| 1 | /* Kqueue(2)-based ae.c module |
| 2 | * Copyright (C) 2009 Harish Mallipeddi - harish.mallipeddi@gmail.com |
| 3 | * Released under the BSD license. See the COPYING file for more info. */ |
| 4 | |
| 5 | #include <sys/types.h> |
| 6 | #include <sys/event.h> |
| 7 | #include <sys/time.h> |
| 8 | |
| 9 | typedef struct aeApiState { |
| 10 | int kqfd; |
| 11 | struct kevent events[AE_SETSIZE]; |
| 12 | } aeApiState; |
| 13 | |
| 14 | static int aeApiCreate(aeEventLoop *eventLoop) { |
| 15 | aeApiState *state = zmalloc(sizeof(aeApiState)); |
| 16 | |
| 17 | if (!state) return -1; |
| 18 | state->kqfd = kqueue(); |
| 19 | if (state->kqfd == -1) return -1; |
| 20 | eventLoop->apidata = state; |
| 21 | |
| 22 | return 0; |
| 23 | } |
| 24 | |
| 25 | static void aeApiFree(aeEventLoop *eventLoop) { |
| 26 | aeApiState *state = eventLoop->apidata; |
| 27 | |
| 28 | close(state->kqfd); |
| 29 | zfree(state); |
| 30 | } |
| 31 | |
| 32 | static int aeApiAddEvent(aeEventLoop *eventLoop, int fd, int mask) { |
| 33 | aeApiState *state = eventLoop->apidata; |
| 34 | struct kevent ke; |
| 35 | |
| 36 | if (mask & AE_READABLE) { |
| 37 | EV_SET(&ke, fd, EVFILT_READ, EV_ADD, 0, 0, NULL); |
| 38 | if (kevent(state->kqfd, &ke, 1, NULL, 0, NULL) == -1) return -1; |
| 39 | } |
| 40 | if (mask & AE_WRITABLE) { |
| 41 | EV_SET(&ke, fd, EVFILT_WRITE, EV_ADD, 0, 0, NULL); |
| 42 | if (kevent(state->kqfd, &ke, 1, NULL, 0, NULL) == -1) return -1; |
| 43 | } |
| 44 | return 0; |
| 45 | } |
| 46 | |
| 47 | static void aeApiDelEvent(aeEventLoop *eventLoop, int fd, int mask) { |
| 48 | aeApiState *state = eventLoop->apidata; |
| 49 | struct kevent ke; |
| 50 | |
| 51 | if (mask & AE_READABLE) { |
| 52 | EV_SET(&ke, fd, EVFILT_READ, EV_DELETE, 0, 0, NULL); |
| 53 | kevent(state->kqfd, &ke, 1, NULL, 0, NULL); |
| 54 | } |
| 55 | if (mask & AE_WRITABLE) { |
| 56 | EV_SET(&ke, fd, EVFILT_WRITE, EV_DELETE, 0, 0, NULL); |
| 57 | kevent(state->kqfd, &ke, 1, NULL, 0, NULL); |
| 58 | } |
| 59 | } |
| 60 | |
| 61 | static int aeApiPoll(aeEventLoop *eventLoop, struct timeval *tvp) { |
| 62 | aeApiState *state = eventLoop->apidata; |
| 63 | int retval, numevents = 0; |
| 64 | |
| 65 | if (tvp != NULL) { |
| 66 | struct timespec timeout; |
| 67 | timeout.tv_sec = tvp->tv_sec; |
| 68 | timeout.tv_nsec = tvp->tv_usec * 1000; |
| 69 | retval = kevent(state->kqfd, NULL, 0, state->events, AE_SETSIZE, &timeout); |
| 70 | } else { |
| 71 | retval = kevent(state->kqfd, NULL, 0, state->events, AE_SETSIZE, NULL); |
| 72 | } |
| 73 | |
| 74 | if (retval > 0) { |
| 75 | int j; |
| 76 | |
| 77 | numevents = retval; |
| 78 | for(j = 0; j < numevents; j++) { |
| 79 | int mask = 0; |
| 80 | struct kevent *e = state->events+j; |
| 81 | |
| 82 | if (e->filter == EVFILT_READ) mask |= AE_READABLE; |
| 83 | if (e->filter == EVFILT_WRITE) mask |= AE_WRITABLE; |
| 84 | eventLoop->fired[j].fd = e->ident; |
| 85 | eventLoop->fired[j].mask = mask; |
| 86 | } |
| 87 | } |
| 88 | return numevents; |
| 89 | } |
| 90 | |
| 91 | static char *aeApiName(void) { |
| 92 | return "kqueue"; |
| 93 | } |