mojo/edk/test/test_utils.h

// Copyright 2014 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 MOJO_EDK_TEST_TEST_UTILS_H_
#define MOJO_EDK_TEST_TEST_UTILS_H_

#include <stddef.h>

#include "mojo/edk/platform/platform_handle.h"

namespace mojo {
namespace test {

// On success, |bytes_written| is updated to the number of bytes written;
// otherwise it is untouched.
bool BlockingWrite(const platform::PlatformHandle& handle,
                   const void* buffer,
                   size_t bytes_to_write,
                   size_t* bytes_written);

// On success, |bytes_read| is updated to the number of bytes read; otherwise it
// is untouched.
bool BlockingRead(const platform::PlatformHandle& handle,
                  void* buffer,
                  size_t buffer_size,
                  size_t* bytes_read);

// If the read is done successfully or would block, the function returns true
// and updates |bytes_read| to the number of bytes read (0 if the read would
// block); otherwise it returns false and leaves |bytes_read| untouched.
// |handle| must already be in non-blocking mode.
bool NonBlockingRead(const platform::PlatformHandle& handle,
                     void* buffer,
                     size_t buffer_size,
                     size_t* bytes_read);

}  // namespace test
}  // namespace mojo

#endif  // MOJO_EDK_TEST_TEST_UTILS_H_