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Diffstat (limited to 'util/env_win.cc')
| -rw-r--r-- | util/env_win.cc | 1031 |
1 files changed, 1031 insertions, 0 deletions
diff --git a/util/env_win.cc b/util/env_win.cc new file mode 100644 index 0000000000..ef2ecae830 --- /dev/null +++ b/util/env_win.cc @@ -0,0 +1,1031 @@ +// This file contains source that originates from: +// http://code.google.com/p/leveldbwin/source/browse/trunk/win32_impl_src/env_win32.h +// http://code.google.com/p/leveldbwin/source/browse/trunk/win32_impl_src/port_win32.cc +// Those files dont' have any explict license headers but the +// project (http://code.google.com/p/leveldbwin/) lists the 'New BSD License' +// as the license. +#if defined(LEVELDB_PLATFORM_WINDOWS) +#include <map> + + +#include "leveldb/env.h" + +#include "port/port.h" +#include "leveldb/slice.h" +#include "util/logging.h" + +#include <shlwapi.h> +#include <process.h> +#include <cstring> +#include <stdio.h> +#include <errno.h> +#include <io.h> +#include <algorithm> + +#ifdef max +#undef max +#endif + +#ifndef va_copy +#define va_copy(d,s) ((d) = (s)) +#endif + +#if defined DeleteFile +#undef DeleteFile +#endif + +//Declarations +namespace leveldb +{ + +namespace Win32 +{ + +#define DISALLOW_COPY_AND_ASSIGN(TypeName) \ + TypeName(const TypeName&); \ + void operator=(const TypeName&) + +std::string GetCurrentDir(); +std::wstring GetCurrentDirW(); + +static const std::string CurrentDir = GetCurrentDir(); +static const std::wstring CurrentDirW = GetCurrentDirW(); + +std::string& ModifyPath(std::string& path); +std::wstring& ModifyPath(std::wstring& path); + +std::string GetLastErrSz(); +std::wstring GetLastErrSzW(); + +size_t GetPageSize(); + +typedef void (*ScheduleProc)(void*) ; + +struct WorkItemWrapper +{ + WorkItemWrapper(ScheduleProc proc_,void* content_); + ScheduleProc proc; + void* pContent; +}; + +DWORD WINAPI WorkItemWrapperProc(LPVOID pContent); + +class Win32SequentialFile : public SequentialFile +{ +public: + friend class Win32Env; + virtual ~Win32SequentialFile(); + virtual Status Read(size_t n, Slice* result, char* scratch); + virtual Status Skip(uint64_t n); + BOOL isEnable(); +private: + BOOL _Init(); + void _CleanUp(); + Win32SequentialFile(const std::string& fname); + std::string _filename; + ::HANDLE _hFile; + DISALLOW_COPY_AND_ASSIGN(Win32SequentialFile); +}; + +class Win32RandomAccessFile : public RandomAccessFile +{ +public: + friend class Win32Env; + virtual ~Win32RandomAccessFile(); + virtual Status Read(uint64_t offset, size_t n, Slice* result,char* scratch) const; + BOOL isEnable(); +private: + BOOL _Init(LPCWSTR path); + void _CleanUp(); + Win32RandomAccessFile(const std::string& fname); + HANDLE _hFile; + const std::string _filename; + DISALLOW_COPY_AND_ASSIGN(Win32RandomAccessFile); +}; + +class Win32MapFile : public WritableFile +{ +public: + Win32MapFile(const std::string& fname); + + ~Win32MapFile(); + virtual Status Append(const Slice& data); + virtual Status Close(); + virtual Status Flush(); + virtual Status Sync(); + BOOL isEnable(); +private: + std::string _filename; + HANDLE _hFile; + size_t _page_size; + size_t _map_size; // How much extra memory to map at a time + char* _base; // The mapped region + HANDLE _base_handle; + char* _limit; // Limit of the mapped region + char* _dst; // Where to write next (in range [base_,limit_]) + char* _last_sync; // Where