pegasus/src/Pegasus/Common/Signal.cpp - annotate

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1 karl 1.28 //%2006////////////////////////////////////////////////////////////////////////
2 kumpf 1.8 //
3 karl 1.20 // Copyright (c) 2000, 2001, 2002 BMC Software; Hewlett-Packard Development 4 // Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems. 5 // Copyright (c) 2003 BMC Software; Hewlett-Packard Development Company, L.P.;
6 karl 1.16 // IBM Corp.; EMC Corporation, The Open Group.
7 karl 1.20 // Copyright (c) 2004 BMC Software; Hewlett-Packard Development Company, L.P.; 8 // IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group.
9 karl 1.26 // Copyright (c) 2005 Hewlett-Packard Development Company, L.P.; IBM Corp.; 10 // EMC Corporation; VERITAS Software Corporation; The Open Group.
11 karl 1.28 // Copyright (c) 2006 Hewlett-Packard Development Company, L.P.; IBM Corp.; 12 // EMC Corporation; Symantec Corporation; The Open Group.
13 mike 1.2 // 14 // Permission is hereby granted, free of charge, to any person obtaining a copy 15 // of this software and associated documentation files (the "Software"), to 16 // deal in the Software without restriction, including without limitation the 17 // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 18 // sell copies of the Software, and to permit persons to whom the Software is 19 // furnished to do so, subject to the following conditions:
20 kumpf 1.8 //
21 mike 1.2 // THE ABOVE COPYRIGHT NOTICE AND THIS PERMISSION NOTICE SHALL BE INCLUDED IN 22 // ALL COPIES OR SUBSTANTIAL PORTIONS OF THE SOFTWARE. THE SOFTWARE IS PROVIDED 23 // "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT 24 // LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR 25 // PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 26 // HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 27 // ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 29 // 30 //============================================================================== 31 // 32 //%///////////////////////////////////////////////////////////////////////////// 33
34 kumpf 1.14 #include <cstdio> 35 #include <cstring>
36 keith.petley 1.15 #ifdef PEGASUS_PLATFORM_SOLARIS_SPARC_CC
37 tony 1.17 #include <iostream.h>
38 keith.petley 1.15 #endif
39 kumpf 1.14
40 mike 1.2 #include <Pegasus/Common/Config.h> 41 #include <Pegasus/Common/Signal.h>
42 david.dillard 1.22 #include <Pegasus/Common/Exception.h>
43 mike 1.2
44 kumpf 1.14 PEGASUS_USING_PEGASUS; 45 46 void sig_act(int s_n, PEGASUS_SIGINFO_T * s_info, void * sig)
47 mike 1.2 {
48 mike 1.29 ThreadReturnType retval = 0;
49 mike 1.2
50 kumpf 1.14 if (s_n == PEGASUS_SIGABRT) 51 { 52 printf("Received an abort signal\n");
53 chuck 1.27 #if defined(PEGASUS_HAS_SIGNALS) && !defined(PEGASUS_OS_OS400)
54 kumpf 1.14 printf(" in address %p\n", s_info->si_addr);
55 chuck 1.12 #endif
56 mike 1.2
57 kumpf 1.14 // In general it is dangerous to call pthread from within a 58 // signal handler, because they are not signal safe
59 mike 1.29 Threads::exit(retval);
60 kumpf 1.14 }
61 mike 1.2 } 62 63
64 kumpf 1.14 PEGASUS_NAMESPACE_BEGIN
65 mike 1.2
66 kumpf 1.14 #ifdef PEGASUS_HAS_SIGNALS
67 mike 1.2
68 david.dillard 1.21 SignalHandler::SignalHandler()
69 mike 1.2 {
70 kumpf 1.30 for (unsigned i = 0; i <= PEGASUS_NSIG; i++)
71 david.dillard 1.22 {
72 david.dillard 1.21 register_handler &rh = reg_handler[i]; 73 rh.signum = i; 74 rh.active = 0; 75 rh.sh = NULL; 76 memset(&rh.oldsa,0,sizeof(struct sigaction));
77 david.dillard 1.22 }
78 mike 1.2 } 79 80 SignalHandler::~SignalHandler() 81 {
82 david.dillard 1.22 deactivateAll();
83 mike 1.2 } 84
85 david.dillard 1.24 void SignalHandler::verifySignum(unsigned signum)
