* Copyright 2018-2022, Andrew Lindesay <apl@lindesay.co.nz>.
* All rights reserved. Distributed under the terms of the MIT License.
*/
#ifndef ABSTRACT_PROCESS_NODE_H
#define ABSTRACT_PROCESS_NODE_H
#include <AutoLocker.h>
#include <Locker.h>
#include <ObjectList.h>
#include <OS.h>
class AbstractProcess;
class ProcessListener;
purpose of the class is to hold a process and also any dependent processes
of this one. This effectively creates a dependency tree of processes.
*/
class AbstractProcessNode {
public:
AbstractProcessNode(AbstractProcess* process);
virtual ~AbstractProcessNode();
AbstractProcess* Process() const;
virtual status_t Start() = 0;
virtual status_t RequestStop() = 0;
virtual bool IsRunning();
void AddPredecessor(AbstractProcessNode* node);
int32 CountPredecessors() const;
AbstractProcessNode*
PredecessorAt(int32 index) const;
bool AllPredecessorsComplete() const;
int32 CountSuccessors() const;
AbstractProcessNode*
SuccessorAt(int32 index) const;
virtual void SetListener(ProcessListener* listener);
protected:
status_t _SpinUntilProcessState(
uint32 desiredStatesMask,
int32 timeoutSeconds);
protected:
BLocker fLock;
ProcessListener* fListener;
private:
void _AddSuccessor(AbstractProcessNode* node);
AbstractProcess* fProcess;
BObjectList<AbstractProcessNode>
fPredecessorNodes;
BObjectList<AbstractProcessNode>
fSuccessorNodes;
};
#endif
