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Add an always trigger list, so we can handle non-socket IO properly.

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This commit is contained in:
Ian Gulliver
2016-02-26 11:12:45 -08:00
parent 680cce544f
commit 8d9a11076b
3 changed files with 35 additions and 6 deletions
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34
adsbus/peer.c
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@@ -19,6 +19,7 @@ uint32_t peer_count_in = 0, peer_count_out = 0;
static int peer_epoll_fd;
static int peer_shutdown_fd;
static bool peer_shutdown_flag = false;
static struct list_head peer_always_trigger_head = LIST_HEAD_INIT(peer_always_trigger_head);
static void peer_shutdown_handler(struct peer *peer) {
fprintf(stderr, "X %s: Shutting down\n", server_id);
@@ -59,11 +60,28 @@ void peer_epoll_add(struct peer *peer, uint32_t events) {
.ptr = peer,
},
};
assert(!epoll_ctl(peer_epoll_fd, EPOLL_CTL_ADD, peer->fd, &ev));
peer->always_trigger = false;
int res = epoll_ctl(peer_epoll_fd, EPOLL_CTL_ADD, peer->fd, &ev);
if (res == -1 && errno == EPERM) {
// Not a socket
if (events) {
list_add(&peer->peer_always_trigger_list, &peer_always_trigger_head);
peer->always_trigger = true;
}
} else {
assert(!res);
}
}
void peer_epoll_del(struct peer *peer) {
assert(!epoll_ctl(peer_epoll_fd, EPOLL_CTL_DEL, peer->fd, NULL));
int res = epoll_ctl(peer_epoll_fd, EPOLL_CTL_DEL, peer->fd, NULL);
if (res == -1 && errno == EPERM) {
if (peer->always_trigger) {
list_del(&peer->peer_always_trigger_list);
}
} else {
assert(!res);
}
}
void peer_call(struct peer *peer) {
@@ -85,7 +103,8 @@ void peer_loop() {
}
#define MAX_EVENTS 10
struct epoll_event events[MAX_EVENTS];
int nfds = epoll_wait(peer_epoll_fd, events, MAX_EVENTS, wakeup_get_delay());
int delay = list_is_empty(&peer_always_trigger_head) ? wakeup_get_delay() : 0;
int nfds = epoll_wait(peer_epoll_fd, events, MAX_EVENTS, delay);
if (nfds == -1 && errno == EINTR) {
continue;
}
@@ -93,7 +112,14 @@ void peer_loop() {
for (int n = 0; n < nfds; n++) {
struct peer *peer = events[n].data.ptr;
peer->event_handler(peer);
peer_call(peer);
}
{
struct peer *iter, *next;
list_for_each_entry_safe(iter, next, &peer_always_trigger_head, peer_always_trigger_list) {
peer_call(iter);
}
}
wakeup_dispatch();