core: hle: kernel: Update KSynchronizationObject.
bunnei
parent
1ae883435d
commit
35c3c078e3
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// Copyright 2021 yuzu Emulator 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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#include "common/assert.h"
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#include "common/common_types.h"
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#include "core/hle/kernel/k_scheduler.h"
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#include "core/hle/kernel/k_scoped_scheduler_lock_and_sleep.h"
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#include "core/hle/kernel/k_synchronization_object.h"
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#include "core/hle/kernel/kernel.h"
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#include "core/hle/kernel/svc_results.h"
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#include "core/hle/kernel/thread.h"
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namespace Kernel {
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ResultCode KSynchronizationObject::Wait(KernelCore& kernel, s32* out_index,
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KSynchronizationObject** objects, const s32 num_objects,
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s64 timeout) {
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// Allocate space on stack for thread nodes.
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std::vector<ThreadListNode> thread_nodes(num_objects);
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// Prepare for wait.
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Thread* thread = kernel.CurrentScheduler()->GetCurrentThread();
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Handle timer = InvalidHandle;
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{
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// Setup the scheduling lock and sleep.
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KScopedSchedulerLockAndSleep slp(kernel, timer, thread, timeout);
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// Check if any of the objects are already signaled.
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for (auto i = 0; i < num_objects; ++i) {
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ASSERT(objects[i] != nullptr);
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if (objects[i]->IsSignaled()) {
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*out_index = i;
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slp.CancelSleep();
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return RESULT_SUCCESS;
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}
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}
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// Check if the timeout is zero.
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if (timeout == 0) {
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slp.CancelSleep();
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return Svc::ResultTimedOut;
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}
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// Check if the thread should terminate.
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if (thread->IsTerminationRequested()) {
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slp.CancelSleep();
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return Svc::ResultTerminationRequested;
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}
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// Check if waiting was canceled.
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if (thread->IsWaitCancelled()) {
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slp.CancelSleep();
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thread->ClearWaitCancelled();
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return Svc::ResultCancelled;
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}
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// Add the waiters.
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for (auto i = 0; i < num_objects; ++i) {
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thread_nodes[i].thread = thread;
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thread_nodes[i].next = nullptr;
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if (objects[i]->thread_list_tail == nullptr) {
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objects[i]->thread_list_head = std::addressof(thread_nodes[i]);
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} else {
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objects[i]->thread_list_tail->next = std::addressof(thread_nodes[i]);
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}
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objects[i]->thread_list_tail = std::addressof(thread_nodes[i]);
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}
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// For debugging only
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thread->SetWaitObjectsForDebugging(objects, num_objects);
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// Mark the thread as waiting.
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thread->SetCancellable();
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thread->SetSyncedObject(nullptr, Svc::ResultTimedOut);
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thread->SetState(ThreadState::WaitSynch);
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}
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// The lock/sleep is done, so we should be able to get our result.
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// Thread is no longer cancellable.
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thread->ClearCancellable();
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// For debugging only
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thread->SetWaitObjectsForDebugging(nullptr, 0);
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// Cancel the timer as needed.
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if (timer != InvalidHandle) {
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auto& time_manager = kernel.TimeManager();
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time_manager.UnscheduleTimeEvent(timer);
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}
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// Get the wait result.
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ResultCode wait_result{RESULT_SUCCESS};
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s32 sync_index = -1;
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{
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KScopedSchedulerLock lock(kernel);
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KSynchronizationObject* synced_obj;
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wait_result = thread->GetWaitResult(std::addressof(synced_obj));
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for (auto i = 0; i < num_objects; ++i) {
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// Unlink the object from the list.
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ThreadListNode* prev_ptr =
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reinterpret_cast<ThreadListNode*>(std::addressof(objects[i]->thread_list_head));
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ThreadListNode* prev_val = nullptr;
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ThreadListNode *prev, *tail_prev;
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do {
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prev = prev_ptr;
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prev_ptr = prev_ptr->next;
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tail_prev = prev_val;
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prev_val = prev_ptr;
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} while (prev_ptr != std::addressof(thread_nodes[i]));
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if (objects[i]->thread_list_tail == std::addressof(thread_nodes[i])) {
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objects[i]->thread_list_tail = tail_prev;
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}
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prev->next = thread_nodes[i].next;
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if (objects[i] == synced_obj) {
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sync_index = i;
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}
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}
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}
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// Set output.
