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![Colin Finck](/assets/img/avatar_default.png)
Use FILE_FLAG_NO_BUFFERING and FILE_FLAG_WRITE_THROUGH in the hope that they prevent journal changes from getting lost. svn path=/trunk/; revision=57077
304 lines
8.3 KiB
C++
304 lines
8.3 KiB
C++
/*
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* PROJECT: ReactOS Automatic Testing Utility
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* LICENSE: GNU GPLv2 or any later version as published by the Free Software Foundation
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* PURPOSE: Class implementing a journaled test list for the Crash Recovery feature
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* COPYRIGHT: Copyright 2009 Colin Finck <colin@reactos.org>
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*/
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#include "precomp.h"
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static const char szJournalHeader[] = "RAT_J-V1";
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static const WCHAR szJournalFileName[] = L"rosautotest.journal";
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/**
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* Constructs a CJournaledTestList object for an associated CTest-derived object.
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*
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* @param Test
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* Pointer to a CTest-derived object, for which this test list shall serve.
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*/
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CJournaledTestList::CJournaledTestList(CTest* Test)
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: CTestList(Test)
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{
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WCHAR JournalFile[MAX_PATH];
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m_hJournal = INVALID_HANDLE_VALUE;
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/* Build the path to the journal file */
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if(SHGetFolderPathW(NULL, CSIDL_APPDATA, NULL, SHGFP_TYPE_CURRENT, JournalFile) != S_OK)
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FATAL("SHGetFolderPathW failed\n");
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m_JournalFile = JournalFile;
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m_JournalFile += L"\\rosautotest\\";
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/* Create the directory if necessary */
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if(GetFileAttributesW(m_JournalFile.c_str()) == INVALID_FILE_ATTRIBUTES)
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CreateDirectoryW(m_JournalFile.c_str(), NULL);
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m_JournalFile += szJournalFileName;
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/* Check if the journal already exists */
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if(GetFileAttributesW(m_JournalFile.c_str()) == INVALID_FILE_ATTRIBUTES)
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WriteInitialJournalFile();
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else
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LoadJournalFile();
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}
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/**
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* Destructs a CJournaledTestList object.
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*/
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CJournaledTestList::~CJournaledTestList()
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{
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if(m_hJournal != INVALID_HANDLE_VALUE)
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CloseHandle(m_hJournal);
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}
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/**
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* Opens the journal file through the CreateFileW API using the m_hJournal handle.
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*
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* @param DesiredAccess
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* dwDesiredAccess parameter passed to CreateFileW
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*
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* @param CreateNew
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* true if the journal file shall be created, false if an existing one shall be opened
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*/
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void
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CJournaledTestList::OpenJournal(DWORD DesiredAccess, bool CreateNew)
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{
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m_hJournal = CreateFileW(
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m_JournalFile.c_str(),
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DesiredAccess,
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0,
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NULL,
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(CreateNew ? CREATE_ALWAYS : OPEN_EXISTING),
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FILE_ATTRIBUTE_NORMAL | FILE_FLAG_NO_BUFFERING | FILE_FLAG_WRITE_THROUGH,
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NULL
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);
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if(m_hJournal == INVALID_HANDLE_VALUE)
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FATAL("CreateFileW failed\n");
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}
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/**
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* Serializes a std::string and writes it into the opened journal file.
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*
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* @param String
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* The std::string to serialize
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*
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* @see UnserializeFromBuffer
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*/
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void
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CJournaledTestList::SerializeIntoJournal(const string& String)
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{
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DWORD BytesWritten;
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WriteFile(m_hJournal, String.c_str(), String.size() + 1, &BytesWritten, NULL);
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FlushFileBuffers(m_hJournal);
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}
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/**
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* Serializes a std::wstring and writes it into the opened journal file.
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*
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* @param String
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* The std::wstring to serialize
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*
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* @see UnserializeFromBuffer
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*/
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void
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CJournaledTestList::SerializeIntoJournal(const wstring& String)
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{
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DWORD BytesWritten;
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WriteFile(m_hJournal, String.c_str(), (String.size() + 1) * sizeof(WCHAR), &BytesWritten, NULL);
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FlushFileBuffers(m_hJournal);
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}
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/**
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* Unserializes the next std::string from the journal buffer.
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* The passed buffer pointer will point at the next element afterwards.
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*
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* @param Buffer
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* Pointer to a pointer to a char array containing the journal buffer
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*
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* @param Output
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* The std::string to unserialize the value into.
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*/
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void
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CJournaledTestList::UnserializeFromBuffer(char** Buffer, string& Output)
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{
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Output = string(*Buffer);
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*Buffer += Output.size() + 1;
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}
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/**
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* Unserializes the next std::wstring from the journal buffer.
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* The passed buffer pointer will point at the next element afterwards.
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*
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* @param Buffer
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* Pointer to a pointer to a char array containing the journal buffer
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*
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* @param Output
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* The std::wstring to unserialize the value into.
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*/
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void
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CJournaledTestList::UnserializeFromBuffer(char** Buffer, wstring& Output)
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{
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Output = wstring((PWSTR)*Buffer);
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*Buffer += (Output.size() + 1) * sizeof(WCHAR);
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}
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/**
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* Gets all tests to be run and writes an initial journal file with this information.
