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[/] [or1k/] [trunk/] [rtems-20020807/] [cpukit/] [posix/] [include/] [mqueue.h] - Rev 1765
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/* mqueue.h * * mqueue.h,v 1.4 1999/04/26 18:22:08 joel Exp */ #ifndef __POSIX_MESSAGE_QUEUE_h #define __POSIX_MESSAGE_QUEUE_h #ifdef __cplusplus extern "C" { #endif #include <sys/features.h> #if defined(_POSIX_MESSAGE_PASSING) #include <sys/types.h> #include <rtems/system.h> #include <rtems/score/object.h> /* * 15.1.1 Data Structures, P1003.1b-1993, p. 271 */ typedef Objects_Id mqd_t; struct mq_attr { long mq_flags; /* Message queue flags */ long mq_maxmsg; /* Maximum number of messages */ long mq_msgsize; /* Maximum message size */ long mq_curmsgs; /* Number of messages currently queued */ }; /* * 15.2.2 Open a Message Queue, P1003.1b-1993, p. 272 */ mqd_t mq_open( const char *name, int oflag, ... ); /* * 15.2.2 Close a Message Queue, P1003.1b-1993, p. 275 */ int mq_close( mqd_t mqdes ); /* * 15.2.2 Remove a Message Queue, P1003.1b-1993, p. 276 */ int mq_unlink( const char *name ); /* * 15.2.4 Send a Message to a Message Queue, P1003.1b-1993, p. 277 * * NOTE: P1003.4b/D8, p. 45 adds mq_timedsend(). */ int mq_send( mqd_t mqdes, const char *msg_ptr, size_t msg_len, unsigned int msg_prio ); #if defined(_POSIX_TIMEOUTS) #include <time.h> int mq_timedsend( mqd_t mqdes, const char *msg_ptr, size_t msg_len, unsigned int msg_prio, const struct timespec *timeout ); #endif /* _POSIX_TIMEOUTS */ /* * 15.2.5 Receive a Message From a Message Queue, P1003.1b-1993, p. 279 * * NOTE: P1003.4b/D8, p. 45 adds mq_timedreceive(). */ ssize_t mq_receive( mqd_t mqdes, char *msg_ptr, size_t msg_len, unsigned int *msg_prio ); #if defined(_POSIX_TIMEOUTS) int mq_timedreceive( /* XXX: should this be ssize_t */ mqd_t mqdes, char *msg_ptr, size_t msg_len, unsigned int *msg_prio, const struct timespec *timeout ); #endif /* _POSIX_TIMEOUTS */ #if defined(_POSIX_REALTIME_SIGNALS) /* * 15.2.6 Notify Process that a Message is Available on a Queue, * P1003.1b-1993, p. 280 */ int mq_notify( mqd_t mqdes, const struct sigevent *notification ); #endif /* _POSIX_REALTIME_SIGNALS */ /* * 15.2.7 Set Message Queue Attributes, P1003.1b-1993, p. 281 */ int mq_setattr( mqd_t mqdes, const struct mq_attr *mqstat, struct mq_attr *omqstat ); /* * 15.2.8 Get Message Queue Attributes, P1003.1b-1993, p. 283 */ int mq_getattr( mqd_t mqdes, struct mq_attr *mqstat ); #endif /* _POSIX_MESSAGE_PASSING */ #ifdef __cplusplus } #endif #endif /* end of include file */