[TCPIP]
[reactos.git] / reactos / lib / drivers / lwip / src / core / sys.c
1 /**
2 * @file
3 * lwIP Operating System abstraction
4 *
5 */
6
7 /*
8 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without modification,
12 * are permitted provided that the following conditions are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright notice,
15 * this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright notice,
17 * this list of conditions and the following disclaimer in the documentation
18 * and/or other materials provided with the distribution.
19 * 3. The name of the author may not be used to endorse or promote products
20 * derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
25 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
27 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
30 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
31 * OF SUCH DAMAGE.
32 *
33 * This file is part of the lwIP TCP/IP stack.
34 *
35 * Author: Adam Dunkels <adam@sics.se>
36 *
37 */
38
39 #include "lwip/opt.h"
40
41 #include "lwip/sys.h"
42
43 /* Most of the functions defined in sys.h must be implemented in the
44 * architecture-dependent file sys_arch.c */
45
46 #if !NO_SYS
47
48 /**
49 * Sleep for some ms. Timeouts are NOT processed while sleeping.
50 *
51 * @param ms number of milliseconds to sleep
52 */
53 void
54 sys_msleep(u32_t ms)
55 {
56 if (ms > 0) {
57 sys_sem_t delaysem;
58 err_t err = sys_sem_new(&delaysem, 0);
59 if (err == ERR_OK) {
60 sys_arch_sem_wait(&delaysem, ms);
61 sys_sem_free(&delaysem);
62 }
63 }
64 }
65
66 #endif /* !NO_SYS */