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/*
* DownloadStateManager.cpp
*****************************************************************************
* Copyright (C) 2012, bitmovin Softwareentwicklung OG, All Rights Reserved
*
* Email: libdash-dev@vicky.bitmovin.net
*
* This source code and its use and distribution, is subject to the terms
* and conditions of the applicable license agreement.
*****************************************************************************/
#include "DownloadStateManager.h"
using namespace dash::network;
DownloadStateManager::DownloadStateManager () :
state (NOT_STARTED)
{
InitializeConditionVariable (&this->stateChanged);
InitializeCriticalSection (&this->stateLock);
}
DownloadStateManager::~DownloadStateManager ()
{
DeleteConditionVariable (&this->stateChanged);
DeleteCriticalSection (&this->stateLock);
}
DownloadState DownloadStateManager::State () const
{
EnterCriticalSection(&this->stateLock);
DownloadState ret = this->state;
LeaveCriticalSection(&this->stateLock);
return ret;
}
void DownloadStateManager::State (DownloadState state)
{
EnterCriticalSection(&this->stateLock);
this->state = state;
this->Notify();
WakeAllConditionVariable(&this->stateChanged);
LeaveCriticalSection(&this->stateLock);
}
void DownloadStateManager::WaitState (DownloadState state) const
{
EnterCriticalSection(&this->stateLock);
while(this->state != state)
SleepConditionVariableCS(&this->stateChanged, &this->stateLock, INFINITE);
LeaveCriticalSection(&this->stateLock);
}
void DownloadStateManager::CheckAndWait (DownloadState check, DownloadState wait) const
{
EnterCriticalSection(&this->stateLock);
if(this->state == check)
while(this->state != wait)
SleepConditionVariableCS(&this->stateChanged, &this->stateLock, INFINITE);
LeaveCriticalSection(&this->stateLock);
}
void DownloadStateManager::Attach (IDownloadObserver *observer)
{
EnterCriticalSection(&this->stateLock);
this->observers.push_back(observer);
LeaveCriticalSection(&this->stateLock);
}
void DownloadStateManager::Detach (IDownloadObserver *observer)
{
EnterCriticalSection(&this->stateLock);
uint32_t pos = -1;
for(size_t i = 0; i < this->observers.size(); i++)
if(this->observers.at(i) == observer)
pos = i;
if(pos != -1)
this->observers.erase(this->observers.begin() + pos);
LeaveCriticalSection(&this->stateLock);
}
void DownloadStateManager::Notify ()
{
for(size_t i = 0; i < this->observers.size(); i++)
this->observers.at(i)->OnDownloadStateChanged(this->state);
}
void DownloadStateManager::CheckAndSet (DownloadState check, DownloadState set)
{
EnterCriticalSection(&this->stateLock);
if(this->state == check)
this->state = set;
LeaveCriticalSection(&this->stateLock);
}
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