86 david.dillard 1.21 { 87 if ( signum > PEGASUS_NSIG ) 88 {
89 david.dillard 1.22 throw IndexOutOfBoundsException();
90 david.dillard 1.21 }
91 david.dillard 1.22 }
92 david.dillard 1.21
93 kumpf 1.30 SignalHandler::register_handler&
94 david.dillard 1.24 SignalHandler::getHandler(unsigned signum)
95 david.dillard 1.22 { 96 verifySignum(signum);
97 kumpf 1.30 return reg_handler[signum];
98 david.dillard 1.21 } 99
100 david.dillard 1.24 void SignalHandler::registerHandler(unsigned signum, signal_handler _sighandler)
101 mike 1.2 {
102 david.dillard 1.21 register_handler &rh = getHandler(signum);
103 a.arora 1.19 AutoMutex autoMut(reg_mutex);
104 david.dillard 1.21 deactivate_i(rh); 105 rh.sh = _sighandler;
106 mike 1.2 } 107
108 david.dillard 1.24 void SignalHandler::activate(unsigned signum)
109 mike 1.2 {
110 david.dillard 1.21 register_handler &rh = getHandler(signum);
111 a.arora 1.19 AutoMutex autoMut(reg_mutex);
112 david.dillard 1.21 if (rh.active) 113 { 114 return; // throw exception 115 }
116 mike 1.2
117 david.dillard 1.25 struct sigaction sig_acts;
118 mike 1.2
119 david.dillard 1.25 sig_acts.sa_sigaction = rh.sh; 120 sigfillset(&(sig_acts.sa_mask)); 121 sig_acts.sa_flags = SA_SIGINFO;
122 mike 1.2
123 david.dillard 1.25 sigaction(signum, &sig_acts, &rh.oldsa);
124 mike 1.2
125 david.dillard 1.21 rh.active = -1;
126 mike 1.2 } 127
128 david.dillard 1.24 void SignalHandler::deactivate(unsigned signum)
129 mike 1.2 {
130 david.dillard 1.22 register_handler &rh = getHandler(signum);
131 a.arora 1.19 AutoMutex autoMut(reg_mutex);
132 david.dillard 1.21 deactivate_i(rh);
133 mike 1.2 } 134
135 david.dillard 1.21 void SignalHandler::deactivate_i(register_handler &rh)
136 mike 1.2 {
137 david.dillard 1.21 if (rh.active)
138 mike 1.2 {
139 david.dillard 1.21 rh.active = 0; 140 sigaction(rh.signum, &rh.oldsa, NULL);
141 mike 1.2 } 142 } 143 144 void SignalHandler::deactivateAll() 145 {
146 a.arora 1.19 AutoMutex autoMut(reg_mutex);
147 david.dillard 1.24 for (unsigned i=0; i <= PEGASUS_NSIG; i++)
148 david.dillard 1.21 { 149 register_handler &rh = reg_handler[i]; 150 if (rh.active) 151 { 152 deactivate_i(rh); 153 } 154 }
155 mike 1.2 } 156
157 david.dillard 1.24 void SignalHandler::ignore(unsigned signum)
158 mike 1.2 {
159 david.dillard 1.21
160 david.dillard 1.22 verifySignum(signum);
161 david.dillard 1.21
162 kumpf 1.30 #if !defined(PEGASUS_PLATFORM_OS400_ISERIES_IBM) && \
163 mike 1.31 !defined(PEGASUS_OS_DARWIN)
164 david.dillard 1.22 sigignore(signum);
165 chuck 1.12 #else
166 david.dillard 1.25 struct sigaction sig_acts;
167 chuck 1.12
168 david.dillard 1.25 sig_acts.sa_handler = SIG_IGN; 169 sigfillset(&(sig_acts.sa_mask)); 170 sig_acts.sa_flags = 0;
171 chuck 1.12
172 david.dillard 1.25 sigaction(signum, &sig_acts, NULL);
173 chuck 1.12 #endif
174 mike 1.2 }
175 kumpf 1.14 176 #else // PEGASUS_HAS_SIGNALS 177 178 SignalHandler::SignalHandler() { } 179 180 SignalHandler::~SignalHandler() { } 181
182 david.dillard 1.24 void SignalHandler::registerHandler(unsigned signum, signal_handler _sighandler)
183 kumpf 1.14 { } 184
185 david.dillard 1.24 void SignalHandler::activate(unsigned signum) { }
186 kumpf 1.14
187 david.dillard 1.24 void SignalHandler::deactivate(unsigned signum) { }
188 kumpf 1.14 189 void SignalHandler::deactivateAll() { } 190
191 david.dillard 1.24 void SignalHandler::ignore(unsigned signum) { }
192 kumpf 1.14 193 #endif // PEGASUS_HAS_SIGNALS
194 mike 1.2 195 196 // export the global signal handling object 197 198 SignalHandler _globalSignalHandler; 199 SignalHandler * _globalSignalHandlerPtr = &_globalSignalHandler; 200 SignalHandler * getSigHandle() { return _globalSignalHandlerPtr; } 201 202 203 PEGASUS_NAMESPACE_END

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