType HANDLE_TYPE = HandleType::Thread;
HandleType GetHandleType() const override {
return HANDLE_TYPE;
}
bool ShouldWait(const Thread* thread) const override;
void Acquire(Thread* thread) override;
/**
* Gets the thread's current priority
* @return The current thread's priority
*/
u32 GetPriority() const {
return current_priority;
}
/**
* Gets the thread's nominal priority.
* @return The current thread's nominal priority.
*/
u32 GetNominalPriority() const {
return nominal_priority;
}
/**
* Sets the thread's current priority
* @param priority The new priority
*/
void SetPriority(u32 priority);
/**
* Temporarily boosts the thread's priority until the next time it is scheduled
* @param priority The new priority
*/
void BoostPriority(u32 priority);
/// Adds a thread to the list of threads that are waiting for a lock held by this thread.
void AddMutexWaiter(SharedPtr<Thread> thread);
/// Removes a thread from the list of threads that are waiting for a lock held by this thread.
void RemoveMutexWaiter(SharedPtr<Thread> thread);
/// Recalculates the current priority taking into account priority inheritance.
void UpdatePriority();
/// Changes the core that the thread is running or scheduled to run on.
void ChangeCore(u32 core, u64 mask);
/**
* Gets the thread's thread ID
* @return The thread's ID
*/
u64 GetThreadID() const {
return thread_id;
}
TLSMemoryPtr& GetTLSMemory() {
return tls_memory;
}
const TLSMemoryPtr& GetTLSMemory() const {
return tls_memory;
}
/**
* 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
*/
void WakeAfterDelay(s64 nanoseconds);
/// Cancel any outstanding wakeup events for this thread
void CancelWakeupTimer();
/**
* Sets the result after the thread awakens (from either WaitSynchronization SVC)
* @param result Value to set to the returned result
*/
void SetWaitSynchronizationResult(ResultCode result);
/**
* Sets the output parameter value after the thread awakens (from WaitSynchronizationN SVC only)
* @param output Value to set to the output parameter
*/
void SetWaitSynchronizationOutput(s32 output);
/**
* Retrieves the index that this particular object occupies in the list of objects
* that the thread passed to WaitSynchronizationN, starting the search from the last element.
* It is used to set the output value of WaitSynchronizationN when the thread is awakened.
* When a thread wakes up due to an object signal, the kernel will use the index of the last
* matching object in the wait objects list in case of having multiple instances of the same
* object in the list.
* @param object Object to query the index of.
*/
s32 GetWaitObjectIndex(const WaitObject* object) const;
/**
* Stops a thread, invalidating it from further use
*/
void Stop();
/*
* Returns the Thread Local Storage address of the current thread
* @returns VAddr of the thread's TLS
*/
VAddr GetTLSAddress() const {
return tls_address;
}
/*
* Returns the value of the TPIDR_EL0 Read/Write system register for this thread.
* @returns The value of the TPIDR_EL0 register.
*/
u64 GetTPIDR_EL0() const {
return tpidr_el0;
}
/// Sets the value of the TPIDR_EL0 Read/Write system register for this thread.
void SetTPIDR_EL0(u64 value) {
tpidr_el0 = value;
}
/*
* Returns the address of the current thread's command buffer, located in the TLS.
* @returns VAddr of the thread's command buffer.
*/
VAddr GetCommandBufferAddress() const;
/**
* Returns whether this thread is waiting for all the objects in
* its wait list to become ready, as a result of a WaitSynchronizationN call
* with wait_all = true.
*/
bool IsSleepingOnWaitAll() const {
return status == ThreadStatus::WaitSynchAll;
}
ThreadContext& GetContext() {
return context;
}
const ThreadContext& GetContext() const {
return context;
}
ThreadStatus GetStatus() const {
return status;
}
void SetStatus(ThreadStatus new_status);
u64 GetLastRunningTicks() const {
return last_running_ticks;
}
u64 GetTotalCPUTimeTicks() const {
return total_cpu_time_ticks;
}
void UpdateCPUTimeTicks(u64 ticks) {
total_cpu_time_ticks += ticks;
}
s32 GetProcessorID() const {
return processor_id;
}
Process* GetOwnerProcess() {
return owner_process;
}
const Process* GetOwnerProcess() const {
return owner_process;
}
const ThreadWaitObjects& GetWaitObjects() const {
return wait_objects;
}
void SetWaitObjects(ThreadWaitObjects objects) {
wait_objects = std::move(objects);
}
void ClearWaitObjects() {
wait_objects.clear();
}
/// Determines whether all the objects this thread is waiting on are ready.
