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ef8825bfe6
LLVM has removed llvm::Optional, move over to std::optional. Also clang-format to fix up all the renamed #includes.
81 lines
2.2 KiB
C++
81 lines
2.2 KiB
C++
//===--- Thread.h - Thread abstraction ------------------------ -*- 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) 2022 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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// Provides an abstract Thread class that identifies a system thread,
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// and can fetch the current and main threads as well as being comparable
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// with other Thread instances.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_THREADING_THREAD_H
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#define SWIFT_THREADING_THREAD_H
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#include <optional>
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#include "Impl.h"
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namespace swift {
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/// Identifies a thread
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class Thread {
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public:
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using Id = threading_impl::thread_id;
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using StackBounds = threading_impl::stack_bounds;
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private:
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Id id_;
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public:
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Thread() {}
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explicit Thread(Id platformId) : id_(platformId) {}
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Thread(const Thread &other) : id_(other.id_) {}
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Thread(Thread &&other) : id_(std::move(other.id_)) {}
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Thread &operator=(const Thread &other) {
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id_ = other.id_;
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return *this;
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}
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Thread &operator=(Thread &&other) {
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id_ = other.id_;
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return *this;
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}
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/// Returns the platform specific thread ID
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Id platformThreadId() const { return id_; }
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/// Returns the currently executing thread
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static Thread current() {
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return Thread(threading_impl::thread_get_current());
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}
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/// Returns true iff executed on the main thread
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static bool onMainThread() { return threading_impl::thread_is_main(); }
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/// Returns true if the two Thread values are equal
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bool operator==(const Thread &other) const {
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return threading_impl::threads_same(id_, other.id_);
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}
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bool operator!=(const Thread &other) const {
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return !threading_impl::threads_same(id_, other.id_);
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}
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// Retrieve the bounds of the current thread's stack
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static std::optional<StackBounds> stackBounds() {
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return threading_impl::thread_get_current_stack_bounds();
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}
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};
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} // namespace swift
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#endif // SWIFT_THREADING_THREAD_H
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