1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief Convert POSIX Mutex ID to local object pointer |
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5 | * @ingroup POSIXAPI |
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6 | */ |
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7 | |
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8 | /* |
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9 | * COPYRIGHT (c) 1989-2007. |
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10 | * On-Line Applications Research Corporation (OAR). |
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11 | * |
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12 | * The license and distribution terms for this file may be |
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13 | * found in the file LICENSE in this distribution or at |
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14 | * http://www.rtems.org/license/LICENSE. |
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15 | */ |
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16 | |
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17 | #if HAVE_CONFIG_H |
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18 | #include "config.h" |
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19 | #endif |
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20 | |
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21 | #include <rtems/posix/muteximpl.h> |
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22 | #include <rtems/score/apimutex.h> |
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23 | |
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24 | static bool _POSIX_Mutex_Check_id_and_auto_init( |
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25 | pthread_mutex_t *mutex, |
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26 | Objects_Locations *location |
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27 | ) |
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28 | { |
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29 | if ( mutex == NULL ) { |
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30 | *location = OBJECTS_ERROR; |
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31 | |
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32 | return false; |
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33 | } |
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34 | |
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35 | if ( *mutex == PTHREAD_MUTEX_INITIALIZER ) { |
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36 | int eno; |
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37 | |
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38 | _Once_Lock(); |
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39 | |
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40 | if ( *mutex == PTHREAD_MUTEX_INITIALIZER ) { |
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41 | eno = pthread_mutex_init( mutex, NULL ); |
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42 | } else { |
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43 | eno = 0; |
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44 | } |
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45 | |
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46 | _Once_Unlock(); |
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47 | |
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48 | if ( eno != 0 ) { |
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49 | *location = OBJECTS_ERROR; |
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50 | |
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51 | return false; |
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52 | } |
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53 | } |
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54 | |
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55 | return true; |
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56 | } |
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57 | |
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58 | POSIX_Mutex_Control *_POSIX_Mutex_Get ( |
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59 | pthread_mutex_t *mutex, |
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60 | Objects_Locations *location |
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61 | ) |
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62 | { |
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63 | if ( !_POSIX_Mutex_Check_id_and_auto_init( mutex, location ) ) { |
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64 | return NULL; |
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65 | } |
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66 | |
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67 | return (POSIX_Mutex_Control *) |
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68 | _Objects_Get( &_POSIX_Mutex_Information, (Objects_Id) *mutex, location ); |
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69 | } |
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70 | |
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71 | POSIX_Mutex_Control *_POSIX_Mutex_Get_interrupt_disable ( |
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72 | pthread_mutex_t *mutex, |
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73 | Objects_Locations *location, |
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74 | ISR_lock_Context *lock_context |
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75 | ) |
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76 | { |
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77 | if ( !_POSIX_Mutex_Check_id_and_auto_init( mutex, location ) ) { |
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78 | return NULL; |
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79 | } |
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80 | |
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81 | return (POSIX_Mutex_Control *) _Objects_Get_isr_disable( |
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82 | &_POSIX_Mutex_Information, |
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83 | (Objects_Id) *mutex, |
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84 | location, |
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85 | lock_context |
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86 | ); |
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87 | } |
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