1 | /** |
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2 | * @file rtems/posix/mutex.inl |
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3 | */ |
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4 | |
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5 | /* rtems/posix/mutex.inl |
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6 | * |
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7 | * This include file contains the macro implementation of the private |
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8 | * inlined routines for POSIX mutex's. |
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9 | * |
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10 | * COPYRIGHT (c) 1989-1999. |
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11 | * On-Line Applications Research Corporation (OAR). |
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12 | * |
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13 | * The license and distribution terms for this file may be |
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14 | * found in the file LICENSE in this distribution or at |
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15 | * http://www.rtems.com/license/LICENSE. |
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16 | * |
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17 | * $Id$ |
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18 | */ |
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19 | |
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20 | #ifndef __RTEMS_POSIX_MUTEX_inl |
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21 | #define __RTEMS_POSIX_MUTEX_inl |
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22 | |
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23 | /*PAGE |
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24 | * |
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25 | * _POSIX_Mutex_Allocate |
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26 | */ |
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27 | |
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28 | #define _POSIX_Mutex_Allocate() \ |
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29 | (POSIX_Mutex_Control *) _Objects_Allocate( &_POSIX_Mutex_Information ) |
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30 | |
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31 | /*PAGE |
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32 | * |
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33 | * _POSIX_Mutex_Free |
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34 | */ |
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35 | |
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36 | #define _POSIX_Mutex_Free( _the_mutex ) \ |
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37 | _Objects_Free( &_POSIX_Mutex_Information, &(_the_mutex)->Object ) |
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38 | |
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39 | /*PAGE |
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40 | * |
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41 | * _POSIX_Mutex_Get |
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42 | * |
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43 | * NOTE: The support macro makes it possible for both to use exactly |
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44 | * the same code to check for NULL id pointer and |
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45 | * PTHREAD_MUTEX_INITIALIZER without adding overhead. |
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46 | */ |
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47 | |
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48 | #define ___POSIX_Mutex_Get_support( _id, _location ) \ |
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49 | do { \ |
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50 | int _status; \ |
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51 | \ |
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52 | if ( !_id ) { \ |
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53 | *_location = OBJECTS_ERROR; \ |
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54 | return (POSIX_Mutex_Control *) 0; \ |
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55 | } \ |
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56 | \ |
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57 | if ( *_id == PTHREAD_MUTEX_INITIALIZER ) { \ |
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58 | /* \ |
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59 | * Do an "auto-create" here. \ |
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60 | */ \ |
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61 | \ |
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62 | _status = pthread_mutex_init( _id, 0 ); \ |
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63 | if ( _status ) { \ |
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64 | *_location = OBJECTS_ERROR; \ |
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65 | return (POSIX_Mutex_Control *) 0; \ |
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66 | } \ |
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67 | } \ |
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68 | } while (0) |
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69 | |
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70 | static POSIX_Mutex_Control * _POSIX_Mutex_Get( |
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71 | Objects_Id *id, |
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72 | Objects_Locations *location |
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73 | ) |
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74 | { |
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75 | ___POSIX_Mutex_Get_support( id, location ); |
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76 | |
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77 | return (POSIX_Mutex_Control *) |
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78 | _Objects_Get( &_POSIX_Mutex_Information, *id, location ); |
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79 | } |
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80 | |
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81 | static POSIX_Mutex_Control *_POSIX_Mutex_Get_interrupt_disable( |
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82 | Objects_Id *id, |
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83 | Objects_Locations *location, |
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84 | ISR_Level *level |
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85 | ) |
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86 | { |
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87 | ___POSIX_Mutex_Get_support( id, location ); |
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88 | |
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89 | return (POSIX_Mutex_Control *) |
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90 | _Objects_Get_isr_disable( &_POSIX_Mutex_Information, *id, location, level ); |
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91 | } |
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92 | |
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93 | |
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94 | /*PAGE |
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95 | * |
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96 | * _POSIX_Mutex_Is_null |
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97 | */ |
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98 | |
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99 | #define _POSIX_Mutex_Is_null( _the_mutex ) \ |
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100 | (!(_the_mutex)) |
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101 | |
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102 | #endif |
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103 | /* end of include file */ |
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104 | |
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