自学教程：C++ HandleError函数代码示例

CLevelDBWrapper::CLevelDBWrapper(const boost::filesystem::path &path, size_t nCacheSize, bool fMemory, bool fWipe) {    penv = NULL;    readoptions.verify_checksums = true;    iteroptions.verify_checksums = true;    iteroptions.fill_cache = false;    syncoptions.sync = true;    options = GetOptions(nCacheSize);    options.create_if_missing = true;    if (fMemory) {        penv = leveldb::NewMemEnv(leveldb::Env::Default());        options.env = penv;    } else {        if (fWipe) {            LogPrintf("Wiping LevelDB in %s/n", path.string().c_str());            leveldb::DestroyDB(path.string(), options);        }        boost::filesystem::create_directory(path);        LogPrintf("Opening LevelDB in %s/n", path.string().c_str());    }    leveldb::Status status = leveldb::DB::Open(options, path.string(), &pdb);    HandleError(status);    LogPrintf("Opened LevelDB successfully/n");}

nsresultSourceBuffer::ExpectLength(size_t aExpectedLength){  MOZ_ASSERT(aExpectedLength > 0, "Zero expected size?");  MutexAutoLock lock(mMutex);  if (MOZ_UNLIKELY(mStatus)) {    MOZ_ASSERT_UNREACHABLE("ExpectLength after SourceBuffer is complete");    return NS_OK;  }  if (MOZ_UNLIKELY(mChunks.Length() > 0)) {    MOZ_ASSERT_UNREACHABLE("Duplicate or post-Append call to ExpectLength");    return NS_OK;  }  if (MOZ_UNLIKELY(NS_FAILED(AppendChunk(CreateChunk(aExpectedLength))))) {    return HandleError(NS_ERROR_OUT_OF_MEMORY);  }  return NS_OK;}

void FOutputDeviceWindowsError::Serialize( const TCHAR* Msg, ELogVerbosity::Type Verbosity, const class FName& Category ){	FPlatformMisc::DebugBreak();   	if( !GIsCriticalError )	{   		const int32 LastError = ::GetLastError();		// First appError.		GIsCriticalError = 1;		TCHAR ErrorBuffer[1024];		ErrorBuffer[0] = 0;		// Windows error.		UE_LOG( LogWindows, Error, TEXT( "Windows GetLastError: %s (%i)" ), FPlatformMisc::GetSystemErrorMessage( ErrorBuffer, 1024, LastError ), LastError );	}	else	{		UE_LOG(LogWindows, Error, TEXT("Error reentered: %s"), Msg );	}	if( GIsGuarded )	{		// Propagate error so structured exception handler can perform necessary work.#if PLATFORM_EXCEPTIONS_DISABLED		FPlatformMisc::DebugBreak();#endif		FPlatformMisc::RaiseException( 1 );	}	else	{		// We crashed outside the guarded code (e.g. appExit).		HandleError();		FPlatformMisc::RequestExit( true );	}}

// Encrypt/Decrypt functionality, called by pager.cvoid* sqlite3Codec(void *pCodec, void *data, Pgno nPageNum, int nMode){    if (pCodec == NULL) //Db not encrypted        return data;    switch(nMode)    {    case 0: // Undo a "case 7" journal file encryption    case 2: // Reload a page    case 3: // Load a page        if (HasReadKey(pCodec))            Decrypt(pCodec, nPageNum, (unsigned char*) data);        break;    case 6: // Encrypt a page for the main database file        if (HasWriteKey(pCodec))            data = Encrypt(pCodec, nPageNum, (unsigned char*) data, 1);        break;    case 7: // Encrypt a page for the journal file    /*    *Under normal circumstances, the readkey is the same as the writekey.  However,    *when the database is being rekeyed, the readkey is not the same as the writekey.    *(The writekey is the "destination key" for the rekey operation and the readkey    *is the key the db is currently encrypted with)    *Therefore, for case 7, when the rollback is being written, always encrypt using    *the database's readkey, which is guaranteed to be the same key that was used to    *read and write the original data.    */        if (HasReadKey(pCodec))            data = Encrypt(pCodec, nPageNum, (unsigned char*) data, 0);        break;    }        HandleError(pCodec);    return data;}

    void TCPSocket::WriteThread()    {        this->mutex.lock();        while (!this->writeQueue.empty())        {            BytesRef data = this->writeQueue.front();            char* buffer = data->Pointer();            size_t remaining = data->Length();            // Release lock while sending data to avoid blocking write().            this->mutex.unlock();            while (true)            {                try                {                    size_t sent = this->socket.sendBytes(buffer, remaining);                    if (sent == remaining) break;                    buffer += sent;                    remaining -= sent;                }                catch (Poco::Exception& e)                {                    HandleError(e);                    return;                }            }            this->mutex.lock();            this->writeQueue.pop();        }        // Notify listeners we have fully drained the queue.        this->mutex.unlock();        FireEvent("drain");    }

voidfind_libdir (void){    const char searchfile[] = "Colour.pal";    /* default_dir will be something like "C://LINCITY1.11" */    const char default_dir[] = "C://LINCITY" VERSION;    /* Check 1: environment variable */    _searchenv (searchfile, "LINCITY_HOME", LIBDIR);    if (*LIBDIR != '/0') {	int endofpath_offset = strlen (LIBDIR) - strlen (searchfile) - 1;	LIBDIR[endofpath_offset] = '/0';	return;    }    /* Check 2: default location */    if ((_access (default_dir, 0)) != -1) {	strcpy (LIBDIR, default_dir);	return;    }    /* Finally give up */    HandleError ("Error. Can't find LINCITY_HOME", FATAL);}

BOOL CUdpCommClient::Push(CUdpPacketNode* pcPktNode){	if (pcPktNode->GetRawLen() >= m_ulMaxSndPktLen)	{		HandleError(OCFCLIENT_ERROR_USERDEF, OCFCLIENT_ERROR_USERDEF_CATEGORY_PKTMAXSIZE, 0, pcPktNode->GetRawLen(), pcPktNode->GetRawBuff());		return FALSE;	}	//	Lock();	m_cSndPktList.Add(pcPktNode);	if (TRUE == m_bConnectFlag && FALSE == m_bWouldBlock)	{		SetEvent(m_hWrEvent);	}	//	Unlock();	return TRUE;}

/*** Prints out the name value records of the matching results.*/int printMetadataResults(hc_nvr_t *nvr, hc_session_t *session){	char **names = NULL;	char **values = NULL;	int count = 0;	hcerr_t hcError = hc_nvr_convert_to_string_arrays(nvr,							  &names,							  &values,							  &count);	if (hcError != HCERR_OK)	{		HandleError(session, hcError);			hc_session_free(session);		return RETURN_STORAGETEK_ERROR;	}	/* if error occurred */	/* Print metadata record. printMetadataRecord is example specific code (in example_metadata.h) */	/* and is not part of the @[email
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