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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you 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 .
+ */
+
+#ifndef INCLUDED_VCL_TASK_HXX
+#define INCLUDED_VCL_TASK_HXX
+
+#include <vcl/dllapi.h>
+
+struct ImplSchedulerData;
+
+enum class TaskPriority
+{
+ HIGHEST, ///< These events should run very fast!
+ DEFAULT, ///< Default priority used, e.g. the default timer priority
+ HIGH_IDLE, ///< Important idle events to be run before processing drawing events
+ RESIZE, ///< Resize runs before repaint, so we won't paint twice
+ REPAINT, ///< All repaint events should go in here
+ POST_PAINT, ///< Everything running directly after painting
+ DEFAULT_IDLE, ///< Default idle priority
+ LOWEST ///< Low, very idle cleanup tasks
+};
+
+#define PRIO_COUNT (static_cast<int>(TaskPriority::LOWEST) + 1)
+
+class VCL_DLLPUBLIC Task
+{
+ friend class Scheduler;
+ friend struct ImplSchedulerData;
+
+ ImplSchedulerData *mpSchedulerData; ///< Pointer to the element in scheduler list
+ const char *mpDebugName; ///< Useful for debugging
+ TaskPriority mePriority; ///< Task priority
+ bool mbActive; ///< Currently in the scheduler
+ bool mbStatic; ///< Is a static object
+
+protected:
+ static void StartTimer( sal_uInt64 nMS );
+
+ const ImplSchedulerData* GetSchedulerData() const { return mpSchedulerData; }
+
+ virtual void SetDeletionFlags();
+
+ /**
+ * How long (in MS) until the Task is ready to be dispatched?
+ *
+ * Simply return Scheduler::ImmediateTimeoutMs if you're ready, like an
+ * Idle. If you have to return Scheduler::InfiniteTimeoutMs, you probably
+ * need another mechanism to wake up the Scheduler or rely on other
+ * Tasks to be scheduled, or simply use a polling Timer.
+ *
+ * @param nTimeNow the current time
+ * @return the sleep time of the Task to become ready
+ */
+ virtual sal_uInt64 UpdateMinPeriod( sal_uInt64 nTimeNow ) const = 0;
+
+public:
+ Task( const char *pDebugName );
+ Task( const Task& rTask );
+ virtual ~Task() COVERITY_NOEXCEPT_FALSE;
+ Task& operator=( const Task& rTask );
+
+ void SetPriority(TaskPriority ePriority);
+ TaskPriority GetPriority() const { return mePriority; }
+
+ void SetDebugName( const char *pDebugName ) { mpDebugName = pDebugName; }
+ const char *GetDebugName() const { return mpDebugName; }
+
+ // Call handler
+ virtual void Invoke() = 0;
+
+ virtual void Start();
+ void Stop();
+
+ bool IsActive() const { return mbActive; }
+
+ /**
+ * This function must be called for static tasks, so the Task destructor
+ * ignores the SchedulerMutex, as it may not be available anymore.
+ * The cleanup is still correct, as it has already happened in
+ * DeInitScheduler call well before the static destructor calls.
+ */
+ void SetStatic() { mbStatic = true; }
+ bool IsStatic() const { return mbStatic; }
+};
+
+#endif // INCLUDED_VCL_TASK_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */