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/*
* Copyright 2005,2006 Fabrice Colin
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Library General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <pthread.h>
#include <iostream>
#ifdef USE_SSL
#include <openssl/crypto.h>
#endif
#include "DownloaderInterface.h"
using namespace std;
#ifdef USE_SSL
// OpenSSL multi-thread support, required by Curl
static pthread_mutex_t locksTable[CRYPTO_NUM_LOCKS];
// OpenSSL locking functiom
static void lockingCallback(int mode, int n, const char *file, int line)
{
int status = 0;
if (mode & CRYPTO_LOCK)
{
status = pthread_mutex_lock(&(locksTable[n]));
#ifdef DEBUG
if (status != 0)
{
cout << "lockingCallback: failed to lock mutex " << n << endl;
}
#endif
}
else
{
status = pthread_mutex_unlock(&(locksTable[n]));
#ifdef DEBUG
if (status != 0)
{
cout << "lockingCallback: failed to unlock mutex " << n << endl;
}
#endif
}
}
static unsigned long idCallback(void)
{
return (unsigned long)pthread_self();
}
#endif
/// Initialize downloaders.
void DownloaderInterface::initialize(void)
{
#ifdef USE_SSL
pthread_mutexattr_t mutexAttr;
pthread_mutexattr_init(&mutexAttr);
pthread_mutexattr_settype(&mutexAttr, PTHREAD_MUTEX_ERRORCHECK);
// Initialize the OpenSSL mutexes
for (unsigned int lockNum = 0; lockNum < CRYPTO_NUM_LOCKS; ++lockNum)
{
pthread_mutex_init(&(locksTable[lockNum]), &mutexAttr);
}
// Set the callbacks
CRYPTO_set_locking_callback(lockingCallback);
CRYPTO_set_id_callback(idCallback);
pthread_mutexattr_destroy(&mutexAttr);
#endif
}
/// Shutdown downloaders.
void DownloaderInterface::shutdown(void)
{
#ifdef USE_SSL
// Reset the OpenSSL callbacks
CRYPTO_set_id_callback(NULL);
CRYPTO_set_locking_callback(NULL);
// Free the mutexes
for (unsigned int lockNum = 0; lockNum < CRYPTO_NUM_LOCKS; ++lockNum)
{
pthread_mutex_destroy(&(locksTable[lockNum]));
}
#endif
}
DownloaderInterface::DownloaderInterface() :
m_timeout(60)
{
}
DownloaderInterface::~DownloaderInterface()
{
}
/// Sets a (name, value) setting; true if success.
bool DownloaderInterface::setSetting(const string &name, const string &value)
{
return false;
}
/// Sets timeout.
void DownloaderInterface::setTimeout(unsigned int milliseconds)
{
m_timeout = milliseconds;
}
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