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- // Copyright 2021 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #ifndef BASE_TEST_SCOPED_DEV_ZERO_FUCHSIA_H_
- #define BASE_TEST_SCOPED_DEV_ZERO_FUCHSIA_H_
- #include <lib/fdio/namespace.h>
- #include "base/memory/ref_counted.h"
- #include "base/memory/scoped_refptr.h"
- #include "base/threading/sequence_bound.h"
- #include "base/threading/thread.h"
- namespace base {
- // An object that causes /dev/zero to exist during its lifetime. A reference to
- // this class may be held by tests that require access to /dev/zero for the
- // lifetime of that need.
- class ScopedDevZero final : public RefCounted<ScopedDevZero> {
- public:
- REQUIRE_ADOPTION_FOR_REFCOUNTED_TYPE();
- // Returns a reference to the process-global /dev/zero. This must only be
- // called, and the returned reference released, on the main thread. Returns
- // null in case of failure to create the instance. It is good practice for
- // tests to ASSERT the returned pointer.
- static scoped_refptr<ScopedDevZero> Get();
- ScopedDevZero(const ScopedDevZero&) = delete;
- ScopedDevZero operator=(const ScopedDevZero&) = delete;
- private:
- friend class RefCounted<ScopedDevZero>;
- class Server;
- ScopedDevZero();
- ~ScopedDevZero();
- // Spins off the server thread and binds its pesudo-dir to /dev, returning
- // true if all goes well, or false in case of any error.
- bool Initialize();
- // A raw pointer to the process's single instance. Multiple references to this
- // instance may be handed out to consumers.
- static ScopedDevZero* instance_;
- Thread io_thread_;
- fdio_ns_t* global_namespace_ = nullptr;
- SequenceBound<Server> server_;
- };
- } // namespace base
- #endif // BASE_TEST_SCOPED_DEV_ZERO_FUCHSIA_H_
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