// the single threaded version of this call. will go away when we do direct
// event delivery (soon)
static VALUE method_zkrb_get_next_event_st(VALUE self) {
volatile VALUE rval = Qnil;
if (is_closed(self)) {
zkrb_debug("we are closed, not gonna try to get an event");
return Qnil;
}
FETCH_DATA_PTR(self, zk);
zkrb_event_t *event = zkrb_dequeue(zk->queue, 0);
if (event != NULL) {
rval = zkrb_event_to_ruby(event);
zkrb_event_free(event);
#if THREADED
int fd = zk->queue->pipe_read;
// we don't care in this case. this is just until i can remove the self
// pipe from the queue
char b[128];
while(read(fd, b, sizeof(b)) == sizeof(b)){}
#endif
}
return rval;
}
void zkrb_queue_free(zkrb_queue_t *queue) {
if (queue == NULL) return;
zkrb_event_t *elt = NULL;
while ((elt = zkrb_dequeue(queue)) != NULL) {
zkrb_event_free(elt);
}
free(queue);
}
static VALUE method_get_next_event(VALUE self, VALUE blocking) {
// dbg.h
check_debug(!is_closed(self), "we are closed, not trying to get event");
char buf[64];
FETCH_DATA_PTR(self, zk);
for (;;) {
check_debug(!is_closed(self), "we're closed in the middle of method_get_next_event, bailing");
zkrb_event_t *event = zkrb_dequeue(zk->queue, 1);
/* Wait for an event using rb_thread_select() on the queue's pipe */
if (event == NULL) {
if (NIL_P(blocking) || (blocking == Qfalse)) {
goto error;
}
else {
// if we're shutting down, don't enter this section, we don't want to block
check_debug(!is_shutting_down(self), "method_get_next_event, we're shutting down, don't enter blocking section");
int fd = zk->queue->pipe_read;
ssize_t bytes_read = 0;
// wait for an fd to become readable, opposite of rb_thread_fd_writable
rb_thread_wait_fd(fd);
// clear all bytes here, we'll catch all the events on subsequent calls
// (until we run out of events)
bytes_read = read(fd, buf, sizeof(buf));
if (bytes_read == -1) {
rb_raise(rb_eRuntimeError, "read failed: %d", errno);
}
zkrb_debug_inst(self, "read %zd bytes from the queue (%p)'s pipe", bytes_read, zk->queue);
continue;
}
}
VALUE hash = zkrb_event_to_ruby(event);
zkrb_event_free(event);
return hash;
}
error:
return Qnil;
}
static VALUE method_get_next_event(VALUE self, VALUE blocking) {
char buf[64];
FETCH_DATA_PTR(self, zk);
for (;;) {
// we use the is_running(self) method here because it allows us to have a
// ruby-land semaphore that we can also use in the java extension
//
if (is_closed(self) || !is_running(self)) {
zkrb_debug_inst(self, "is_closed(self): %d, is_running(self): %d, method_get_next_event is exiting loop", is_closed(self), is_running(self));
return Qnil; // this case for shutdown
}
zkrb_event_t *event = zkrb_dequeue(zk->queue, 1);
/* Wait for an event using rb_thread_select() on the queue's pipe */
if (event == NULL) {
if (NIL_P(blocking) || (blocking == Qfalse)) {
return Qnil; // no event for us
}
else {
int fd = zk->queue->pipe_read;
ssize_t bytes_read = 0;
// wait for an fd to become readable, opposite of rb_thread_fd_writable
rb_thread_wait_fd(fd);
bytes_read = read(fd, buf, sizeof(buf));
if (bytes_read == -1) {
rb_raise(rb_eRuntimeError, "read failed: %d", errno);
}
zkrb_debug_inst(self, "read %zd bytes from the queue (%p)'s pipe", bytes_read, zk->queue);
continue;
}
}
VALUE hash = zkrb_event_to_ruby(event);
zkrb_event_free(event);
return hash;
}
}
static VALUE method_get_next_event(VALUE self) {
char buf[64];
zkrb_event_t *event ;
int fd;
fd_set rset;
VALUE hash ;
FETCH_DATA_PTR(self, zk);
for (;;) {
// we use the is_running(self) method here because it allows us to have a
// ruby-land semaphore that we can also use in the java extension
//
if (!is_running(self)) {
/* fprintf(stderr, "method_get_next_event: running is false, returning nil\n");*/
return Qnil; // this case for shutdown
}
event = zkrb_dequeue(zk->queue, 1);
/* Wait for an event using rb_thread_select() on the queue's pipe */
if (event == NULL) {
fd = zk->queue->pipe_read;
FD_ZERO(&rset);
FD_SET(fd, &rset);
if (rb_thread_select(fd + 1, &rset, NULL, NULL, NULL) == -1)
rb_raise(rb_eRuntimeError, "select failed: %d", errno);
if (read(fd, buf, sizeof(buf)) == -1)
rb_raise(rb_eRuntimeError, "read failed: %d", errno);
continue;
}
hash = zkrb_event_to_ruby(event);
zkrb_event_free(event);
return hash;
}
}
