1*c54f35caSApple OSS Distributions /*
2*c54f35caSApple OSS Distributions * Copyright (c) 2006 Apple Computer, Inc. All rights reserved.
3*c54f35caSApple OSS Distributions *
4*c54f35caSApple OSS Distributions * @APPLE_LICENSE_HEADER_START@
5*c54f35caSApple OSS Distributions *
6*c54f35caSApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code
7*c54f35caSApple OSS Distributions * as defined in and that are subject to the Apple Public Source License
8*c54f35caSApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in
9*c54f35caSApple OSS Distributions * compliance with the License. Please obtain a copy of the License at
10*c54f35caSApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this
11*c54f35caSApple OSS Distributions * file.
12*c54f35caSApple OSS Distributions *
13*c54f35caSApple OSS Distributions * The Original Code and all software distributed under the License are
14*c54f35caSApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15*c54f35caSApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16*c54f35caSApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17*c54f35caSApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18*c54f35caSApple OSS Distributions * Please see the License for the specific language governing rights and
19*c54f35caSApple OSS Distributions * limitations under the License.
20*c54f35caSApple OSS Distributions *
21*c54f35caSApple OSS Distributions * @APPLE_LICENSE_HEADER_END@
22*c54f35caSApple OSS Distributions */
23*c54f35caSApple OSS Distributions #include <errno.h>
24*c54f35caSApple OSS Distributions #include <sys/resource.h>
25*c54f35caSApple OSS Distributions #include <mach/port.h>
26*c54f35caSApple OSS Distributions
27*c54f35caSApple OSS Distributions extern int __iopolicysys(int, struct _iopol_param_t *);
28*c54f35caSApple OSS Distributions extern void _pthread_clear_qos_tsd(mach_port_t);
29*c54f35caSApple OSS Distributions
30*c54f35caSApple OSS Distributions int
getiopolicy_np(int iotype,int scope)31*c54f35caSApple OSS Distributions getiopolicy_np(int iotype, int scope)
32*c54f35caSApple OSS Distributions {
33*c54f35caSApple OSS Distributions int policy, error;
34*c54f35caSApple OSS Distributions struct _iopol_param_t iop_param;
35*c54f35caSApple OSS Distributions
36*c54f35caSApple OSS Distributions /* Do not sanity check iotype and scope, leave it to kernel. */
37*c54f35caSApple OSS Distributions
38*c54f35caSApple OSS Distributions iop_param.iop_scope = scope;
39*c54f35caSApple OSS Distributions iop_param.iop_iotype = iotype;
40*c54f35caSApple OSS Distributions error = __iopolicysys(IOPOL_CMD_GET, &iop_param);
41*c54f35caSApple OSS Distributions if (error != 0) {
42*c54f35caSApple OSS Distributions errno = error;
43*c54f35caSApple OSS Distributions policy = -1;
44*c54f35caSApple OSS Distributions goto exit;
45*c54f35caSApple OSS Distributions }
46*c54f35caSApple OSS Distributions
47*c54f35caSApple OSS Distributions policy = iop_param.iop_policy;
48*c54f35caSApple OSS Distributions
49*c54f35caSApple OSS Distributions exit:
50*c54f35caSApple OSS Distributions return policy;
51*c54f35caSApple OSS Distributions }
52*c54f35caSApple OSS Distributions
53*c54f35caSApple OSS Distributions int
setiopolicy_np(int iotype,int scope,int policy)54*c54f35caSApple OSS Distributions setiopolicy_np(int iotype, int scope, int policy)
55*c54f35caSApple OSS Distributions {
56*c54f35caSApple OSS Distributions /* kernel validates the indiv values, no need to repeat it */
57*c54f35caSApple OSS Distributions struct _iopol_param_t iop_param;
58*c54f35caSApple OSS Distributions
59*c54f35caSApple OSS Distributions iop_param.iop_scope = scope;
60*c54f35caSApple OSS Distributions iop_param.iop_iotype = iotype;
61*c54f35caSApple OSS Distributions iop_param.iop_policy = policy;
62*c54f35caSApple OSS Distributions
63*c54f35caSApple OSS Distributions int rv = __iopolicysys(IOPOL_CMD_SET, &iop_param);
64*c54f35caSApple OSS Distributions if (rv == -2) {
65*c54f35caSApple OSS Distributions /* not an actual error but indication that __iopolicysys removed the thread QoS */
66*c54f35caSApple OSS Distributions _pthread_clear_qos_tsd(MACH_PORT_NULL);
67*c54f35caSApple OSS Distributions rv = 0;
68*c54f35caSApple OSS Distributions }
69*c54f35caSApple OSS Distributions
70*c54f35caSApple OSS Distributions return rv;
71*c54f35caSApple OSS Distributions }
72