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/*
* SyncedBlockStream.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 "SyncedBlockStream.h"
using namespace dash::helpers;
SyncedBlockStream::SyncedBlockStream () :
eos (false)
{
InitializeConditionVariable (&this->full);
InitializeCriticalSection (&this->monitorMutex);
}
SyncedBlockStream::~SyncedBlockStream ()
{
DeleteConditionVariable(&this->full);
DeleteCriticalSection(&this->monitorMutex);
}
void SyncedBlockStream::PopAndDeleteFront ()
{
EnterCriticalSection(&this->monitorMutex);
BlockStream::PopAndDeleteFront();
LeaveCriticalSection(&this->monitorMutex);
}
void SyncedBlockStream::PushBack (block_t *block)
{
EnterCriticalSection(&this->monitorMutex);
BlockStream::PushBack(block);
WakeAllConditionVariable(&this->full);
LeaveCriticalSection(&this->monitorMutex);
}
void SyncedBlockStream::PushFront (block_t *block)
{
EnterCriticalSection(&this->monitorMutex);
BlockStream::PushFront(block);
WakeAllConditionVariable(&this->full);
LeaveCriticalSection(&this->monitorMutex);
}
const block_t* SyncedBlockStream::GetBytes (uint32_t len)
{
EnterCriticalSection(&this->monitorMutex);
while(this->length == 0 && !this->eos)
SleepConditionVariableCS(&this->full, &this->monitorMutex, INFINITE);
if(this->length == 0)
{
LeaveCriticalSection(&this->monitorMutex);
return NULL;
}
const block_t* block = BlockStream::GetBytes(len);
LeaveCriticalSection(&this->monitorMutex);
return block;
}
size_t SyncedBlockStream::GetBytes (uint8_t *data, size_t len)
{
EnterCriticalSection(&this->monitorMutex);
while(this->length == 0 && !this->eos)
SleepConditionVariableCS(&this->full, &this->monitorMutex, INFINITE);
if(this->length == 0)
{
LeaveCriticalSection(&this->monitorMutex);
return 0;
}
size_t ret = BlockStream::GetBytes(data, len);
LeaveCriticalSection(&this->monitorMutex);
return ret;
}
size_t SyncedBlockStream::PeekBytes (uint8_t *data, size_t len)
{
EnterCriticalSection(&this->monitorMutex);
while(this->length == 0 && !this->eos)
SleepConditionVariableCS(&this->full, &this->monitorMutex, INFINITE);
if(this->length == 0)
{
LeaveCriticalSection(&this->monitorMutex);
return 0;
}
size_t ret = BlockStream::PeekBytes(data, len);
LeaveCriticalSection(&this->monitorMutex);
return ret;
}
size_t SyncedBlockStream::PeekBytes (uint8_t *data, size_t len, size_t offset)
{
EnterCriticalSection(&this->monitorMutex);
while((this->length == 0 || offset >= this->length) && !this->eos)
SleepConditionVariableCS(&this->full, &this->monitorMutex, INFINITE);
if(this->length == 0 || offset >= this->length)
{
LeaveCriticalSection(&this->monitorMutex);
return 0;
}
size_t ret = BlockStream::PeekBytes(data, len, offset);
LeaveCriticalSection(&this->monitorMutex);
return ret;
}
uint64_t SyncedBlockStream::Length () const
{
EnterCriticalSection(&this->monitorMutex);
uint64_t len = BlockStream::Length();
LeaveCriticalSection(&this->monitorMutex);
return len;
}
const block_t* SyncedBlockStream::GetFront ()
{
EnterCriticalSection(&this->monitorMutex);
while(this->length == 0 && !this->eos)
SleepConditionVariableCS(&this->full, &this->monitorMutex, INFINITE);
if(this->length == 0)
{
LeaveCriticalSection(&this->monitorMutex);
return NULL;
}
const block_t* block = BlockStream::GetFront();
LeaveCriticalSection(&this->monitorMutex);
return block;
}
const block_t* SyncedBlockStream::Front () const
{
EnterCriticalSection(&this->monitorMutex);
while(this->length == 0 && !this->eos)
SleepConditionVariableCS(&this->full, &this->monitorMutex, INFINITE);
if(this->length == 0)
{
LeaveCriticalSection(&this->monitorMutex);
return NULL;
}
const block_t* block = BlockStream::Front();
LeaveCriticalSection(&this->monitorMutex);
return block;
}
uint8_t SyncedBlockStream::ByteAt (uint64_t position) const
{
EnterCriticalSection(&this->monitorMutex);
while(this->length < position && !this->eos)
SleepConditionVariableCS(&this->full, &this->monitorMutex, INFINITE);
if(this->length < position)
{
LeaveCriticalSection(&this->monitorMutex);
return 0;
}
uint8_t ret = BlockStream::ByteAt(position);
LeaveCriticalSection(&this->monitorMutex);
return ret;
}
const block_t* SyncedBlockStream::ToBlock ()
{
EnterCriticalSection(&this->monitorMutex);
while(this->length == 0 && !this->eos)
SleepConditionVariableCS(&this->full, &this->monitorMutex, INFINITE);
if(this->length == 0)
{
LeaveCriticalSection(&this->monitorMutex);
return NULL;
}
const block_t* block = BlockStream::ToBlock();
LeaveCriticalSection(&this->monitorMutex);
return block;
}
void SyncedBlockStream::Clear ()
{
EnterCriticalSection(&this->monitorMutex);
BlockStream::Clear();
LeaveCriticalSection(&this->monitorMutex);
}
void SyncedBlockStream::EraseFront (uint64_t len)
{
EnterCriticalSection(&this->monitorMutex);
BlockStream::EraseFront(len);
LeaveCriticalSection(&this->monitorMutex);
}
BlockStream* SyncedBlockStream::GetBlocks (uint64_t len)
{
EnterCriticalSection(&this->monitorMutex);
while(this->length == 0 && !this->eos)
SleepConditionVariableCS(&this->full, &this->monitorMutex, INFINITE);
if(this->length == 0)
{
LeaveCriticalSection(&this->monitorMutex);
return NULL;
}
BlockStream *stream = BlockStream::GetBlocks(len);
LeaveCriticalSection(&this->monitorMutex);
return stream;
}
void SyncedBlockStream::SetEOS (bool value)
{
EnterCriticalSection(&this->monitorMutex);
this->eos = value;
WakeAllConditionVariable(&this->full);
LeaveCriticalSection(&this->monitorMutex);
}
|
