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Member "wrk-4.2.0/src/ae_kqueue.c" (7 Feb 2021, 4567 Bytes) of package /linux/www/wrk-4.2.0.tar.gz:


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    1 /* Kqueue(2)-based ae.c module
    2  *
    3  * Copyright (C) 2009 Harish Mallipeddi - harish.mallipeddi@gmail.com
    4  * 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  *   * Redistributions of source code must retain the above copyright notice,
   10  *     this list of conditions and the following disclaimer.
   11  *   * Redistributions in binary form must reproduce the above copyright
   12  *     notice, this list of conditions and the following disclaimer in the
   13  *     documentation and/or other materials provided with the distribution.
   14  *   * Neither the name of Redis nor the names of its contributors may be used
   15  *     to endorse or promote products derived from this software without
   16  *     specific prior written permission.
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   19  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   21  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
   22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   28  * POSSIBILITY OF SUCH DAMAGE.
   29  */
   30 
   31 
   32 #include <sys/types.h>
   33 #include <sys/event.h>
   34 #include <sys/time.h>
   35 
   36 typedef struct aeApiState {
   37     int kqfd;
   38     struct kevent *events;
   39 } aeApiState;
   40 
   41 static int aeApiCreate(aeEventLoop *eventLoop) {
   42     aeApiState *state = zmalloc(sizeof(aeApiState));
   43 
   44     if (!state) return -1;
   45     state->events = zmalloc(sizeof(struct kevent)*eventLoop->setsize);
   46     if (!state->events) {
   47         zfree(state);
   48         return -1;
   49     }
   50     state->kqfd = kqueue();
   51     if (state->kqfd == -1) {
   52         zfree(state->events);
   53         zfree(state);
   54         return -1;
   55     }
   56     eventLoop->apidata = state;
   57     return 0;
   58 }
   59 
   60 static int aeApiResize(aeEventLoop *eventLoop, int setsize) {
   61     aeApiState *state = eventLoop->apidata;
   62 
   63     state->events = zrealloc(state->events, sizeof(struct kevent)*setsize);
   64     return 0;
   65 }
   66 
   67 static void aeApiFree(aeEventLoop *eventLoop) {
   68     aeApiState *state = eventLoop->apidata;
   69 
   70     close(state->kqfd);
   71     zfree(state->events);
   72     zfree(state);
   73 }
   74 
   75 static int aeApiAddEvent(aeEventLoop *eventLoop, int fd, int mask) {
   76     aeApiState *state = eventLoop->apidata;
   77     struct kevent ke;
   78 
   79     if (mask & AE_READABLE) {
   80         EV_SET(&ke, fd, EVFILT_READ, EV_ADD, 0, 0, NULL);
   81         if (kevent(state->kqfd, &ke, 1, NULL, 0, NULL) == -1) return -1;
   82     }
   83     if (mask & AE_WRITABLE) {
   84         EV_SET(&ke, fd, EVFILT_WRITE, EV_ADD, 0, 0, NULL);
   85         if (kevent(state->kqfd, &ke, 1, NULL, 0, NULL) == -1) return -1;
   86     }
   87     return 0;
   88 }
   89 
   90 static void aeApiDelEvent(aeEventLoop *eventLoop, int fd, int mask) {
   91     aeApiState *state = eventLoop->apidata;
   92     struct kevent ke;
   93 
   94     if (mask & AE_READABLE) {
   95         EV_SET(&ke, fd, EVFILT_READ, EV_DELETE, 0, 0, NULL);
   96         kevent(state->kqfd, &ke, 1, NULL, 0, NULL);
   97     }
   98     if (mask & AE_WRITABLE) {
   99         EV_SET(&ke, fd, EVFILT_WRITE, EV_DELETE, 0, 0, NULL);
  100         kevent(state->kqfd, &ke, 1, NULL, 0, NULL);
  101     }
  102 }
  103 
  104 static int aeApiPoll(aeEventLoop *eventLoop, struct timeval *tvp) {
  105     aeApiState *state = eventLoop->apidata;
  106     int retval, numevents = 0;
  107 
  108     if (tvp != NULL) {
  109         struct timespec timeout;
  110         timeout.tv_sec = tvp->tv_sec;
  111         timeout.tv_nsec = tvp->tv_usec * 1000;
  112         retval = kevent(state->kqfd, NULL, 0, state->events, eventLoop->setsize,
  113                         &timeout);
  114     } else {
  115         retval = kevent(state->kqfd, NULL, 0, state->events, eventLoop->setsize,
  116                         NULL);
  117     }
  118 
  119     if (retval > 0) {
  120         int j;
  121 
  122         numevents = retval;
  123         for(j = 0; j < numevents; j++) {
  124             int mask = 0;
  125             struct kevent *e = state->events+j;
  126 
  127             if (e->filter == EVFILT_READ) mask |= AE_READABLE;
  128             if (e->filter == EVFILT_WRITE) mask |= AE_WRITABLE;
  129             eventLoop->fired[j].fd = e->ident;
  130             eventLoop->fired[j].mask = mask;
  131         }
  132     }
  133     return numevents;
  134 }
  135 
  136 static char *aeApiName(void) {
  137     return "kqueue";
  138 }