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/*
* libwebsockets - small server side websockets and web server implementation
*
* Copyright (C) 2010 - 2020 Andy Green <andy@warmcat.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include "private-lib-core.h"
void
lws_state_reg_notifier(lws_state_manager_t *mgr,
lws_state_notify_link_t *notify_link)
{
lws_dll2_add_head(¬ify_link->list, &mgr->notify_list);
}
void
lws_state_reg_deregister(lws_state_notify_link_t *nl)
{
lws_dll2_remove(&nl->list);
}
void
lws_state_reg_notifier_list(lws_state_manager_t *mgr,
lws_state_notify_link_t * const *notify_link_array)
{
if (notify_link_array)
while (*notify_link_array)
lws_state_reg_notifier(mgr, *notify_link_array++);
}
#if (_LWS_ENABLED_LOGS & (LLL_INFO | LLL_DEBUG))
static const char *
_systnm(lws_state_manager_t *mgr, int state, char *temp8)
{
if (!mgr->state_names) {
lws_snprintf(temp8, 8, "%d", state);
return temp8;
}
return mgr->state_names[state];
}
#endif
static int
_report(lws_state_manager_t *mgr, int a, int b)
{
#if (_LWS_ENABLED_LOGS & LLL_INFO)
char temp8[8];
#endif
lws_start_foreach_dll(struct lws_dll2 *, d, mgr->notify_list.head) {
lws_state_notify_link_t *l =
lws_container_of(d, lws_state_notify_link_t, list);
if (l->notify_cb(mgr, l, a, b)) {
/* a dependency took responsibility for retry */
#if (_LWS_ENABLED_LOGS & LLL_INFO)
lwsl_cx_info(mgr->context, "%s: %s: rejected '%s' -> '%s'",
mgr->name, l->name,
_systnm(mgr, a, temp8),
_systnm(mgr, b, temp8));
#endif
return 1;
}
} lws_end_foreach_dll(d);
return 0;
}
static int
_lws_state_transition(lws_state_manager_t *mgr, int target)
{
#if (_LWS_ENABLED_LOGS & LLL_DEBUG)
char temp8[8];
#endif
if (_report(mgr, mgr->state, target))
return 1;
#if (_LWS_ENABLED_LOGS & LLL_DEBUG)
if (mgr->context)
lwsl_cx_debug(mgr->context, "%s: changed %d '%s' -> %d '%s'", mgr->name,
mgr->state, _systnm(mgr, mgr->state, temp8), target,
_systnm(mgr, target, temp8));
#endif
mgr->state = target;
/* Indicate success by calling the notifers again with both args same */
_report(mgr, target, target);
#if defined(LWS_WITH_SYS_SMD)
if (mgr->smd_class && mgr->context)
(void)lws_smd_msg_printf(mgr->context,
mgr->smd_class, "{\"state\":\"%s\"}",
mgr->state_names[target]);
#endif
return 0;
}
int
lws_state_transition_steps(lws_state_manager_t *mgr, int target)
{
int n = 0;
#if (_LWS_ENABLED_LOGS & LLL_INFO)
int i = mgr->state;
char temp8[8];
#endif
if (mgr->state > target)
return 0;
while (!n && mgr->state != target)
n = _lws_state_transition(mgr, mgr->state + 1);
#if (_LWS_ENABLED_LOGS & LLL_INFO)
lwsl_cx_info(mgr->context, "%s -> %s", _systnm(mgr, i, temp8),
_systnm(mgr, mgr->state, temp8));
#endif
return 0;
}
int
lws_state_transition(lws_state_manager_t *mgr, int target)
{
if (mgr->state != target)
_lws_state_transition(mgr, target);
return 0;
}
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