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/*  rtems/posix/semaphore.h
 *
 *  This include file contains all the private support information for
 *  POSIX Semaphores.
 *
 *  COPYRIGHT (c) 1989-1999.
 *  On-Line Applications Research Corporation (OAR).
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.OARcorp.com/rtems/license.html.
 *
 *  $Id: semaphore.h,v 1.2 2001-09-27 11:59:14 chris Exp $
 */
 
#ifndef __RTEMS_POSIX_SEMAPHORE_h
#define __RTEMS_POSIX_SEMAPHORE_h
 
#ifdef __cplusplus
extern "C" {
#endif
 
#include <semaphore.h>
#include <rtems/score/coresem.h>
 
#define SEM_FAILED (sem_t *) -1
 
/*
 *  Data Structure used to manage a POSIX semaphore
 */
 
typedef struct {
   Objects_Control         Object;
   int                     process_shared;
   boolean                 named;
   boolean                 linked;
   unsigned32              open_count;
   CORE_semaphore_Control  Semaphore;
}  POSIX_Semaphore_Control;
 
/*
 *  The following defines the information control block used to manage
 *  this class of objects.
 */
 
POSIX_EXTERN Objects_Information  _POSIX_Semaphore_Information;
 
/*
 *  _POSIX_Semaphore_Manager_initialization
 *
 *  DESCRIPTION:
 *
 *  This routine performs the initialization necessary for this manager.
 */
 
void _POSIX_Semaphore_Manager_initialization(
  unsigned32 maximum_semaphorees
);
 
/*
 *  _POSIX_Semaphore_Allocate
 *
 *  DESCRIPTION:
 *
 *  This function allocates a semaphore control block from
 *  the inactive chain of free semaphore control blocks.
 */
 
RTEMS_INLINE_ROUTINE POSIX_Semaphore_Control *_POSIX_Semaphore_Allocate( void );
 
/*
 *  _POSIX_Semaphore_Free
 *
 *  DESCRIPTION:
 *
 *  This routine frees a semaphore control block to the
 *  inactive chain of free semaphore control blocks.
 */
 
RTEMS_INLINE_ROUTINE void _POSIX_Semaphore_Free (
  POSIX_Semaphore_Control *the_semaphore
);
 
/*
 *  _POSIX_Semaphore_Get
 *
 *  DESCRIPTION:
 *
 *  This function maps semaphore IDs to semaphore control blocks.
 *  If ID corresponds to a local semaphore, then it returns
 *  the_semaphore control pointer which maps to ID and location
 *  is set to OBJECTS_LOCAL.  if the semaphore ID is global and
 *  resides on a remote node, then location is set to OBJECTS_REMOTE,
 *  and the_semaphore is undefined.  Otherwise, location is set
 *  to OBJECTS_ERROR and the_semaphore is undefined.
 */
 
RTEMS_INLINE_ROUTINE POSIX_Semaphore_Control *_POSIX_Semaphore_Get (
  Objects_Id        *id,
  Objects_Locations *location
);
 
/*
 *  _POSIX_Semaphore_Is_null
 *
 *  DESCRIPTION:
 *
 *  This function returns TRUE if the_semaphore is NULL and FALSE otherwise.
 */
 
RTEMS_INLINE_ROUTINE boolean _POSIX_Semaphore_Is_null (
  POSIX_Semaphore_Control *the_semaphore
);
 
/*
 *  _POSIX_Semaphore_Create_support
 *
 *  DESCRIPTION:
 *
 *  This routine supports the sem_init and sem_open routines.
 */
 
int _POSIX_Semaphore_Create_support(
  const char                *name,
  int                        pshared,
  unsigned int               value,
  POSIX_Semaphore_Control  **the_sem
);
 
/*
 *  _POSIX_Semaphore_Delete
 *
 *  DESCRIPTION:
 *
 *  This routine supports the sem_close and sem_unlink routines.
 */
 
void _POSIX_Semaphore_Delete(
  POSIX_Semaphore_Control *the_semaphore
);
 
/*
 *  _POSIX_Semaphore_Wait_support
 *
 *  DESCRIPTION:
 *
 *  This routine supports the sem_wait, sem_trywait, and sem_timedwait
 *  services.
 */
 
int _POSIX_Semaphore_Wait_support(
  sem_t              *sem,
  boolean             blocking,
  Watchdog_Interval   timeout
);
 
/*
 *  _POSIX_Semaphore_Name_to_id
 *
 *  DESCRIPTION:
 *
 *  This routine performs name to id translation.
 */
 
int _POSIX_Semaphore_Name_to_id(
  const char          *name,
  Objects_Id          *id
);
 
#include <rtems/posix/semaphore.inl>
#if defined(RTEMS_MULTIPROCESSING)
#include <rtems/posix/semaphoremp.h>
#endif
 
