1*33de042dSApple OSS Distributions /*
2*33de042dSApple OSS Distributions * Copyright (c) 2006 Apple Computer, Inc. All rights reserved.
3*33de042dSApple OSS Distributions *
4*33de042dSApple OSS Distributions * @APPLE_LICENSE_HEADER_START@
5*33de042dSApple OSS Distributions *
6*33de042dSApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code
7*33de042dSApple OSS Distributions * as defined in and that are subject to the Apple Public Source License
8*33de042dSApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in
9*33de042dSApple OSS Distributions * compliance with the License. Please obtain a copy of the License at
10*33de042dSApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this
11*33de042dSApple OSS Distributions * file.
12*33de042dSApple OSS Distributions *
13*33de042dSApple OSS Distributions * The Original Code and all software distributed under the License are
14*33de042dSApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15*33de042dSApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16*33de042dSApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17*33de042dSApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18*33de042dSApple OSS Distributions * Please see the License for the specific language governing rights and
19*33de042dSApple OSS Distributions * limitations under the License.
20*33de042dSApple OSS Distributions *
21*33de042dSApple OSS Distributions * @APPLE_LICENSE_HEADER_END@
22*33de042dSApple OSS Distributions */
23*33de042dSApple OSS Distributions #include <errno.h>
24*33de042dSApple OSS Distributions #include <sys/resource.h>
25*33de042dSApple OSS Distributions #include <mach/port.h>
26*33de042dSApple OSS Distributions
27*33de042dSApple OSS Distributions extern int __iopolicysys(int, struct _iopol_param_t *);
28*33de042dSApple OSS Distributions extern void _pthread_clear_qos_tsd(mach_port_t);
29*33de042dSApple OSS Distributions
30*33de042dSApple OSS Distributions int
getiopolicy_np(int iotype,int scope)31*33de042dSApple OSS Distributions getiopolicy_np(int iotype, int scope)
32*33de042dSApple OSS Distributions {
33*33de042dSApple OSS Distributions int policy, error;
34*33de042dSApple OSS Distributions struct _iopol_param_t iop_param;
35*33de042dSApple OSS Distributions
36*33de042dSApple OSS Distributions /* Do not sanity check iotype and scope, leave it to kernel. */
37*33de042dSApple OSS Distributions
38*33de042dSApple OSS Distributions iop_param.iop_scope = scope;
39*33de042dSApple OSS Distributions iop_param.iop_iotype = iotype;
40*33de042dSApple OSS Distributions error = __iopolicysys(IOPOL_CMD_GET, &iop_param);
41*33de042dSApple OSS Distributions if (error != 0) {
42*33de042dSApple OSS Distributions errno = error;
43*33de042dSApple OSS Distributions policy = -1;
44*33de042dSApple OSS Distributions goto exit;
45*33de042dSApple OSS Distributions }
46*33de042dSApple OSS Distributions
47*33de042dSApple OSS Distributions policy = iop_param.iop_policy;
48*33de042dSApple OSS Distributions
49*33de042dSApple OSS Distributions exit:
50*33de042dSApple OSS Distributions return policy;
51*33de042dSApple OSS Distributions }
52*33de042dSApple OSS Distributions
53*33de042dSApple OSS Distributions int
setiopolicy_np(int iotype,int scope,int policy)54*33de042dSApple OSS Distributions setiopolicy_np(int iotype, int scope, int policy)
55*33de042dSApple OSS Distributions {
56*33de042dSApple OSS Distributions /* kernel validates the indiv values, no need to repeat it */
57*33de042dSApple OSS Distributions struct _iopol_param_t iop_param;
58*33de042dSApple OSS Distributions
59*33de042dSApple OSS Distributions iop_param.iop_scope = scope;
60*33de042dSApple OSS Distributions iop_param.iop_iotype = iotype;
61*33de042dSApple OSS Distributions iop_param.iop_policy = policy;
62*33de042dSApple OSS Distributions
63*33de042dSApple OSS Distributions int rv = __iopolicysys(IOPOL_CMD_SET, &iop_param);
64*33de042dSApple OSS Distributions if (rv == -2) {
65*33de042dSApple OSS Distributions /* not an actual error but indication that __iopolicysys removed the thread QoS */
66*33de042dSApple OSS Distributions _pthread_clear_qos_tsd(MACH_PORT_NULL);
67*33de042dSApple OSS Distributions rv = 0;
68*33de042dSApple OSS Distributions }
69*33de042dSApple OSS Distributions
70*33de042dSApple OSS Distributions return rv;
71*33de042dSApple OSS Distributions }
72