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/*
* ZeroTier One - Global Peer to Peer Ethernet
* Copyright (C) 2011-2015 ZeroTier Networks
*
* 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 3 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* --
*
* ZeroTier may be used and distributed under the terms of the GPLv3, which
* are available at: http://www.gnu.org/licenses/gpl-3.0.html
*
* If you would like to embed ZeroTier into a commercial application or
* redistribute it in a modified binary form, please contact ZeroTier Networks
* LLC. Start here: http://www.zerotier.com/
*/
#ifndef ZT_THREAD_HPP
#define ZT_THREAD_HPP
#include <stdexcept>
#include "Constants.hpp"
#ifdef __WINDOWS__
#include <WinSock2.h>
#include <Windows.h>
#include <string.h>
#include "Mutex.hpp"
namespace ZeroTier {
template<typename C>
static DWORD WINAPI ___zt_threadMain(LPVOID lpParam)
{
try {
((C *)lpParam)->threadMain();
} catch ( ... ) {}
return 0;
}
class Thread
{
public:
Thread()
throw()
{
_th = NULL;
_tid = 0;
}
template<typename C>
static inline Thread start(C *instance)
throw(std::runtime_error)
{
Thread t;
t._th = CreateThread(NULL,0,&___zt_threadMain<C>,(LPVOID)instance,0,&t._tid);
if (t._th == NULL)
throw std::runtime_error("CreateThread() failed");
return t;
}
static inline void join(const Thread &t)
{
if (t._th != NULL) {
for(;;) {
DWORD ec = STILL_ACTIVE;
GetExitCodeThread(t._th,&ec);
if (ec == STILL_ACTIVE)
WaitForSingleObject(t._th,1000);
else break;
}
}
}
static inline void sleep(unsigned long ms)
{
Sleep((DWORD)ms);
}
// Not available on *nix platforms
static inline void cancelIO(const Thread &t)
{
if (t._th != NULL)
CancelSynchronousIo(t._th);
}
inline operator bool() const throw() { return (_th != NULL); }
private:
HANDLE _th;
DWORD _tid;
};
} // namespace ZeroTier
#else
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <pthread.h>
#include <unistd.h>
namespace ZeroTier {
template<typename C>
static void *___zt_threadMain(void *instance)
{
try {
((C *)instance)->threadMain();
} catch ( ... ) {}
return (void *)0;
}
/**
* A thread identifier, and static methods to start and join threads
*/
class Thread
{
public:
Thread()
throw()
{
memset(&_tid,0,sizeof(_tid));
_started = false;
}
Thread(const Thread &t)
throw()
{
memcpy(&_tid,&(t._tid),sizeof(_tid));
_started = t._started;
}
inline Thread &operator=(const Thread &t)
throw()
{
memcpy(&_tid,&(t._tid),sizeof(_tid));
_started = t._started;
return *this;
}
/**
* Start a new thread
*
* @param instance Instance whose threadMain() method gets called by new thread
* @return Thread identifier
* @throws std::runtime_error Unable to create thread
* @tparam C Class containing threadMain()
*/
template<typename C>
static inline Thread start(C *instance)
throw(std::runtime_error)
{
Thread t;
t._started = true;
if (pthread_create(&t._tid,(const pthread_attr_t *)0,&___zt_threadMain<C>,instance))
throw std::runtime_error("pthread_create() failed, unable to create thread");
return t;
}
/**
* Join to a thread, waiting for it to terminate (does nothing on null Thread values)
*
* @param t Thread to join
*/
static inline void join(const Thread &t)
{
if (t._started)
pthread_join(t._tid,(void **)0);
}
/**
* Sleep the current thread
*
* @param ms Number of milliseconds to sleep
*/
static inline void sleep(unsigned long ms) { usleep(ms * 1000); }
inline operator bool() const throw() { return (_started); }
private:
pthread_t _tid;
volatile bool _started;
};
} // namespace ZeroTier
#endif // __WINDOWS__ / !__WINDOWS__
#endif
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