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93 lines
2.7 KiB
C
93 lines
2.7 KiB
C
/*
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* Copyright (c) 2014 Apple Inc. All rights reserved.
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*
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* @APPLE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this
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* file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_LICENSE_HEADER_END@
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*/
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#ifndef _PTHREAD_SPAWN_H
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#define _PTHREAD_SPAWN_H
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/*!
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* @group posix_spawn QOS class support
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* Apple extensions to posix_spawn(2) and posix_spawnp(2)
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*/
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#include <pthread/pthread.h>
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#include <spawn.h>
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__BEGIN_DECLS
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/*!
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* @function posix_spawnattr_set_qos_class_np
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*
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* @abstract
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* Sets the QOS class property of a posix_spawn attributes object, which may be
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* used to specify the QOS class a process should be spawned with.
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*
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* @discussion
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* The QOS class specified at the time of process spawn determines both the
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* initial requested QOS class of the main thread in the new process, and the
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* interpretation by the system of all QOS class values requested by threads in
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* the process.
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*
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* @param __attr
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* The spawn attributes object to modify.
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*
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* @param __qos_class
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* A QOS class value:
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* - QOS_CLASS_UTILITY
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* - QOS_CLASS_BACKGROUND
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* EINVAL will be returned if any other value is provided.
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*
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* @return
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* Zero if successful, otherwise an errno value.
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*/
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__OSX_AVAILABLE_STARTING(__MAC_10_10, __IPHONE_8_0)
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int
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posix_spawnattr_set_qos_class_np(posix_spawnattr_t * __restrict __attr,
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qos_class_t __qos_class);
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/*!
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* @function posix_spawnattr_get_qos_class_np
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*
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* @abstract
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* Gets the QOS class property of a posix_spawn attributes object.
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*
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* @param __attr
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* The spawn attributes object to inspect.
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*
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* @param __qos_class
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* On output, a QOS class value:
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* - QOS_CLASS_UTILITY
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* - QOS_CLASS_BACKGROUND
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* - QOS_CLASS_UNSPECIFIED
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*
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* @return
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* Zero if successful, otherwise an errno value.
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*/
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__OSX_AVAILABLE_STARTING(__MAC_10_10, __IPHONE_8_0)
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int
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posix_spawnattr_get_qos_class_np(const posix_spawnattr_t *__restrict __attr,
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qos_class_t * __restrict __qos_class);
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__END_DECLS
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#endif // _PTHREAD_SPAWN_H
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