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*out_index = sync_index;
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return wait_result;
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}
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KSynchronizationObject::KSynchronizationObject(KernelCore& kernel) : Object{kernel} {}
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KSynchronizationObject ::~KSynchronizationObject() = default;
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void KSynchronizationObject::NotifyAvailable(ResultCode result) {
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KScopedSchedulerLock lock(kernel);
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// If we're not signaled, we've nothing to notify.
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if (!this->IsSignaled()) {
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return;
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}
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// Iterate over each thread.
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for (auto* cur_node = thread_list_head; cur_node != nullptr; cur_node = cur_node->next) {
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Thread* thread = cur_node->thread;
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if (thread->GetState() == ThreadSchedStatus::Paused) {
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thread->SetSyncedObject(this, result);
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thread->SetState(ThreadStatus::Ready);
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}
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}
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}
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std::vector<Thread*> KSynchronizationObject::GetWaitingThreadsForDebugging() const {
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std::vector<Thread*> threads;
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// If debugging, dump the list of waiters.
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{
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KScopedSchedulerLock lock(kernel);
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for (auto* cur_node = thread_list_head; cur_node != nullptr; cur_node = cur_node->next) {
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threads.emplace_back(cur_node->thread);
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}
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}
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return threads;
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}
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} // namespace Kernel
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@ -0,0 +1,58 @@
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// Copyright 2021 yuzu Emulator 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 <vector>
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#include "core/hle/kernel/object.h"
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#include "core/hle/result.h"
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namespace Kernel {
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class KernelCore;
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class Synchronization;
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class Thread;
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/// Class that represents a Kernel object that a thread can be waiting on
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class KSynchronizationObject : public Object {
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public:
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struct ThreadListNode {
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ThreadListNode* next{};
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Thread* thread{};
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};
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[[nodiscard]] static ResultCode Wait(KernelCore& kernel, s32* out_index,
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KSynchronizationObject** objects, const s32 num_objects,
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s64 timeout);
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[[nodiscard]] virtual bool IsSignaled() const = 0;
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[[nodiscard]] std::vector<Thread*> GetWaitingThreadsForDebugging() const;
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protected:
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explicit KSynchronizationObject(KernelCore& kernel);
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virtual ~KSynchronizationObject();
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void NotifyAvailable(ResultCode result);
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void NotifyAvailable() {
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return this->NotifyAvailable(RESULT_SUCCESS);
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}
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private:
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ThreadListNode* thread_list_head{};
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ThreadListNode* thread_list_tail{};
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};
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// Specialization of DynamicObjectCast for KSynchronizationObjects
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template <>
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inline std::shared_ptr<KSynchronizationObject> DynamicObjectCast<KSynchronizationObject>(
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std::shared_ptr<Object> object) {
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if (object != nullptr && object->IsWaitable()) {
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return std::static_pointer_cast<KSynchronizationObject>(object);
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}
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return nullptr;
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}
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} // namespace Kernel
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@ -1,116 +0,0 @@
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// Copyright 2020 yuzu Emulator 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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#include "core/core.h"
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#include "core/hle/kernel/errors.h"
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#include "core/hle/kernel/handle_table.h"
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#include "core/hle/kernel/k_scheduler.h"
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#include "core/hle/kernel/k_scoped_scheduler_lock_and_sleep.h"
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#include "core/hle/kernel/kernel.h"
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#include "core/hle/kernel/synchronization.h"
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#include "core/hle/kernel/synchronization_object.h"
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#include "core/hle/kernel/thread.h"
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#include "core/hle/kernel/time_manager.h"
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namespace Kernel {
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Synchronization::Synchronization(Core::System& system) : system{system} {}
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void Synchronization::SignalObject(SynchronizationObject& obj) const {
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auto& kernel = system.Kernel();
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KScopedSchedulerLock lock(kernel);
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if (obj.IsSignaled()) {
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for (auto thread : obj.GetWaitingThreads()) {
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if (thread->GetSchedulingStatus() == ThreadSchedStatus::Paused) {
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if (thread->GetStatus() != ThreadStatus::WaitHLEEvent) {
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ASSERT(thread->GetStatus() == ThreadStatus::WaitSynch);
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ASSERT(thread->IsWaitingSync());
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}
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thread->SetSynchronizationResults(&obj, RESULT_SUCCESS);
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thread->ResumeFromWait();
