kernel2/include/ipc/sem.h

   1 /*
   2     meinOS - A unix-like x86 microkernel operating system
   3     Copyright (C) 2008  Janosch Gräf <janosch.graef@gmx.net>
   4
   5     This program is free software: you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation, either version 3 of the License, or
   8     (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, see <http://www.gnu.org/licenses/>.
  17 */
  18
  19 #ifndef _IPC_SEM_H_
  20 #define _IPC_SEM_H_
  21
  22 #include <sys/types.h>
  23 #include <ipc.h>
  24 #include <procm.h>
  25
  26 typedef struct ipc_sem_S ipc_sem_t;
  27
  28 typedef struct {
  29   ipc_sem_t *semset;
  30   int val;
  31   pid_t lopid;
  32   llist_t waitn;
  33   llist_t waitz;
  34 } ipc_sem_sem_t;
  35
  36 struct ipc_sem_S {
  37   ipc_obj_t ipc;
  38   size_t num;
  39   ipc_sem_sem_t *sems;
  40   time_t otime;
  41   time_t ctime;
  42 };
  43
  44 typedef struct {
  45   unsigned short num;
  46   short op;
  47   short flags;
  48 } ipc_sem_op_t;
  49
  50 typedef struct {
  51   int val;
  52   proc_t *proc;
  53 } ipc_sem_sleepn_t;
  54
  55 id_t ipc_sem_lastid;
  56
  57 int ipc_sem_init();
  58 id_t ipc_sem_get(key_t key);
  59 int ipc_sem_create(key_t key,size_t nsems,mode_t mode,time_t time);
  60 int ipc_sem_op(id_t id,ipc_sem_op_t *ops,size_t nops,time_t time);
  61 int ipc_sem_getval(id_t id,size_t num);
  62 int ipc_sem_setval(id_t id,size_t num,int val,time_t time);
  63 pid_t ipc_sem_getpid(id_t id,size_t num);
  64 size_t ipc_sem_getcnt(id_t id,size_t num,int type);
  65 int ipc_sem_getall(id_t id,short *buf);
  66 int ipc_sem_setall(id_t id,short *buf,time_t time);
  67 int ipc_sem_stat(id_t id,uid_t *uid,gid_t *gid,uid_t *cuid,gid_t *cgid,mode_t *mode,size_t *nsems,time_t *otime,time_t *ctime);
  68 int ipc_sem_set(id_t id,uid_t uid,gid_t gid,mode_t mode,time_t time);
  69 int ipc_sem_destroy(id_t id);
  70
  71 #endif