BadVPN – Rev 1
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/**
* @file BSignal.h
* @author Ambroz Bizjak <ambrop7@gmail.com>
*
* @section LICENSE
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name of the author 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 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 AUTHOR 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.
*
* @section DESCRIPTION
*
* A global object for catching program termination requests.
*/
#ifndef BADVPN_SYSTEM_BSIGNAL_H
#define BADVPN_SYSTEM_BSIGNAL_H
#include <misc/debug.h>
#include <system/BReactor.h>
typedef void (*BSignal_handler) (void *user);
/**
* Initializes signal handling.
* The object is created in not capturing state.
* {@link BLog_Init} must have been done.
*
* WARNING: make sure this won't interfere with other components:
* - On Linux, this uses {@link BUnixSignal} to catch SIGTERM, SIGINT
* and SIGHUP.
* - on Windows, this sets up a handler with SetConsoleCtrlHandler.
*
* @param reactor {@link BReactor} from which the handler will be called
* @param handler callback function invoked from the reactor
* @param user value passed to callback function
* @return 1 on success, 0 on failure
*/
int BSignal_Init (BReactor *reactor, BSignal_handler handler, void *user) WARN_UNUSED;
/**
* Finishes signal handling.
* {@link BSignal_Init} must not be called again.
*/
void BSignal_Finish (void);
#endif