lib/libc/gen/semctl.c

   1 /* $DragonFly: src/lib/libc/gen/semctl.c,v 1.3 2005/04/26 06:08:42 joerg Exp $ */
   2
   3 #include <sys/types.h>
   4 #include <sys/ipc.h>
   5 #include <sys/sem.h>
   6 #include <stdarg.h>
   7 #include <stdlib.h>
   8
   9 int
  10 semctl(int semid, int semnum, int cmd, ...)
  11 {
  12         va_list ap;
  13         union semun semun;
  14         union semun *semun_ptr;
  15         va_start(ap, cmd);
  16         if (cmd == IPC_SET || cmd == IPC_STAT || cmd == GETALL
  17             || cmd == SETVAL || cmd == SETALL) {
  18                 semun = va_arg(ap, union semun);
  19                 semun_ptr = &semun;
  20         } else {
  21                 semun_ptr = NULL;
  22         }
  23         va_end(ap);
  24
  25         return (semsys(0, semid, semnum, cmd, semun_ptr));
  26 }