mqueue.h

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#ifndef __MQUEUE_H__
#define __MQUEUE_H__
 
#include <sys/types.h>
#include <time.h>
 
#include <common/list.h>
 
typedef uint32_t mqd_t;
 
struct mq_attr {
    int mq_flags;   /* Flags: 0 or O_NONBLOCK */
    int mq_maxmsg;  /* Max number of the messages in the queue */
    int mq_msgsize; /* Byte size of the message */
    int mq_curmsgs; /* Number of the messages currently in the queue */
};
 
int mq_getattr(mqd_t mqdes, struct mq_attr *attr);
 
int mq_setattr(mqd_t mqdes,
               const struct mq_attr *newattr,
               struct mq_attr *oldattr);
 
mqd_t mq_open(const char *name, int oflag, struct mq_attr *attr);
 
int mq_close(mqd_t mqdes);
 
int mq_unlink(const char *name);
 
ssize_t mq_receive(mqd_t mqdes,
                   char *msg_ptr,
                   size_t msg_len,
                   unsigned int *msg_prio);
 
int mq_send(mqd_t mqdes,
            const char *msg_ptr,
            size_t msg_len,
            unsigned int msg_prio);
 
int mq_timedsend(mqd_t mqdes,
                 const char *msg_ptr,
                 size_t msg_len,
                 unsigned int msg_prio,
                 const struct timespec *abs_timeout);
 
ssize_t mq_timedreceive(mqd_t mqdes,
                        char *msg_ptr,
                        size_t msg_len,
                        unsigned int *msg_prio,
                        const struct timespec *abs_timeout);
 
#endif