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SuspendingState.cpp
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1/* -*- C++ -*-
2
3 This file implements the SuspendingState class.
4
5 $ Author: Mirko Boehm $
6 $ Copyright: (C) 2005-2013 Mirko Boehm $
7 $ Contact: mirko@kde.org
8 http://www.kde.org
9 http://creative-destruction.me $
10
11 This library is free software; you can redistribute it and/or
12 modify it under the terms of the GNU Library General Public
13 License as published by the Free Software Foundation; either
14 version 2 of the License, or (at your option) any later version.
15
16 This library is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 Library General Public License for more details.
20
21 You should have received a copy of the GNU Library General Public License
22 along with this library; see the file COPYING.LIB. If not, write to
23 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
24 Boston, MA 02110-1301, USA.
25
26 $Id: SuspendingState.cpp 30 2005-08-16 16:16:04Z mirko $
27*/
28
29#include "SuspendingState.h"
30
31#include "State.h"
32#include "WeaverImpl.h"
33#include "ThreadWeaver.h"
34
35using namespace ThreadWeaver;
36
37void SuspendingState::suspend()
38{
39 // this request is not handled in Suspending state (we are already
40 // suspending...)
41}
42
43void SuspendingState::resume()
44{
45 weaver()->setState ( WorkingHard );
46}
47
48void SuspendingState::activated()
49{
50 if ( weaver()->activeThreadCount() == 0 )
51 {
52 weaver()->setState( Suspended );
53 }
54}
55
56Job* SuspendingState::applyForWork ( Thread *th, Job* previous )
57{
58 if ( weaver()->activeThreadCount() == 0 )
59 {
60 weaver()->setState ( Suspended );
61 }
62 weaver()->waitForAvailableJob ( th );
63 return weaver()->applyForWork ( th, previous );
64}
65
66void SuspendingState::waitForAvailableJob ( Thread *th )
67{
68 weaver()->blockThreadUntilJobsAreBeingAssigned( th );
69}
70
71StateId SuspendingState::stateId() const
72{
73 return Suspending;
74}
State.h
SuspendingState.h
ThreadWeaver.h
WeaverImpl.h
ThreadWeaver::Job
A Job is a simple abstraction of an action that is to be executed in a thread context.
Definition: Job.h:66
ThreadWeaver::StateImplementation::weaver
WeaverImpl * weaver()
Definition: StateImplementation.cpp:35
ThreadWeaver::SuspendingState::waitForAvailableJob
virtual void waitForAvailableJob(Thread *th)
Wait (by suspending the calling thread) until a job becomes available.
Definition: SuspendingState.cpp:66
ThreadWeaver::SuspendingState::stateId
StateId stateId() const
reimpl
Definition: SuspendingState.cpp:71
ThreadWeaver::SuspendingState::suspend
virtual void suspend()
Suspend job processing.
Definition: SuspendingState.cpp:37
ThreadWeaver::SuspendingState::activated
void activated()
Overload.
Definition: SuspendingState.cpp:48
ThreadWeaver::SuspendingState::applyForWork
virtual Job * applyForWork(Thread *th, Job *previous)
Assign a job to an idle thread.
Definition: SuspendingState.cpp:56
ThreadWeaver::SuspendingState::resume
virtual void resume()
Resume job processing.
Definition: SuspendingState.cpp:43
ThreadWeaver::Thread
The class Thread is used to represent the worker threads in the weaver's inventory.
Definition: Thread.h:47
ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned
void blockThreadUntilJobsAreBeingAssigned(Thread *th)
Blocks the calling thread until some actor calls assignJobs.
Definition: WeaverImpl.cpp:364
ThreadWeaver::WeaverImpl::waitForAvailableJob
void waitForAvailableJob(Thread *th)
Wait for a job to become available.
Definition: WeaverImpl.cpp:359
ThreadWeaver::WeaverImpl::setState
void setState(StateId)
Set the object state.
Definition: WeaverImpl.cpp:124
ThreadWeaver::WeaverImpl::applyForWork
virtual Job * applyForWork(Thread *thread, Job *previous)
Assign a job to the calling thread.
Definition: WeaverImpl.cpp:354
ThreadWeaver
Definition: DebuggingAids.h:51
ThreadWeaver::StateId
StateId
All weaver objects maintain a state of operation which can be queried by the application.
Definition: State.h:48
ThreadWeaver::WorkingHard
@ WorkingHard
Jobs are being processed.
Definition: State.h:53
ThreadWeaver::Suspending
@ Suspending
Job processing is suspended, but some jobs which where already in progress are not finished yet.
Definition: State.h:56
ThreadWeaver::Suspended
@ Suspended
Job processing is suspended, and no jobs are being processed.
Definition: State.h:59
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