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// Copyright (c) 2011 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.
#include "net/base/winsock_util.h"
#include "base/logging.h"
#include "net/base/net_errors.h"
namespace net {
namespace {
// Prevent the compiler from optimizing away the arguments so they appear
// nicely on the stack in crash dumps.
#pragma warning (disable: 4748)
#pragma optimize( "", off )
// Pass the important values as function arguments so that they are available
// in crash dumps.
void CheckEventWait(WSAEVENT hEvent, DWORD wait_rv, DWORD expected) {
if (wait_rv != expected) {
DWORD err = ERROR_SUCCESS;
if (wait_rv == WAIT_FAILED)
err = GetLastError();
CHECK(false); // Crash.
}
}
#pragma optimize( "", on )
#pragma warning (default: 4748)
} // namespace
void AssertEventNotSignaled(WSAEVENT hEvent) {
DWORD wait_rv = WaitForSingleObject(hEvent, 0);
CheckEventWait(hEvent, wait_rv, WAIT_TIMEOUT);
}
bool ResetEventIfSignaled(WSAEVENT hEvent) {
// TODO(wtc): Remove the CHECKs after enough testing.
DWORD wait_rv = WaitForSingleObject(hEvent, 0);
if (wait_rv == WAIT_TIMEOUT)
return false; // The event object is not signaled.
CheckEventWait(hEvent, wait_rv, WAIT_OBJECT_0);
BOOL ok = WSAResetEvent(hEvent);
CHECK(ok);
return true;
}
} // namespace net
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