1*4d495c6eSApple OSS Distributions /*
2*4d495c6eSApple OSS Distributions * Copyright (c) 2006 Apple Computer, Inc. All rights reserved.
3*4d495c6eSApple OSS Distributions *
4*4d495c6eSApple OSS Distributions * @APPLE_LICENSE_HEADER_START@
5*4d495c6eSApple OSS Distributions *
6*4d495c6eSApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code
7*4d495c6eSApple OSS Distributions * as defined in and that are subject to the Apple Public Source License
8*4d495c6eSApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in
9*4d495c6eSApple OSS Distributions * compliance with the License. Please obtain a copy of the License at
10*4d495c6eSApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this
11*4d495c6eSApple OSS Distributions * file.
12*4d495c6eSApple OSS Distributions *
13*4d495c6eSApple OSS Distributions * The Original Code and all software distributed under the License are
14*4d495c6eSApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15*4d495c6eSApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16*4d495c6eSApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17*4d495c6eSApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18*4d495c6eSApple OSS Distributions * Please see the License for the specific language governing rights and
19*4d495c6eSApple OSS Distributions * limitations under the License.
20*4d495c6eSApple OSS Distributions *
21*4d495c6eSApple OSS Distributions * @APPLE_LICENSE_HEADER_END@
22*4d495c6eSApple OSS Distributions */
23*4d495c6eSApple OSS Distributions #include <errno.h>
24*4d495c6eSApple OSS Distributions #include <sys/resource.h>
25*4d495c6eSApple OSS Distributions #include <mach/port.h>
26*4d495c6eSApple OSS Distributions
27*4d495c6eSApple OSS Distributions extern int __iopolicysys(int, struct _iopol_param_t *);
28*4d495c6eSApple OSS Distributions extern void _pthread_clear_qos_tsd(mach_port_t);
29*4d495c6eSApple OSS Distributions
30*4d495c6eSApple OSS Distributions int
getiopolicy_np(int iotype,int scope)31*4d495c6eSApple OSS Distributions getiopolicy_np(int iotype, int scope)
32*4d495c6eSApple OSS Distributions {
33*4d495c6eSApple OSS Distributions int policy, error;
34*4d495c6eSApple OSS Distributions struct _iopol_param_t iop_param;
35*4d495c6eSApple OSS Distributions
36*4d495c6eSApple OSS Distributions /* Do not sanity check iotype and scope, leave it to kernel. */
37*4d495c6eSApple OSS Distributions
38*4d495c6eSApple OSS Distributions iop_param.iop_scope = scope;
39*4d495c6eSApple OSS Distributions iop_param.iop_iotype = iotype;
40*4d495c6eSApple OSS Distributions error = __iopolicysys(IOPOL_CMD_GET, &iop_param);
41*4d495c6eSApple OSS Distributions if (error != 0) {
42*4d495c6eSApple OSS Distributions policy = -1;
43*4d495c6eSApple OSS Distributions goto exit;
44*4d495c6eSApple OSS Distributions }
45*4d495c6eSApple OSS Distributions
46*4d495c6eSApple OSS Distributions policy = iop_param.iop_policy;
47*4d495c6eSApple OSS Distributions
48*4d495c6eSApple OSS Distributions exit:
49*4d495c6eSApple OSS Distributions return policy;
50*4d495c6eSApple OSS Distributions }
51*4d495c6eSApple OSS Distributions
52*4d495c6eSApple OSS Distributions int
setiopolicy_np(int iotype,int scope,int policy)53*4d495c6eSApple OSS Distributions setiopolicy_np(int iotype, int scope, int policy)
54*4d495c6eSApple OSS Distributions {
55*4d495c6eSApple OSS Distributions /* kernel validates the indiv values, no need to repeat it */
56*4d495c6eSApple OSS Distributions struct _iopol_param_t iop_param;
57*4d495c6eSApple OSS Distributions
58*4d495c6eSApple OSS Distributions iop_param.iop_scope = scope;
59*4d495c6eSApple OSS Distributions iop_param.iop_iotype = iotype;
60*4d495c6eSApple OSS Distributions iop_param.iop_policy = policy;
61*4d495c6eSApple OSS Distributions
62*4d495c6eSApple OSS Distributions int rv = __iopolicysys(IOPOL_CMD_SET, &iop_param);
63*4d495c6eSApple OSS Distributions if (rv == -2) {
64*4d495c6eSApple OSS Distributions /* not an actual error but indication that __iopolicysys removed the thread QoS */
65*4d495c6eSApple OSS Distributions _pthread_clear_qos_tsd(MACH_PORT_NULL);
66*4d495c6eSApple OSS Distributions rv = 0;
67*4d495c6eSApple OSS Distributions }
68*4d495c6eSApple OSS Distributions
69*4d495c6eSApple OSS Distributions return rv;
70*4d495c6eSApple OSS Distributions }
71