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| -rw-r--r-- | cpukit/posix/include/rtems/posix/mqueue.h | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/cpukit/posix/include/rtems/posix/mqueue.h b/cpukit/posix/include/rtems/posix/mqueue.h new file mode 100644 index 0000000000..5d5cfee61b --- /dev/null +++ b/cpukit/posix/include/rtems/posix/mqueue.h @@ -0,0 +1,186 @@ +/* rtems/posix/mqueue.h + * + * This include file contains all the private support information for + * POSIX Message Queues. + * + * 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_MESSAGE_QUEUE_h +#define __RTEMS_POSIX_MESSAGE_QUEUE_h + +#ifdef __cplusplus +extern "C" { +#endif + +#include <rtems/score/coremsg.h> +#include <rtems/score/object.h> + +/* + * Data Structure used to manage a POSIX message queue + */ + +typedef struct { + Objects_Control Object; + int process_shared; + int flags; + boolean named; + boolean linked; + boolean blocking; + unsigned32 open_count; + CORE_message_queue_Control Message_queue; + struct sigevent notification; +} POSIX_Message_queue_Control; + +/* + * The following defines the information control block used to manage + * this class of objects. + */ + +EXTERN Objects_Information _POSIX_Message_queue_Information; + +/* + * _POSIX_Message_queue_Manager_initialization + * + * DESCRIPTION: + * + * This routine performs the initialization necessary for this manager. + */ + +void _POSIX_Message_queue_Manager_initialization( + unsigned32 maximum_message_queues +); + +/* + * + * _POSIX_Message_queue_Create_support + * + * DESCRIPTION: + * + * This routine performs the creation of a message queue utilizing the + * core message queue. + */ + +int _POSIX_Message_queue_Create_support( + const char *name, + int pshared, + unsigned int oflag, + struct mq_attr *attr, + POSIX_Message_queue_Control **message_queue +); + +/* + * + * _POSIX_Message_queue_Send_support + * + * DESCRIPTION: + * + * This routine posts a message to a specified message queue. + */ + +int _POSIX_Message_queue_Send_support( + mqd_t mqdes, + const char *msg_ptr, + unsigned32 msg_len, + Priority_Control msg_prio, + Watchdog_Interval timeout +); + +/* + * _POSIX_Message_queue_Allocate + * + * DESCRIPTION: + * + * This function allocates a message queue control block from + * the inactive chain of free message queue control blocks. + */ + +STATIC INLINE POSIX_Message_queue_Control *_POSIX_Message_queue_Allocate( void ); + +/* + * _POSIX_Message_queue_Free + * + * DESCRIPTION: + * + * This routine frees a message queue control block to the + * inactive chain of free message queue control blocks. + */ + +STATIC INLINE void _POSIX_Message_queue_Free ( + POSIX_Message_queue_Control *the_mq +); + +/* + * _POSIX_Message_queue_Get + * + * DESCRIPTION: + * + * This function maps message queue IDs to message queue control blocks. + * If ID corresponds to a local message queue, then it returns + * the_mq control pointer which maps to ID and location + * is set to OBJECTS_LOCAL. if the message queue ID is global and + * resides on a remote node, then location is set to OBJECTS_REMOTE, + * and the_message queue is undefined. Otherwise, location is set + * to OBJECTS_ERROR and the_mq is undefined. + */ + +STATIC INLINE POSIX_Message_queue_Control *_POSIX_Message_queue_Get ( + Objects_Id id, + Objects_Locations *location +); + +/* + * _POSIX_Message_queue_Is_null + * + * DESCRIPTION: + * + * This function returns TRUE if the_message_queue is NULL and FALSE otherwise. + */ + +STATIC INLINE boolean _POSIX_Message_queue_Is_null ( + POSIX_Message_queue_Control *the_mq +); + +/* + * _POSIX_Message_queue_Name_to_id + * + * DESCRIPTION: + * + * XXX + */ + +int _POSIX_Message_queue_Name_to_id( + const char *name, + Objects_Id *id +); + +/* + * _POSIX_Message_queue_Priority_to_core + * + * DESCRIPTION: + * + * XXX + */ + +STATIC INLINE Priority_Control _POSIX_Message_queue_Priority_to_core( + unsigned int priority +); + +#include <rtems/posix/mqueue.inl> +#include <rtems/posix/mqueuemp.h> + +#ifdef __cplusplus +} +#endif + +#endif +/* end of include file */ + |