kernel/id.cpp

   1 /*
   2 lightOS kernel
   3 Copyright (C) 2006-2009 Jörg Pfähler
   4
   5 This program is free software; you can redistribute it and/or
   6 modify it under the terms of the GNU General Public License
   7 as published by the Free Software Foundation; either version 2
   8 of the License, or (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
  18 */
  19 #include <kernel/id.hpp>
  20 #include <kernel/spinlock.hpp>
  21 #include <lightOS/lightOS.hpp>
  22 using namespace kernel;
  23
  24 libkernel::port_id_t lastPortId = libkernel::message_port::user;
  25 libkernel::shared_memory_id_t lastSharedMemoryId = 0;
  26 #ifdef _LIGHTOS_SMP
  27         lightOS::spinlock mIdLock;
  28 #endif
  29
  30 id kernel::generateId()
  31 {
  32         LOCK(mIdLock);
  33                 id Id = ++lastPortId;
  34         UNLOCK(mIdLock);
  35         return Id;
  36 }
  37 libkernel::port_id_t kernel::generatePortId()
  38 {
  39         LOCK(mIdLock);
  40                 libkernel::port_id_t Id = ++lastPortId;
  41         UNLOCK(mIdLock);
  42         return Id;
  43 }
  44 libkernel::shared_memory_id_t kernel::generateSharedMemoryId()
  45 {
  46         LOCK(mIdLock);
  47                 libkernel::shared_memory_id_t Id = ++lastSharedMemoryId;
  48         UNLOCK(mIdLock);
  49         return Id;
  50 }