17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*d4204c85Sraf * Common Development and Distribution License (the "License"). 6*d4204c85Sraf * You may not use this file except in compliance with the License. 77c478bd9Sstevel@tonic-gate * 87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 117c478bd9Sstevel@tonic-gate * and limitations under the License. 127c478bd9Sstevel@tonic-gate * 137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 187c478bd9Sstevel@tonic-gate * 197c478bd9Sstevel@tonic-gate * CDDL HEADER END 207c478bd9Sstevel@tonic-gate */ 21*d4204c85Sraf 22*d4204c85Sraf /* 23*d4204c85Sraf * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24*d4204c85Sraf * Use is subject to license terms. 25*d4204c85Sraf */ 26*d4204c85Sraf 277c478bd9Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 287c478bd9Sstevel@tonic-gate /* All Rights Reserved */ 297c478bd9Sstevel@tonic-gate 307c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" /* from SVr4.0 1.15 */ 317c478bd9Sstevel@tonic-gate 327c478bd9Sstevel@tonic-gate #include <sys/types.h> 337c478bd9Sstevel@tonic-gate #include <sys/param.h> 347c478bd9Sstevel@tonic-gate #include <sys/sysmacros.h> 357c478bd9Sstevel@tonic-gate #include <sys/systm.h> 367c478bd9Sstevel@tonic-gate #include <sys/errno.h> 377c478bd9Sstevel@tonic-gate #include <sys/cred.h> 387c478bd9Sstevel@tonic-gate #include <sys/proc.h> 397c478bd9Sstevel@tonic-gate #include <sys/debug.h> 407c478bd9Sstevel@tonic-gate #include <sys/class.h> 417c478bd9Sstevel@tonic-gate #include <sys/mutex.h> 42*d4204c85Sraf #include <sys/schedctl.h> 437c478bd9Sstevel@tonic-gate 447c478bd9Sstevel@tonic-gate /* 457c478bd9Sstevel@tonic-gate * We support the nice system call for compatibility although 467c478bd9Sstevel@tonic-gate * the priocntl system call supports a superset of nice's functionality. 477c478bd9Sstevel@tonic-gate * We support nice only for time sharing threads. It will fail 487c478bd9Sstevel@tonic-gate * if called by a thread from another class. 497c478bd9Sstevel@tonic-gate */ 507c478bd9Sstevel@tonic-gate 517c478bd9Sstevel@tonic-gate int 527c478bd9Sstevel@tonic-gate nice(int niceness) 537c478bd9Sstevel@tonic-gate { 547c478bd9Sstevel@tonic-gate int error = 0; 557c478bd9Sstevel@tonic-gate int err, retval; 56*d4204c85Sraf kthread_t *t; 577c478bd9Sstevel@tonic-gate proc_t *p = curproc; 587c478bd9Sstevel@tonic-gate 597c478bd9Sstevel@tonic-gate mutex_enter(&p->p_lock); 607c478bd9Sstevel@tonic-gate t = p->p_tlist; 617c478bd9Sstevel@tonic-gate do { 627c478bd9Sstevel@tonic-gate err = CL_DONICE(t, CRED(), niceness, &retval); 63*d4204c85Sraf schedctl_set_cidpri(t); 647c478bd9Sstevel@tonic-gate if (error == 0 && err) 657c478bd9Sstevel@tonic-gate error = set_errno(err); 667c478bd9Sstevel@tonic-gate } while ((t = t->t_forw) != p->p_tlist); 677c478bd9Sstevel@tonic-gate mutex_exit(&p->p_lock); 687c478bd9Sstevel@tonic-gate if (error) 697c478bd9Sstevel@tonic-gate return (error); 707c478bd9Sstevel@tonic-gate return (retval); 717c478bd9Sstevel@tonic-gate } 72