have we synced up to + uint64_t _file_offset; // Offset of base_ in file + //LARGE_INTEGER file_offset_; + // Have we done an munmap of unsynced data? + bool _pending_sync; + + // Roundup x to a multiple of y + static size_t _Roundup(size_t x, size_t y); + size_t _TruncateToPageBoundary(size_t s); + bool _UnmapCurrentRegion(); + bool _MapNewRegion(); + DISALLOW_COPY_AND_ASSIGN(Win32MapFile); + BOOL _Init(LPCWSTR Path); +}; + +class Win32FileLock : public FileLock +{ +public: + friend class Win32Env; + virtual ~Win32FileLock(); + BOOL isEnable(); +private: + BOOL _Init(LPCWSTR path); + void _CleanUp(); + Win32FileLock(const std::string& fname); + HANDLE _hFile; + std::string _filename; + DISALLOW_COPY_AND_ASSIGN(Win32FileLock); +}; + +class Win32Logger : public Logger +{ +public: + friend class Win32Env; + virtual ~Win32Logger(); + virtual void Logv(const char* format, va_list ap); +private: + explicit Win32Logger(WritableFile* pFile); + WritableFile* _pFileProxy; + DISALLOW_COPY_AND_ASSIGN(Win32Logger); +}; + +class Win32Env : public Env +{ +public: + Win32Env(); + virtual ~Win32Env(); + virtual Status NewSequentialFile(const std::string& fname, + SequentialFile** result); + + virtual Status NewRandomAccessFile(const std::string& fname, + RandomAccessFile** result); + virtual Status NewWritableFile(const std::string& fname, + WritableFile** result); + + virtual bool FileExists(const std::string& fname); + + virtual Status GetChildren(const std::string& dir, + std::vector<std::string>* result); + + virtual Status DeleteFile(const std::string& fname); + + virtual Status CreateDir(const std::string& dirname); + + virtual Status DeleteDir(const std::string& dirname); + + virtual Status GetFileSize(const std::string& fname, uint64_t* file_size); + + virtual Status RenameFile(const std::string& src, + const std::string& target); + + virtual Status LockFile(const std::string& fname, FileLock** lock); + + virtual Status UnlockFile(FileLock* lock); + + virtual void Schedule( + void (*function)(void* arg), + void* arg); + + virtual void StartThread(void (*function)(void* arg), void* arg); + + virtual Status GetTestDirectory(std::string* path); + + //virtual void Logv(WritableFile* log, const char* format, va_list ap); + + virtual Status NewLogger(const std::string& fname, Logger** result); + + virtual uint64_t NowMicros(); + + virtual void SleepForMicroseconds(int micros); +}; + +void ToWidePath(const std::string& value, std::wstring& target) { + wchar_t buffer[MAX_PATH]; + MultiByteToWideChar(CP_ACP, 0, value.c_str(), -1, buffer, MAX_PATH); + target = buffer; +} + +void ToNarrowPath(const std::wstring& value, std::string& target) { + char buffer[MAX_PATH]; + WideCharToMultiByte(CP_ACP, 0, value.c_str(), -1, buffer, MAX_PATH, NULL, NULL); + target = buffer; +} + +std::string GetCurrentDir() +{ + CHAR path[MAX_PATH]; + ::GetModuleFileNameA(::GetModuleHandleA(NULL),path,MAX_PATH); + *strrchr(path,'\\') = 0; + return std::string(path); +} + +std::wstring GetCurrentDirW() +{ + WCHAR path[MAX_PATH]; + ::GetModuleFileNameW(::GetModuleHandleW(NULL),path,MAX_PATH); + *wcsrchr(path,L'\\') = 0; + return std::wstring(path); +} + +std::string& ModifyPath(std::string& path) +{ + if(path[0] == '/' || path[0] == '\\'){ + path = CurrentDir + path; + } + std::replace(path.begin(),path.end(),'/','\\'); + + return