/*************************************************************************************
This file is a part of CrashRpt library.
Copyright (c) 2003, Michael Carruth
All rights reserved.
Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
* 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.
* Neither the name of the author nor the names of its contributors
may be used to endorse or promote products derived from this software without
specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER OR CONTRIBUTORS 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.
***************************************************************************************/
#include "stdafx.h"
#include "AssyncNotification.h"
AssyncNotification::AssyncNotification()
{
// Init variables
m_hCompletionEvent = CreateEvent(0, FALSE, FALSE, 0);
m_hCancelEvent = CreateEvent(0, FALSE, FALSE, 0);
m_hFeedbackEvent = CreateEvent(0, FALSE, FALSE, 0);
Reset();
}
void AssyncNotification::Reset()
{
// Reset the event
m_cs.Lock(); // Acquire lock
m_nCompletionStatus = -1;
m_nPercentCompleted = 0;
m_statusLog.clear();
ResetEvent(m_hCancelEvent);
ResetEvent(m_hCompletionEvent);
ResetEvent(m_hFeedbackEvent);
m_cs.Unlock(); // Free lock
}
void AssyncNotification::SetProgress(CString sStatusMsg, int percentCompleted, bool bRelative)
{
m_cs.Lock(); // Acquire lock
m_statusLog.push_back(sStatusMsg);
if(bRelative) // Update progress relatively to its previous value
{
m_nPercentCompleted += percentCompleted;
if(m_nPercentCompleted>100)
m_nPercentCompleted = 100;
}
else // Update progress relatively to zero
{
m_nPercentCompleted = percentCompleted;
}
m_cs.Unlock(); // Free lock
}
void AssyncNotification::SetProgress(int percentCompleted, bool bRelative)
{
m_cs.Lock(); // Acquire lock
if(bRelative) // Update progress relatively to its previous value
{
m_nPercentCompleted += percentCompleted;
if(m_nPercentCompleted>100)
m_nPercentCompleted = 100;
}
else // Update progress relatively to zero
{
m_nPercentCompleted = percentCompleted;
}
m_cs.Unlock(); // Free lock
}
void AssyncNotification::GetProgress(int& nProgressPct, std::vector<CString>& msg_log)
{
msg_log.clear(); // Init message log (clear it)
m_cs.Lock(); // Acquire lock
nProgressPct = m_nPercentCompleted;
msg_log = m_statusLog;
m_statusLog.clear();
m_cs.Unlock(); // Free lock
}
void AssyncNotification::SetCompleted(int nCompletionStatus)
{
// Notifies about assynchronious operation completion
m_cs.Lock(); // Acquire lock
m_nCompletionStatus = nCompletionStatus;
m_cs.Unlock(); // Free lock
SetEvent(m_hCompletionEvent); // Set event
}
int AssyncNotification::WaitForCompletion()
{
// Blocks until assynchronous operation is completed
WaitForSingleObject(m_hCompletionEvent, INFINITE);
// Get completion status
int status = -1;
m_cs.Lock(); // Acquire lock
status = m_nCompletionStatus;
m_cs.Unlock(); // Free lock
return status;
}
void AssyncNotification::Cancel()
{
// Cansels the assync operation
SetProgress(_T("[cancelled_by_user]"), 0);
SetEvent(m_hCancelEvent);
}
bool AssyncNotification::IsCancelled()
{
// Determines if the assync operation is cancelled or not
DWORD dwWaitResult = WaitForSingleObject(m_hCancelEvent, 0);
if(dwWaitResult==WAIT_OBJECT_0)
{
SetEvent(m_hCancelEvent);
return true;
}
return false;
}
void AssyncNotification::WaitForFeedback(int &code)
{
// Waits until the main thread's signal
ResetEvent(m_hFeedbackEvent);
WaitForSingleObject(m_hFeedbackEvent, INFINITE);
m_cs.Lock();
code = m_nCompletionStatus;
m_cs.Unlock();
}
void AssyncNotification::FeedbackReady(int code)
{
// Sends signal to the waiting thread
m_cs.Lock();
m_nCompletionStatus = code;
m_cs.Unlock();
SetEvent(m_hFeedbackEvent);
}