Atmosphere/libraries/libmesosphere/include/mesosphere/kern_k_synchronization_object.hpp
2021-09-19 10:34:31 -07:00

84 lines
3.0 KiB
C++

/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <mesosphere/kern_k_auto_object.hpp>
#include <mesosphere/kern_slab_helpers.hpp>
namespace ams::kern {
class KThread;
class KSynchronizationObject : public KAutoObjectWithList {
MESOSPHERE_AUTOOBJECT_TRAITS(KSynchronizationObject, KAutoObject);
public:
struct ThreadListNode {
ThreadListNode *next;
KThread *thread;
};
private:
ThreadListNode *m_thread_list_head;
ThreadListNode *m_thread_list_tail;
protected:
constexpr ALWAYS_INLINE explicit KSynchronizationObject() : KAutoObjectWithList(), m_thread_list_head(), m_thread_list_tail() { MESOSPHERE_ASSERT_THIS(); }
virtual void OnFinalizeSynchronizationObject() { MESOSPHERE_ASSERT_THIS(); }
void NotifyAvailable(Result result);
void NotifyAvailable() {
return this->NotifyAvailable(ResultSuccess());
}
public:
static Result Wait(s32 *out_index, KSynchronizationObject **objects, const s32 num_objects, s64 timeout);
public:
virtual void Finalize() override;
virtual bool IsSignaled() const { AMS_INFINITE_LOOP(); }
void DumpWaiters();
ALWAYS_INLINE void LinkNode(ThreadListNode *node) {
/* Link the node to the list. */
if (m_thread_list_tail == nullptr) {
m_thread_list_head = node;
} else {
m_thread_list_tail->next = node;
}
m_thread_list_tail = node;
}
ALWAYS_INLINE void UnlinkNode(ThreadListNode *node) {
/* Unlink the node from the list. */
ThreadListNode *prev_ptr = reinterpret_cast<ThreadListNode *>(std::addressof(m_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 (m_thread_list_tail == node) {
m_thread_list_tail = tail_prev;
}
prev->next = node->next;
}
};
}