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#include "ruby/ruby.h"
#include "ruby/io.h"
static VALUE
wait_for_single_fd(VALUE ign, VALUE fd, VALUE events, VALUE timeout)
{
struct timeval tv;
struct timeval *tvp = NULL;
int rc;
if (!NIL_P(timeout)) {
tv = rb_time_timeval(timeout);
tvp = &tv;
}
rc = rb_wait_for_single_fd(NUM2INT(fd), NUM2INT(events), tvp);
if (rc == -1)
rb_sys_fail("rb_wait_for_single_fd");
return INT2NUM(rc);
}
#ifdef HAVE_KQUEUE
/* ensure rb_wait_for_single_fd works on kqueue descriptors */
#include <sys/types.h>
#include <sys/time.h>
#include <sys/event.h>
static VALUE
kqueue_test_wait(VALUE klass)
{
int kqfd = -1;
int p[2] = { -1, -1 };
struct timeval tv = { 0, 0 };
const struct timespec ts = { 1, 0 };
struct kevent kev;
const char *msg;
VALUE ret = Qfalse;
int e = 0;
int n;
msg = "pipe";
if (rb_cloexec_pipe(p) < 0) goto err;
msg = "kqueue";
kqfd = kqueue();
if (kqfd < 0) goto err;
n = rb_wait_for_single_fd(kqfd, RB_WAITFD_IN, &tv);
if (n != 0) {
msg = "spurious wakeup";
errno = 0;
goto err;
}
msg = "write";
if (write(p[1], "", 1) < 0) goto err;
EV_SET(&kev, p[0], EVFILT_READ, EV_ADD, 0, 0, 0);
msg = "kevent";
n = kevent(kqfd, &kev, 1, &kev, 1, &ts);
if (n < 0) goto err;
msg = NULL;
if (n == 1) {
n = rb_wait_for_single_fd(kqfd, RB_WAITFD_IN, &tv);
ret = INT2NUM(n);
}
else {
rb_warn("kevent did not return readiness");
}
err:
if (msg) e = errno;
if (p[0] >= 0) close(p[0]);
if (p[1] >= 0) close(p[1]);
if (kqfd >= 0) close(kqfd);
if (msg) {
if (e) rb_syserr_fail(e, msg);
rb_raise(rb_eRuntimeError, "%s", msg);
}
return ret;
}
#endif /* HAVE_KQUEUE */
void
Init_wait_for_single_fd(void)
{
rb_define_const(rb_cObject, "RB_WAITFD_IN", INT2NUM(RB_WAITFD_IN));
rb_define_const(rb_cObject, "RB_WAITFD_OUT", INT2NUM(RB_WAITFD_OUT));
rb_define_const(rb_cObject, "RB_WAITFD_PRI", INT2NUM(RB_WAITFD_PRI));
rb_define_singleton_method(rb_cIO, "wait_for_single_fd",
wait_for_single_fd, 3);
#ifdef HAVE_KQUEUE
rb_define_singleton_method(rb_cIO, "kqueue_test_wait", kqueue_test_wait, 0);
#endif
}
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