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88 lines
3.2 KiB
C
88 lines
3.2 KiB
C
/*
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* Copyright (c) 20017 Apple Inc. All rights reserved.
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*
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* @APPLE_APACHE_LICENSE_HEADER_START@
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* @APPLE_APACHE_LICENSE_HEADER_END@
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*/
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/*
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* IMPORTANT: This header file describes INTERNAL interfaces to libdispatch
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* which are subject to change in future releases. Any applications relying on
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* these interfaces WILL break.
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*/
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#ifndef __DISPATCH_TIME_PRIVATE__
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#define __DISPATCH_TIME_PRIVATE__
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#ifndef __DISPATCH_INDIRECT__
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#error "Please #include <dispatch/private.h> instead of this file directly."
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#include <dispatch/base.h> // for HeaderDoc
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#endif
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/*
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* @constant DISPATCH_MONOTONICTIME_NOW
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* A dispatch_time_t value that corresponds to the current value of the
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* platform's monotonic clock. On Apple platforms, this clock is based on
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* mach_continuous_time(). Use this value with the dispatch_time() function to
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* derive a time value for a timer in monotonic time (i.e. a timer that
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* continues to tick while the system is asleep). For example:
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*
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* dispatch_time_t t = dispatch_time(DISPATCH_MONOTONICTIME_NOW,5*NSEC_PER_SEC);
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* dispatch_source_t ds = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER,
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* 0, 0, q);
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* dispatch_source_set_event_handler(ds, ^{ ... });
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* dispatch_source_set_timer(ds, t, 10 * NSEC_PER_SEC, 0);
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* dispatch_activate(ds);
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*/
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enum {
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DISPATCH_MONOTONICTIME_NOW DISPATCH_ENUM_API_AVAILABLE(macos(10.14), ios(12.0), tvos(12.0), watchos(5.0)) = (1ull << 63)
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};
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#ifdef __APPLE__
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// Helper macros for up time, montonic time and wall time.
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#define _dispatch_uptime_after_nsec(t) \
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dispatch_time(DISPATCH_TIME_NOW, (t))
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#define _dispatch_uptime_after_usec(t) \
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dispatch_time(DISPATCH_TIME_NOW, (t) * NSEC_PER_USEC)
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#define _dispatch_uptime_after_msec(t) \
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dispatch_time(DISPATCH_TIME_NOW, (t) * NSEC_PER_MSEC)
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#define _dispatch_uptime_after_sec(t) \
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dispatch_time(DISPATCH_TIME_NOW, (t) * NSEC_PER_SEC)
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#define _dispatch_monotonictime_after_nsec(t) \
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dispatch_time(DISPATCH_MONOTONICTIME_NOW, (t))
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#define _dispatch_monotonictime_after_usec(t) \
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dispatch_time(DISPATCH_MONOTONICTIME_NOW, (t) * NSEC_PER_USEC)
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#define _dispatch_monotonictime_after_msec(t) \
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dispatch_time(DISPATCH_MONOTONICTIME_NOW, (t) * NSEC_PER_MSEC)
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#define _dispatch_monotonictime_after_sec(t) \
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dispatch_time(DISPATCH_MONOTONICTIME_NOW, (t) * NSEC_PER_SEC)
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#define _dispatch_walltime_after_nsec(t) \
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dispatch_time(DISPATCH_WALLTIME_NOW, (t))
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#define _dispatch_walltime_after_usec(t) \
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dispatch_time(DISPATCH_WALLTIME_NOW, (t) * NSEC_PER_USEC)
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#define _dispatch_walltime_after_msec(t) \
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dispatch_time(DISPATCH_WALLTIME_NOW, (t) * NSEC_PER_MSEC)
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#define _dispatch_walltime_after_sec(t) \
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dispatch_time(DISPATCH_WALLTIME_NOW, (t) * NSEC_PER_SEC)
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#endif // __APPLE__
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#endif
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