TransactionFile.cpp

[詳解]

// ----------------------------------------------------------------------------
 
#include "pch.h"
#include "TransactionFile.h"
 
using namespace alt;
 
// -- TransactionFileUtility ------------------------------------------------
 
BOOL TransactionFileUtility::Init (LPWSTR lpwszDescription)
{
    DWORD dwOption = 0;
 
    _hObject = ::CreateTransaction (
        NULL,
        0,
        dwOption,
        0,
        0,
        INFINITE,
        lpwszDescription);
 
    return _hObject == INVALID_HANDLE_VALUE ? FALSE : TRUE;
}
 
BOOL TransactionFileUtility::Commit () const
{
    return ::CommitTransaction (_hObject);
}
 
BOOL TransactionFileUtility::Rollback () const
{
    return ::RollbackTransaction (_hObject);
}
 
BOOL TransactionFileUtility::CreateFolder (LPCTSTR lpctszFolderName) const
{
    return ::CreateDirectoryTransacted (
        NULL,
        lpctszFolderName,
        NULL,
        _hObject);
}
 
BOOL TransactionFileUtility::Delete (LPCTSTR lpctszFileName) const
{
    return ::DeleteFileTransacted (lpctszFileName, _hObject);
}
 
BOOL TransactionFileUtility::Copy (
    LPCTSTR lpctszSrcFileName, LPCTSTR lpctszDstFileName) const
{
    DWORD dwFlags = COPY_FILE_FAIL_IF_EXISTS;
 
    return ::CopyFileTransacted (
        lpctszSrcFileName,
        lpctszDstFileName,
        NULL,
        NULL,
        NULL,
        dwFlags,
        _hObject);
}
 
BOOL TransactionFileUtility::Move (
    LPCTSTR lpctszSrcFileName, LPCTSTR lpctszDstFileName) const
{
    DWORD dwFlags = MOVEFILE_REPLACE_EXISTING;
 
    return ::MoveFileTransacted (
        lpctszSrcFileName,
        lpctszDstFileName,
        NULL,
        NULL,
        dwFlags,
        _hObject);
}
 
#if defined (_MSC_VER) && (_MSC_VER >= 1910) // VS2017 over
 
BOOL TransactionFileUtility::MakeSymbolicLink (
    LPCTSTR lpctszSrcFileName, LPCTSTR lpctszLinkFileName, BOOL isFile) const
{
    DWORD dwFlags = isFile == TRUE ? 0 : SYMBOLIC_LINK_FLAG_DIRECTORY;
    dwFlags |= SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE;
 
    return ::CreateSymbolicLinkTransacted (
        lpctszLinkFileName,
        lpctszSrcFileName,
        dwFlags,
        _hObject);
}
 
#endif
 
BOOL TransactionFileUtility::MakeHardLink (
    LPCTSTR lpctszSrcFileName, LPCTSTR lpctszLinkFileName) const
{
    return ::CreateHardLinkTransacted (
        lpctszLinkFileName,
        lpctszSrcFileName,
        NULL,
        _hObject);
}
 
// -- TransactionFile ------------------------------------------------
 
BOOL TransactionFile::Create (
    HANDLE hTransaction, LPCTSTR pctszFileName, DWORD dwDesiredAccess,
    DWORD dwShareMode, DWORD dwCreationDisposition)
{
    PSECURITY_ATTRIBUTES pSecurityAttributes = NULL;
    DWORD dwFlagsAndAttributes = FILE_ATTRIBUTE_NORMAL;
    HANDLE hTemplateFile = NULL;
 
    _hObject = ::CreateFileTransacted (
        pctszFileName,
        dwDesiredAccess,
        dwShareMode,
        pSecurityAttributes,
        dwCreationDisposition,
        dwFlagsAndAttributes,
        hTemplateFile,
        hTransaction,
        NULL,
        NULL);
 
    return _hObject == INVALID_HANDLE_VALUE ? FALSE : TRUE;
}