src/fdevent_solaris_devpoll.c

   1 #include "first.h"
   2
   3 #include "fdevent_impl.h"
   4 #include "fdevent.h"
   5 #include "buffer.h"
   6
   7 #include <unistd.h>
   8 #include <stdlib.h>
   9 #include <string.h>
  10 #include <fcntl.h>
  11
  12 #ifdef FDEVENT_USE_SOLARIS_DEVPOLL
  13
  14 # include <sys/devpoll.h>
  15 # include <sys/ioctl.h>
  16
  17 __attribute_cold__
  18 static void fdevent_solaris_devpoll_free(fdevents *ev) {
  19         free(ev->devpollfds);
  20         close(ev->devpoll_fd);
  21 }
  22
  23 /* return -1 is fine here */
  24
  25 static int fdevent_solaris_devpoll_event_del(fdevents *ev, fdnode *fdn) {
  26         struct pollfd pfd;
  27         pfd.fd = fdn->fd;
  28         pfd.events = POLLREMOVE;
  29         pfd.revents = 0;
  30         return (-1 != write(ev->devpoll_fd, &pfd, sizeof(pfd))) ? 0 : -1;
  31 }
  32
  33 static int fdevent_solaris_devpoll_event_set(fdevents *ev, fdnode *fdn, int events) {
  34         struct pollfd pfd;
  35         pfd.fd = fdn->fde_ndx = fdn->fd;
  36         pfd.events = events;
  37         pfd.revents = 0;
  38         return (-1 != write(ev->devpoll_fd, &pfd, sizeof(pfd))) ? 0 : -1;
  39 }
  40
  41 static int fdevent_solaris_devpoll_poll(fdevents *ev, int timeout_ms) {
  42     int n;
  43     server * const srv = ev->srv;
  44     struct dvpoll dopoll;
  45
  46     dopoll.dp_timeout = timeout_ms;
  47     dopoll.dp_nfds = ev->maxfds - 1;
  48     dopoll.dp_fds = ev->devpollfds;
  49
  50     n = ioctl(ev->devpoll_fd, DP_POLL, &dopoll);
  51
  52     for (int i = 0; i < n; ++i) {
  53         fdnode * const fdn = ev->fdarray[ev->devpollfds[i].fd];
  54         int revents = ev->devpollfds[i].revents;
  55         if (0 == ((uintptr_t)fdn & 0x3)) {
  56             (*fdn->handler)(srv, fdn->ctx, revents);
  57         }
  58     }
  59     return n;
  60 }
  61
  62 __attribute_cold__
  63 int fdevent_solaris_devpoll_reset(fdevents *ev) {
  64         /* a forked process does only inherit the filedescriptor,
  65          * but every operation on the device will lead to a EACCES */
  66         if ((ev->devpoll_fd = fdevent_open_cloexec("/dev/poll", 1, O_RDWR, 0)) < 0) return -1;
  67         return 0;
  68 }
  69
  70 __attribute_cold__
  71 int fdevent_solaris_devpoll_init(fdevents *ev) {
  72         force_assert(POLLIN    == FDEVENT_IN);
  73         force_assert(POLLPRI   == FDEVENT_PRI);
  74         force_assert(POLLOUT   == FDEVENT_OUT);
  75         force_assert(POLLERR   == FDEVENT_ERR);
  76         force_assert(POLLHUP   == FDEVENT_HUP);
  77         force_assert(POLLNVAL  == FDEVENT_NVAL);
  78         force_assert(POLLRDHUP == FDEVENT_RDHUP);
  79
  80         ev->type       = FDEVENT_HANDLER_SOLARIS_DEVPOLL;
  81         ev->event_set  = fdevent_solaris_devpoll_event_set;
  82         ev->event_del  = fdevent_solaris_devpoll_event_del;
  83         ev->poll       = fdevent_solaris_devpoll_poll;
  84         ev->reset      = fdevent_solaris_devpoll_reset;
  85         ev->free       = fdevent_solaris_devpoll_free;
  86         ev->devpoll_fd = -1;
  87         ev->devpollfds = malloc(sizeof(*ev->devpollfds) * ev->maxfds);
  88         force_assert(NULL != ev->devpollfds);
  89         return 0;
  90 }
  91
  92 #endif