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75 lines
1.6 KiB
C
75 lines
1.6 KiB
C
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// Copyright (c) 2016 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef NET_QUIC_PLATFORM_IMPL_QUIC_MUTEX_IMPL_H_
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#define NET_QUIC_PLATFORM_IMPL_QUIC_MUTEX_IMPL_H_
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#include "base/macros.h"
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#include "base/synchronization/lock.h"
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#include "net/quic/platform/api/quic_export.h"
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#ifndef EXCLUSIVE_LOCK_FUNCTION
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#define EXCLUSIVE_LOCK_FUNCTION(...)
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#endif
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#ifndef UNLOCK_FUNCTION
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#define UNLOCK_FUNCTION(...)
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#endif
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#ifndef SHARED_LOCK_FUNCTION
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#define SHARED_LOCK_FUNCTION(...)
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#endif
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#ifndef ASSERT_SHARED_LOCK
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#define ASSERT_SHARED_LOCK(...)
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#endif
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#ifndef LOCKABLE
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#define LOCKABLE
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#endif
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#ifndef SCOPED_LOCKABLE
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#define SCOPED_LOCKABLE
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#endif
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#ifndef GUARDED_BY
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#define GUARDED_BY(x)
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#endif
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#ifndef SHARED_LOCKS_REQUIRED
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#define SHARED_LOCKS_REQUIRED(...)
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#endif
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namespace net {
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// A class wrapping a non-reentrant mutex.
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class QUIC_EXPORT_PRIVATE QuicLockImpl {
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public:
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QuicLockImpl() = default;
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// Block until lock_ is free, then acquire it exclusively.
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void WriterLock() EXCLUSIVE_LOCK_FUNCTION();
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// Release lock_. Caller must hold it exclusively.
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void WriterUnlock() UNLOCK_FUNCTION();
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// Block until lock_ is free or shared, then acquire a share of it.
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void ReaderLock() SHARED_LOCK_FUNCTION();
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// Release lock_. Caller could hold it in shared mode.
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void ReaderUnlock() UNLOCK_FUNCTION();
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// Not implemented.
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void AssertReaderHeld() const ASSERT_SHARED_LOCK() {}
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private:
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base::Lock lock_;
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DISALLOW_COPY_AND_ASSIGN(QuicLockImpl);
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};
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} // namespace net
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#endif // NET_QUIC_PLATFORM_IMPL_QUIC_MUTEX_IMPL_H_
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