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Diffstat (limited to '')
-rw-r--r-- | cpukit/posix/include/rtems/posix/semaphore.h | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/cpukit/posix/include/rtems/posix/semaphore.h b/cpukit/posix/include/rtems/posix/semaphore.h new file mode 100644 index 0000000000..a538663989 --- /dev/null +++ b/cpukit/posix/include/rtems/posix/semaphore.h @@ -0,0 +1,135 @@ +/* rtems/posix/semaphore.h + * + * This include file contains all the private support information for + * POSIX Semaphores. + * + * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. + * On-Line Applications Research Corporation (OAR). + * All rights assigned to U.S. Government, 1994. + * + * This material may be reproduced by or for the U.S. Government pursuant + * to the copyright license under the clause at DFARS 252.227-7013. This + * notice must appear in all copies of this file and its derivatives. + * + * $Id$ + */ + +#ifndef __RTEMS_POSIX_SEMAPHORE_h +#define __RTEMS_POSIX_SEMAPHORE_h + +#ifdef __cplusplus +extern "C" { +#endif + +#include <rtems/score/coresem.h> + +/* + * 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. + */ + +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. + */ + +STATIC INLINE 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. + */ + +STATIC INLINE 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. + */ + +STATIC INLINE 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. + */ + +STATIC INLINE boolean _POSIX_Semaphore_Is_null ( + POSIX_Semaphore_Control *the_semaphore +); + +/* + * _POSIX_Semaphore_Name_to_id + * + * DESCRIPTION: + * + * XXX + */ + +int _POSIX_Semaphore_Name_to_id( + const char *name, + Objects_Id *id +); + +#include <rtems/posix/semaphore.inl> +#include <rtems/posix/semaphoremp.h> + +#ifdef __cplusplus +} +#endif + +#endif +/* end of include file */ + |