path; +} + +std::wstring& ModifyPath(std::wstring& path) +{ + if(path[0] == L'/' || path[0] == L'\\'){ + path = CurrentDirW + path; + } + std::replace(path.begin(),path.end(),L'/',L'\\'); + return path; +} + +std::string GetLastErrSz() +{ + LPWSTR lpMsgBuf; + FormatMessageW( + FORMAT_MESSAGE_ALLOCATE_BUFFER | + FORMAT_MESSAGE_FROM_SYSTEM | + FORMAT_MESSAGE_IGNORE_INSERTS, + NULL, + GetLastError(), + 0, // Default language + (LPWSTR) &lpMsgBuf, + 0, + NULL + ); + std::string Err; + ToNarrowPath(lpMsgBuf, Err); + LocalFree( lpMsgBuf ); + return Err; +} + +std::wstring GetLastErrSzW() +{ + LPVOID lpMsgBuf; + FormatMessageW( + FORMAT_MESSAGE_ALLOCATE_BUFFER | + FORMAT_MESSAGE_FROM_SYSTEM | + FORMAT_MESSAGE_IGNORE_INSERTS, + NULL, + GetLastError(), + 0, // Default language + (LPWSTR) &lpMsgBuf, + 0, + NULL + ); + std::wstring Err = (LPCWSTR)lpMsgBuf; + LocalFree(lpMsgBuf); + return Err; +} + +WorkItemWrapper::WorkItemWrapper( ScheduleProc proc_,void* content_ ) : + proc(proc_),pContent(content_) +{ + +} + +DWORD WINAPI WorkItemWrapperProc(LPVOID pContent) +{ + WorkItemWrapper* item = static_cast<WorkItemWrapper*>(pContent); + ScheduleProc TempProc = item->proc; + void* arg = item->pContent; + delete item; + TempProc(arg); + return 0; +} + +size_t GetPageSize() +{ + SYSTEM_INFO si; + GetSystemInfo(&si); + return std::max(si.dwPageSize,si.dwAllocationGranularity); +} + +const size_t g_PageSize = GetPageSize(); + + +Win32SequentialFile::Win32SequentialFile( const std::string& fname ) : + _filename(fname),_hFile(NULL) +{ + _Init(); +} + +Win32SequentialFile::~Win32SequentialFile() +{ + _CleanUp(); +} + +Status Win32SequentialFile::Read( size_t n, Slice* result, char* scratch ) +{ + Status sRet; + DWORD hasRead = 0; + if(_hFile && ReadFile(_hFile,scratch,n,&hasRead,NULL) ){ + *result = Slice(scratch,hasRead); + } else { + sRet = Status::IOError(_filename, Win32::GetLastErrSz() ); + } + return sRet; +} + +Status Win32SequentialFile::Skip( uint64_t n ) +{ + Status sRet; + LARGE_INTEGER Move,NowPointer; + Move.QuadPart = n; + if(!SetFilePointerEx(_hFile,Move,&NowPointer,FILE_CURRENT)){ + sRet = Status::IOError(_filename,Win32::GetLastErrSz()); + } + return sRet; +} + +BOOL Win32SequentialFile::isEnable() +{ + return _hFile ? TRUE : FALSE; +} + +BOOL Win32SequentialFile::_Init() +{ + std::wstring path; + ToWidePath(_filename, path); + _hFile = CreateFileW(path.c_str(), + GENERIC_READ, + FILE_SHARE_READ, + NULL, + OPEN_EXISTING, + FILE_ATTRIBUTE_NORMAL, + NULL); + return _hFile ? TRUE : FALSE; +} + +void Win32SequentialFile::_CleanUp() +{ + if(_hFile){ + CloseHandle(_hFile); + _hFile = NULL; + } +} + +Win32RandomAccessFile::Win32RandomAccessFile( const std::string& fname ) : + _filename(fname),_hFile(NULL) +{ + std::wstring path; + ToWidePath(fname, path); + _Init( path.c_str() ); +} + +Win32RandomAccessFile::~Win32RandomAccessFile() +{ + _CleanUp(); +} + +Status Win32RandomAccessFile::Read(uint64_t offset,size_t n,Slice* result,char* scratch) const +{ + Status sRet; + OVERLAPPED ol = {0}; + ZeroMemory(&ol,sizeof(ol)); + ol.Offset = (DWORD)offset; + ol.OffsetHigh = (DWORD)(offset >> 32); + DWORD hasRead = 0; + if(!ReadFile(_hFile,scratch,n,&hasRead,&ol)) + sRet = Status::IOError(_filename,Win32::GetLastErrSz()); + else + *result = Slice(scratch,hasRead); + return sRet; +} + +BOOL Win32RandomAccessFile::_Init( LPCWSTR path ) +{ + BOOL bRet = FALSE; + if(!