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7392c8d01d
* [WebAssembly] Add no-op MutexWASI.h implementation * Update wording of header comment in MutexWASI.h
70 lines
2.6 KiB
C++
70 lines
2.6 KiB
C++
//===--- MutexWASI.h - -----------------------------------------*- 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 - 2020 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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// No-op implementation of locks for the WebAssembly System Interface. The
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// implementation does not need to perform locking, because as of January 2020
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// WebAssembly does not support threads.
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// See the current status at https://github.com/WebAssembly/proposals and
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// https://github.com/webassembly/threads
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_RUNTIME_MUTEX_WASI_H
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#define SWIFT_RUNTIME_MUTEX_WASI_H
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namespace swift {
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typedef void* ConditionHandle;
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typedef void* MutexHandle;
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typedef void* ReadWriteLockHandle;
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#define SWIFT_CONDITION_SUPPORTS_CONSTEXPR 1
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#define SWIFT_MUTEX_SUPPORTS_CONSTEXPR 1
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#define SWIFT_READWRITELOCK_SUPPORTS_CONSTEXPR 1
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struct ConditionPlatformHelper {
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static constexpr ConditionHandle staticInit() {
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return nullptr;
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};
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static void init(ConditionHandle &condition) {}
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static void destroy(ConditionHandle &condition) {}
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static void notifyOne(ConditionHandle &condition) {}
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static void notifyAll(ConditionHandle &condition) {}
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static void wait(ConditionHandle &condition, MutexHandle &mutex);
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};
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struct MutexPlatformHelper {
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static constexpr MutexHandle staticInit() { return nullptr; }
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static void init(MutexHandle &mutex, bool checked = false) {}
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static void destroy(MutexHandle &mutex) {}
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static void lock(MutexHandle &mutex) {}
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static void unlock(MutexHandle &mutex) {}
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static bool try_lock(MutexHandle &mutex) { return true; }
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static void unsafeLock(MutexHandle &mutex) {}
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static void unsafeUnlock(MutexHandle &mutex) {}
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};
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struct ReadWriteLockPlatformHelper {
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static constexpr ReadWriteLockHandle staticInit() { return nullptr; }
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static void init(ReadWriteLockHandle &rwlock) {}
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static void destroy(ReadWriteLockHandle &rwlock) {}
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static void readLock(ReadWriteLockHandle &rwlock) {}
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static bool try_readLock(ReadWriteLockHandle &rwlock) { return true; }
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static void readUnlock(ReadWriteLockHandle &rwlock) {}
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static void writeLock(ReadWriteLockHandle &rwlock) {}
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static bool try_writeLock(ReadWriteLockHandle &rwlock) { return true; }
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static void writeUnlock(ReadWriteLockHandle &rwlock) {}
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};
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}
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#endif
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