diff options
Diffstat (limited to 'usr.sbin/sendmail/src/clock.c')
| -rw-r--r-- | usr.sbin/sendmail/src/clock.c | 287 |
1 files changed, 0 insertions, 287 deletions
diff --git a/usr.sbin/sendmail/src/clock.c b/usr.sbin/sendmail/src/clock.c deleted file mode 100644 index 6940b297894e..000000000000 --- a/usr.sbin/sendmail/src/clock.c +++ /dev/null @@ -1,287 +0,0 @@ -/* - * Copyright (c) 1983, 1995-1997 Eric P. Allman - * Copyright (c) 1988, 1993 - * The Regents of the University of California. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#ifndef lint -static char sccsid[] = "@(#)clock.c 8.24 (Berkeley) 4/19/97"; -#endif /* not lint */ - -# include "sendmail.h" - -# ifndef sigmask -# define sigmask(s) (1 << ((s) - 1)) -# endif - -/* -** SETEVENT -- set an event to happen at a specific time. -** -** Events are stored in a sorted list for fast processing. -** An event only applies to the process that set it. -** -** Parameters: -** intvl -- intvl until next event occurs. -** func -- function to call on event. -** arg -- argument to func on event. -** -** Returns: -** none. -** -** Side Effects: -** none. -*/ - -EVENT *FreeEventList; /* list of free events */ - -static SIGFUNC_DECL tick __P((int)); - -EVENT * -setevent(intvl, func, arg) - time_t intvl; - void (*func)(); - int arg; -{ - register EVENT **evp; - register EVENT *ev; - auto time_t now; - int wasblocked; - - if (intvl <= 0) - { - syserr("554 setevent: intvl=%ld\n", intvl); - return (NULL); - } - - wasblocked = blocksignal(SIGALRM); - (void) time(&now); - - /* search event queue for correct position */ - for (evp = &EventQueue; (ev = *evp) != NULL; evp = &ev->ev_link) - { - if (ev->ev_time >= now + intvl) - break; - } - - /* insert new event */ - ev = FreeEventList; - if (ev == NULL) - ev = (EVENT *) xalloc(sizeof *ev); - else - FreeEventList = ev->ev_link; - ev->ev_time = now + intvl; - ev->ev_func = func; - ev->ev_arg = arg; - ev->ev_pid = getpid(); - ev->ev_link = *evp; - *evp = ev; - - if (tTd(5, 5)) - printf("setevent: intvl=%ld, for=%ld, func=%lx, arg=%d, ev=%lx\n", - intvl, now + intvl, (u_long) func, arg, (u_long) ev); - - setsignal(SIGALRM, tick); - intvl = EventQueue->ev_time - now; - (void) alarm((unsigned) intvl < 1 ? 1 : intvl); - if (wasblocked == 0) - (void) releasesignal(SIGALRM); - return (ev); -} - /* -** CLREVENT -- remove an event from the event queue. -** -** Parameters: -** ev -- pointer to event to remove. -** -** Returns: -** none. -** -** Side Effects: -** arranges for event ev to not happen. -*/ - -void -clrevent(ev) - register EVENT *ev; -{ - register EVENT **evp; - int wasblocked; - - if (tTd(5, 5)) - printf("clrevent: ev=%lx\n", (u_long) ev); - if (ev == NULL) - return; - - /* find the parent event */ - wasblocked = blocksignal(SIGALRM); - for (evp = &EventQueue; *evp != NULL; evp = &(*evp)->ev_link) - { - if (*evp == ev) - break; - } - - /* now remove it */ - if (*evp != NULL) - { - *evp = ev->ev_link; - ev->ev_link = FreeEventList; - FreeEventList = ev; - } - - /* restore clocks and pick up anything spare */ - if (wasblocked == 0) - releasesignal(SIGALRM); - if (EventQueue != NULL) - kill(getpid(), SIGALRM); -} - /* -** TICK -- take a clock tick -** -** Called by the alarm clock. This routine runs events as needed. -** Always called as a signal handler, so we assume that SIGALRM -** has been blocked. -** -** Parameters: -** One that is ignored; for compatibility with signal handlers. -** -** Returns: -** none. -** -** Side Effects: -** calls the next function in EventQueue. -*/ - -static SIGFUNC_DECL -tick(arg) - int arg; -{ - register time_t now; - register EVENT *ev; - int mypid = getpid(); - int olderrno = errno; - - (void) alarm(0); - now = curtime(); - - if (tTd(5, 4)) - printf("tick: now=%ld\n", now); - - /* reset signal in case System V semantics */ - (void) setsignal(SIGALRM, tick); - while ((ev = EventQueue) != NULL && - (ev->ev_time <= now || ev->ev_pid != mypid)) - { - void (*f)(); - int arg; - int pid; - - /* process the event on the top of the queue */ - ev = EventQueue; - EventQueue = EventQueue->ev_link; - if (tTd(5, 6)) - printf("tick: ev=%lx, func=%lx, arg=%d, pid=%d\n", - (u_long) ev, (u_long) ev->ev_func, - ev->ev_arg, ev->ev_pid); - - /* we must be careful in here because ev_func may not return */ - f = ev->ev_func; - arg = ev->ev_arg; - pid = ev->ev_pid; - ev->ev_link = FreeEventList; - FreeEventList = ev; - if (pid != getpid()) - continue; - if (EventQueue != NULL) - { - if (EventQueue->ev_time > now) - (void) alarm((unsigned) (EventQueue->ev_time - now)); - else - (void) alarm(3); - } - - /* call ev_func */ - errno = olderrno; - (*f)(arg); - (void) alarm(0); - now = curtime(); - } - if (EventQueue != NULL) - (void) alarm((unsigned) (EventQueue->ev_time - now)); - errno = olderrno; - return SIGFUNC_RETURN; -} - /* -** SLEEP -- a version of sleep that works with this stuff -** -** Because sleep uses the alarm facility, I must reimplement -** it here. -** -** Parameters: -** intvl -- time to sleep. -** -** Returns: -** none. -** -** Side Effects: -** waits for intvl time. However, other events can -** be run during that interval. -*/ - -static bool SleepDone; -static void endsleep(); - -#ifndef SLEEP_T -# define SLEEP_T unsigned int -#endif - -SLEEP_T -sleep(intvl) - unsigned int intvl; -{ - int was_held; - - if (intvl == 0) - return (SLEEP_T) 0; - SleepDone = FALSE; - (void) setevent((time_t) intvl, endsleep, 0); - was_held = releasesignal(SIGALRM); - while (!SleepDone) - pause(); - if (was_held > 0) - blocksignal(SIGALRM); - return (SLEEP_T) 0; -} - -static void -endsleep() -{ - SleepDone = TRUE; -} |