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/*
* 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 <chrono>
#include <mutex>
#include <condition_variable>
#include <pthread.h>
#include <iostream>
#include <cassert>
#include <unistd.h>
#include "config.h"
#include "Timeval.h"
class Mutex;
/**@defgroup C++ wrappers for pthread mechanisms. */
//@{
/** A class for recursive mutexes. */
class Mutex {
std::recursive_mutex m;
public:
void lock() {
m.lock();
}
bool trylock() {
return m.try_lock();
}
void unlock() {
m.unlock();
}
friend class Signal;
};
class ScopedLock {
Mutex &mMutex;
public:
ScopedLock(Mutex &wMutex) : mMutex(wMutex) {
mMutex.lock();
}
~ScopedLock() {
mMutex.unlock();
}
};
/** A C++ interthread signal. */
class Signal {
/* any, because for some reason our mutex is recursive... */
std::condition_variable_any mSignal;
public:
void wait(Mutex &wMutex, unsigned timeout) {
mSignal.wait_for(wMutex.m, std::chrono::milliseconds(timeout));
}
void wait(Mutex &wMutex) {
mSignal.wait(wMutex.m);
}
void signal() {
mSignal.notify_one();
}
void broadcast() {
mSignal.notify_all();
}
};
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
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