src/server/daemon/event_bsd.c

Mon, 06 Mar 2017 17:30:52 +0100

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Mon, 06 Mar 2017 17:30:52 +0100
branch
srvctrl
changeset 178
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parent 133
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child 170
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permissions
-rw-r--r--

closes branch srvctrl

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1 /*
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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3 *
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4 * Copyright 2013 Olaf Wintermann. All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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7 * modification, are permitted provided that the following conditions are met:
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8 *
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9 * 1. Redistributions of source code must retain the above copyright
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10 * notice, this list of conditions and the following disclaimer.
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11 *
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12 * 2. Redistributions in binary form must reproduce the above copyright
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13 * notice, this list of conditions and the following disclaimer in the
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14 * documentation and/or other materials provided with the distribution.
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15 *
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16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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26 * POSSIBILITY OF SUCH DAMAGE.
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27 */
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28
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29 #include <stdio.h>
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30 #include <stdlib.h>
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31
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32 #include "../util/atomic.h"
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33
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34 #include "event_bsd.h"
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35
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36 event_handler_t* evhandler_create(int numthreads) {
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37 event_handler_t *ev = malloc(sizeof(event_handler_t));
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38 if(ev == NULL) {
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39 return NULL;
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40 }
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41
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42 ev->ports = calloc(numthreads, sizeof(int));
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43 if(ev->ports == NULL) {
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44 free(ev);
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45 return NULL;
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46 }
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47 ev->nports = numthreads;
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48 ev->lp = 0;
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49
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50 /* create ports event threads */
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51 for(int i=0;i<numthreads;i++) {
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52 /* create port */
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53 //ev->ports[i] = port_create();
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54 ev->ports[i] = kqueue();
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55 if(ev->ports[i] == 0) {
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56 free(ev->ports);
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57 free(ev);
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58 return NULL;
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59 }
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60
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61 /*
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62 * start a new handler thread
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63 * the thread needs the event port and a pointer to the event handler
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64 */
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65 ev_thr_conf_t *conf = malloc(sizeof(ev_thr_conf_t));
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66 if(conf == NULL) {
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67 free(ev->ports);
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68 free(ev);
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69 return NULL;
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70 }
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71 conf->handler = ev;
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72 conf->port = ev->ports[i];
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73
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74 systhread_start(0, 0, (thrstartfunc)ev_handle_events, conf);
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75 /* TODO: error handling */
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76 }
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77
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78 return ev;
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79 }
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80
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81 void ev_handle_events(ev_thr_conf_t *conf) {
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82 event_handler_t *ev = conf->handler;
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83 int kq = conf->port;
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84
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85 free(conf);
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86
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87 struct timespec timeout;
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88 timeout.tv_nsec = 0;
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89 timeout.tv_sec = 600;
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90
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91 struct kevent events[16];
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92
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93 for(;;) {
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94 // wait for events
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95 int nev;
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96 nev = kevent(kq, NULL, 0, events, 16, &timeout);
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97 if(nev == -1) {
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98 // TODO: check for error
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99 perror("kevent");
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100 continue;
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101 }
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102
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103 for(int i=0;i<nev;i++) {
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104 event_t *event = (event_t*)events[i].udata;
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105 if(event->fn) {
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106 int ep = event->poll;
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107 if(event->fn(ev, event)) {
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108 // TODO: reassociate?
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109 // TODO: check ep and event->poll
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110 } else if(event->finish) {
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111 event->finish(ev, event);
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112 }
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113 }
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114 }
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115 }
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116 }
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117
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118 /* returns a event handler port */
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119 int ev_get_port(event_handler_t *h) {
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120 int nps = h->nports;
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121 if(nps == 1) {
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122 return h->ports[0];
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123 }
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124
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125 int cp = h->lp % nps;
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126 ws_atomic_inc32(&h->lp);
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127
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128 return h->ports[cp];
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129 }
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130
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131 int ev_pollin(event_handler_t *h, int fd, event_t *event) {
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132 event->poll = EVENT_POLLIN;
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133 struct kevent kev;
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134 EV_SET(&kev, fd, EVFILT_READ, EV_ADD, 0, 0, event);
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135 return kevent(ev_get_port(h), &kev, 1, NULL, 0, NULL);
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136 }
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137
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138 int ev_pollout(event_handler_t *h, int fd, event_t *event) {
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139 event->poll = EVENT_POLLOUT;
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140 struct kevent kev;
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141 EV_SET(&kev, fd, EVFILT_WRITE, EV_ADD, 0, 0, event);
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142 return kevent(ev_get_port(h), &kev, 1, NULL, 0, NULL);
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143 }
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144
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145 int evt_send(event_handler_t *h, event_t *event) {
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146 return 0;
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147 }

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