mirror of
https://github.com/apple/swift.git
synced 2025-12-14 20:36:38 +01:00
c329bf6c4a
Symbols from the backdeploy libraries shouldn't be exported by dylibs. Also found an undefined declaration (asyncMainDrainQueue) and a duplicate declaration for `swift_task_getCurrent`, so those were cleaned up.
54 lines
1.5 KiB
C++
54 lines
1.5 KiB
C++
//===--- Once.h - Runtime support for lazy initialization -------*- C++ -*-===//
|
|
//
|
|
// This source file is part of the Swift.org open source project
|
|
//
|
|
// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
|
|
// Licensed under Apache License v2.0 with Runtime Library Exception
|
|
//
|
|
// See https://swift.org/LICENSE.txt for license information
|
|
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Swift runtime functions in support of lazy initialization.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef SWIFT_RUNTIME_ONCE_BACKDEPLOY56_H
|
|
#define SWIFT_RUNTIME_ONCE_BACKDEPLOY56_H
|
|
|
|
#include "swift/Runtime/HeapObject.h"
|
|
#include <mutex>
|
|
|
|
namespace swift {
|
|
|
|
#ifdef SWIFT_STDLIB_SINGLE_THREADED_RUNTIME
|
|
|
|
typedef bool swift_once_t;
|
|
|
|
#elif defined(__APPLE__)
|
|
|
|
// On OS X and iOS, swift_once_t matches dispatch_once_t.
|
|
typedef long swift_once_t;
|
|
|
|
#elif defined(__CYGWIN__)
|
|
|
|
// On Cygwin, std::once_flag can not be used because it is larger than the
|
|
// platform word.
|
|
typedef uintptr_t swift_once_t;
|
|
#else
|
|
|
|
// On other platforms swift_once_t is std::once_flag
|
|
typedef std::once_flag swift_once_t;
|
|
|
|
#endif
|
|
|
|
/// Runs the given function with the given context argument exactly once.
|
|
/// The predicate argument must point to a global or static variable of static
|
|
/// extent of type swift_once_t.
|
|
void swift_once(swift_once_t *predicate, void (*fn)(void *), void *context);
|
|
|
|
}
|
|
|
|
#endif // SWIFT_RUNTIME_ONCE_BACKDEPLOY56_H
|