src/libs/compat/freebsd_network/Unit.cpp

   1 /*
   2  * Copyright 2009 Colin Günther, coling@gmx.de
   3  * All Rights Reserved. Distributed under the terms of the MIT License.
   4  *
   5  */
   6
   7
   8 /*! Wrapper functions for accessing the number buffer.*/
   9
  10
  11 #include "unit.h"
  12
  13 #include <util/RadixBitmap.h>
  14
  15
  16 #define ID_STORE_FULL -1
  17
  18
  19 status_t
  20 _new_unrhdr_buffer(struct unrhdr* idStore, uint32 maxIdCount)
  21 {
  22         status_t status = B_OK;
  23
  24         idStore->idBuffer = radix_bitmap_create(maxIdCount);
  25         if (idStore->idBuffer == NULL)
  26                 status = B_NO_MEMORY;
  27
  28         return status;
  29 }
  30
  31
  32 void
  33 _delete_unrhdr_buffer_locked(struct unrhdr* idStore)
  34 {
  35         radix_bitmap_destroy(idStore->idBuffer);
  36 }
  37
  38
  39 int
  40 _alloc_unr_locked(struct unrhdr* idStore)
  41 {
  42         radix_slot_t slotIndex;
  43         int id = ID_STORE_FULL;
  44
  45         slotIndex = radix_bitmap_alloc(idStore->idBuffer, 1);
  46         if (slotIndex != RADIX_SLOT_NONE)
  47                 id = slotIndex + idStore->idBias;
  48
  49         return id;
  50 }
  51
  52
  53 void
  54 _free_unr_locked(struct unrhdr* idStore, u_int identity)
  55 {
  56         uint32 slotIndex = (int32)identity - idStore->idBias;
  57
  58         radix_bitmap_dealloc(idStore->idBuffer, slotIndex, 1);
  59 }