servers/inet/mq.c

   1 /*
   2 inet/mq.c
   3
   4 Created:        Jan 3, 1992 by Philip Homburg
   5
   6 Copyright 1995 Philip Homburg
   7 */
   8
   9 #include "inet.h"
  10 #include "mq.h"
  11 #include "generic/assert.h"
  12
  13 THIS_FILE
  14
  15 #define MQ_SIZE         128
  16
  17 PRIVATE mq_t mq_list[MQ_SIZE];
  18 PRIVATE mq_t *mq_freelist;
  19
  20 void mq_init()
  21 {
  22         int i;
  23
  24         mq_freelist= NULL;
  25         for (i= 0; i<MQ_SIZE; i++)
  26         {
  27                 mq_list[i].mq_next= mq_freelist;
  28                 mq_freelist= &mq_list[i];
  29                 mq_list[i].mq_allocated= 0;
  30         }
  31 }
  32
  33 mq_t *mq_get()
  34 {
  35         mq_t *mq;
  36
  37         mq= mq_freelist;
  38         assert(mq != NULL);
  39
  40         mq_freelist= mq->mq_next;
  41         mq->mq_next= NULL;
  42         assert(mq->mq_allocated == 0);
  43         mq->mq_allocated= 1;
  44         return mq;
  45 }
  46
  47 void mq_free(mq)
  48 mq_t *mq;
  49 {
  50         mq->mq_next= mq_freelist;
  51         mq_freelist= mq;
  52         assert(mq->mq_allocated == 1);
  53         mq->mq_allocated= 0;
  54 }
  55
  56 /*
  57  * $PchId: mq.c,v 1.7 1998/10/23 20:10:47 philip Exp $
  58  */