void cache_wait(AbstractCache * cache) {
#else
void cache_wait_dbg(const char * file, int line, AbstractCache * cache) {
#endif
assert(is_dispatch_thread());
assert(current_client.client != NULL);
if (current_client.client != NULL) {
current_cache = cache;
cache_miss_cnt++;
#ifndef NDEBUG
current_client.file = file;
current_client.line = line;
current_client.time_stamp = time(NULL);
if (!cache_timer_posted) {
post_event_with_delay(cache_timer, NULL, 5000000);
cache_timer_posted = 1;
}
#endif
}
#ifndef NDEBUG
else {
trace(LOG_ALWAYS, "Illegal cache access at %s:%d", file, line);
}
#endif
exception(ERR_CACHE_MISS);
}
static ChannelServer * channel_server_create(PeerServer * ps, noPollCtx * np_ctx, noPollConn * np_listener, int is_ssl) {
ServerNP * si = (ServerNP *)loc_alloc_zero(sizeof *si);
/* TODO: need to investigate usage of sizeof(sockaddr_storage) for address buffer size */
si->serv.close = server_close;
si->sock = nopoll_conn_socket(np_listener);
si->serv.ps = ps;
if (server_list.next == NULL) {
list_init(&server_list);
post_event_with_delay(refresh_all_peer_servers, NULL, PEER_DATA_REFRESH_PERIOD * 1000000);
}
list_add_last(&si->serv.servlink, &channel_server_root);
shutdown_set_normal(&channel_shutdown);
list_add_last(&si->servlink, &server_list);
refresh_peer_server(si->sock, ps);
si->accreq.done = np_server_accept_done;
si->accreq.u.user.data = si;
si->accreq.u.user.func = np_wt_accept;
si->accreq.client_data = si;
si->accreq.type = AsyncReqUser;
si->np_listener = np_listener;
si->np_ctx = np_ctx;
si->is_ssl = is_ssl;
async_req_post(&si->accreq);
return &si->serv;
}
static int lua_post_event(lua_State *L)
{
struct post_event_extra *p;
unsigned long delay;
assert(L == luastate);
if(lua_gettop(L) > 2 || !lua_isfunction(L, 1) ||
(lua_gettop(L) > 1 && !(lua_isnil(L, 2) || lua_isnumber(L, 2)))) {
luaL_error(L, "wrong number or type of arguments");
}
p = (struct post_event_extra *)lua_newuserdata(L, sizeof *p);
memset(p, 0, sizeof *p);
p->L = L;
lua_pushvalue(L, -1);
p->self_refp = luaref_new(L, p);
lua_pushvalue(L, 1);
p->handler_refp = luaref_new(L, p);
trace(LOG_LUA, "lua_post_event %d", p->handler_refp);
luaL_getmetatable(L, "tcf_post_event");
lua_setmetatable(L, -2);
delay = lua_tointeger(L, 2);
if(delay == 0) {
post_event(lua_post_event_cb, p);
} else {
post_event_with_delay(lua_post_event_cb, p, delay);
}
return 1;
}
static void np_write_stream(OutputStream * out, int byte) {
ChannelNP * c = channel2np(out2channel(out));
assert(c->magic == CHANNEL_MAGIC);
if (!c->chan.out.supports_zero_copy || c->chan.out.cur >= c->chan.out.end - 32 || byte < 0) {
if (c->out_bin_block != NULL) np_bin_block_end(c);
if (c->chan.out.cur == c->chan.out.end) np_flush_with_flags(c, MSG_MORE);
if (byte < 0 || byte == ESC) {
char esc = 0;
*c->chan.out.cur++ = ESC;
if (byte == ESC) esc = 0;
else if (byte == MARKER_EOM) esc = 1;
else if (byte == MARKER_EOS) esc = 2;
else assert(0);
if (c->chan.out.cur == c->chan.out.end) np_flush_with_flags(c, MSG_MORE);
*c->chan.out.cur++ = esc;
if (byte == MARKER_EOM) {
c->out_eom_cnt++;
if (c->out_flush_cnt < 2) {
if (c->out_flush_cnt++ == 0) np_lock(&c->chan);
post_event_with_delay(np_flush_event, c, 0);
}
}
return;
}
}
else if (c->out_bin_block == NULL) {
np_bin_block_start(c);
}
*c->chan.out.cur++ = (char)byte;
}
static void clear_stale_peers(void * x) {
PeerServer ** sp = &peers;
PeerServer * s;
time_t timenow = time(NULL);
int keep_timer = 0;
assert(is_dispatch_thread());
while ((s = *sp) != NULL) {
if (s->expiration_time <= timenow) {
/* Delete stale entry */
*sp = s->next;
notify_listeners(s, PS_EVENT_REMOVED);
s->listed = 0;
peer_server_free(s);
}
else {
keep_timer = 1;
sp = &s->next;
}
}
if (keep_timer) {