#ifdef __cplusplus
}
#endif
 
#endif
/*  end of include file */
 

Line No.	Rev	Author	Line
1	30	unneback	`/* rtems/posix/semaphore.h`
2			`*`
3			`* This include file contains all the private support information for`
4			`* POSIX Semaphores.`
5			`*`
6			`* COPYRIGHT (c) 1989-1999.`
7			`* On-Line Applications Research Corporation (OAR).`
8			`*`
9			`* The license and distribution terms for this file may be`
10			`* found in the file LICENSE in this distribution or at`
11			`* http://www.OARcorp.com/rtems/license.html.`
12			`*`
13			`* $Id: semaphore.h,v 1.2 2001-09-27 11:59:14 chris Exp $`
14			`*/`
15
16			`#ifndef __RTEMS_POSIX_SEMAPHORE_h`
17			`#define __RTEMS_POSIX_SEMAPHORE_h`
18
19			`#ifdef __cplusplus`
20			`extern "C" {`
21			`#endif`
22
23			`#include <semaphore.h>`
24			`#include <rtems/score/coresem.h>`
25
26			`#define SEM_FAILED (sem_t *) -1`
27
28			`/*`
29			`* Data Structure used to manage a POSIX semaphore`
30			`*/`
31
32			`typedef struct {`
33			`Objects_Control Object;`
34			`int process_shared;`
35			`boolean named;`
36			`boolean linked;`
37			`unsigned32 open_count;`
38			`CORE_semaphore_Control Semaphore;`
39			`} POSIX_Semaphore_Control;`
40
41			`/*`
42			`* The following defines the information control block used to manage`
43			`* this class of objects.`
44			`*/`
45
46			`POSIX_EXTERN Objects_Information _POSIX_Semaphore_Information;`
47
48			`/*`
49			`* _POSIX_Semaphore_Manager_initialization`
50			`*`
51			`* DESCRIPTION:`
52			`*`
53			`* This routine performs the initialization necessary for this manager.`
54			`*/`
55
56			`void _POSIX_Semaphore_Manager_initialization(`
57			`unsigned32 maximum_semaphorees`
58			`);`
59
60			`/*`
61			`* _POSIX_Semaphore_Allocate`
62			`*`
63			`* DESCRIPTION:`
64			`*`
65			`* This function allocates a semaphore control block from`
66			`* the inactive chain of free semaphore control blocks.`
67			`*/`
68
69			`RTEMS_INLINE_ROUTINE POSIX_Semaphore_Control *_POSIX_Semaphore_Allocate( void );`
70
71			`/*`
72			`* _POSIX_Semaphore_Free`
73			`*`
74			`* DESCRIPTION:`
75			`*`
76			`* This routine frees a semaphore control block to the`
77			`* inactive chain of free semaphore control blocks.`
78			`*/`
79
80			`RTEMS_INLINE_ROUTINE void _POSIX_Semaphore_Free (`
81			`POSIX_Semaphore_Control *the_semaphore`
82			`);`
83
84			`/*`
85			`* _POSIX_Semaphore_Get`
86			`*`
87			`* DESCRIPTION:`
88			`*`
89			`* This function maps semaphore IDs to semaphore control blocks.`
90			`* If ID corresponds to a local semaphore, then it returns`
91			`* the_semaphore control pointer which maps to ID and location`
92			`* is set to OBJECTS_LOCAL. if the semaphore ID is global and`
93			`* resides on a remote node, then location is set to OBJECTS_REMOTE,`
94			`* and the_semaphore is undefined. Otherwise, location is set`
95			`* to OBJECTS_ERROR and the_semaphore is undefined.`
96			`*/`
97
98			`RTEMS_INLINE_ROUTINE POSIX_Semaphore_Control *_POSIX_Semaphore_Get (`
99			`Objects_Id *id,`
100			`Objects_Locations *location`
101			`);`
102
103			`/*`
104			`* _POSIX_Semaphore_Is_null`
105			`*`
106			`* DESCRIPTION:`
107			`*`
108			`* This function returns TRUE if the_semaphore is NULL and FALSE otherwise.`
109			`*/`
110
111			`RTEMS_INLINE_ROUTINE boolean _POSIX_Semaphore_Is_null (`
112			`POSIX_Semaphore_Control *the_semaphore`
113			`);`
114
115			`/*`
116			`* _POSIX_Semaphore_Create_support`
117			`*`
118			`* DESCRIPTION:`
119			`*`
120			`* This routine supports the sem_init and sem_open routines.`
121			`*/`
122
123			`int _POSIX_Semaphore_Create_support(`
124			`const char *name,`
125			`int pshared,`
126			`unsigned int value,`
127			`POSIX_Semaphore_Control **the_sem`
128			`);`
129
130			`/*`
131			`* _POSIX_Semaphore_Delete`
132			`*`
133			`* DESCRIPTION:`
134			`*`
135			`* This routine supports the sem_close and sem_unlink routines.`
136			`*/`
137
138			`void _POSIX_Semaphore_Delete(`
139			`POSIX_Semaphore_Control *the_semaphore`
140			`);`
141
142			`/*`
143			`* _POSIX_Semaphore_Wait_support`
144			`*`
145			`* DESCRIPTION:`
146			`*`
147			`* This routine supports the sem_wait, sem_trywait, and sem_timedwait`
148			`* services.`
149			`*/`
150
151			`int _POSIX_Semaphore_Wait_support(`
152			`sem_t *sem,`
153			`boolean blocking,`
154			`Watchdog_Interval timeout`
155			`);`
156
157			`/*`
158			`* _POSIX_Semaphore_Name_to_id`
159			`*`
160			`* DESCRIPTION:`
161			`*`
162			`* This routine performs name to id translation.`
163			`*/`
164
165			`int _POSIX_Semaphore_Name_to_id(`
166			`const char *name,`
167			`Objects_Id *id`
168			`);`
169
170			`#include <rtems/posix/semaphore.inl>`
171			`#if defined(RTEMS_MULTIPROCESSING)`
172			`#include <rtems/posix/semaphoremp.h>`
173			`#endif`
174
175			`#ifdef __cplusplus`
176			`}`
177			`#endif`
178
179			`#endif`
180			`/* end of include file */`
181

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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [posix/] [include/] [rtems/] [posix/] [semaphore.h] - Blame information for rev 593