source: rtems/c/src/exec/posix/headers/mutex.h @ 5e9b32b

4.104.114.84.95
Last change on this file since 5e9b32b was 5e9b32b, checked in by Joel Sherrill <joel.sherrill@…>, on 09/26/95 at 19:27:15

posix support initially added

  • Property mode set to 100644
File size: 2.5 KB
Line 
1/*  rtems/posix/mutex.h
2 *
3 *  This include file contains all the private support information for
4 *  POSIX mutex's.
5 *
6 *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
7 *  On-Line Applications Research Corporation (OAR).
8 *  All rights assigned to U.S. Government, 1994.
9 *
10 *  This material may be reproduced by or for the U.S. Government pursuant
11 *  to the copyright license under the clause at DFARS 252.227-7013.  This
12 *  notice must appear in all copies of this file and its derivatives.
13 *
14 *  $Id$
15 */
16 
17#ifndef __RTEMS_POSIX_MUTEX_h
18#define __RTEMS_POSIX_MUTEX_h
19 
20#ifdef __cplusplus
21extern "C" {
22#endif
23
24/*
25 *  Data Structure used to manage a POSIX mutex
26 */
27 
28typedef struct {
29   Objects_Control     Object;
30   int                 process_shared;
31   CORE_mutex_Control  Mutex;
32}  POSIX_Mutex_Control;
33
34/*
35 *  The following defines the information control block used to manage
36 *  this class of objects.
37 */
38 
39EXTERN Objects_Information  _POSIX_Mutex_Information;
40 
41/*
42 *  _POSIX_Mutex_Manager_initialization
43 *
44 *  DESCRIPTION:
45 *
46 *  This routine performs the initialization necessary for this manager.
47 */
48 
49void _POSIX_Mutex_Manager_initialization(
50  unsigned32 maximum_mutexes
51);
52 
53/*
54 *  _POSIX_Mutex_Allocate
55 *
56 *  DESCRIPTION:
57 *
58 *  This function allocates a mutexes control block from
59 *  the inactive chain of free mutexes control blocks.
60 */
61 
62STATIC INLINE POSIX_Mutex_Control *_POSIX_Mutex_Allocate( void );
63 
64/*
65 *  _POSIX_Mutex_Free
66 *
67 *  DESCRIPTION:
68 *
69 *  This routine frees a mutexes control block to the
70 *  inactive chain of free mutexes control blocks.
71 */
72 
73STATIC INLINE void _POSIX_Mutex_Free (
74  POSIX_Mutex_Control *the_mutex
75);
76 
77/*
78 *  _POSIX_Mutex_Get
79 *
80 *  DESCRIPTION:
81 *
82 *  This function maps mutexes IDs to mutexes control blocks.
83 *  If ID corresponds to a local mutexes, then it returns
84 *  the_mutex control pointer which maps to ID and location
85 *  is set to OBJECTS_LOCAL.  if the mutexes ID is global and
86 *  resides on a remote node, then location is set to OBJECTS_REMOTE,
87 *  and the_mutex is undefined.  Otherwise, location is set
88 *  to OBJECTS_ERROR and the_mutex is undefined.
89 */
90 
91STATIC INLINE POSIX_Mutex_Control *_POSIX_Mutex_Get (
92  Objects_Id        *id,
93  Objects_Locations *location
94);
95 
96/*
97 *  _POSIX_Mutex_Is_null
98 *
99 *  DESCRIPTION:
100 *
101 *  This function returns TRUE if the_mutex is NULL and FALSE otherwise.
102 */
103 
104STATIC INLINE boolean _POSIX_Mutex_Is_null (
105  POSIX_Mutex_Control *the_mutex
106);
107
108#include <rtems/posix/mutex.inl>
109#include <rtems/posix/mutexmp.h>
110
111#ifdef __cplusplus
112}
113#endif
114 
115#endif
116/*  end of include file */
117
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