post_event_with_delay(clear_stale_peers, NULL, PEER_DATA_REFRESH_PERIOD * 1000000);
}
else {
stale_timer_active = 0;
}
}
static void refresh_all_peer_servers(void * x) {
LINK * l = server_list.next;
while (l != &server_list) {
ServerNP * si = servlink2np(l);
refresh_peer_server(si->sock, si->serv.ps);
l = l->next;
}
post_event_with_delay(refresh_all_peer_servers, NULL, PEER_DATA_REFRESH_PERIOD * 1000000);
}
static void check_idle_timeout(void * args) {
if (list_is_empty(&channel_root)) {
idle_count++;
if (idle_count > idle_timeout) {
trace(LOG_ALWAYS, "No connections for %d seconds, shutting down", idle_timeout);
discovery_stop();
cancel_event_loop();
return;
}
}
post_event_with_delay(check_idle_timeout, NULL, 1000000);
}
void cache_wait(AbstractCache * cache) {
#else
void cache_wait_dbg(const char * file, int line, AbstractCache * cache) {
#endif
assert(is_dispatch_thread());
assert(client_exited == 0);
if (current_client.client != NULL && cache_miss_cnt == 0) {
if (cache->wait_list_cnt >= cache->wait_list_max) {
cache->wait_list_max += 8;
cache->wait_list_buf = (WaitingCacheClient *)loc_realloc(cache->wait_list_buf, cache->wait_list_max * sizeof(WaitingCacheClient));
}
if (current_client.args != NULL && !current_client.args_copy) {
void * mem = loc_alloc(current_client.args_size);
memcpy(mem, current_client.args, current_client.args_size);
current_client.args = mem;
current_client.args_copy = 1;
}
#ifndef NDEBUG
current_client.file = file;
current_client.line = line;
current_client.time_stamp = time(NULL);
if (!cache_timer_posted) {
post_event_with_delay(cache_timer, NULL, 5000000);
cache_timer_posted = 1;
}
#endif
if (cache->wait_list_cnt == 0) list_add_last(&cache->link, &cache_list);
if (current_client.channel != NULL) channel_lock_with_msg(current_client.channel, channel_lock_msg);
cache->wait_list_buf[cache->wait_list_cnt++] = current_client;
}
#ifndef NDEBUG
else if (current_client.client == NULL) {
trace(LOG_ALWAYS, "Illegal cache access at %s:%d", file, line);
}
#endif
cache_miss_cnt++;
exception(ERR_CACHE_MISS);
}
static void cache_timer(void * x) {
LINK * l;
time_t time_now = time(NULL);
assert(cache_timer_posted);
cache_timer_posted = 0;
for (l = cache_list.next; l != &cache_list; l = l->next) {
unsigned i;
AbstractCache * cache = link_all2cache(l);
assert(cache->wait_list_cnt > 0);
for (i = 0; i < cache->wait_list_cnt; i++) {
WaitingCacheClient * client = cache->wait_list_buf + i;
if (time_now - client->time_stamp >= 30) {
/* Client is waiting longer than 30 sec - it might be a bug */
trace(LOG_ALWAYS, "Stalled cache at %s:%d", client->file, client->line);
}
}
}
if (!list_is_empty(&cache_list)) {
post_event_with_delay(cache_timer, NULL, 5000000);
cache_timer_posted = 1;
}
}
static void pipe_write_stream(OutputStream * out, int byte) {
ChannelPIPE * c = channel2pipe(out2channel(out));
assert(c->magic == CHANNEL_MAGIC);
if (c->chan->state == ChannelStateDisconnected) return;
if (c->chan->out.cur == c->chan->out.end) pipe_flush(c);
if (byte < 0 || byte == ESC) {
char esc = 0;
*c->chan->out.cur++ = ESC;
if (byte == ESC) esc = 0;
else if (byte == MARKER_EOM) esc = 1;
else if (byte == MARKER_EOS) esc = 2;
else assert(0);
if (c->chan->state == ChannelStateDisconnected) return;
if (c->chan->out.cur == c->chan->out.end) pipe_flush(c);
*c->chan->out.cur++ = esc;
if (byte == MARKER_EOM && c->out_flush_cnt < 2) {
if (c->out_flush_cnt++ == 0) pipe_lock(c->chan);
post_event_with_delay(pipe_flush_event, c, 0);
}
return;
}
*c->chan->out.cur++ = (char)byte;
}
PeerServer * peer_server_add(PeerServer * n, unsigned int stale_delta) {
PeerServer ** sp = &peers;
PeerServer * s;
int type = PS_EVENT_ADDED;
assert(!n->listed);
assert(is_dispatch_thread());
while ((s = *sp) != NULL) {
if (strcmp(s->id, n->id) == 0) {
