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102 lines
2.4 KiB
102 lines
2.4 KiB
// SPDX-License-Identifier: BSD-3-Clause
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// Copyright (c) 2014-2021, The Monero Project.
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#include "scheduler.h"
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FutureScheduler::FutureScheduler(QObject *parent)
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: QObject(parent), Alive(0), Stopping(false)
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{
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static std::once_flag once;
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std::call_once(once, []() {
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QThreadPool::globalInstance()->setMaxThreadCount(4);
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});
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}
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FutureScheduler::~FutureScheduler()
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{
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shutdownWaitForFinished();
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}
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void FutureScheduler::shutdownWaitForFinished() noexcept
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{
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QMutexLocker locker(&Mutex);
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Stopping = true;
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while (Alive > 0)
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{
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Condition.wait(&Mutex);
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}
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}
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QPair<bool, QFuture<void>> FutureScheduler::run(std::function<void()> function) noexcept
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{
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return execute<void>([this, function](QFutureWatcher<void> *) {
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return QtConcurrent::run([this, function] {
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try
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{
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function();
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}
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catch (const std::exception &exception)
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{
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qWarning() << "Exception thrown from async function: " << exception.what();
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}
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done();
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});
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});
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}
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//QPair<bool, QFuture<QJSValueList>> FutureScheduler::run(std::function<QJSValueList()> function, const QJSValue &callback)
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//{
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// if (!callback.isCallable())
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// {
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// throw std::runtime_error("js callback must be callable");
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// }
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// return execute<QJSValueList>([this, function, callback](QFutureWatcher<QJSValueList> *watcher) {
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// connect(watcher, &QFutureWatcher<QJSValueList>::finished, [watcher, callback] {
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// QJSValue(callback).call(watcher->future().result());
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// });
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// return QtConcurrent::run([this, function] {
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// QJSValueList result;
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// try
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// {
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// result = function();
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// }
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// catch (const std::exception &exception)
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// {
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// qWarning() << "Exception thrown from async function: " << exception.what();
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// }
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// done();
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// return result;
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// });
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// });
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//}
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bool FutureScheduler::stopping() const noexcept
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{
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return Stopping;
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}
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bool FutureScheduler::add() noexcept
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{
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QMutexLocker locker(&Mutex);
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if (Stopping)
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{
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return false;
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}
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++Alive;
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return true;
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}
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void FutureScheduler::done() noexcept
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{
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{
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QMutexLocker locker(&Mutex);
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--Alive;
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}
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Condition.wakeAll();
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}
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