insque(3C)                     DG/UX R4.11MU05                    insque(3C)


NAME
       insque, remque - insert/remove element from a queue

SYNOPSIS
       include <search.h>

       void insque(struct qelem *elem, struct qelem *pred);

       void remque(struct qelem *elem);

DESCRIPTION
       insque and remque manipulate queues built from doubly linked lists.
       Each element in the queue must be in the following form:
              struct qelem {
                   struct    qelem *qforw;
                   struct    qelem *qback;
                   char qdata[];
              };

       insque inserts elem in a queue immediately after pred.  remque
       removes an entry elem from a queue.


   Considerations for Threads Programming
                     +---------+-----------------------------+
                     |         |                      async- |
                     |function | reentrant   cancel   cancel |
                     |         |             point     safe  |
                     +---------+-----------------------------+
                     |insque   |     Y         N        N    |
                     |remque   |     Y         N        N    |
                     +---------+-----------------------------+


SEE ALSO
       reentrant(3).


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