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}
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}
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obj.ClearWaitingThreads();
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}
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}
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std::pair<ResultCode, Handle> Synchronization::WaitFor(
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std::vector<std::shared_ptr<SynchronizationObject>>& sync_objects, s64 nano_seconds) {
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auto& kernel = system.Kernel();
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auto* const thread = kernel.CurrentScheduler()->GetCurrentThread();
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Handle event_handle = InvalidHandle;
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{
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KScopedSchedulerLockAndSleep lock(kernel, event_handle, thread, nano_seconds);
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const auto itr =
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std::find_if(sync_objects.begin(), sync_objects.end(),
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[thread](const std::shared_ptr<SynchronizationObject>& object) {
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return object->IsSignaled();
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});
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if (itr != sync_objects.end()) {
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// We found a ready object, acquire it and set the result value
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SynchronizationObject* object = itr->get();
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object->Acquire(thread);
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const u32 index = static_cast<s32>(std::distance(sync_objects.begin(), itr));
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lock.CancelSleep();
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return {RESULT_SUCCESS, index};
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}
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if (nano_seconds == 0) {
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lock.CancelSleep();
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return {RESULT_TIMEOUT, InvalidHandle};
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}
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if (thread->IsPendingTermination()) {
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lock.CancelSleep();
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return {ERR_THREAD_TERMINATING, InvalidHandle};
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}
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if (thread->IsSyncCancelled()) {
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thread->SetSyncCancelled(false);
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lock.CancelSleep();
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return {ERR_SYNCHRONIZATION_CANCELED, InvalidHandle};
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}
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for (auto& object : sync_objects) {
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object->AddWaitingThread(SharedFrom(thread));
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}
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thread->SetSynchronizationObjects(&sync_objects);
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thread->SetSynchronizationResults(nullptr, RESULT_TIMEOUT);
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thread->SetStatus(ThreadStatus::WaitSynch);
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thread->SetWaitingSync(true);
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}
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thread->SetWaitingSync(false);
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if (event_handle != InvalidHandle) {
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auto& time_manager = kernel.TimeManager();
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time_manager.UnscheduleTimeEvent(event_handle);
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}
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{
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KScopedSchedulerLock lock(kernel);
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ResultCode signaling_result = thread->GetSignalingResult();
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SynchronizationObject* signaling_object = thread->GetSignalingObject();
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thread->SetSynchronizationObjects(nullptr);
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auto shared_thread = SharedFrom(thread);
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for (auto& obj : sync_objects) {
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obj->RemoveWaitingThread(shared_thread);
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}
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if (signaling_object != nullptr) {
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const auto itr = std::find_if(
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sync_objects.begin(), sync_objects.end(),
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[signaling_object](const std::shared_ptr<SynchronizationObject>& object) {
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return object.get() == signaling_object;
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});
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ASSERT(itr != sync_objects.end());
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signaling_object->Acquire(thread);
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const u32 index = static_cast<s32>(std::distance(sync_objects.begin(), itr));
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return {signaling_result, index};
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}
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return {signaling_result, -1};
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}
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}
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} // namespace Kernel
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@ -1,44 +0,0 @@
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// Copyright 2020 yuzu Emulator 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 <memory>
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#include <utility>
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#include <vector>
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#include "core/hle/kernel/object.h"
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#include "core/hle/result.h"
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namespace Core {
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class System;
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} // namespace Core
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namespace Kernel {
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class SynchronizationObject;
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/**
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* The 'Synchronization' class is an interface for handling synchronization methods
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* used by Synchronization objects and synchronization SVCs. This centralizes processing of
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* such
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*/
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class Synchronization {
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public:
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explicit Synchronization(Core::System& system);
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/// Signals a synchronization object, waking up all its waiting threads
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void SignalObject(SynchronizationObject& obj) const;
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/// Tries to see if waiting for any of the sync_objects is necessary, if not
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/// it returns Success and the handle index of the signaled sync object. In
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/// case not, the current thread will be locked and wait for nano_seconds or
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/// for a synchronization object to signal.
