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Diffstat (limited to 'compat/signal.c')
| -rw-r--r-- | compat/signal.c | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/compat/signal.c b/compat/signal.c new file mode 100644 index 0000000..7060305 --- /dev/null +++ b/compat/signal.c @@ -0,0 +1,204 @@ +/*--------------------------------------------------------------- + * Copyright (c) 1999,2000,2001,2002,2003 + * The Board of Trustees of the University of Illinois + * All Rights Reserved. + *--------------------------------------------------------------- + * Permission is hereby granted, free of charge, to any person + * obtaining a copy of this software (Iperf) and associated + * documentation files (the "Software"), to deal in the Software + * without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, + * sublicense, and/or sell copies of the Software, and to permit + * persons to whom the Software is furnished to do + * so, subject to the following conditions: + * + * + * Redistributions of source code must retain the above + * copyright notice, this list of conditions and + * the following disclaimers. + * + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimers in the documentation and/or other materials + * provided with the distribution. + * + * + * Neither the names of the University of Illinois, NCSA, + * nor the names of its contributors may be used to endorse + * or promote products derived from this Software without + * specific prior written permission. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES + * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE CONTIBUTORS OR COPYRIGHT + * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, + * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * ________________________________________________________________ + * National Laboratory for Applied Network Research + * National Center for Supercomputing Applications + * University of Illinois at Urbana-Champaign + * http://www.ncsa.uiuc.edu + * ________________________________________________________________ + * + * signal.c + * by Mark Gates <mgates@nlanr.net> + * ------------------------------------------------------------------- + * standard signal installer + * ------------------------------------------------------------------- */ + +#include "headers.h" +#include "util.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#ifdef WIN32 + +/* list of signal handlers. _NSIG is number of signals defined. */ + +static SigfuncPtr handlers[ _NSIG ] = { 0}; + +/* ------------------------------------------------------------------- + * sig_dispatcher + * + * dispatches the signal to appropriate signal handler. This emulates + * the signal handling of Unix. + * + * ------------------------------------------------------------------- */ + +BOOL WINAPI sig_dispatcher( DWORD type ) { + SigfuncPtr h = NULL; + int signo; + + switch ( type ) { + case CTRL_C_EVENT: + signo = SIGINT; + h = handlers[ SIGINT ]; + break; + + case CTRL_CLOSE_EVENT: + case CTRL_LOGOFF_EVENT: + case CTRL_SHUTDOWN_EVENT: + signo = SIGTERM; + h = handlers[ SIGTERM ]; + break; + + default: + break; + } + + if ( h != NULL ) { + // call the signal handler + h( signo ); + return 1; + } else { + return 0; + } +} + +/* ------------------------------------------------------------------- + * my_signal + * + * installs a signal handler. I emulate Unix signals by storing the + * function pointers and dispatching events myself, using the + * sig_dispatcher above. + * ------------------------------------------------------------------- */ + +SigfuncPtr my_signal( int inSigno, SigfuncPtr inFunc ) { + SigfuncPtr old = NULL; + + if ( inSigno >= 0 && inSigno < _NSIG ) { + old = handlers[ inSigno ]; + handlers[ inSigno ] = inFunc; + } + + return old; +} /* end my_signal */ + +#else /* not WIN32 */ + +/* ------------------------------------------------------------------- + * my_signal + * + * installs a signal handler, and returns the old handler. + * This emulates the semi-standard signal() function in a + * standard way using the Posix sigaction function. + * + * from Stevens, 1998, section 5.8 + * ------------------------------------------------------------------- */ + +SigfuncPtr my_signal( int inSigno, SigfuncPtr inFunc ) { + struct sigaction theNewAction, theOldAction; + + assert( inFunc != NULL ); + + theNewAction.sa_handler = inFunc; + sigemptyset( &theNewAction.sa_mask ); + theNewAction.sa_flags = 0; + + if ( inSigno == SIGALRM ) { +#ifdef SA_INTERRUPT + theNewAction.sa_flags |= SA_INTERRUPT; /* SunOS 4.x */ +#endif + } else { +#ifdef SA_RESTART + theNewAction.sa_flags |= SA_RESTART; /* SVR4, 4.4BSD */ +#endif + } + + if ( sigaction( inSigno, &theNewAction, &theOldAction ) < 0 ) { + return SIG_ERR; + } else { + return theOldAction.sa_handler; + } +} /* end my_signal */ + +#endif /* not WIN32 */ + +/* ------------------------------------------------------------------- + * sig_exit + * + * Quietly exits. This protects some against being called multiple + * times. (TODO: should use a mutex to ensure (num++ == 0) is atomic.) + * ------------------------------------------------------------------- */ + +void sig_exit( int inSigno ) { + static int num = 0; + if ( num++ == 0 ) { + fflush( 0 ); + _exit(0); + } +} /* end sig_exit */ + +void disarm_itimer(void) { +#ifdef HAVE_SETITIMER + struct itimerval it; + memset (&it, 0, sizeof (it)); + setitimer(ITIMER_REAL, &it, NULL); +#endif +} + +int set_itimer(uintmax_t usecs) { + int err = 0; +#ifdef HAVE_SETITIMER + if (usecs < 0) { + WARN(1, "set_itimer value invalid"); + } else { + struct itimerval it; + memset (&it, 0, sizeof (it)); + it.it_value.tv_sec = (int)(usecs / 1000000); + it.it_value.tv_usec = (int)(usecs % 1000000); + err = setitimer(ITIMER_REAL, &it, NULL); + } +#endif + return err; +} + +#ifdef __cplusplus +} /* end extern "C" */ +#endif |