[5e9b32b] | 1 | /* rtems/posix/mutex.h |
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| 2 | * |
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| 3 | * This include file contains all the private support information for |
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| 4 | * POSIX mutex's. |
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| 5 | * |
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| 6 | * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. |
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| 7 | * On-Line Applications Research Corporation (OAR). |
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| 8 | * All rights assigned to U.S. Government, 1994. |
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| 9 | * |
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| 10 | * This material may be reproduced by or for the U.S. Government pursuant |
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| 11 | * to the copyright license under the clause at DFARS 252.227-7013. This |
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| 12 | * notice must appear in all copies of this file and its derivatives. |
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| 13 | * |
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| 14 | * $Id$ |
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| 15 | */ |
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| 16 | |
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| 17 | #ifndef __RTEMS_POSIX_MUTEX_h |
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| 18 | #define __RTEMS_POSIX_MUTEX_h |
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| 19 | |
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| 20 | #ifdef __cplusplus |
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| 21 | extern "C" { |
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| 22 | #endif |
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| 23 | |
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| 24 | /* |
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| 25 | * Data Structure used to manage a POSIX mutex |
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| 26 | */ |
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| 27 | |
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| 28 | typedef struct { |
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| 29 | Objects_Control Object; |
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| 30 | int process_shared; |
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| 31 | CORE_mutex_Control Mutex; |
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| 32 | } POSIX_Mutex_Control; |
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| 33 | |
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| 34 | /* |
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| 35 | * The following defines the information control block used to manage |
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| 36 | * this class of objects. |
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| 37 | */ |
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| 38 | |
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| 39 | EXTERN Objects_Information _POSIX_Mutex_Information; |
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| 40 | |
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| 41 | /* |
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| 42 | * _POSIX_Mutex_Manager_initialization |
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| 43 | * |
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| 44 | * DESCRIPTION: |
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| 45 | * |
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| 46 | * This routine performs the initialization necessary for this manager. |
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| 47 | */ |
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| 48 | |
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| 49 | void _POSIX_Mutex_Manager_initialization( |
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| 50 | unsigned32 maximum_mutexes |
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| 51 | ); |
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| 52 | |
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| 53 | /* |
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| 54 | * _POSIX_Mutex_Allocate |
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| 55 | * |
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| 56 | * DESCRIPTION: |
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| 57 | * |
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| 58 | * This function allocates a mutexes control block from |
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| 59 | * the inactive chain of free mutexes control blocks. |
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| 60 | */ |
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| 61 | |
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| 62 | STATIC INLINE POSIX_Mutex_Control *_POSIX_Mutex_Allocate( void ); |
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| 63 | |
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| 64 | /* |
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| 65 | * _POSIX_Mutex_Free |
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| 66 | * |
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| 67 | * DESCRIPTION: |
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| 68 | * |
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| 69 | * This routine frees a mutexes control block to the |
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| 70 | * inactive chain of free mutexes control blocks. |
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| 71 | */ |
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| 72 | |
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| 73 | STATIC INLINE void _POSIX_Mutex_Free ( |
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| 74 | POSIX_Mutex_Control *the_mutex |
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| 75 | ); |
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| 76 | |
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| 77 | /* |
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| 78 | * _POSIX_Mutex_Get |
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| 79 | * |
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| 80 | * DESCRIPTION: |
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| 81 | * |
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| 82 | * This function maps mutexes IDs to mutexes control blocks. |
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| 83 | * If ID corresponds to a local mutexes, then it returns |
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| 84 | * the_mutex control pointer which maps to ID and location |
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| 85 | * is set to OBJECTS_LOCAL. if the mutexes ID is global and |
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| 86 | * resides on a remote node, then location is set to OBJECTS_REMOTE, |
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| 87 | * and the_mutex is undefined. Otherwise, location is set |
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| 88 | * to OBJECTS_ERROR and the_mutex is undefined. |
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| 89 | */ |
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| 90 | |
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| 91 | STATIC INLINE POSIX_Mutex_Control *_POSIX_Mutex_Get ( |
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| 92 | Objects_Id *id, |
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| 93 | Objects_Locations *location |
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| 94 | ); |
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| 95 | |
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| 96 | /* |
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| 97 | * _POSIX_Mutex_Is_null |
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| 98 | * |
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| 99 | * DESCRIPTION: |
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| 100 | * |
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| 101 | * This function returns TRUE if the_mutex is NULL and FALSE otherwise. |
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| 102 | */ |
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| 103 | |
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| 104 | STATIC INLINE boolean _POSIX_Mutex_Is_null ( |
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| 105 | POSIX_Mutex_Control *the_mutex |
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| 106 | ); |
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| 107 | |
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| 108 | #include <rtems/posix/mutex.inl> |
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| 109 | #include <rtems/posix/mutexmp.h> |
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| 110 | |
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| 111 | #ifdef __cplusplus |
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| 112 | } |
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| 113 | #endif |
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| 114 | |
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| 115 | #endif |
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| 116 | /* end of include file */ |
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| 117 | |
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