diff options
Diffstat (limited to 'src/ae_kqueue.c')
| -rw-r--r-- | src/ae_kqueue.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/src/ae_kqueue.c b/src/ae_kqueue.c new file mode 100644 index 0000000..6796f4c --- /dev/null +++ b/src/ae_kqueue.c @@ -0,0 +1,138 @@ +/* Kqueue(2)-based ae.c module + * + * Copyright (C) 2009 Harish Mallipeddi - [email protected] + * 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 int aeApiResize(aeEventLoop *eventLoop, int setsize) { + aeApiState *state = eventLoop->apidata; + + state->events = zrealloc(state->events, sizeof(struct kevent)*setsize); + 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"; +} |