1*d8b80295SApple OSS Distributions /*
2*d8b80295SApple OSS Distributions * Copyright (c) 2006 Apple Computer, Inc. All rights reserved.
3*d8b80295SApple OSS Distributions *
4*d8b80295SApple OSS Distributions * @APPLE_LICENSE_HEADER_START@
5*d8b80295SApple OSS Distributions *
6*d8b80295SApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code
7*d8b80295SApple OSS Distributions * as defined in and that are subject to the Apple Public Source License
8*d8b80295SApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in
9*d8b80295SApple OSS Distributions * compliance with the License. Please obtain a copy of the License at
10*d8b80295SApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this
11*d8b80295SApple OSS Distributions * file.
12*d8b80295SApple OSS Distributions *
13*d8b80295SApple OSS Distributions * The Original Code and all software distributed under the License are
14*d8b80295SApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15*d8b80295SApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16*d8b80295SApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17*d8b80295SApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18*d8b80295SApple OSS Distributions * Please see the License for the specific language governing rights and
19*d8b80295SApple OSS Distributions * limitations under the License.
20*d8b80295SApple OSS Distributions *
21*d8b80295SApple OSS Distributions * @APPLE_LICENSE_HEADER_END@
22*d8b80295SApple OSS Distributions */
23*d8b80295SApple OSS Distributions #include <errno.h>
24*d8b80295SApple OSS Distributions #include <sys/resource.h>
25*d8b80295SApple OSS Distributions #include <mach/port.h>
26*d8b80295SApple OSS Distributions
27*d8b80295SApple OSS Distributions extern int __iopolicysys(int, struct _iopol_param_t *);
28*d8b80295SApple OSS Distributions extern void _pthread_clear_qos_tsd(mach_port_t);
29*d8b80295SApple OSS Distributions
30*d8b80295SApple OSS Distributions int
getiopolicy_np(int iotype,int scope)31*d8b80295SApple OSS Distributions getiopolicy_np(int iotype, int scope)
32*d8b80295SApple OSS Distributions {
33*d8b80295SApple OSS Distributions int policy, error;
34*d8b80295SApple OSS Distributions struct _iopol_param_t iop_param;
35*d8b80295SApple OSS Distributions
36*d8b80295SApple OSS Distributions /* Do not sanity check iotype and scope, leave it to kernel. */
37*d8b80295SApple OSS Distributions
38*d8b80295SApple OSS Distributions iop_param.iop_scope = scope;
39*d8b80295SApple OSS Distributions iop_param.iop_iotype = iotype;
40*d8b80295SApple OSS Distributions error = __iopolicysys(IOPOL_CMD_GET, &iop_param);
41*d8b80295SApple OSS Distributions if (error != 0) {
42*d8b80295SApple OSS Distributions errno = error;
43*d8b80295SApple OSS Distributions policy = -1;
44*d8b80295SApple OSS Distributions goto exit;
45*d8b80295SApple OSS Distributions }
46*d8b80295SApple OSS Distributions
47*d8b80295SApple OSS Distributions policy = iop_param.iop_policy;
48*d8b80295SApple OSS Distributions
49*d8b80295SApple OSS Distributions exit:
50*d8b80295SApple OSS Distributions return policy;
51*d8b80295SApple OSS Distributions }
52*d8b80295SApple OSS Distributions
53*d8b80295SApple OSS Distributions int
setiopolicy_np(int iotype,int scope,int policy)54*d8b80295SApple OSS Distributions setiopolicy_np(int iotype, int scope, int policy)
55*d8b80295SApple OSS Distributions {
56*d8b80295SApple OSS Distributions /* kernel validates the indiv values, no need to repeat it */
57*d8b80295SApple OSS Distributions struct _iopol_param_t iop_param;
58*d8b80295SApple OSS Distributions
59*d8b80295SApple OSS Distributions iop_param.iop_scope = scope;
60*d8b80295SApple OSS Distributions iop_param.iop_iotype = iotype;
61*d8b80295SApple OSS Distributions iop_param.iop_policy = policy;
62*d8b80295SApple OSS Distributions
63*d8b80295SApple OSS Distributions int rv = __iopolicysys(IOPOL_CMD_SET, &iop_param);
64*d8b80295SApple OSS Distributions if (rv == -2) {
65*d8b80295SApple OSS Distributions /* not an actual error but indication that __iopolicysys removed the thread QoS */
66*d8b80295SApple OSS Distributions _pthread_clear_qos_tsd(MACH_PORT_NULL);
67*d8b80295SApple OSS Distributions rv = 0;
68*d8b80295SApple OSS Distributions }
69*d8b80295SApple OSS Distributions
70*d8b80295SApple OSS Distributions return rv;
71*d8b80295SApple OSS Distributions }
72