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-rw-r--r--hurd/hurdprio.c87
1 files changed, 87 insertions, 0 deletions
diff --git a/hurd/hurdprio.c b/hurd/hurdprio.c
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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 *))
+{
+ mach_msg_type_number_t 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;
+ mach_msg_type_number_t 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;
+ mach_msg_type_number_t 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;
+}