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/*
* libjingle
* Copyright 2004--2006, Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef TALK_BASE_TASKRUNNER_H__
#define TALK_BASE_TASKRUNNER_H__
#include <vector>
#include "talk/base/sigslot.h"
#include "talk/base/task.h"
namespace talk_base {
class Task;
const int64 kSecToMsec = 1000;
const int64 kMsecTo100ns = 10000;
const int64 kSecTo100ns = kSecToMsec * kMsecTo100ns;
class TaskRunner : public Task, public sigslot::has_slots<> {
public:
TaskRunner();
virtual ~TaskRunner();
virtual void WakeTasks() = 0;
// This method returns the current time in 100ns units since 1/1/1601. This
// Is the GetSystemTimeAsFileTime method on windows.
virtual int64 CurrentTime() = 0 ;
void StartTask(Task *task);
void RunTasks();
void PollTasks();
void UpdateTaskTimeout(Task *task);
// dummy state machine - never run.
virtual int ProcessStart() { return STATE_DONE; }
bool HasTimeoutTask() {
return next_timeout_task_ != NULL;
}
bool HasPendingTimeoutTask() {
return next_timeout_task_ != NULL &&
next_timeout_task_->TimedOut();
}
private:
std::vector<Task *> tasks_;
Task *next_timeout_task_;
bool tasks_running_;
void RecalcNextTimeout(Task *exclude_task);
};
} // namespace talk_base
#endif // TASK_BASE_TASKRUNNER_H__
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