Drizzled Public API Documentation

signal_handler.h
1 /* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
2  * vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
3  *
4  * Copyright (C) 2008 Sun Microsystems, Inc.
5  * Copyright (C) 2010 Monty Taylor
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; version 2 of the License.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #pragma once
22 
23 #include <signal.h>
24 
25 #include <cstdlib>
26 #include <cassert>
27 static bool volatile signal_thread_in_use= false;
28 extern "C" void drizzled_print_signal_warning(int sig);
29 extern "C" void drizzled_handle_segfault(int sig);
30 extern "C" void drizzled_end_thread_signal(int sig);
31 extern "C" void drizzled_sigint_handler(int sig);
32 
33 /*
34  posix sigaction() based signal handler implementation
35  On some systems, such as Mac OS X, sigset() results in flags
36  such as SA_RESTART being set, and we want to make sure that no such
37  flags are set.
38 */
39 static inline void ignore_signal(int sig)
40 {
41  /* Wow. There is a function sigaction which takes a pointer to a
42  struct sigaction. */
43  struct sigaction l_s;
44  sigset_t l_set;
45  sigemptyset(&l_set);
46 
47  assert(sig != 0);
48  l_s.sa_handler= SIG_IGN;
49  l_s.sa_mask= l_set;
50  l_s.sa_flags= 0;
51  int l_rc= sigaction(sig, &l_s, NULL);
52  assert(l_rc == 0);
53 }
54