1*a325d9c4SApple OSS Distributions /*
2*a325d9c4SApple OSS Distributions * Copyright (c) 2006 Apple Computer, Inc. All rights reserved.
3*a325d9c4SApple OSS Distributions *
4*a325d9c4SApple OSS Distributions * @APPLE_LICENSE_HEADER_START@
5*a325d9c4SApple OSS Distributions *
6*a325d9c4SApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code
7*a325d9c4SApple OSS Distributions * as defined in and that are subject to the Apple Public Source License
8*a325d9c4SApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in
9*a325d9c4SApple OSS Distributions * compliance with the License. Please obtain a copy of the License at
10*a325d9c4SApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this
11*a325d9c4SApple OSS Distributions * file.
12*a325d9c4SApple OSS Distributions *
13*a325d9c4SApple OSS Distributions * The Original Code and all software distributed under the License are
14*a325d9c4SApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15*a325d9c4SApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16*a325d9c4SApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17*a325d9c4SApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18*a325d9c4SApple OSS Distributions * Please see the License for the specific language governing rights and
19*a325d9c4SApple OSS Distributions * limitations under the License.
20*a325d9c4SApple OSS Distributions *
21*a325d9c4SApple OSS Distributions * @APPLE_LICENSE_HEADER_END@
22*a325d9c4SApple OSS Distributions */
23*a325d9c4SApple OSS Distributions #include <errno.h>
24*a325d9c4SApple OSS Distributions #include <sys/resource.h>
25*a325d9c4SApple OSS Distributions #include <mach/port.h>
26*a325d9c4SApple OSS Distributions
27*a325d9c4SApple OSS Distributions extern int __iopolicysys(int, struct _iopol_param_t *);
28*a325d9c4SApple OSS Distributions extern void _pthread_clear_qos_tsd(mach_port_t);
29*a325d9c4SApple OSS Distributions
30*a325d9c4SApple OSS Distributions int
getiopolicy_np(int iotype,int scope)31*a325d9c4SApple OSS Distributions getiopolicy_np(int iotype, int scope)
32*a325d9c4SApple OSS Distributions {
33*a325d9c4SApple OSS Distributions int policy, error;
34*a325d9c4SApple OSS Distributions struct _iopol_param_t iop_param;
35*a325d9c4SApple OSS Distributions
36*a325d9c4SApple OSS Distributions /* Do not sanity check iotype and scope, leave it to kernel. */
37*a325d9c4SApple OSS Distributions
38*a325d9c4SApple OSS Distributions iop_param.iop_scope = scope;
39*a325d9c4SApple OSS Distributions iop_param.iop_iotype = iotype;
40*a325d9c4SApple OSS Distributions error = __iopolicysys(IOPOL_CMD_GET, &iop_param);
41*a325d9c4SApple OSS Distributions if (error != 0) {
42*a325d9c4SApple OSS Distributions errno = error;
43*a325d9c4SApple OSS Distributions policy = -1;
44*a325d9c4SApple OSS Distributions goto exit;
45*a325d9c4SApple OSS Distributions }
46*a325d9c4SApple OSS Distributions
47*a325d9c4SApple OSS Distributions policy = iop_param.iop_policy;
48*a325d9c4SApple OSS Distributions
49*a325d9c4SApple OSS Distributions exit:
50*a325d9c4SApple OSS Distributions return policy;
51*a325d9c4SApple OSS Distributions }
52*a325d9c4SApple OSS Distributions
53*a325d9c4SApple OSS Distributions int
setiopolicy_np(int iotype,int scope,int policy)54*a325d9c4SApple OSS Distributions setiopolicy_np(int iotype, int scope, int policy)
55*a325d9c4SApple OSS Distributions {
56*a325d9c4SApple OSS Distributions /* kernel validates the indiv values, no need to repeat it */
57*a325d9c4SApple OSS Distributions struct _iopol_param_t iop_param;
58*a325d9c4SApple OSS Distributions
59*a325d9c4SApple OSS Distributions iop_param.iop_scope = scope;
60*a325d9c4SApple OSS Distributions iop_param.iop_iotype = iotype;
61*a325d9c4SApple OSS Distributions iop_param.iop_policy = policy;
62*a325d9c4SApple OSS Distributions
63*a325d9c4SApple OSS Distributions int rv = __iopolicysys(IOPOL_CMD_SET, &iop_param);
64*a325d9c4SApple OSS Distributions if (rv == -2) {
65*a325d9c4SApple OSS Distributions /* not an actual error but indication that __iopolicysys removed the thread QoS */
66*a325d9c4SApple OSS Distributions _pthread_clear_qos_tsd(MACH_PORT_NULL);
67*a325d9c4SApple OSS Distributions rv = 0;
68*a325d9c4SApple OSS Distributions }
69*a325d9c4SApple OSS Distributions
70*a325d9c4SApple OSS Distributions return rv;
71*a325d9c4SApple OSS Distributions }
72