From 28f540f45bbacd939bfd07f213bcad2bf730b1bf Mon Sep 17 00:00:00 2001
From: Roland McGrath <roland@gnu.org>
Date: Sat, 18 Feb 1995 01:27:10 +0000
Subject: initial import

---
 sysdeps/mach/hurd/getpriority.c | 73 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 sysdeps/mach/hurd/getpriority.c

(limited to 'sysdeps/mach/hurd/getpriority.c')

diff --git a/sysdeps/mach/hurd/getpriority.c b/sysdeps/mach/hurd/getpriority.c
new file mode 100644
index 0000000000..5b24ce23f8
--- /dev/null
+++ b/sysdeps/mach/hurd/getpriority.c
@@ -0,0 +1,73 @@
+/* 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 <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, int 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;
+  unsigned int pisize = sizeof pibuf / sizeof pibuf[0];
+
+  error_t getonepriority (pid_t pid, struct procinfo *pip)
+    {
+      if (pip)
+	onerr = 0;
+      else
+	{
+	  int *oldpi = pi;
+	  unsigned int oldpisize = pisize;
+	  onerr = __USEPORT (PROC, __proc_getprocinfo (port,
+						       pid,
+						       &pi, &pisize));
+	  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 (!onerr && pip->taskinfo.base_priority > maxpri)
+	maxpri = pip->taskinfo.base_priority;
+      return 0;
+    }
+
+  onerr = 0;
+  err = _hurd_priority_which_map (which, who, getonepriority);
+
+  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);
+}
-- 
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