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- /* Support code for dealing with priorities in the Hurd.
- Copyright (C) 1994 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If
- not, write to the Free Software Foundation, Inc., 675 Mass Ave,
- Cambridge, MA 02139, USA. */
-
- #include <hurd/resource.h>
- #include <hurd.h>
-
- error_t
- _hurd_priority_which_map (enum __priority_which which, int who,
- error_t (*function) (pid_t, struct procinfo *))
- {
- unsigned int npids = 64, i;
- pid_t pidbuf[npids], *pids;
- error_t err;
- struct procinfo *pip;
- int pibuf[sizeof *pip + 5 * sizeof (pip->threadinfos[0])], *pi = pibuf;
- unsigned int pisize = sizeof (pibuf) / sizeof (int);
-
- switch (which)
- {
- case PRIO_PROCESS:
- npids = 1;
- pids[0] = who;
- err = 0;
- break;
-
- case PRIO_PGRP:
- err = __USEPORT (PROC, __proc_getpgrppids (port, who, &pids, &npids));
- break;
-
- case PRIO_USER:
- err = __USEPORT (PROC, __proc_getallpids (port, &pids, &npids));
- break;
-
- default:
- return EINVAL;
- }
-
- for (i = 0; !err && i < npids; ++i)
- {
- if (which == PRIO_USER)
- {
- /* Get procinfo to check the owner. */
- int *oldpi = pi;
- unsigned int oldpisize = pisize;
- if (err = __USEPORT (PROC, __proc_getprocinfo (port, pids[i],
- &pi, &pisize)))
- continue;
- if (pi != oldpi && oldpi != pibuf)
- /* Old buffer from last call was not reused; free it. */
- __vm_deallocate (__mach_task_self (),
- (vm_address_t) oldpi, oldpisize * sizeof pi[0]);
-
- pip = (struct procinfo *) pi;
- if (pip->owner != who)
- continue;
- }
- else
- pip = NULL;
-
- err = (*function) (pids[i], pip);
- }
-
- if (pids != pidbuf)
- __vm_deallocate (__mach_task_self (),
- (vm_address_t) pids, npids * sizeof pids[0]);
- if (pi != pibuf)
- __vm_deallocate (__mach_task_self (),
- (vm_address_t) pi, pisize * sizeof pi[0]);
-
- return err;
- }
-