43 lines
1.5 KiB
C
43 lines
1.5 KiB
C
/* getpriority for Linux.
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Copyright (C) 1996 Free Software Foundation, Inc.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <errno.h>
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#include <sys/resource.h>
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extern int __syscall_getpriority (int, int);
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/* The return value of __syscall_getpriority is biased by this value
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to avoid returning negative values. */
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#define PZERO 20
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/* Return the highest priority of any process specified by WHICH and WHO
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(see above); if WHO is zero, the current process, process group, or user
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(as specified by WHO) is used. A lower priority number means higher
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priority. Priorities range from PRIO_MIN to PRIO_MAX. */
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int
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getpriority (enum __priority_which which, int who)
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{
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int res;
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res = __syscall_getpriority ((int) which, who);
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if (res >= 0)
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res = PZERO - res;
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return res;
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}
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