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// Copyright (c) 2020, 2021 by Apex.AI Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// SPDX-License-Identifier: Apache-2.0
#include "iceoryx_posh/popo/trigger_handle.hpp"
#include "iceoryx_posh/internal/popo/building_blocks/condition_notifier.hpp"
namespace iox
{
namespace popo
{
/// explicitly implemented for MSVC and QNX
TriggerHandle::TriggerHandle() noexcept
{
}
TriggerHandle::TriggerHandle(ConditionVariableData& conditionVariableData,
const cxx::MethodCallback<void, uint64_t> resetCallback,
const uint64_t uniqueTriggerId) noexcept
: m_conditionVariableDataPtr(&conditionVariableData)
, m_resetCallback(resetCallback)
, m_uniqueTriggerId(uniqueTriggerId)
{
if (!m_resetCallback)
{
errorHandler(Error::kPOPO__TRIGGER_HANDLE_INVALID_RESET_CALLBACK, nullptr, ErrorLevel::FATAL);
}
}
TriggerHandle::TriggerHandle(TriggerHandle&& rhs) noexcept
{
*this = std::move(rhs);
}
TriggerHandle& TriggerHandle::operator=(TriggerHandle&& rhs) noexcept
{
if (this != &rhs)
{
std::lock(m_mutex, rhs.m_mutex);
std::lock_guard<std::recursive_mutex> lock(m_mutex, std::adopt_lock);
std::lock_guard<std::recursive_mutex> lockRhs(rhs.m_mutex, std::adopt_lock);
reset();
m_conditionVariableDataPtr = rhs.m_conditionVariableDataPtr;
m_resetCallback = std::move(rhs.m_resetCallback);
m_uniqueTriggerId = rhs.m_uniqueTriggerId;
rhs.invalidate();
}
return *this;
}
TriggerHandle::~TriggerHandle() noexcept
{
reset();
}
TriggerHandle::operator bool() const noexcept
{
return isValid();
}
bool TriggerHandle::isValid() const noexcept
{
std::lock_guard<std::recursive_mutex> lock(m_mutex);
return m_conditionVariableDataPtr != nullptr;
}
void TriggerHandle::trigger() noexcept
{
std::lock_guard<std::recursive_mutex> lock(m_mutex);
if (isValid())
{
ConditionNotifier(*m_conditionVariableDataPtr, m_uniqueTriggerId).notify();
}
}
bool TriggerHandle::wasTriggered() const noexcept
{
std::lock_guard<std::recursive_mutex> lock(m_mutex);
if (m_conditionVariableDataPtr != nullptr)
{
return m_conditionVariableDataPtr->m_activeNotifications[m_uniqueTriggerId].load(std::memory_order_relaxed);
}
return false;
}
void TriggerHandle::reset() noexcept
{
std::lock_guard<std::recursive_mutex> lock(m_mutex);
if (!isValid())
{
return;
}
// constructor ensured that resetCallback is valid
IOX_DISCARD_RESULT(m_resetCallback(m_uniqueTriggerId));
invalidate();
}
void TriggerHandle::invalidate() noexcept
{
std::lock_guard<std::recursive_mutex> lock(m_mutex);
m_conditionVariableDataPtr = nullptr;
m_resetCallback = cxx::MethodCallback<void, uint64_t>();
m_uniqueTriggerId = Trigger::INVALID_TRIGGER_ID;
}
ConditionVariableData* TriggerHandle::getConditionVariableData() noexcept
{
std::lock_guard<std::recursive_mutex> lock(m_mutex);
return m_conditionVariableDataPtr;
}
uint64_t TriggerHandle::getUniqueId() const noexcept
{
std::lock_guard<std::recursive_mutex> lock(m_mutex);
return m_uniqueTriggerId;
}
} // namespace popo
} // namespace iox
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