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Diffstat (limited to 'examples/Reactor/Misc/test_signals.cpp')
| -rw-r--r-- | examples/Reactor/Misc/test_signals.cpp | 226 |
1 files changed, 0 insertions, 226 deletions
diff --git a/examples/Reactor/Misc/test_signals.cpp b/examples/Reactor/Misc/test_signals.cpp deleted file mode 100644 index 6493667de12..00000000000 --- a/examples/Reactor/Misc/test_signals.cpp +++ /dev/null @@ -1,226 +0,0 @@ -// Test the ability of the Reactor/Signal_Handler to register multiple -// $Id$ - -// handler per-signal. - -/* This test works as follows: - - 1. To test the "original" semantics of ACE (i.e., only one - ACE_Event_Handler can be registered per signal), you don't - need to do anything special. Existing programs work the - same since giving the Reactor's constructor a 0 value - (which is the default argument, BTW) instructs it to behave - as before. When a 0 is given, the ACE_Reactor's - constructor/open method creates an instance of - ACE_Sig_Handler and assigns this to an internal pointer. - This pointer is then used to dispatch all signal-related - methods within the Reactor. The default ACE_Sig_Handler - only allows *one* ACE_Event_Handler to be registered - per-signal. - - To run this version of the test do the following: - - % ./test-signal - ./test_signals - waiting for SIGINT or SIGQUIT - ^C - signal Interrupt occurred in Sig_Handler_2 (fruity, 0, 0) with count = 1 - waiting for SIGINT or SIGQUIT - ^\ - signal Quit occurred in Sig_Handler_2 (fruity, 0, 0) with count = 2 - shutting down SIGQUIT in Sig_Handler_2 (fruity, 0, 0) - waiting for SIGINT or SIGQUIT - ^C - signal Interrupt occurred in Sig_Handler_2 (fruity, 0, 0) with count = 3 - waiting for SIGINT or SIGQUIT - ^\Quit (core dumped) - - Note that in this test only one handler (the last one -- - "Sig_Handler_2 (fruity)") is actually registered. BTW, the - core dump is the expected behavior since the default - disposition is restored when there are no more handlers - (see the code below). - - 2. To test the "multiple handlers per-signal semantics", you - need to pass the constructor/open method of the ACE_Reactor - a pointer to a an instance of ACE_Sig_Handlers (note the - plural "s"). ACE_Sig_Handlers is a class that derives from - ACE_Sig_Handler. The difference between these two classes - is that (1) ACE_Sig_Handlers::register_signal allows - multiple ACE_Event_Handlers to be registered per-signal and - (2) it enables SA_RESTART by default. This class also - implements Detlef Becker's algorithm for integrating ACE - signal handling with 3rd party libraries. - - To run this version of the test do the following: - - % ./test_signals 1 - - waiting for SIGINT or SIGQUIT - ^C - signal Interrupt occurred in external handler! - signal Interrupt occurred in Sig_Handler_1 (howdy, 3, 1) with count = 1 - shutting down SIGINT in Sig_Handler_1 (howdy, 3, 1) - signal Interrupt occurred in Sig_Handler_1 (doody, 5, 4) with count = 1 - shutting down SIGINT in Sig_Handler_1 (doody, 5, 4) - signal Interrupt occurred in Sig_Handler_2 (tutty, 7, 6) with count = 1 - signal Interrupt occurred in Sig_Handler_2 (fruity, 9, 8) with count = 1 - waiting for SIGINT or SIGQUIT - ^\ - signal Quit occurred in Sig_Handler_1 (howdy, 3, 1) with count = 2 - shutting down SIGQUIT in Sig_Handler_1 (howdy, 3, 1) - signal Quit occurred in Sig_Handler_1 (doody, 5, 4) with count = 2 - shutting down SIGQUIT in Sig_Handler_1 (doody, 5, 4) - signal Quit occurred in Sig_Handler_2 (tutty, 7, 6) with count = 2 - shutting down SIGQUIT in Sig_Handler_2 (tutty, 7, 6) - signal Quit occurred in Sig_Handler_2 (fruity, 9, 8) with count = 2 - shutting down SIGQUIT in Sig_Handler_2 (fruity, 9, 8) - waiting for SIGINT or SIGQUIT - ^C - signal Interrupt occurred in external handler! - signal Interrupt occurred in Sig_Handler_2 (tutty, 7, 6) with count = 3 - signal Interrupt occurred in Sig_Handler_2 (fruity, 9, 8) with count = 3 - waiting for SIGINT or SIGQUIT - ^\Quit (core dumped) - - When this test begins all four handlers are registered and - dispatched