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// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef NET_BASE_TEST_COMPLETION_CALLBACK_H_
#define NET_BASE_TEST_COMPLETION_CALLBACK_H_
#include "base/message_loop.h"
#include "net/base/completion_callback.h"
//-----------------------------------------------------------------------------
// completion callback helper
// A helper class for completion callbacks, designed to make it easy to run
// tests involving asynchronous operations. Just call WaitForResult to wait
// for the asynchronous operation to complete.
//
// NOTE: Since this runs a message loop to wait for the completion callback,
// there could be other side-effects resulting from WaitForResult. For this
// reason, this class is probably not ideal for a general application.
//
class TestCompletionCallback : public CallbackRunner< Tuple1<int> > {
public:
TestCompletionCallback()
: result_(0),
have_result_(false),
waiting_for_result_(false) {
}
int WaitForResult() {
DCHECK(!waiting_for_result_);
while (!have_result_) {
waiting_for_result_ = true;
MessageLoop::current()->Run();
waiting_for_result_ = false;
}
have_result_ = false; // auto-reset for next callback
return result_;
}
private:
virtual void RunWithParams(const Tuple1<int>& params) {
result_ = params.a;
have_result_ = true;
if (waiting_for_result_)
MessageLoop::current()->Quit();
}
int result_;
bool have_result_;
bool waiting_for_result_;
};
#endif // NET_BASE_TEST_COMPLETION_CALLBACK_H_
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