if (((s->flags & PS_FLAG_LOCAL) && !(n->flags & PS_FLAG_LOCAL)) || is_same(s, n)) {
/* Never replace local entries with discovered ones */
s->expiration_time = time(NULL) + stale_delta;
if (!(s->flags & PS_FLAG_LOCAL)) s->flags = n->flags;
peer_server_free(n);
notify_listeners(s, PS_EVENT_HEART_BEAT);
return s;
}
*sp = s->next;
s->listed = 0;
peer_server_free(s);
type = PS_EVENT_CHANGED;
break;
}
sp = &s->next;
}
n->listed = 1;
n->creation_time = time(NULL);
n->expiration_time = n->creation_time + stale_delta;
n->next = peers;
peers = n;
notify_listeners(n, type);
if (!stale_timer_active) {
stale_timer_active = 1;
post_event_with_delay(clear_stale_peers, NULL, PEER_DATA_REFRESH_PERIOD * 1000000);
}
return n;
}
static void port_connection_close(PortConnection * conn) {
PortServer * server = conn->server;
PortConnection * prev;
port_connection_unbind(conn);
if (conn->connected) {
if (server->disconnect_callback) server->disconnect_callback(server, server->callback_data);
disconnect_port(conn);
conn->connected = 0;
return;
}
if (conn->lock_cnt > 0) return;
if (server->list == conn) server->list = conn->next;
else {
prev = server->list;
while (prev->next != conn)
prev = prev->next;
assert (prev->next == conn);
prev->next = conn->next;
}
loc_free(conn);
/* If the last port connection has been closed and server shutdown is
* in progress, complete it.
*/
if (server->list == NULL) {
if (server->sock == -1) {
port_server_shutdown(server);
}
else if (server->auto_connect) {
/* Retry target connection */
post_event_with_delay(port_connection_open_event, server, server->auto_connect_period * 1000000);
}
}
}
static void run_safe_events(void * arg) {
LINK * qp;
pid_t mem;
if ((uintptr_t)arg != safe_event_generation) return;
assert(safe_event_list != NULL);
assert(are_channels_suspended(suspend_group));
safe_event_pid_count = 0;
mem = safe_event_list->mem;
for (qp = context_root.next; qp != &context_root; qp = qp->next) {
Context * ctx = ctxl2ctxp(qp);
if (ctx->exited || ctx->exiting || ctx->stopped || !context_has_state(ctx)) {
ctx->pending_safe_event = 0;
continue;
}
if (mem > 0 && ctx->mem != mem) {
ctx->pending_safe_event = 0;
continue;
}
if (!ctx->pending_step || ctx->pending_safe_event >= STOP_ALL_MAX_CNT / 2) {
if (context_stop(ctx) < 0) {
int error = errno;
#ifdef _WRS_KERNEL
if (error == S_vxdbgLib_INVALID_CTX) {
/* Most often this means that context has exited,
* but exit event is not delivered yet.
* Not an error. */
error = 0;
}
#endif
if (error) {
trace(LOG_ALWAYS, "error: can't temporary stop pid %d; error %d: %s",
ctx->pid, error, errno_to_str(error));
}
}
assert(!ctx->stopped);
}
if (ctx->pending_safe_event >= STOP_ALL_MAX_CNT) {
trace(LOG_ALWAYS, "error: can't temporary stop pid %d; error: timeout", ctx->pid);
ctx->exiting = 1;
ctx->pending_safe_event = 0;
}
else {
ctx->pending_safe_event++;
safe_event_pid_count++;
}
}
while (safe_event_list) {
Trap trap;
SafeEvent * i = safe_event_list;
assert((uintptr_t)arg == safe_event_generation);
if (safe_event_pid_count > 0) {
post_event_with_delay(run_safe_events, (void *)++safe_event_generation, STOP_ALL_TIMEOUT);
return;
}
if (mem > 0 && i->mem != mem) {
post_event(run_safe_events, (void *)++safe_event_generation);
return;
}
assert(is_all_stopped(i->mem));
safe_event_list = i->next;
if (set_trap(&trap)) {
i->done(i->arg);
clear_trap(&trap);
}
else {
trace(LOG_ALWAYS, "Unhandled exception in \"safe\" event dispatch: %d %s",
trap.error, errno_to_str(trap.error));
}
loc_free(i);
if ((uintptr_t)arg != safe_event_generation) return;
}
channels_resume(suspend_group);
cmdline_resume();
/* Lazily continue execution of temporary stopped contexts */
post_event(continue_temporary_stopped, (void *)safe_event_generation);
}
