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/* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Data Differential Utility library
*
* Copyright (C) 2012 Data Differential, http://datadifferential.com/
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
*
* * The names of its contributors may not be used to endorse or
* promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#pragma once
#include <pthread.h>
#include <semaphore.h>
#ifdef HAVE_SIGNAL_H
#include <signal.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
typedef void (signal_callback_fn)();
#ifdef __cplusplus
}
#endif
namespace datadifferential {
namespace util {
enum shutdown_t {
SHUTDOWN_RUNNING,
SHUTDOWN_GRACEFUL,
SHUTDOWN_FORCED
};
class SignalThread {
bool _exit_on_signal;
sigset_t set;
sem_t lock;
uint64_t magic_memory;
volatile shutdown_t __shutdown;
pthread_mutex_t shutdown_mutex;
public:
SignalThread(bool exit_on_signal_arg= false);
void test();
void post();
bool setup();
bool exit_on_signal()
{
return _exit_on_signal;
}
int wait(int& sig)
{
return sigwait(&set, &sig);
}
~SignalThread();
void set_shutdown(shutdown_t arg);
bool is_shutdown();
shutdown_t get_shutdown();
void sighup();
void sighup(signal_callback_fn* arg);
private:
pthread_t thread;
signal_callback_fn* _sighup;
};
} /* namespace util */
} /* namespace datadifferential */
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