/* * UDP fast timer to raise events for all but Solaris and NCR. * Called about 5 times per second (at unknown priority?). Must go to * splnet or obtain global lock before touching anything significant. */ static void rxk_fasttimo(void) { void (*tproc) (); struct clock temp; /* do rx fasttimo processing here */ rxevent_RaiseEvents(&temp); if (tproc = parent_proto.pr_fasttimo) (*tproc) (); }
/* * The event handling process. */ static void * event_handler(void *argp) { unsigned long rx_pthread_n_event_expired = 0; unsigned long rx_pthread_n_event_waits = 0; long rx_pthread_n_event_woken = 0; unsigned long rx_pthread_n_event_error = 0; struct timespec rx_pthread_next_event_time = { 0, 0 }; int error; MUTEX_ENTER(&event_handler_mutex); for (;;) { struct clock cv; struct clock next; MUTEX_EXIT(&event_handler_mutex); next.sec = 30; /* Time to sleep if there are no events scheduled */ next.usec = 0; clock_GetTime(&cv); rxevent_RaiseEvents(&next); MUTEX_ENTER(&event_handler_mutex); if (rx_pthread_event_rescheduled) { rx_pthread_event_rescheduled = 0; continue; } clock_Add(&cv, &next); rx_pthread_next_event_time.tv_sec = cv.sec; rx_pthread_next_event_time.tv_nsec = cv.usec * 1000; rx_pthread_n_event_waits++; error = CV_TIMEDWAIT(&rx_event_handler_cond, &event_handler_mutex, &rx_pthread_next_event_time); if (error == 0) { rx_pthread_n_event_woken++; } #ifdef AFS_NT40_ENV else if (error == ETIMEDOUT) { rx_pthread_n_event_expired++; } else { rx_pthread_n_event_error++; } #else else if (errno == ETIMEDOUT) { rx_pthread_n_event_expired++; } else { rx_pthread_n_event_error++; } #endif rx_pthread_event_rescheduled = 0; }
/* rx_kern.c */ static int rxk_fasttimo(void) { int code; int (*tproc) (); struct clock temp; SPLVAR; NETPRI; /* do rx fasttimo processing here */ rxevent_RaiseEvents(&temp); USERPRI; /* should this be after the call to tproc? */ if (tproc = parent_proto.pr_fasttimo) code = (*tproc) (); else code = 0; return code; }
static void rxi_ListenerProc(fd_set * rfds, int *tnop, struct rx_call **newcallp) { afs_uint32 host; u_short port; struct rx_packet *p = (struct rx_packet *)0; osi_socket socket; struct clock cv; afs_int32 nextPollTime; /* time to next poll FD before sleeping */ int lastPollWorked, doingPoll; /* true iff last poll was useful */ struct timeval tv, *tvp; int code; #ifdef AFS_NT40_ENV int i; #endif PROCESS pid; char name[MAXTHREADNAMELENGTH] = "srv_0"; clock_NewTime(); lastPollWorked = 0; nextPollTime = 0; code = LWP_CurrentProcess(&pid); if (code) { fprintf(stderr, "rxi_Listener: Can't get my pid.\n"); exit(1); } rx_listenerPid = pid; if (swapNameProgram) (*swapNameProgram) (pid, "listener", &name[0]); for (;;) { /* Grab a new packet only if necessary (otherwise re-use the old one) */ if (p) { rxi_RestoreDataBufs(p); } else { if (!(p = rxi_AllocPacket(RX_PACKET_CLASS_RECEIVE))) osi_Panic("rxi_ListenerProc: no packets!"); /* Shouldn't happen */ } /* Wait for the next event time or a packet to arrive. */ /* event_RaiseEvents schedules any events whose time has come and * then atomically computes the time to the next event, guaranteeing * that this is positive. If there is no next event, it returns 0 */ clock_NewTime(); if (!rxevent_RaiseEvents(&cv)) tvp = NULL; else { /* It's important to copy cv to tv, because the 4.3 documentation * for select threatens that *tv may be updated after a select, in * future editions of the system, to indicate how much of the time * period has elapsed. So we shouldn't rely on tv not being altered. */ tv.tv_sec = cv.sec; /* Time to next event */ tv.tv_usec = cv.usec; tvp = &tv; } rx_AtomicIncrement(rx_stats.selects, rx_stats_mutex); *rfds = rx_selectMask; if (lastPollWorked || nextPollTime < clock_Sec()) { /* we're catching up, or haven't tried to for a few seconds */ doingPoll = 1; nextPollTime = clock_Sec() + 4; /* try again in 4 seconds no matter what */ tv.tv_sec = tv.tv_usec = 0; /* make sure we poll */ tvp = &tv; code = select((int)(rx_maxSocketNumber + 1), rfds, 0, 0, tvp); } else { doingPoll = 0; code = IOMGR_Select((int)(rx_maxSocketNumber + 1), rfds, 0, 0, tvp); } lastPollWorked = 0; /* default is that it didn't find anything */ if (quitListening) { quitListening = 0; LWP_DestroyProcess(pid); } switch (code) { case 0: /* Timer interrupt: * If it was a timer interrupt then we can assume that * the time has advanced by roughly the value of the * previous timeout, and that there is now at least * one pending event. */ clock_NewTime(); break; case -1: /* select or IOMGR_Select returned failure */ debugSelectFailure++; /* update debugging counter */ clock_NewTime(); break; case -2: /* IOMGR_Cancel: * IOMGR_Cancel is invoked whenever a new event is * posted that is earlier than any existing events. * So we re-evaluate the time, and then go back to * reschedule events */ clock_NewTime(); break; default: /* Packets have arrived, presumably: * If it wasn't a timer interrupt, then no event should have * timed out yet (well some event may have, but only just...), so * we don't bother looking to see if any have timed out, but just * go directly to reading the data packets */ clock_NewTime(); if (doingPoll) lastPollWorked = 1; #ifdef AFS_NT40_ENV for (i = 0; p && i < rfds->fd_count; i++) { socket = rfds->fd_array[i]; if (rxi_ReadPacket(socket, p, &host, &port)) { *newcallp = NULL; p = rxi_ReceivePacket(p, socket, host, port, tnop, newcallp); if (newcallp && *newcallp) { if (p) { rxi_FreePacket(p); } if (swapNameProgram) { (*swapNameProgram) (rx_listenerPid, name, 0); rx_listenerPid = 0; } return; } } } #else for (socket = rx_minSocketNumber; p && socket <= rx_maxSocketNumber; socket++) { if (!FD_ISSET(socket, rfds)) continue; if (rxi_ReadPacket(socket, p, &host, &port)) { p = rxi_ReceivePacket(p, socket, host, port, tnop, newcallp); if (newcallp && *newcallp) { if (p) { rxi_FreePacket(p); } if (swapNameProgram) { (*swapNameProgram) (rx_listenerPid, name, 0); rx_listenerPid = 0; } return; } } } #endif break; } } /* NOTREACHED */ }