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1 | ///////////////////////////////////////////////////////////////////////////// | |
2 | // Name: wx/unix/appunix.cpp | |
3 | // Purpose: wxAppConsole with wxMainLoop implementation | |
4 | // Author: Lukasz Michalski | |
5 | // Created: 28/01/2005 | |
6 | // RCS-ID: $Id$ | |
7 | // Copyright: (c) Lukasz Michalski | |
8 | // Licence: wxWindows licence | |
9 | ///////////////////////////////////////////////////////////////////////////// | |
10 | ||
11 | #include "wx/app.h" | |
12 | #include "wx/log.h" | |
13 | #include "wx/evtloop.h" | |
14 | ||
15 | #include <signal.h> | |
16 | #include <unistd.h> | |
17 | ||
18 | // use unusual names for arg[cv] to avoid clashes with wxApp members with the | |
19 | // same names | |
20 | bool wxAppConsole::Initialize(int& argc_, wxChar** argv_) | |
21 | { | |
22 | if ( !wxAppConsoleBase::Initialize(argc_, argv_) ) | |
23 | return false; | |
24 | ||
25 | sigemptyset(&m_signalsCaught); | |
26 | ||
27 | return true; | |
28 | } | |
29 | ||
30 | void wxAppConsole::HandleSignal(int signal) | |
31 | { | |
32 | wxAppConsole * const app = wxTheApp; | |
33 | if ( !app ) | |
34 | return; | |
35 | ||
36 | sigaddset(&(app->m_signalsCaught), signal); | |
37 | app->WakeUpIdle(); | |
38 | } | |
39 | ||
40 | void wxAppConsole::CheckSignal() | |
41 | { | |
42 | for ( SignalHandlerHash::iterator it = m_signalHandlerHash.begin(); | |
43 | it != m_signalHandlerHash.end(); | |
44 | ++it ) | |
45 | { | |
46 | int sig = it->first; | |
47 | if ( sigismember(&m_signalsCaught, sig) ) | |
48 | { | |
49 | sigdelset(&m_signalsCaught, sig); | |
50 | (it->second)(sig); | |
51 | } | |
52 | } | |
53 | } | |
54 | ||
55 | // the type of the signal handlers we use is "void(*)(int)" while the real | |
56 | // signal handlers are extern "C" and so have incompatible type and at least | |
57 | // Sun CC warns about it, so use explicit casts to suppress these warnings as | |
58 | // they should be harmless | |
59 | extern "C" | |
60 | { | |
61 | typedef void (*SignalHandler_t)(int); | |
62 | } | |
63 | ||
64 | bool wxAppConsole::SetSignalHandler(int signal, SignalHandler handler) | |
65 | { | |
66 | const bool install = (SignalHandler_t)handler != SIG_DFL && | |
67 | (SignalHandler_t)handler != SIG_IGN; | |
68 | ||
69 | struct sigaction sa; | |
70 | memset(&sa, 0, sizeof(sa)); | |
71 | sa.sa_handler = (SignalHandler_t)&wxAppConsole::HandleSignal; | |
72 | sa.sa_flags = SA_RESTART; | |
73 | int res = sigaction(signal, &sa, 0); | |
74 | if ( res != 0 ) | |
75 | { | |
76 | wxLogSysError(_("Failed to install signal handler")); | |
77 | return false; | |
78 | } | |
79 | ||
80 | if ( install ) | |
81 | m_signalHandlerHash[signal] = handler; | |
82 | else | |
83 | m_signalHandlerHash.erase(signal); | |
84 | ||
85 | return true; | |
86 | } | |
87 |