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1 office 1 /**
2 * @file
3 * Functions to sync with TCPIP thread
4 */
5  
6 /*
7 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without modification,
11 * are permitted provided that the following conditions are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright notice,
14 * this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright notice,
16 * this list of conditions and the following disclaimer in the documentation
17 * and/or other materials provided with the distribution.
18 * 3. The name of the author may not be used to endorse or promote products
19 * derived from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
24 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
26 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
29 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
30 * OF SUCH DAMAGE.
31 *
32 * This file is part of the lwIP TCP/IP stack.
33 *
34 * Author: Adam Dunkels <adam@sics.se>
35 *
36 */
37 #ifndef LWIP_HDR_TCPIP_H
38 #define LWIP_HDR_TCPIP_H
39  
40 #include "lwip/opt.h"
41  
42 #if !NO_SYS /* don't build if not configured for use in lwipopts.h */
43  
44 #include "lwip/err.h"
45 #include "lwip/timeouts.h"
46 #include "lwip/netif.h"
47  
48 #ifdef __cplusplus
49 extern "C" {
50 #endif
51  
52 #if LWIP_TCPIP_CORE_LOCKING
53 /** The global semaphore to lock the stack. */
54 extern sys_mutex_t lock_tcpip_core;
55 /** Lock lwIP core mutex (needs @ref LWIP_TCPIP_CORE_LOCKING 1) */
56 #define LOCK_TCPIP_CORE() sys_mutex_lock(&lock_tcpip_core)
57 /** Unlock lwIP core mutex (needs @ref LWIP_TCPIP_CORE_LOCKING 1) */
58 #define UNLOCK_TCPIP_CORE() sys_mutex_unlock(&lock_tcpip_core)
59 #else /* LWIP_TCPIP_CORE_LOCKING */
60 #define LOCK_TCPIP_CORE()
61 #define UNLOCK_TCPIP_CORE()
62 #endif /* LWIP_TCPIP_CORE_LOCKING */
63  
64 struct pbuf;
65 struct netif;
66  
67 /** Function prototype for the init_done function passed to tcpip_init */
68 typedef void (*tcpip_init_done_fn)(void *arg);
69 /** Function prototype for functions passed to tcpip_callback() */
70 typedef void (*tcpip_callback_fn)(void *ctx);
71  
72 /* Forward declarations */
73 struct tcpip_callback_msg;
74  
75 void tcpip_init(tcpip_init_done_fn tcpip_init_done, void *arg);
76  
77 err_t tcpip_inpkt(struct pbuf *p, struct netif *inp, netif_input_fn input_fn);
78 err_t tcpip_input(struct pbuf *p, struct netif *inp);
79  
80 err_t tcpip_try_callback(tcpip_callback_fn function, void *ctx);
81 err_t tcpip_callback(tcpip_callback_fn function, void *ctx);
82 /** @ingroup lwip_os
83 * @deprecated use tcpip_try_callback() or tcpip_callback() instead
84 */
85 #define tcpip_callback_with_block(function, ctx, block) ((block != 0)? tcpip_callback(function, ctx) : tcpip_try_callback(function, ctx))
86  
87 struct tcpip_callback_msg* tcpip_callbackmsg_new(tcpip_callback_fn function, void *ctx);
88 void tcpip_callbackmsg_delete(struct tcpip_callback_msg* msg);
89 err_t tcpip_trycallback(struct tcpip_callback_msg* msg);
90  
91 /* free pbufs or heap memory from another context without blocking */
92 err_t pbuf_free_callback(struct pbuf *p);
93 err_t mem_free_callback(void *m);
94  
95 #if LWIP_TCPIP_TIMEOUT && LWIP_TIMERS
96 err_t tcpip_timeout(u32_t msecs, sys_timeout_handler h, void *arg);
97 err_t tcpip_untimeout(sys_timeout_handler h, void *arg);
98 #endif /* LWIP_TCPIP_TIMEOUT && LWIP_TIMERS */
99  
100 #ifdef TCPIP_THREAD_TEST
101 int tcpip_thread_poll_one(void);
102 #endif
103  
104 #ifdef __cplusplus
105 }
106 #endif
107  
108 #endif /* !NO_SYS */
109  
110 #endif /* LWIP_HDR_TCPIP_H */