Osmocom GSM/GPRS/EGPRS transceiver, originally forked from OpenBTS transceiver. For building SDR based GSM BTS with osmo-bts-trx.
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 
 

219 lines
4.9 KiB

/*
* Copyright 2008, 2011 Free Software Foundation, Inc.
*
* SPDX-License-Identifier: AGPL-3.0+
*
* This software is distributed under the terms of the GNU Affero Public License.
* See the COPYING file in the main directory for details.
*
* This use of this software may be subject to additional restrictions.
* See the LEGAL file in the main directory for details.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef THREADS_H
#define THREADS_H
#include "config.h"
#include <pthread.h>
#include <iostream>
#include <assert.h>
#include <unistd.h>
class Mutex;
/**@name Multithreaded access for standard streams. */
//@{
/**@name Functions for gStreamLock. */
//@{
extern Mutex gStreamLock; ///< global lock for cout and cerr
void lockCerr(); ///< call prior to writing cerr
void unlockCerr(); ///< call after writing cerr
void lockCout(); ///< call prior to writing cout
void unlockCout(); ///< call after writing cout
//@}
/**@name Macros for standard messages. */
//@{
#define COUT(text) { lockCout(); std::cout << text; unlockCout(); }
#define CERR(text) { lockCerr(); std::cerr << __FILE__ << ":" << __LINE__ << ": " << text; unlockCerr(); }
#ifdef NDEBUG
#define DCOUT(text) {}
#define OBJDCOUT(text) {}
#else
#define DCOUT(text) { COUT(__FILE__ << ":" << __LINE__ << " " << text); }
#define OBJDCOUT(text) { DCOUT(this << " " << text); }
#endif
//@}
//@}
/**@defgroup C++ wrappers for pthread mechanisms. */
//@{
/** A class for recursive mutexes based on pthread_mutex. */
class Mutex {
private:
pthread_mutex_t mMutex;
pthread_mutexattr_t mAttribs;
public:
Mutex();
~Mutex();
void lock() { pthread_mutex_lock(&mMutex); }
bool trylock() { return pthread_mutex_trylock(&mMutex)==0; }
void unlock() { pthread_mutex_unlock(&mMutex); }
friend class Signal;
};
class ScopedLock {
private:
Mutex& mMutex;
public:
ScopedLock(Mutex& wMutex) :mMutex(wMutex) { mMutex.lock(); }
~ScopedLock() { mMutex.unlock(); }
};
/** A C++ interthread signal based on pthread condition variables. */
class Signal {
private:
mutable pthread_cond_t mSignal;
public:
Signal() { int s = pthread_cond_init(&mSignal,NULL); assert(!s); }
~Signal() { pthread_cond_destroy(&mSignal); }
/**
Block for the signal up to the cancellation timeout.
Under Linux, spurious returns are possible.
*/
void wait(Mutex& wMutex, unsigned timeout) const;
/**
Block for the signal.
Under Linux, spurious returns are possible.
*/
void wait(Mutex& wMutex) const
{ pthread_cond_wait(&mSignal,&wMutex.mMutex); }
void signal() { pthread_cond_signal(&mSignal); }
void broadcast() { pthread_cond_broadcast(&mSignal); }
};
#define START_THREAD(thread,function,argument) \
thread.start((void *(*)(void*))function, (void*)argument);
void set_selfthread_name(const char *name);
void thread_enable_cancel(bool cancel);
/** A C++ wrapper for pthread threads. */
class Thread {
private:
pthread_t mThread;
pthread_attr_t mAttrib;
// FIXME -- Can this be reduced now?
size_t mStackSize;
public:
/** Create a thread in a non-running state. */
Thread(size_t wStackSize = 0):mThread((pthread_t)0) {
pthread_attr_init(&mAttrib); // (pat) moved this here.
mStackSize=wStackSize;
}
/**
Destroy the Thread.
It should be stopped and joined.
*/
// (pat) If the Thread is destroyed without being started, then mAttrib is undefined. Oops.
~Thread() { pthread_attr_destroy(&mAttrib); }
/** Start the thread on a task. */
void start(void *(*task)(void*), void *arg);
/** Join a thread that will stop on its own. */
void join() {
if (mThread) {
int s = pthread_join(mThread, NULL);
assert(!s);
}
}
/** Send cancellation to thread */
void cancel() { pthread_cancel(mThread); }
};
#ifdef HAVE_ATOMIC_OPS
#define osmo_trx_sync_fetch_and_and(ptr, value) __sync_fetch_and_and((ptr), (value))
#define osmo_trx_sync_or_and_fetch(ptr, value) __sync_or_and_fetch((ptr), (value))
#else
extern pthread_mutex_t atomic_ops_mutex;
static inline int osmo_trx_sync_fetch_and_and(int *ptr, int value)
{
pthread_mutex_lock(&atomic_ops_mutex);
int tmp = *ptr;
*ptr &= value;
pthread_mutex_unlock(&atomic_ops_mutex);
return tmp;
}
static inline int osmo_trx_sync_or_and_fetch(int *ptr, int value)
{
int tmp;
pthread_mutex_lock(&atomic_ops_mutex);
*ptr |= value;
tmp = *ptr;
pthread_mutex_unlock(&atomic_ops_mutex);
return tmp;
}
#endif
#endif
// vim: ts=4 sw=4