Atmosphere/libraries/libstratosphere/source/os/impl/os_waitable_manager_impl.hpp

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/*
* 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 "os_waitable_holder_base.hpp"
namespace ams::os::impl {
class WaitableManagerImpl {
public:
static constexpr size_t MaximumHandleCount = 0x40;
static constexpr s32 WaitInvalid = -3;
static constexpr s32 WaitCancelled = -2;
static constexpr s32 WaitTimedOut = -1;
using ListType = util::IntrusiveListMemberTraits<&WaitableHolderBase::manager_node>::ListType;
private:
ListType waitable_list;
WaitableHolderBase *signaled_holder;
u64 current_time;
Mutex lock;
Handle waiting_thread_handle;
private:
WaitableHolderBase *WaitAnyImpl(bool infinite, u64 timeout);
WaitableHolderBase *WaitAnyHandleImpl(bool infinite, u64 timeout);
s32 WaitSynchronization(Handle *handles, size_t count, u64 timeout);
size_t BuildHandleArray(Handle *out_handles, WaitableHolderBase **out_objects);
WaitableHolderBase *LinkHoldersToObjectList();
void UnlinkHoldersFromObjectList();
WaitableHolderBase *RecalculateNextTimeout(u64 *out_min_timeout, u64 end_time);
public:
/* Wait. */
WaitableHolderBase *WaitAny() {
return this->WaitAnyImpl(true, std::numeric_limits<u64>::max());
}
WaitableHolderBase *TryWaitAny() {
return this->WaitAnyImpl(false, 0);
}
WaitableHolderBase *TimedWaitAny(u64 timeout) {
return this->WaitAnyImpl(false, timeout);
}
/* List management. */
bool IsEmpty() const {
return this->waitable_list.empty();
}
void LinkWaitableHolder(WaitableHolderBase &holder_base) {
this->waitable_list.push_back(holder_base);
}
void UnlinkWaitableHolder(WaitableHolderBase &holder_base) {
this->waitable_list.erase(this->waitable_list.iterator_to(holder_base));
}
void UnlinkAll() {
while (!this->IsEmpty()) {
this->waitable_list.front().SetManager(nullptr);
this->waitable_list.pop_front();
}
}
void MoveAllFrom(WaitableManagerImpl &other) {
/* Set manager for all of the other's waitables. */
for (auto &w : other.waitable_list) {
w.SetManager(this);
}
this->waitable_list.splice(this->waitable_list.end(), other.waitable_list);
}
/* Other. */
u64 GetCurrentTime() const {
return this->current_time;
}
void SignalAndWakeupThread(WaitableHolderBase *holder_base);
};
}