Mercurial
annotate third_party/wrk/src/ae_epoll.c @ 194:fb28063dc490 hg-web
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| author | MrJuneJune <me@mrjunejune.com> |
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| date | Sun, 25 Jan 2026 20:19:42 -0800 |
| parents | 94705b5986b3 |
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| rev | line source |
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1 /* Linux epoll(2) based ae.c module |
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2 * |
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3 * Copyright (c) 2009-2012, Salvatore Sanfilippo <antirez at gmail dot com> |
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4 * 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 * * Redistributions of source code must retain the above copyright notice, |
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10 * this list of conditions and the following disclaimer. |
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11 * * Redistributions in binary form must reproduce the above copyright |
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12 * notice, this list of conditions and the following disclaimer in the |
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13 * documentation and/or other materials provided with the distribution. |
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14 * * Neither the name of Redis nor the names of its contributors may be used |
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15 * to endorse or promote products derived from this software without |
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16 * specific prior written permission. |
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17 * |
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18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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28 * POSSIBILITY OF SUCH DAMAGE. |
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29 */ |
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30 |
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31 |
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32 #include <sys/epoll.h> |
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33 |
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34 typedef struct aeApiState { |
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35 int epfd; |
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36 struct epoll_event *events; |
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37 } aeApiState; |
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38 |
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39 static int aeApiCreate(aeEventLoop *eventLoop) { |
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40 aeApiState *state = zmalloc(sizeof(aeApiState)); |
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41 |
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42 if (!state) return -1; |
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43 state->events = zmalloc(sizeof(struct epoll_event)*eventLoop->setsize); |
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44 if (!state->events) { |
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45 zfree(state); |
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46 return -1; |
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47 } |
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48 state->epfd = epoll_create(1024); /* 1024 is just a hint for the kernel */ |
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49 if (state->epfd == -1) { |
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50 zfree(state->events); |
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51 zfree(state); |
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52 return -1; |
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53 } |
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54 eventLoop->apidata = state; |
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55 return 0; |
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56 } |
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57 |
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58 static int aeApiResize(aeEventLoop *eventLoop, int setsize) { |
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59 aeApiState *state = eventLoop->apidata; |
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60 |
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61 state->events = zrealloc(state->events, sizeof(struct epoll_event)*setsize); |
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62 return 0; |
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63 } |
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64 |
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65 static void aeApiFree(aeEventLoop *eventLoop) { |
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66 aeApiState *state = eventLoop->apidata; |
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67 |
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68 close(state->epfd); |
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69 zfree(state->events); |
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70 zfree(state); |
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71 } |
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72 |
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73 static int aeApiAddEvent(aeEventLoop *eventLoop, int fd, int mask) { |
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74 aeApiState *state = eventLoop->apidata; |
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75 struct epoll_event ee = {0}; /* avoid valgrind warning */ |
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76 /* If the fd was already monitored for some event, we need a MOD |
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77 * operation. Otherwise we need an ADD operation. */ |
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78 int op = eventLoop->events[fd].mask == AE_NONE ? |
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79 EPOLL_CTL_ADD : EPOLL_CTL_MOD; |
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80 |
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81 ee.events = 0; |
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82 mask |= eventLoop->events[fd].mask; /* Merge old events */ |
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83 if (mask & AE_READABLE) ee.events |= EPOLLIN; |
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84 if (mask & AE_WRITABLE) ee.events |= EPOLLOUT; |
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85 ee.data.fd = fd; |
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86 if (epoll_ctl(state->epfd,op,fd,&ee) == -1) return -1; |
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87 return 0; |
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88 } |
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89 |
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90 static void aeApiDelEvent(aeEventLoop *eventLoop, int fd, int delmask) { |
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91 aeApiState *state = eventLoop->apidata; |
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92 struct epoll_event ee = {0}; /* avoid valgrind warning */ |
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93 int mask = eventLoop->events[fd].mask & (~delmask); |
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94 |
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95 ee.events = 0; |
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96 if (mask & AE_READABLE) ee.events |= EPOLLIN; |
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97 if (mask & AE_WRITABLE) ee.events |= EPOLLOUT; |
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98 ee.data.fd = fd; |
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99 if (mask != AE_NONE) { |
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100 epoll_ctl(state->epfd,EPOLL_CTL_MOD,fd,&ee); |
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101 } else { |
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102 /* Note, Kernel < 2.6.9 requires a non null event pointer even for |
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103 * EPOLL_CTL_DEL. */ |
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104 epoll_ctl(state->epfd,EPOLL_CTL_DEL,fd,&ee); |
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105 } |
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106 } |
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107 |
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108 static int aeApiPoll(aeEventLoop *eventLoop, struct timeval *tvp) { |
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109 aeApiState *state = eventLoop->apidata; |
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110 int retval, numevents = 0; |
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111 |
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112 retval = epoll_wait(state->epfd,state->events,eventLoop->setsize, |
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113 tvp ? (tvp->tv_sec*1000 + tvp->tv_usec/1000) : -1); |
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114 if (retval > 0) { |
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115 int j; |
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116 |
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117 numevents = retval; |
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118 for (j = 0; j < numevents; j++) { |
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119 int mask = 0; |
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120 struct epoll_event *e = state->events+j; |
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121 |
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122 if (e->events & EPOLLIN) mask |= AE_READABLE; |
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123 if (e->events & EPOLLOUT) mask |= AE_WRITABLE; |
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124 if (e->events & EPOLLERR) mask |= AE_WRITABLE; |
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125 if (e->events & EPOLLHUP) mask |= AE_WRITABLE; |
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126 eventLoop->fired[j].fd = e->data.fd; |
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127 eventLoop->fired[j].mask = mask; |
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128 } |
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129 } |
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130 return numevents; |
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131 } |
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132 |
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133 static char *aeApiName(void) { |
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134 return "epoll"; |
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135 } |