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*/
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void
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CJournaledTestList::WriteInitialJournalFile()
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{
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char TerminatingNull = 0;
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CTestInfo* TestInfo;
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DWORD BytesWritten;
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StringOut("Writing initial journal file...\n\n");
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m_ListIterator = 0;
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/* Store all command lines in the m_List vector */
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while((TestInfo = m_Test->GetNextTestInfo()) != 0)
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{
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m_List.push_back(*TestInfo);
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delete TestInfo;
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}
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/* Serialize the vector and the iterator into a file */
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OpenJournal(GENERIC_WRITE, true);
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WriteFile(m_hJournal, szJournalHeader, sizeof(szJournalHeader), &BytesWritten, NULL);
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WriteFile(m_hJournal, &m_ListIterator, sizeof(m_ListIterator), &BytesWritten, NULL);
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for(size_t i = 0; i < m_List.size(); i++)
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{
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SerializeIntoJournal(m_List[i].CommandLine);
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SerializeIntoJournal(m_List[i].Module);
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SerializeIntoJournal(m_List[i].Test);
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}
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WriteFile(m_hJournal, &TerminatingNull, sizeof(TerminatingNull), &BytesWritten, NULL);
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FlushFileBuffers(m_hJournal);
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CloseHandle(m_hJournal);
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m_hJournal = INVALID_HANDLE_VALUE;
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/* m_ListIterator will be incremented before its first use */
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m_ListIterator = (size_t)-1;
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}
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/**
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* Loads the existing journal file and sets all members to the values saved in that file.
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*/
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void
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CJournaledTestList::LoadJournalFile()
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{
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char* Buffer;
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char* pBuffer;
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char FileHeader[sizeof(szJournalHeader)];
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DWORD BytesRead;
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DWORD RemainingSize;
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StringOut("Loading journal file...\n\n");
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OpenJournal(GENERIC_READ);
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RemainingSize = GetFileSize(m_hJournal, NULL);
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/* Verify the header of the journal file */
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ReadFile(m_hJournal, FileHeader, sizeof(szJournalHeader), &BytesRead, NULL);
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RemainingSize -= BytesRead;
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if(BytesRead != sizeof(szJournalHeader))
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EXCEPTION("Journal file contains no header!\n");
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if(strcmp(FileHeader, szJournalHeader))
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EXCEPTION("Journal file has an unsupported header!\n");
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/* Read the iterator */
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ReadFile(m_hJournal, &m_ListIterator, sizeof(m_ListIterator), &BytesRead, NULL);
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RemainingSize -= BytesRead;
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if(BytesRead != sizeof(m_ListIterator))
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EXCEPTION("Journal file contains no m_ListIterator member!\n");
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/* Read the rest of the file into a buffer */
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Buffer = new char[RemainingSize];
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pBuffer = Buffer;
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ReadFile(m_hJournal, Buffer, RemainingSize, &BytesRead, NULL);
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CloseHandle(m_hJournal);
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m_hJournal = NULL;
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/* Now recreate the m_List vector out of that information */
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while(*pBuffer)
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{
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CTestInfo TestInfo;
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UnserializeFromBuffer(&pBuffer, TestInfo.CommandLine);
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UnserializeFromBuffer(&pBuffer, TestInfo.Module);
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UnserializeFromBuffer(&pBuffer, TestInfo.Test);
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m_List.push_back(TestInfo);
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}
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delete[] Buffer;
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}
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/**
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* Writes the current m_ListIterator value into the journal.
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*/
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void
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CJournaledTestList::UpdateJournal()
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{
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DWORD BytesWritten;
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OpenJournal(GENERIC_WRITE);
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/* Skip the header */
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SetFilePointer(m_hJournal, sizeof(szJournalHeader), NULL, FILE_CURRENT);
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WriteFile(m_hJournal, &m_ListIterator, sizeof(m_ListIterator), &BytesWritten, NULL);
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FlushFileBuffers(m_hJournal);
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CloseHandle(m_hJournal);
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m_hJournal = NULL;
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}
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/**
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* Interface to other classes for receiving information about the next test to be run.
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*
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* @return
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* A pointer to a CTestInfo object, which contains all available information about the next test.
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* The caller needs to free that object.
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*/
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CTestInfo*
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CJournaledTestList::GetNextTestInfo()
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{
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CTestInfo* TestInfo;
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/* Always jump to the next test here.
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- If we're at the beginning of a new test list, the iterator will be set to 0.
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- If we started with a loaded one, we assume that the test m_ListIterator is currently set
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to crashed, so we move to the next test. */
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++m_ListIterator;
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/* Check whether the iterator would already exceed the number of stored elements */
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if(m_ListIterator == m_List.size())
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{
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/* Delete the journal and return no pointer */
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DeleteFileW(m_JournalFile.c_str());
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TestInfo = NULL;
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}
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else
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{
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/* Update the journal with the current iterator and return the test information */
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UpdateJournal();
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TestInfo = new CTestInfo(m_List[m_ListIterator]);
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}
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return TestInfo;
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}
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