src/server/daemon/event.c

Sat, 13 Jan 2018 18:48:19 +0100

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sat, 13 Jan 2018 18:48:19 +0100
branch
aio
changeset 192
6a145e13d933
parent 159
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child 254
4784c14aa639
permissions
-rw-r--r--

replaces eventfd with pipe and closes aio branch

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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 "../../ucx/map.h"
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30 #include "../util/atomic.h"
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32 #include "event.h"
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34 UcxMap *event_handler_map = NULL;
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35 int numevhandlers = 0;
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36
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37 EVHandler *default_event_handler = NULL;
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38
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39 EVHandler *last_handler_c = NULL;
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40
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41 int create_event_handler(EventHandlerConfig *cfg) {
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42 if(event_handler_map == NULL) {
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43 event_handler_map = ucx_map_new(16);
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44 }
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46 /* if the event handler already exists, we don't modify it */
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47 if(ucx_map_sstr_get(event_handler_map, cfg->name)) {
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48 /* TODO: log message */
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49 /* TODO: set reload status */
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50 return 1;
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51 }
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53 /* create new handler */
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54 EVHandler *e = evhandler_create(cfg);
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55 if(e == NULL) {
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56 return 1;
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57 }
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58
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59 if(cfg->isdefault) {
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60 if(default_event_handler) {
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61 /* there can be only one default event handler */
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62 /* TODO: log warning */
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63 }
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64 default_event_handler = e;
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65 }
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67 int ret = ucx_map_sstr_put(event_handler_map, cfg->name, e);
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68 if(ret == 0) {
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69 last_handler_c = e;
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70 numevhandlers++;
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71 }
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73 return ret;
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74 }
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76 /*
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77 * checks if there is at least one event handler and a default handler
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78 * if necessary, check_event_handler_cfg() creates a default event handler
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79 */
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80 int check_event_handler_cfg() {
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81 if(numevhandlers > 0 ) {
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82 if(default_event_handler) {
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83 return 0;
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84 } else {
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85 default_event_handler = last_handler_c;
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86 return 0;
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87 }
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88 }
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89
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90 EventHandlerConfig cfg;
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91 cfg.name = sstr("default");
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92 cfg.nthreads = 1;
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93 cfg.isdefault = 1;
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94
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95 return create_event_handler(&cfg);
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96 }
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97
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98
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99 EVHandler* get_default_event_handler() {
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100 return default_event_handler;
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101 }
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102
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103 EVHandler* get_event_handler(char *name) {
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104 return ucx_map_cstr_get(event_handler_map, name);
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105 }
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106
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107 EventHandler* ev_instance(EVHandler *ev) {
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108 int nev = ev->numins;
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109 if(nev == 1) {
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110 return ev->instances[0];
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111 }
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112
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113 int ins = ev->current & nev;
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114 ws_atomic_inc32(&ev->current);
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115 return ev->instances[ins];
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116 }

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