_hFile) + _hFile = ::CreateFileW(path,GENERIC_READ,FILE_SHARE_READ,NULL,OPEN_EXISTING, + FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS,NULL); + if(!_hFile || _hFile == INVALID_HANDLE_VALUE ) + _hFile = NULL; + else + bRet = TRUE; + return bRet; +} + +BOOL Win32RandomAccessFile::isEnable() +{ + return _hFile ? TRUE : FALSE; +} + +void Win32RandomAccessFile::_CleanUp() +{ + if(_hFile){ + ::CloseHandle(_hFile); + _hFile = NULL; + } +} + +size_t Win32MapFile::_Roundup( size_t x, size_t y ) +{ + return ((x + y - 1) / y) * y; +} + +size_t Win32MapFile::_TruncateToPageBoundary( size_t s ) +{ + s -= (s & (_page_size - 1)); + assert((s % _page_size) == 0); + return s; +} + +bool Win32MapFile::_UnmapCurrentRegion() +{ + bool result = true; + if (_base != NULL) { + if (_last_sync < _limit) { + // Defer syncing this data until next Sync() call, if any + _pending_sync = true; + } + if (!UnmapViewOfFile(_base) || !CloseHandle(_base_handle)) + result = false; + _file_offset += _limit - _base; + _base = NULL; + _base_handle = NULL; + _limit = NULL; + _last_sync = NULL; + _dst = NULL; + // Increase the amount we map the next time, but capped at 1MB + if (_map_size < (1<<20)) { + _map_size *= 2; + } + } + return result; +} + +bool Win32MapFile::_MapNewRegion() +{ + assert(_base == NULL); + //LONG newSizeHigh = (LONG)((file_offset_ + map_size_) >> 32); + //LONG newSizeLow = (LONG)((file_offset_ + map_size_) & 0xFFFFFFFF); + DWORD off_hi = (DWORD)(_file_offset >> 32); + DWORD off_lo = (DWORD)(_file_offset & 0xFFFFFFFF); + LARGE_INTEGER newSize; + newSize.QuadPart = _file_offset + _map_size; + SetFilePointerEx(_hFile, newSize, NULL, FILE_BEGIN); + SetEndOfFile(_hFile); + + _base_handle = CreateFileMappingA( + _hFile, + NULL, + PAGE_READWRITE, + 0, + 0, + 0); + if (_base_handle != NULL) { + _base = (char*) MapViewOfFile(_base_handle, + FILE_MAP_ALL_ACCESS, + off_hi, + off_lo, + _map_size); + if (_base != NULL) { + _limit = _base + _map_size; + _dst = _base; + _last_sync = _base; + return true; + } + } + return false; +} + +Win32MapFile::Win32MapFile( const std::string& fname) : + _filename(fname), + _hFile(NULL), + _page_size(Win32::g_PageSize), + _map_size(_Roundup(65536, Win32::g_PageSize)), + _base(NULL), + _base_handle(NULL), + _limit(NULL), + _dst(NULL), + _last_sync(NULL), + _file_offset(0), + _pending_sync(false) +{ + std::wstring path; + ToWidePath(fname, path); + _Init(path.c_str()); + assert((Win32::g_PageSize & (Win32::g_PageSize - 1)) == 0); +} + +Status Win32MapFile::Append( const Slice& data ) +{ + const char* src = data.data(); + size_t left = data.size(); + Status s; + while (left > 0) { + assert(_base <= _dst); + assert(_dst <= _limit); + size_t avail = _limit - _dst; + if (avail == 0) { + if (!_UnmapCurrentRegion() || + !_MapNewRegion()) { + return Status::IOError("WinMmapFile.Append::UnmapCurrentRegion or MapNewRegion: ", Win32::GetLastErrSz()); + } + } + size_t n = (left <= avail) ? left : avail; + memcpy(_dst, src, n); + _dst += n; + src += n; + left -= n; + } + return s; +} + +Status Win32MapFile::Close() +{ + Status s; + size_t unused = _limit - _dst; + if (!