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1 | // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- |
2 | // vim: ts=8 sw=2 smarttab | |
3 | /* | |
4 | * Ceph - scalable distributed file system | |
5 | * | |
6 | * Copyright (C) 2011 New Dream Network | |
7 | * | |
8 | * This is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License version 2.1, as published by the Free Software | |
11 | * Foundation. See file COPYING. | |
12 | * | |
13 | */ | |
14 | ||
15 | #ifndef CEPH_COMMON_SIGNAL_H | |
16 | #define CEPH_COMMON_SIGNAL_H | |
17 | ||
18 | #include <signal.h> | |
19 | #include <string> | |
20 | ||
21 | // Returns a string showing the set of blocked signals for the calling thread. | |
22 | // Other threads may have a different set (this is per-thread thing). | |
23 | extern std::string signal_mask_to_str(); | |
24 | ||
25 | // Block a list of signals. If siglist == NULL, blocks all signals. | |
26 | // If not, the list is terminated with a 0 element. | |
27 | // | |
28 | // On success, stores the old set of blocked signals in | |
29 | // old_sigset. On failure, stores an invalid set of blocked signals in | |
30 | // old_sigset. | |
31 | extern void block_signals(const int *siglist, sigset_t *old_sigset); | |
32 | ||
33 | // Restore the set of blocked signals. Will not restore an invalid set of | |
34 | // blocked signals. | |
35 | extern void restore_sigset(const sigset_t *old_sigset); | |
36 | ||
37 | // Unblock all signals. On success, stores the old set of blocked signals in | |
38 | // old_sigset. On failure, stores an invalid set of blocked signals in | |
39 | // old_sigset. | |
40 | extern void unblock_all_signals(sigset_t *old_sigset); | |
41 | ||
42 | #endif |