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/**
* Copyright (c) 2015, Suresh Sundriyal
*
* All rights reserved.
*
* 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.
* * Neither the name of the copyright holder nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*/
#ifndef timer_hh
#define timer_hh
#include <exception>
#include <errno.h>
#include <signal.h>
#include <sys/time.h>
#include <sys/types.h>
// Linux and BSD seem to name the function pointer to signal handler
// differently. Linux names it 'sighandler_t' and BSD names it 'sig_t'. Instead
// of depending on configure scripts to find out the type name, typedef it right
// here.
typedef void (*sighandler_t_)(int);
namespace timer {
class error : public std::exception {
public:
error(int err);
int e_err;
};
class interrupt_timer {
public:
interrupt_timer(struct timeval, sighandler_t_);
int arm_timer();
void disarm_timer();
bool is_armed();
~interrupt_timer();
private:
sighandler_t_ new_handler;
struct sigaction old_handler;
struct itimerval new_val, old_val;
bool armed;
};
} // namespace timer
#endif
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