1 | /** |
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2 | * @file rtems/posix/cond.inl |
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3 | */ |
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4 | |
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5 | /* rtems/posix/cond.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 condition variables. |
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9 | * |
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10 | * COPYRIGHT (c) 1989-2002. |
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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_CONDITION_VARIABLES_inl |
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21 | #define __RTEMS_POSIX_CONDITION_VARIABLES_inl |
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22 | |
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23 | #include <pthread.h> |
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24 | |
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25 | /*PAGE |
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26 | * |
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27 | * _POSIX_Condition_variables_Allocate |
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28 | */ |
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29 | |
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30 | #define _POSIX_Condition_variables_Allocate() \ |
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31 | (POSIX_Condition_variables_Control *) \ |
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32 | _Objects_Allocate( &_POSIX_Condition_variables_Information ) |
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33 | |
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34 | /*PAGE |
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35 | * |
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36 | * _POSIX_Condition_variables_Free |
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37 | * |
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38 | * NOTE: The support macro makes it possible for both to use exactly |
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39 | * the same code to check for NULL id pointer and |
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40 | * PTHREAD_COND_INITIALIZER without adding overhead. |
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41 | */ |
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42 | |
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43 | #define _POSIX_Condition_variables_Free( _the_condition_variable ) \ |
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44 | _Objects_Free( &_POSIX_Condition_variables_Information, \ |
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45 | &(_the_condition_variable)->Object) |
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46 | |
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47 | /*PAGE |
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48 | * |
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49 | * _POSIX_Condition_variables_Get |
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50 | * |
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51 | * NOTE: The support macro makes it possible for both to use exactly |
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52 | * the same code to check for NULL id pointer and |
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53 | * PTHREAD_COND_INITIALIZER without adding overhead. |
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54 | */ |
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55 | |
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56 | #define ___POSIX_Condition_variables_Get_support( _id, _location ) \ |
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57 | do { \ |
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58 | int _status; \ |
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59 | \ |
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60 | if ( !_id ) { \ |
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61 | *_location = OBJECTS_ERROR; \ |
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62 | return (POSIX_Condition_variables_Control *) 0; \ |
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63 | } \ |
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64 | \ |
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65 | if ( *_id == PTHREAD_COND_INITIALIZER ) { \ |
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66 | /* \ |
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67 | * Do an "auto-create" here. \ |
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68 | */ \ |
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69 | \ |
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70 | _status = pthread_cond_init( _id, 0 ); \ |
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71 | if ( _status ) { \ |
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72 | *_location = OBJECTS_ERROR; \ |
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73 | return (POSIX_Condition_variables_Control *) 0; \ |
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74 | } \ |
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75 | } \ |
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76 | } while (0) |
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77 | |
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78 | |
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79 | static POSIX_Condition_variables_Control *_POSIX_Condition_variables_Get ( |
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80 | Objects_Id *id, |
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81 | Objects_Locations *location |
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82 | ) |
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83 | { |
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84 | ___POSIX_Condition_variables_Get_support( id, location ); |
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85 | |
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86 | return (POSIX_Condition_variables_Control *) |
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87 | _Objects_Get( &_POSIX_Condition_variables_Information, *id, location ); |
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88 | } |
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89 | |
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90 | /*PAGE |
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91 | * |
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92 | * _POSIX_Condition_variables_Is_null |
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93 | */ |
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94 | |
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95 | #define _POSIX_Condition_variables_Is_null( _the_condition_variable ) \ |
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96 | (!(_the_condition_variable)) |
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97 | |
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98 | #endif |
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99 | /* end of include file */ |
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