when a SIGINT or SIGQUIT occurs. After the - first SIGINT, the handle_signal method of the Sig_Handler_1 - objects unregister themselves. At that point there are 4 - SIGQUIT handlers left, but only 2 of our SIGINT handlers - left (and the 1 external handler). After the first - SIGQUIT, there are no SIGQUIT handlers left since they all - deregister themselves (which restores the "SIG_DFL" - disposition). On the second SIGINT there are only 3 - handlers left (2 of ours and 1 external). Finally, on the - second SIGQUIT we exit and dump core since that's what - happens with the default disposition for SIGQUIT. */ - -#include "ace/Log_Msg.h" -#include "ace/Reactor.h" - -class Sig_Handler_1 : public ACE_Event_Handler -{ -public: - Sig_Handler_1 (ACE_Reactor &reactor, char *msg) - : msg_ (msg), - count_ (0), - reactor_ (reactor) - { - // Register the signal handlers. - this->quit_sigkey_ = reactor.register_handler (SIGQUIT, this); - this->int_sigkey_ = reactor.register_handler (SIGINT, this); - - if (this->quit_sigkey_ == -1 || this->int_sigkey_ == -1) - ACE_ERROR ((LM_ERROR, "%p\n", "register_handler")); - } - - virtual int handle_signal (int signum, siginfo_t *, ucontext_t *) - { - this->count_++; - ACE_DEBUG ((LM_DEBUG, - "\nsignal %S occurred in Sig_Handler_1 (%s, %d, %d) with count = %d", - signum, this->msg_, this->int_sigkey_, this->quit_sigkey_, this->count_)); - if (this->count_ != 1 && signum == SIGQUIT) - { - if (this->reactor_.remove_handler (SIGQUIT, 0, 0, - this->quit_sigkey_) == -1) - ACE_ERROR ((LM_ERROR, "\n%p", "remove_handler")); - else - ACE_DEBUG ((LM_DEBUG, "\nshutting down SIGQUIT in Sig_Handler_1 (%s, %d, %d)", - this->msg_, this->int_sigkey_, this->quit_sigkey_)); - } - else if (this->count_ != 2 && signum == SIGINT) - { - if (this->reactor_.remove_handler (SIGINT, 0, 0, - this->int_sigkey_) == -1) - ACE_ERROR ((LM_ERROR, "\n%p", "remove_handler")); - else - ACE_DEBUG ((LM_DEBUG, "\nshutting down SIGINT in Sig_Handler_1 (%s, %d, %d)", - this->msg_, this->int_sigkey_, this->quit_sigkey_)); - } - return 0; - } - -protected: - char *msg_; - int count_; - int int_sigkey_; - int quit_sigkey_; - ACE_Reactor &reactor_; -}; - -class Sig_Handler_2 : public Sig_Handler_1 -{ -public: - Sig_Handler_2 (ACE_Reactor &reactor, char *msg) - : Sig_Handler_1 (reactor, msg) - { - } - - virtual int handle_signal (int signum, siginfo_t *, ucontext_t *) - { - this->count_++; - ACE_DEBUG ((LM_DEBUG, - "\nsignal %S occurred in Sig_Handler_2 (%s, %d, %d) with count = %d", - signum, this->msg_, this->int_sigkey_, this->quit_sigkey_, this->count_)); - if (this->count_ != 0 && signum == SIGQUIT) - { - if (this->reactor_.remove_handler (SIGQUIT, 0, 0, - this->quit_sigkey_) == -1) - ACE_ERROR ((LM_ERROR, "\n%p", "remove_handler")); - else - ACE_DEBUG ((LM_DEBUG, "\nshutting down SIGQUIT in Sig_Handler_2 (%s, %d, %d)", - this->msg_, this->int_sigkey_, this->quit_sigkey_)); - } - else - return 0; - } -}; - -static void -external_handler (int signum) -{ - ACE_DEBUG ((LM_DEBUG, "\nsignal %S occurred in external handler!", signum)); -} - -#if !defined (HPUX) -int -main (int argc, char *argv) -{ - // If argc > 1 then allow multiple handlers per-signal, else just - // allow 1 handler per-signal. - ACE_Sig_Handlers multi_handlers; - - ACE_Reactor reactor (argc > 1 ? &multi_handlers: 0); - - if (argc > 1) - { - // Register an "external" signal handler so that the - // ACE_Sig_Handlers code will have something to incorporate! - ACE_SignalHandler eh = ACE_SignalHandler (external_handler); - ACE_Sig_Action sa (eh); - - sa.register_action (SIGINT); - } - - // Create a bevy of handlers. - Sig_Handler_1 h1 (reactor, "howdy"), h2 (reactor, "doody"); - Sig_Handler_2 h3 (reactor, "tutty"), h4 (reactor, "fruity"); - - // Wait for user to type SIGINT and SIGQUIT. - - for (;;) - { - ACE_DEBUG ((LM_DEBUG, "\nwaiting for SIGINT or SIGQUIT\n")); - reactor.handle_events (); - } - return 0; -} -#else -int -main (void) -{ - ACE_ERROR_RETURN ((LM_ERROR, "The HP C++ compiler is too lame to support this feature\n"), -1); -} -#endif /* HPUX */ |