| | 1 | /* |
| | 2 | * Copyright (c) 2006 Apple Computer, Inc. All rights reserved. |
| | 3 | * |
| | 4 | * @APPLE_LICENSE_HEADER_START@ |
| | 5 | * |
| | 6 | * This file contains Original Code and/or Modifications of Original Code |
| | 7 | * as defined in and that are subject to the Apple Public Source License |
| | 8 | * Version 2.0 (the 'License'). You may not use this file except in |
| | 9 | * compliance with the License. Please obtain a copy of the License at |
| | 10 | * http://www.opensource.apple.com/apsl/ and read it before using this |
| | 11 | * file. |
| | 12 | * |
| | 13 | * The Original Code and all software distributed under the License are |
| | 14 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| | 15 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 16 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 17 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| | 18 | * Please see the License for the specific language governing rights and |
| | 19 | * limitations under the License. |
| | 20 | * |
| | 21 | * @APPLE_LICENSE_HEADER_END@ |
| | 22 | */ |
| | 23 | #include <errno.h> |
| | 24 | #include <sys/resource.h> |
| | 25 | #include <mach/port.h> |
| | 26 | |
| | 27 | extern int __iopolicysys(int, struct _iopol_param_t *); |
| | 28 | extern void _pthread_clear_qos_tsd(mach_port_t); |
| | 29 | |
| | 30 | int |
| | 31 | getiopolicy_np(int iotype, int scope) |
| | 32 | { |
| | 33 | int policy, error; |
| | 34 | struct _iopol_param_t iop_param; |
| | 35 | |
| | 36 | if (iotype != IOPOL_TYPE_DISK || |
| | 37 | (scope != IOPOL_SCOPE_PROCESS && scope != IOPOL_SCOPE_THREAD)) { |
| | 38 | errno = EINVAL; |
| | 39 | policy = -1; |
| | 40 | goto exit; |
| | 41 | } |
| | 42 | |
| | 43 | iop_param.iop_scope = scope; |
| | 44 | iop_param.iop_iotype = iotype; |
| | 45 | error = __iopolicysys(IOPOL_CMD_GET, &iop_param); |
| | 46 | if (error != 0) { |
| | 47 | errno = error; |
| | 48 | policy = -1; |
| | 49 | goto exit; |
| | 50 | } |
| | 51 | |
| | 52 | policy = iop_param.iop_policy; |
| | 53 | |
| | 54 | exit: |
| | 55 | return policy; |
| | 56 | } |
| | 57 | |
| | 58 | int |
| | 59 | setiopolicy_np(int iotype, int scope, int policy) |
| | 60 | { |
| | 61 | /* kernel validates the indiv values, no need to repeat it */ |
| | 62 | struct _iopol_param_t iop_param; |
| | 63 | |
| | 64 | iop_param.iop_scope = scope; |
| | 65 | iop_param.iop_iotype = iotype; |
| | 66 | iop_param.iop_policy = policy; |
| | 67 | |
| | 68 | int rv = __iopolicysys(IOPOL_CMD_SET, &iop_param); |
| | 69 | if (rv == -2) { |
| | 70 | /* not an actual error but indication that __iopolicysys removed the thread QoS */ |
| | 71 | _pthread_clear_qos_tsd(MACH_PORT_NULL); |
| | 72 | rv = 0; |
| | 73 | } |
| | 74 | |
| | 75 | return rv; |
| | 76 | } |
projects / apple / xnu.git / blame_incremental