1 | /* |
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2 | * Convert POSIX Mutex ID to local object pointer |
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3 | * |
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4 | * COPYRIGHT (c) 1989-2007. |
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5 | * On-Line Applications Research Corporation (OAR). |
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6 | * |
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7 | * The license and distribution terms for this file may be |
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8 | * found in the file LICENSE in this distribution or at |
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9 | * http://www.rtems.com/license/LICENSE. |
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10 | * |
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11 | * $Id$ |
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12 | */ |
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13 | |
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14 | #if HAVE_CONFIG_H |
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15 | #include "config.h" |
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16 | #endif |
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17 | |
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18 | #include <errno.h> |
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19 | #include <pthread.h> |
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20 | |
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21 | #include <rtems/system.h> |
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22 | #include <rtems/score/coremutex.h> |
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23 | #if defined(RTEMS_MULTIPROCESSING) |
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24 | #include <rtems/score/mpci.h> |
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25 | #endif |
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26 | #include <rtems/posix/mutex.h> |
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27 | |
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28 | |
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29 | /* |
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30 | * _POSIX_Mutex_Get_support |
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31 | * |
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32 | * NOTE: The support macro makes it possible for both to use exactly |
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33 | * the same code to check for NULL id pointer and |
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34 | * PTHREAD_MUTEX_INITIALIZER without adding overhead. |
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35 | */ |
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36 | |
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37 | #define ___POSIX_Mutex_Get_support_error_check( _id, _location ) \ |
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38 | do { \ |
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39 | if ( !_id ) { \ |
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40 | *_location = OBJECTS_ERROR; \ |
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41 | return (POSIX_Mutex_Control *) 0; \ |
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42 | } \ |
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43 | } while (0) |
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44 | |
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45 | #define ___POSIX_Mutex_Get_support_auto_initialization( _id, _location ) \ |
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46 | do { \ |
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47 | int _status; \ |
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48 | \ |
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49 | if ( *_id == PTHREAD_MUTEX_INITIALIZER ) { \ |
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50 | /* \ |
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51 | * Do an "auto-create" here. \ |
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52 | */ \ |
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53 | \ |
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54 | _status = pthread_mutex_init( (pthread_mutex_t *)_id, 0 ); \ |
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55 | if ( _status ) { \ |
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56 | *_location = OBJECTS_ERROR; \ |
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57 | return (POSIX_Mutex_Control *) 0; \ |
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58 | } \ |
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59 | } \ |
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60 | } while (0) |
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61 | |
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62 | POSIX_Mutex_Control *_POSIX_Mutex_Get ( |
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63 | pthread_mutex_t *mutex, |
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64 | Objects_Locations *location |
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65 | ) |
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66 | { |
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67 | ___POSIX_Mutex_Get_support_error_check( mutex, location ); |
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68 | |
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69 | ___POSIX_Mutex_Get_support_auto_initialization( mutex, location ); |
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70 | |
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71 | return (POSIX_Mutex_Control *) |
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72 | _Objects_Get( &_POSIX_Mutex_Information, (Objects_Id) *mutex, location ); |
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73 | } |
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74 | |
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75 | POSIX_Mutex_Control *_POSIX_Mutex_Get_interrupt_disable ( |
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76 | pthread_mutex_t *mutex, |
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77 | Objects_Locations *location, |
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78 | ISR_Level *level |
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79 | ) |
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80 | { |
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81 | ___POSIX_Mutex_Get_support_error_check( mutex, location ); |
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82 | |
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83 | ___POSIX_Mutex_Get_support_auto_initialization( mutex, location ); |
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84 | |
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85 | return (POSIX_Mutex_Control *) _Objects_Get_isr_disable( |
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86 | &_POSIX_Mutex_Information, |
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87 | (Objects_Id) *mutex, |
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88 | location, |
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89 | level |
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90 | ); |
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91 | } |
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