BadVPN – Blame information for rev 1
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1 | office | 1 | /** |
2 | * @file |
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3 | * lwIP Operating System abstraction |
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4 | * |
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5 | */ |
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6 | |||
7 | /* |
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8 | * Copyright (c) 2001-2004 Swedish Institute of Computer Science. |
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9 | * All rights reserved. |
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10 | * |
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11 | * Redistribution and use in source and binary forms, with or without modification, |
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12 | * are permitted provided that the following conditions are met: |
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13 | * |
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14 | * 1. Redistributions of source code must retain the above copyright notice, |
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15 | * this list of conditions and the following disclaimer. |
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16 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
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17 | * this list of conditions and the following disclaimer in the documentation |
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18 | * and/or other materials provided with the distribution. |
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19 | * 3. The name of the author may not be used to endorse or promote products |
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20 | * derived from this software without specific prior written permission. |
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21 | * |
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22 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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23 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
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24 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT |
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25 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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26 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
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27 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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28 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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29 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
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30 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY |
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31 | * OF SUCH DAMAGE. |
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32 | * |
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33 | * This file is part of the lwIP TCP/IP stack. |
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34 | * |
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35 | * Author: Adam Dunkels <adam@sics.se> |
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36 | * |
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37 | */ |
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38 | |||
39 | /** |
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40 | * @defgroup sys_layer Porting (system abstraction layer) |
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41 | * @ingroup lwip |
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42 | * @verbinclude "sys_arch.txt" |
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43 | * |
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44 | * @defgroup sys_os OS abstraction layer |
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45 | * @ingroup sys_layer |
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46 | * No need to implement functions in this section in NO_SYS mode. |
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47 | * |
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48 | * @defgroup sys_sem Semaphores |
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49 | * @ingroup sys_os |
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50 | * |
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51 | * @defgroup sys_mutex Mutexes |
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52 | * @ingroup sys_os |
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53 | * Mutexes are recommended to correctly handle priority inversion, |
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54 | * especially if you use LWIP_CORE_LOCKING . |
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55 | * |
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56 | * @defgroup sys_mbox Mailboxes |
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57 | * @ingroup sys_os |
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58 | * |
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59 | * @defgroup sys_time Time |
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60 | * @ingroup sys_layer |
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61 | * |
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62 | * @defgroup sys_prot Critical sections |
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63 | * @ingroup sys_layer |
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64 | * Used to protect short regions of code against concurrent access. |
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65 | * - Your system is a bare-metal system (probably with an RTOS) |
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66 | * and interrupts are under your control: |
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67 | * Implement this as LockInterrupts() / UnlockInterrupts() |
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68 | * - Your system uses an RTOS with deferred interrupt handling from a |
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69 | * worker thread: Implement as a global mutex or lock/unlock scheduler |
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70 | * - Your system uses a high-level OS with e.g. POSIX signals: |
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71 | * Implement as a global mutex |
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72 | * |
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73 | * @defgroup sys_misc Misc |
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74 | * @ingroup sys_os |
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75 | */ |
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76 | |||
77 | #include "lwip/opt.h" |
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78 | |||
79 | #include "lwip/sys.h" |
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80 | |||
81 | /* Most of the functions defined in sys.h must be implemented in the |
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82 | * architecture-dependent file sys_arch.c */ |
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83 | |||
84 | #if !NO_SYS |
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85 | |||
86 | #ifndef sys_msleep |
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87 | /** |
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88 | * Sleep for some ms. Timeouts are NOT processed while sleeping. |
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89 | * |
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90 | * @param ms number of milliseconds to sleep |
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91 | */ |
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92 | void |
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93 | sys_msleep(u32_t ms) |
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94 | { |
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95 | if (ms > 0) { |
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96 | sys_sem_t delaysem; |
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97 | err_t err = sys_sem_new(&delaysem, 0); |
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98 | if (err == ERR_OK) { |
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99 | sys_arch_sem_wait(&delaysem, ms); |
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100 | sys_sem_free(&delaysem); |
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101 | } |
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102 | } |
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103 | } |
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104 | #endif /* sys_msleep */ |
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105 | |||
106 | #endif /* !NO_SYS */ |