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// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <vector>
#include "core/hle/kernel/k_auto_object.h"
#include "core/hle/result.h"
namespace Kernel {
class KernelCore;
class Synchronization;
class KThread;
/// Class that represents a Kernel object that a thread can be waiting on
class KSynchronizationObject : public KAutoObjectWithList {
KERNEL_AUTOOBJECT_TRAITS(KSynchronizationObject, KAutoObject);
public:
struct ThreadListNode {
ThreadListNode* next{};
KThread* thread{};
};
[[nodiscard]] static Result Wait(KernelCore& kernel, s32* out_index,
KSynchronizationObject** objects, const s32 num_objects,
s64 timeout);
void Finalize() override;
[[nodiscard]] virtual bool IsSignaled() const = 0;
[[nodiscard]] std::vector<KThread*> GetWaitingThreadsForDebugging() const;
void LinkNode(ThreadListNode* node_) {
// Link the node to the list.
if (thread_list_tail == nullptr) {
thread_list_head = node_;
} else {
thread_list_tail->next = node_;
}
thread_list_tail = node_;
}
void UnlinkNode(ThreadListNode* node_) {
// Unlink the node from the list.
ThreadListNode* prev_ptr =
reinterpret_cast<ThreadListNode*>(std::addressof(thread_list_head));
ThreadListNode* prev_val = nullptr;
ThreadListNode *prev, *tail_prev;
do {
prev = prev_ptr;
prev_ptr = prev_ptr->next;
tail_prev = prev_val;
prev_val = prev_ptr;
} while (prev_ptr != node_);
if (thread_list_tail == node_) {
thread_list_tail = tail_prev;
}
prev->next = node_->next;
}
protected:
explicit KSynchronizationObject(KernelCore& kernel);
~KSynchronizationObject() override;
virtual void OnFinalizeSynchronizationObject() {}
void NotifyAvailable(Result result);
void NotifyAvailable() {
return this->NotifyAvailable(ResultSuccess);
}
private:
ThreadListNode* thread_list_head{};
ThreadListNode* thread_list_tail{};
};
} // namespace Kernel
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