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1 /*
2  * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without modification,
6  * are permitted provided that the following conditions are met:
7  *
8  * 1. Redistributions of source code must retain the above copyright notice,
9  *    this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright notice,
11  *    this list of conditions and the following disclaimer in the documentation
12  *    and/or other materials provided with the distribution.
13  * 3. The name of the author may not be used to endorse or promote products
14  *    derived from this software without specific prior written permission.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
19  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
21  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
22  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
24  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
25  * OF SUCH DAMAGE.
26  *
27  * This file is part of the lwIP TCP/IP stack.
28  *
29  * Author: Adam Dunkels <adam@sics.se>
30  *         Simon Goldschmidt
31  *
32  */
33 #ifndef __LWIP_TIMERS_H__
34 #define __LWIP_TIMERS_H__
35 
36 #include "lwip/opt.h"
37 
38 /* Timers are not supported when NO_SYS==1 and NO_SYS_NO_TIMERS==1 */
39 #define LWIP_TIMERS (!NO_SYS || (NO_SYS && !NO_SYS_NO_TIMERS))
40 
41 #if LWIP_TIMERS
42 
43 #include "lwip/err.h"
44 #include "lwip/sys.h"
45 
46 #ifdef __cplusplus
47 extern "C" {
48 #endif
49 
50 #ifndef LWIP_DEBUG_TIMERNAMES
51 #ifdef LWIP_DEBUG
52 #define LWIP_DEBUG_TIMERNAMES SYS_DEBUG
53 #else /* LWIP_DEBUG */
54 #define LWIP_DEBUG_TIMERNAMES 0
55 #endif /* LWIP_DEBUG*/
56 #endif
57 
58 /** Function prototype for a timeout callback function. Register such a function
59  * using sys_timeout().
60  *
61  * @param arg Additional argument to pass to the function - set up by sys_timeout()
62  */
63 typedef void (* sys_timeout_handler)(void *arg);
64 
65 struct sys_timeo {
66   struct sys_timeo *next;
67   u32_t time;
68   sys_timeout_handler h;
69   void *arg;
70 #if LWIP_DEBUG_TIMERNAMES
71   const char* handler_name;
72 #endif /* LWIP_DEBUG_TIMERNAMES */
73 };
74 
75 void sys_timeouts_init(void);
76 
77 #if LWIP_DEBUG_TIMERNAMES
78 void sys_timeout_debug(u32_t msecs, sys_timeout_handler handler, void *arg, const char* handler_name);
79 #define sys_timeout(msecs, handler, arg) sys_timeout_debug(msecs, handler, arg, #handler)
80 #else /* LWIP_DEBUG_TIMERNAMES */
81 void sys_timeout(u32_t msecs, sys_timeout_handler handler, void *arg);
82 #endif /* LWIP_DEBUG_TIMERNAMES */
83 
84 void sys_untimeout(sys_timeout_handler handler, void *arg);
85 #if NO_SYS
86 void sys_check_timeouts(void);
87 void sys_restart_timeouts(void);
88 #else /* NO_SYS */
89 void sys_timeouts_mbox_fetch(sys_mbox_t *mbox, void **msg);
90 #endif /* NO_SYS */
91 
92 
93 #ifdef __cplusplus
94 }
95 #endif
96 
97 #endif /* LWIP_TIMERS */
98 #endif /* __LWIP_TIMERS_H__ */
99