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f5bdb858e0
Moved all the threading code to one place. Added explicit support for Darwin, Linux, Pthreads, C11 threads and Win32 threads, including new implementations of Once for Linux, Pthreads, C11 and Win32. rdar://90776105
38 lines
1.2 KiB
C++
38 lines
1.2 KiB
C++
//===--- Once.h - Runtime support for lazy initialization -------*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// Swift runtime functions in support of lazy initialization.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_RUNTIME_ONCE_H
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#define SWIFT_RUNTIME_ONCE_H
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#include "swift/Threading/Once.h"
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namespace swift {
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typedef swift::once_t swift_once_t;
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/// Runs the given function with the given context argument exactly once.
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/// The predicate argument must point to a global or static variable of static
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/// extent of type swift_once_t.
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///
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/// Within the runtime, you should be using swift::once, which will be faster;
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/// this is exposed so that the compiler can generate calls to it.
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SWIFT_RUNTIME_EXPORT
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void swift_once(swift_once_t *predicate, void (*fn)(void *), void *context);
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}
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#endif
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