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std::pair<ResultCode, Handle> WaitFor(
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std::vector<std::shared_ptr<SynchronizationObject>>& sync_objects, s64 nano_seconds);
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private:
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Core::System& system;
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};
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} // namespace Kernel
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@ -1,49 +0,0 @@
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// Copyright 2014 Citra Emulator 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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#include <algorithm>
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#include "common/assert.h"
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#include "common/common_types.h"
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#include "common/logging/log.h"
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#include "core/core.h"
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#include "core/hle/kernel/kernel.h"
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#include "core/hle/kernel/object.h"
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#include "core/hle/kernel/process.h"
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#include "core/hle/kernel/synchronization.h"
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#include "core/hle/kernel/synchronization_object.h"
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#include "core/hle/kernel/thread.h"
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namespace Kernel {
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SynchronizationObject::SynchronizationObject(KernelCore& kernel) : Object{kernel} {}
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SynchronizationObject::~SynchronizationObject() = default;
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void SynchronizationObject::Signal() {
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kernel.Synchronization().SignalObject(*this);
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}
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void SynchronizationObject::AddWaitingThread(std::shared_ptr<Thread> thread) {
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auto itr = std::find(waiting_threads.begin(), waiting_threads.end(), thread);
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if (itr == waiting_threads.end())
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waiting_threads.push_back(std::move(thread));
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}
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void SynchronizationObject::RemoveWaitingThread(std::shared_ptr<Thread> thread) {
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auto itr = std::find(waiting_threads.begin(), waiting_threads.end(), thread);
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// If a thread passed multiple handles to the same object,
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// the kernel might attempt to remove the thread from the object's
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// waiting threads list multiple times.
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if (itr != waiting_threads.end())
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waiting_threads.erase(itr);
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}
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void SynchronizationObject::ClearWaitingThreads() {
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waiting_threads.clear();
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}
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const std::vector<std::shared_ptr<Thread>>& SynchronizationObject::GetWaitingThreads() const {
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return waiting_threads;
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}
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} // namespace Kernel
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@ -1,77 +0,0 @@
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// Copyright 2014 Citra Emulator 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 <atomic>
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#include <memory>
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#include <vector>
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#include "core/hle/kernel/object.h"
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namespace Kernel {
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class KernelCore;
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class Synchronization;
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class Thread;
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/// Class that represents a Kernel object that a thread can be waiting on
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class SynchronizationObject : public Object {
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public:
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explicit SynchronizationObject(KernelCore& kernel);
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~SynchronizationObject() override;
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/**
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* Check if the specified thread should wait until the object is available
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* @param thread The thread about which we're deciding.
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* @return True if the current thread should wait due to this object being unavailable
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*/
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virtual bool ShouldWait(const Thread* thread) const = 0;
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/// Acquire/lock the object for the specified thread if it is available
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virtual void Acquire(Thread* thread) = 0;
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/// Signal this object
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virtual void Signal();
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virtual bool IsSignaled() const {
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return is_signaled;
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}
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/**
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* Add a thread to wait on this object
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* @param thread Pointer to thread to add
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*/
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void AddWaitingThread(std::shared_ptr<Thread> thread);
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/**
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* Removes a thread from waiting on this object (e.g. if it was resumed already)
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* @param thread Pointer to thread to remove
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*/
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void RemoveWaitingThread(std::shared_ptr<Thread> thread);
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/// Get a const reference to the waiting threads list for debug use
|
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const std::vector<std::shared_ptr<Thread>>& GetWaitingThreads() const;
|
||||
|
||||
void ClearWaitingThreads();
|
||||
|
||||
protected:
|
||||
std::atomic_bool is_signaled{}; // Tells if this sync object is signaled
|
||||
|
||||
private:
|
||||
/// Threads waiting for this object to become available
|
||||
std::vector<std::shared_ptr<Thread>> waiting_threads;
|
||||
};
|
||||
|
||||
// Specialization of DynamicObjectCast for SynchronizationObjects
|
||||
template <>
|
||||
inline std::shared_ptr<SynchronizationObject> DynamicObjectCast<SynchronizationObject>(
|
||||
std::shared_ptr<Object> object) {
|
||||
if (object != nullptr && object->IsWaitable()) {
|
||||
return std::static_pointer_cast<SynchronizationObject>(object);
|
||||
}
|
||||
return nullptr;
|
||||
}
|
||||
|
||||
} // namespace Kernel
|
||||
Loading…
Reference in New Issue