From 5e9b32b439627068a0292370fe595220dbfc95a0 Mon Sep 17 00:00:00 2001 From: Joel Sherrill Date: Tue, 26 Sep 1995 19:27:15 +0000 Subject: posix support initially added --- cpukit/posix/include/rtems/posix/mutex.h | 117 +++++++++++++++++++++++++++++++ 1 file changed, 117 insertions(+) create mode 100644 cpukit/posix/include/rtems/posix/mutex.h (limited to 'cpukit/posix/include/rtems/posix/mutex.h') diff --git a/cpukit/posix/include/rtems/posix/mutex.h b/cpukit/posix/include/rtems/posix/mutex.h new file mode 100644 index 0000000000..5639d908d2 --- /dev/null +++ b/cpukit/posix/include/rtems/posix/mutex.h @@ -0,0 +1,117 @@ +/* rtems/posix/mutex.h + * + * This include file contains all the private support information for + * POSIX mutex's. + * + * 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_MUTEX_h +#define __RTEMS_POSIX_MUTEX_h + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * Data Structure used to manage a POSIX mutex + */ + +typedef struct { + Objects_Control Object; + int process_shared; + CORE_mutex_Control Mutex; +} POSIX_Mutex_Control; + +/* + * The following defines the information control block used to manage + * this class of objects. + */ + +EXTERN Objects_Information _POSIX_Mutex_Information; + +/* + * _POSIX_Mutex_Manager_initialization + * + * DESCRIPTION: + * + * This routine performs the initialization necessary for this manager. + */ + +void _POSIX_Mutex_Manager_initialization( + unsigned32 maximum_mutexes +); + +/* + * _POSIX_Mutex_Allocate + * + * DESCRIPTION: + * + * This function allocates a mutexes control block from + * the inactive chain of free mutexes control blocks. + */ + +STATIC INLINE POSIX_Mutex_Control *_POSIX_Mutex_Allocate( void ); + +/* + * _POSIX_Mutex_Free + * + * DESCRIPTION: + * + * This routine frees a mutexes control block to the + * inactive chain of free mutexes control blocks. + */ + +STATIC INLINE void _POSIX_Mutex_Free ( + POSIX_Mutex_Control *the_mutex +); + +/* + * _POSIX_Mutex_Get + * + * DESCRIPTION: + * + * This function maps mutexes IDs to mutexes control blocks. + * If ID corresponds to a local mutexes, then it returns + * the_mutex control pointer which maps to ID and location + * is set to OBJECTS_LOCAL. if the mutexes ID is global and + * resides on a remote node, then location is set to OBJECTS_REMOTE, + * and the_mutex is undefined. Otherwise, location is set + * to OBJECTS_ERROR and the_mutex is undefined. + */ + +STATIC INLINE POSIX_Mutex_Control *_POSIX_Mutex_Get ( + Objects_Id *id, + Objects_Locations *location +); + +/* + * _POSIX_Mutex_Is_null + * + * DESCRIPTION: + * + * This function returns TRUE if the_mutex is NULL and FALSE otherwise. + */ + +STATIC INLINE boolean _POSIX_Mutex_Is_null ( + POSIX_Mutex_Control *the_mutex +); + +#include +#include + +#ifdef __cplusplus +} +#endif + +#endif +/* end of include file */ + -- cgit v1.2.3