mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-27 21:20:18 +00:00
85 lines
2.8 KiB
C
85 lines
2.8 KiB
C
/* Copyright (C) 1994,95,96,97,2000,02 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 Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <limits.h>
|
|
#include <hurd.h>
|
|
#include <hurd/resource.h>
|
|
|
|
/* Return the highest priority of any process specified by WHICH and WHO
|
|
(see <sys/resource.h>); if WHO is zero, the current process, process group,
|
|
or user (as specified by WHO) is used. A lower priority number means higher
|
|
priority. Priorities range from PRIO_MIN to PRIO_MAX. */
|
|
int
|
|
getpriority (enum __priority_which which, id_t who)
|
|
{
|
|
error_t err, onerr;
|
|
int maxpri = INT_MIN;
|
|
struct procinfo *pip; /* Just for sizeof. */
|
|
int pibuf[sizeof *pip + 2 * sizeof (pip->threadinfos[0])], *pi = pibuf;
|
|
size_t pisize = sizeof pibuf / sizeof pibuf[0];
|
|
|
|
error_t getonepriority (pid_t pid, struct procinfo *pip)
|
|
{
|
|
if (pip)
|
|
onerr = 0;
|
|
else
|
|
{
|
|
int *oldpi = pi;
|
|
size_t oldpisize = pisize;
|
|
char *tw = 0;
|
|
size_t twsz = 0;
|
|
int flags = PI_FETCH_TASKINFO;
|
|
onerr = __USEPORT (PROC, __proc_getprocinfo (port, pid, &flags,
|
|
&pi, &pisize,
|
|
&tw, &twsz));
|
|
if (twsz)
|
|
__vm_deallocate (__mach_task_self (), (vm_address_t) tw, twsz);
|
|
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;
|
|
}
|
|
#ifdef TASK_SCHED_TIMESHARE_INFO
|
|
if (!onerr && pip->timeshare_base_info.base_priority > maxpri)
|
|
maxpri = pip->timeshare_base_info.base_priority;
|
|
#else
|
|
if (!onerr && pip->taskinfo.base_priority > maxpri)
|
|
maxpri = pip->taskinfo.base_priority;
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
onerr = 0;
|
|
err = _hurd_priority_which_map (which, who,
|
|
getonepriority, PI_FETCH_TASKINFO);
|
|
|
|
if (pi != pibuf)
|
|
__vm_deallocate (__mach_task_self (),
|
|
(vm_address_t) pi, pisize * sizeof pi[0]);
|
|
|
|
if (!err && maxpri == INT_MIN)
|
|
/* No error, but no pids found. */
|
|
err = onerr ?: ESRCH;
|
|
|
|
if (err)
|
|
return __hurd_fail (err);
|
|
|
|
return MACH_PRIORITY_TO_NICE (maxpri);
|
|
}
|
|
libc_hidden_def (getpriority)
|