1*fdd8201dSApple OSS Distributions /*
2*fdd8201dSApple OSS Distributions * Copyright (c) 2006 Apple Computer, Inc. All rights reserved.
3*fdd8201dSApple OSS Distributions *
4*fdd8201dSApple OSS Distributions * @APPLE_LICENSE_HEADER_START@
5*fdd8201dSApple OSS Distributions *
6*fdd8201dSApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code
7*fdd8201dSApple OSS Distributions * as defined in and that are subject to the Apple Public Source License
8*fdd8201dSApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in
9*fdd8201dSApple OSS Distributions * compliance with the License. Please obtain a copy of the License at
10*fdd8201dSApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this
11*fdd8201dSApple OSS Distributions * file.
12*fdd8201dSApple OSS Distributions *
13*fdd8201dSApple OSS Distributions * The Original Code and all software distributed under the License are
14*fdd8201dSApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15*fdd8201dSApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16*fdd8201dSApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17*fdd8201dSApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18*fdd8201dSApple OSS Distributions * Please see the License for the specific language governing rights and
19*fdd8201dSApple OSS Distributions * limitations under the License.
20*fdd8201dSApple OSS Distributions *
21*fdd8201dSApple OSS Distributions * @APPLE_LICENSE_HEADER_END@
22*fdd8201dSApple OSS Distributions */
23*fdd8201dSApple OSS Distributions #include <errno.h>
24*fdd8201dSApple OSS Distributions #include <sys/resource.h>
25*fdd8201dSApple OSS Distributions #include <mach/port.h>
26*fdd8201dSApple OSS Distributions
27*fdd8201dSApple OSS Distributions extern int __iopolicysys(int, struct _iopol_param_t *);
28*fdd8201dSApple OSS Distributions extern void _pthread_clear_qos_tsd(mach_port_t);
29*fdd8201dSApple OSS Distributions
30*fdd8201dSApple OSS Distributions int
getiopolicy_np(int iotype,int scope)31*fdd8201dSApple OSS Distributions getiopolicy_np(int iotype, int scope)
32*fdd8201dSApple OSS Distributions {
33*fdd8201dSApple OSS Distributions int policy, error;
34*fdd8201dSApple OSS Distributions struct _iopol_param_t iop_param;
35*fdd8201dSApple OSS Distributions
36*fdd8201dSApple OSS Distributions /* Do not sanity check iotype and scope, leave it to kernel. */
37*fdd8201dSApple OSS Distributions
38*fdd8201dSApple OSS Distributions iop_param.iop_scope = scope;
39*fdd8201dSApple OSS Distributions iop_param.iop_iotype = iotype;
40*fdd8201dSApple OSS Distributions error = __iopolicysys(IOPOL_CMD_GET, &iop_param);
41*fdd8201dSApple OSS Distributions if (error != 0) {
42*fdd8201dSApple OSS Distributions errno = error;
43*fdd8201dSApple OSS Distributions policy = -1;
44*fdd8201dSApple OSS Distributions goto exit;
45*fdd8201dSApple OSS Distributions }
46*fdd8201dSApple OSS Distributions
47*fdd8201dSApple OSS Distributions policy = iop_param.iop_policy;
48*fdd8201dSApple OSS Distributions
49*fdd8201dSApple OSS Distributions exit:
50*fdd8201dSApple OSS Distributions return policy;
51*fdd8201dSApple OSS Distributions }
52*fdd8201dSApple OSS Distributions
53*fdd8201dSApple OSS Distributions int
setiopolicy_np(int iotype,int scope,int policy)54*fdd8201dSApple OSS Distributions setiopolicy_np(int iotype, int scope, int policy)
55*fdd8201dSApple OSS Distributions {
56*fdd8201dSApple OSS Distributions /* kernel validates the indiv values, no need to repeat it */
57*fdd8201dSApple OSS Distributions struct _iopol_param_t iop_param;
58*fdd8201dSApple OSS Distributions
59*fdd8201dSApple OSS Distributions iop_param.iop_scope = scope;
60*fdd8201dSApple OSS Distributions iop_param.iop_iotype = iotype;
61*fdd8201dSApple OSS Distributions iop_param.iop_policy = policy;
62*fdd8201dSApple OSS Distributions
63*fdd8201dSApple OSS Distributions int rv = __iopolicysys(IOPOL_CMD_SET, &iop_param);
64*fdd8201dSApple OSS Distributions if (rv == -2) {
65*fdd8201dSApple OSS Distributions /* not an actual error but indication that __iopolicysys removed the thread QoS */
66*fdd8201dSApple OSS Distributions _pthread_clear_qos_tsd(MACH_PORT_NULL);
67*fdd8201dSApple OSS Distributions rv = 0;
68*fdd8201dSApple OSS Distributions }
69*fdd8201dSApple OSS Distributions
70*fdd8201dSApple OSS Distributions return rv;
71*fdd8201dSApple OSS Distributions }
72