bool AllWaitObjectsReady() const;
const MutexWaitingThreads& GetMutexWaitingThreads() const {
return wait_mutex_threads;
}
Thread* GetLockOwner() const {
return lock_owner.get();
}
void SetLockOwner(SharedPtr<Thread> owner) {
lock_owner = std::move(owner);
}
VAddr GetCondVarWaitAddress() const {
return condvar_wait_address;
}
void SetCondVarWaitAddress(VAddr address) {
condvar_wait_address = address;
}
VAddr GetMutexWaitAddress() const {
return mutex_wait_address;
}
void SetMutexWaitAddress(VAddr address) {
mutex_wait_address = address;
}
Handle GetWaitHandle() const {
return wait_handle;
}
void SetWaitHandle(Handle handle) {
wait_handle = handle;
}
VAddr GetArbiterWaitAddress() const {
return arb_wait_address;
}
void SetArbiterWaitAddress(VAddr address) {
arb_wait_address = address;
}
void SetGuestHandle(Handle handle) {
guest_handle = handle;
}
bool HasWakeupCallback() const {
return wakeup_callback != nullptr;
}
void SetWakeupCallback(WakeupCallback callback) {
wakeup_callback = std::move(callback);
}
void InvalidateWakeupCallback() {
SetWakeupCallback(nullptr);
}
/**
* Invokes the thread's wakeup callback.
*
* @pre A valid wakeup callback has been set. Violating this precondition
* will cause an assertion to trigger.
*/
bool InvokeWakeupCallback(ThreadWakeupReason reason, SharedPtr<Thread> thread,
SharedPtr<WaitObject> object, std::size_t index);
u32 GetIdealCore() const {
return ideal_core;
}
u64 GetAffinityMask() const {
return affinity_mask;
}
ThreadActivity GetActivity() const {
return activity;
}
void SetActivity(ThreadActivity value);
/// Sleeps this thread for the given amount of nanoseconds.
void Sleep(s64 nanoseconds);
private:
explicit Thread(KernelCore& kernel);
~Thread() override;
void ChangeScheduler();
Core::ARM_Interface::ThreadContext context{};
u64 thread_id = 0;
ThreadStatus status = ThreadStatus::Dormant;
VAddr entry_point = 0;
VAddr stack_top = 0;
/// Nominal thread priority, as set by the emulated application.
/// The nominal priority is the thread priority without priority
/// inheritance taken into account.
u32 nominal_priority = 0;
/// Current thread priority. This may change over the course of the
/// thread's lifetime in order to facilitate priority inheritance.
u32 current_priority = 0;
u64 total_cpu_time_ticks = 0; ///< Total CPU running ticks.
u64 last_running_ticks = 0; ///< CPU tick when thread was last running
s32 processor_id = 0;
VAddr tls_address = 0; ///< Virtual address of the Thread Local Storage of the thread
u64 tpidr_el0 = 0; ///< TPIDR_EL0 read/write system register.
/// Process that owns this thread
Process* owner_process;
/// Objects that the thread is waiting on, in the same order as they were
/// passed to WaitSynchronization1/N.
ThreadWaitObjects wait_objects;
/// List of threads that are waiting for a mutex that is held by this thread.
MutexWaitingThreads wait_mutex_threads;
/// Thread that owns the lock that this thread is waiting for.
SharedPtr<Thread> lock_owner;
/// If waiting on a ConditionVariable, this is the ConditionVariable address
VAddr condvar_wait_address = 0;
/// If waiting on a Mutex, this is the mutex address
VAddr mutex_wait_address = 0;
/// The handle used to wait for the mutex.
Handle wait_handle = 0;
/// If waiting for an AddressArbiter, this is the address being waited on.
VAddr arb_wait_address{0};
/// Handle used by guest emulated application to access this thread
Handle guest_handle = 0;
/// Handle used as userdata to reference this object when inserting into the CoreTiming queue.
Handle callback_handle = 0;
/// Callback that will be invoked when the thread is resumed from a waiting state. If the thread
/// was waiting via WaitSynchronizationN then the object will be the last object that became
/// available. In case of a timeout, the object will be nullptr.
WakeupCallback wakeup_callback;
Scheduler* scheduler = nullptr;
u32 ideal_core{0xFFFFFFFF};
u64 affinity_mask{0x1};
TLSMemoryPtr tls_memory = std::make_shared<TLSMemory>();
std::string name;
ThreadActivity activity = ThreadActivity::Normal;
};
/**
* Gets the current thread
*/
Thread* GetCurrentThread();
} // namespace Kernel