| /* Kqueue(2)-based ae.c module |
| * |
| * Copyright (C) 2009 Harish Mallipeddi - harish.mallipeddi@gmail.com |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * * Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * * Neither the name of Redis nor the names of its contributors may be used |
| * to endorse or promote products derived from this software without |
| * specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| |
| #include <sys/types.h> |
| #include <sys/event.h> |
| #include <sys/time.h> |
| |
| typedef struct aeApiState { |
| int kqfd; |
| struct kevent *events; |
| } aeApiState; |
| |
| static int aeApiCreate(aeEventLoop *eventLoop) { |
| aeApiState *state = zmalloc(sizeof(aeApiState)); |
| |
| if (!state) return -1; |
| state->events = zmalloc(sizeof(struct kevent)*eventLoop->setsize); |
| if (!state->events) { |
| zfree(state); |
| return -1; |
| } |
| state->kqfd = kqueue(); |
| if (state->kqfd == -1) { |
| zfree(state->events); |
| zfree(state); |
| return -1; |
| } |
| eventLoop->apidata = state; |
| |
| return 0; |
| } |
| |
| static void aeApiFree(aeEventLoop *eventLoop) { |
| aeApiState *state = eventLoop->apidata; |
| |
| close(state->kqfd); |
| zfree(state->events); |
| zfree(state); |
| } |
| |
| static int aeApiAddEvent(aeEventLoop *eventLoop, int fd, int mask) { |
| aeApiState *state = eventLoop->apidata; |
| struct kevent ke; |
| |
| if (mask & AE_READABLE) { |
| EV_SET(&ke, fd, EVFILT_READ, EV_ADD, 0, 0, NULL); |
| if (kevent(state->kqfd, &ke, 1, NULL, 0, NULL) == -1) return -1; |
| } |
| if (mask & AE_WRITABLE) { |
| EV_SET(&ke, fd, EVFILT_WRITE, EV_ADD, 0, 0, NULL); |
| if (kevent(state->kqfd, &ke, 1, NULL, 0, NULL) == -1) return -1; |
| } |
| return 0; |
| } |
| |
| static void aeApiDelEvent(aeEventLoop *eventLoop, int fd, int mask) { |
| aeApiState *state = eventLoop->apidata; |
| struct kevent ke; |
| |
| if (mask & AE_READABLE) { |
| EV_SET(&ke, fd, EVFILT_READ, EV_DELETE, 0, 0, NULL); |
| kevent(state->kqfd, &ke, 1, NULL, 0, NULL); |
| } |
| if (mask & AE_WRITABLE) { |
| EV_SET(&ke, fd, EVFILT_WRITE, EV_DELETE, 0, 0, NULL); |
| kevent(state->kqfd, &ke, 1, NULL, 0, NULL); |
| } |
| } |
| |
| static int aeApiPoll(aeEventLoop *eventLoop, struct timeval *tvp) { |
| aeApiState *state = eventLoop->apidata; |
| int retval, numevents = 0; |
| |
| if (tvp != NULL) { |
| struct timespec timeout; |
| timeout.tv_sec = tvp->tv_sec; |
| timeout.tv_nsec = tvp->tv_usec * 1000; |
| retval = kevent(state->kqfd, NULL, 0, state->events, eventLoop->setsize, |
| &timeout); |
| } else { |
| retval = kevent(state->kqfd, NULL, 0, state->events, eventLoop->setsize, |
| NULL); |
| } |
| |
| if (retval > 0) { |
| int j; |
| |
| numevents = retval; |
| for(j = 0; j < numevents; j++) { |
| int mask = 0; |
| struct kevent *e = state->events+j; |
| |
| if (e->filter == EVFILT_READ) mask |= AE_READABLE; |
| if (e->filter == EVFILT_WRITE) mask |= AE_WRITABLE; |
| eventLoop->fired[j].fd = e->ident; |
| eventLoop->fired[j].mask = mask; |
| } |
| } |
| return numevents; |
| } |
| |
| static char *aeApiName(void) { |
| return "kqueue"; |
| } |