lws-state.h

 /*
 * libwebsockets - small server side websockets and web server implementation
 *
 * Copyright (C) 2010 - 2019 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.
 */
 
struct lws_state_notify_link;
struct lws_state_manager;
 
#if defined(LWS_WITH_SYS_STATE)
 
typedef int (*lws_state_notify_t)(struct lws_state_manager *mgr,
                                  struct lws_state_notify_link *link,
                                  int current, int target);
 
typedef struct lws_state_notify_link {
        lws_dll2_t              list;
        lws_state_notify_t      notify_cb;
        const char              *name;
} lws_state_notify_link_t;
 
typedef struct lws_state_manager {
        lws_dll2_owner_t        notify_list;
        struct lws_context      *context;
        void                    *parent;
#if defined(LWS_WITH_SYS_SMD)
        lws_smd_class_t         smd_class;
#endif
        const char              **state_names;
        const char              *name;
        int                     state;
} lws_state_manager_t;
 
LWS_EXTERN LWS_VISIBLE void
lws_state_reg_notifier(lws_state_manager_t *mgr, lws_state_notify_link_t *nl);
 
LWS_EXTERN LWS_VISIBLE void
lws_state_reg_deregister(lws_state_notify_link_t *nl);
 
LWS_EXTERN LWS_VISIBLE void
lws_state_reg_notifier_list(lws_state_manager_t *mgr,
                            lws_state_notify_link_t * const *nl);
 
LWS_EXTERN LWS_VISIBLE int
lws_state_transition_steps(lws_state_manager_t *mgr, int target);
 
LWS_EXTERN LWS_VISIBLE int
lws_state_transition(lws_state_manager_t *mgr, int target);
 
#else
 
#endif