comparison: src/server/daemon/event_linux.c
src/server/daemon/event_linux.c
- changeset 41
- bb7a1f5a8b48
- child 43
- 8ac56edb4e94
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| 40:56cda23f48d4 | 41:bb7a1f5a8b48 |
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| 1 /* | |
| 2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. | |
| 3 * | |
| 4 * Copyright 2011 Olaf Wintermann. All rights reserved. | |
| 5 * | |
| 6 * Redistribution and use in source and binary forms, with or without | |
| 7 * modification, are permitted provided that the following conditions are met: | |
| 8 * | |
| 9 * 1. Redistributions of source code must retain the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer. | |
| 11 * | |
| 12 * 2. Redistributions in binary form must reproduce the above copyright | |
| 13 * notice, this list of conditions and the following disclaimer in the | |
| 14 * documentation and/or other materials provided with the distribution. | |
| 15 * | |
| 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
| 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE | |
| 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
| 26 * POSSIBILITY OF SUCH DAMAGE. | |
| 27 */ | |
| 28 | |
| 29 #include <stdio.h> | |
| 30 #include <stdlib.h> | |
| 31 #include <errno.h> | |
| 32 #include <sys/epoll.h> | |
| 33 | |
| 34 #include "../util/systhr.h" | |
| 35 #include "../util/atomic.h" | |
| 36 | |
| 37 | |
| 38 #include "event.h" | |
| 39 #include "event_linux.h" | |
| 40 | |
| 41 | |
| 42 event_handler_t* evhandler_create(int numthreads) { | |
| 43 event_handler_t *ev = malloc(sizeof(event_handler_t)); | |
| 44 if(ev == NULL) { | |
| 45 return NULL; | |
| 46 } | |
| 47 | |
| 48 ev->ep = calloc(numthreads, sizeof(int)); | |
| 49 if(ev->ep == NULL) { | |
| 50 free(ev); | |
| 51 return NULL; | |
| 52 } | |
| 53 ev->nep = numthreads; | |
| 54 ev->lep = 0; | |
| 55 | |
| 56 /* create ports event threads */ | |
| 57 for(int i=0;i<numthreads;i++) { | |
| 58 /* create port */ | |
| 59 ev->ep[i] = epoll_create(64); | |
| 60 if(ev->ep[i] == 0) { | |
| 61 free(ev->ep); | |
| 62 free(ev); | |
| 63 return NULL; | |
| 64 } | |
| 65 | |
| 66 /* | |
| 67 * start a new handler thread | |
| 68 * the thread needs the event port and a pointer to the event handler | |
| 69 */ | |
| 70 ev_thr_conf_t *conf = malloc(sizeof(ev_thr_conf_t)); | |
| 71 if(conf == NULL) { | |
| 72 free(ev->ep); | |
| 73 free(ev); | |
| 74 return NULL; | |
| 75 } | |
| 76 conf->handler = ev; | |
| 77 conf->ep = ev->ep[i]; | |
| 78 | |
| 79 ev_thr_conf_t *thrconf = malloc(sizeof(ev_thr_conf_t)); | |
| 80 thrconf->handler = ev; | |
| 81 thrconf->ep= ev->ep[i]; | |
| 82 systhread_start(0, 0, (thrstartfunc)ev_handle_events, thrconf); | |
| 83 /* TODO: error handling */ | |
| 84 } | |
| 85 | |
| 86 return ev; | |
| 87 } | |
| 88 | |
| 89 | |
| 90 void ev_handle_events(ev_thr_conf_t *conf) { | |
| 91 event_handler_t *ev = conf->handler; | |
| 92 int ep = conf->ep; | |
| 93 | |
| 94 free(conf); | |
| 95 | |
| 96 //port_event_t events[16]; | |
| 97 struct epoll_event events[16]; | |
| 98 struct timespec timeout; | |
| 99 timeout.tv_nsec = 0; | |
| 100 timeout.tv_sec = 600; | |
| 101 | |
| 102 for(;;) { | |
| 103 /* wait for events */ | |
| 104 int ret = epoll_wait(ep, events, 16, 0); | |
| 105 if(ret == -1) { | |
| 106 /* TODO: check for error */ | |
| 107 perror("epoll_wait"); | |
| 108 continue; | |
| 109 } | |
| 110 | |
| 111 for(int i=0;i<ret;i++) { | |
| 112 event_t *event = events[i].data.ptr; | |
| 113 if(event->fn) { | |
| 114 if(!event->fn(ev, event)) { | |
| 115 // event fn returned 0 -> remove event from epoll | |
| 116 if(epoll_ctl(ep, EPOLL_CTL_DEL, event->object, NULL) != 0){ | |
| 117 perror("epoll_ctl"); | |
| 118 } | |
| 119 } | |
| 120 } | |
| 121 } | |
| 122 } | |
| 123 } | |
| 124 | |
| 125 /* returns a event handler port */ | |
| 126 int ev_get_port(event_handler_t *h) { | |
| 127 int nps = h->nep; | |
| 128 if(nps == 1) { | |
| 129 return h->ep[0]; | |
| 130 } | |
| 131 | |
| 132 int cp = h->lep % nps; | |
| 133 ws_atomic_inc32(&h->lep); | |
| 134 | |
| 135 return h->ep[cp]; | |
| 136 } | |
| 137 | |
| 138 int ev_pollin(event_handler_t *h, int fd, event_t *event) { | |
| 139 event->object = (intptr_t)fd; | |
| 140 struct epoll_event epev; | |
| 141 epev.events = EPOLLIN | EPOLLET; /* input event, edge triggered */ | |
| 142 epev.data.ptr = event; | |
| 143 return epoll_ctl(ev_get_port(h), EPOLL_CTL_ADD, fd, &epev); | |
| 144 } | |
| 145 | |
| 146 int ev_pollout(event_handler_t *h, int fd, event_t *event) { | |
| 147 event->object = (intptr_t)fd; | |
| 148 struct epoll_event epev; | |
| 149 epev.events = EPOLLOUT | EPOLLET; /* input event, edge triggered */ | |
| 150 epev.data.ptr = event; | |
| 151 return epoll_ctl(ev_get_port(h), EPOLL_CTL_ADD, fd, &epev); | |
| 152 } | |
| 153 | |
| 154 int evt_send(event_handler_t *h, event_t *event) { | |
| 155 event->object = 0; | |
| 156 // TODO: implement using threadpool | |
| 157 fprintf(stderr, "Warning: evt_send not implemented\n"); | |
| 158 return 0; | |
| 159 } |