_UnmapCurrentRegion()) { + s = Status::IOError("WinMmapFile.Close::UnmapCurrentRegion: ",Win32::GetLastErrSz()); + } else if (unused > 0) { + // Trim the extra space at the end of the file + LARGE_INTEGER newSize; + newSize.QuadPart = _file_offset - unused; + if (!SetFilePointerEx(_hFile, newSize, NULL, FILE_BEGIN)) { + s = Status::IOError("WinMmapFile.Close::SetFilePointer: ",Win32::GetLastErrSz()); + } else + SetEndOfFile(_hFile); + } + if (!CloseHandle(_hFile)) { + if (s.ok()) { + s = Status::IOError("WinMmapFile.Close::CloseHandle: ", Win32::GetLastErrSz()); + } + } + _hFile = INVALID_HANDLE_VALUE; + _base = NULL; + _base_handle = NULL; + _limit = NULL; + + return s; +} + +Status Win32MapFile::Sync() +{ + Status s; + if (_pending_sync) { + // Some unmapped data was not synced + _pending_sync = false; + if (!FlushFileBuffers(_hFile)) { + s = Status::IOError("WinMmapFile.Sync::FlushFileBuffers: ",Win32::GetLastErrSz()); + } + } + if (_dst > _last_sync) { + // Find the beginnings of the pages that contain the first and last + // bytes to be synced. + size_t p1 = _TruncateToPageBoundary(_last_sync - _base); + size_t p2 = _TruncateToPageBoundary(_dst - _base - 1); + _last_sync = _dst; + if (!FlushViewOfFile(_base + p1, p2 - p1 + _page_size)) { + s = Status::IOError("WinMmapFile.Sync::FlushViewOfFile: ",Win32::GetLastErrSz()); + } + } + return s; +} + +Status Win32MapFile::Flush() +{ + return Status::OK(); +} + +Win32MapFile::~Win32MapFile() +{ + if (_hFile != INVALID_HANDLE_VALUE) { + Win32MapFile::Close(); + } +} + +BOOL Win32MapFile::_Init( LPCWSTR Path ) +{ + DWORD Flag = PathFileExistsW(Path) ? OPEN_EXISTING : CREATE_ALWAYS; + _hFile = CreateFileW(Path, + GENERIC_READ | GENERIC_WRITE, + FILE_SHARE_READ|FILE_SHARE_DELETE|FILE_SHARE_WRITE, + NULL, + Flag, + FILE_ATTRIBUTE_NORMAL, + NULL); + if(!_hFile || _hFile == INVALID_HANDLE_VALUE) + return FALSE; + else + return TRUE; +} + +BOOL Win32MapFile::isEnable() +{ + return _hFile ? TRUE : FALSE; +} + +Win32FileLock::Win32FileLock( const std::string& fname ) : + _hFile(NULL),_filename(fname) +{ + std::wstring path; + ToWidePath(fname, path); + _Init(path.c_str()); +} + +Win32FileLock::~Win32FileLock() +{ + _CleanUp(); +} + +BOOL Win32FileLock::_Init( LPCWSTR path ) +{ + BOOL bRet = FALSE; + if(!_hFile) + _hFile = ::CreateFileW(path,0,0,NULL,CREATE_ALWAYS,FILE_ATTRIBUTE_NORMAL,NULL); + if(!_hFile || _hFile == INVALID_HANDLE_VALUE ){ + _hFile = NULL; + } + else + bRet = TRUE; + return bRet; +} + +void Win32FileLock::_CleanUp() +{ + ::CloseHandle(_hFile); + _hFile = NULL; +} + +BOOL Win32FileLock::isEnable() +{ + return _hFile ? TRUE : FALSE; +} + +Win32Logger::Win32Logger(WritableFile* pFile) : _pFileProxy(pFile) +{ + assert(_pFileProxy); +} + +Win32Logger::~Win32Logger() +{ + if(_pFileProxy) + delete _pFileProxy; +} + +void Win32Logger::Logv( const char* format, va_list ap ) +{ + uint64_t thread_id = ::GetCurrentThreadId(); + + // We try twice: the first time with a fixed-size stack allocated buffer, + // and the second time with a much larger dynamically allocated buffer. + char buffer[500]; + for (int iter = 0; iter < 2; iter++) { + char* base; + int bufsize; + if (iter == 0) { + bufsize = sizeof(buffer); + base = buffer; + } else { + bufsize = 30000; + base = new char[bufsize]; + } + char* p = base; + char* limit = base + bufsize; + + SYSTEMTIME st; + GetLocalTime(&st); + p += snprintf(p, limit - p, + "%04d/%02d/%02d-%02d:%02d:%02d.%06d %llx ", + int(st.wYear), + int(st.wMonth), + int(st.wDay), + int(st.wHour), + int(st.wMinute), + int(st.wMinute), + int(st.wMilliseconds), + static_cast<long long unsigned int>(thread_id)); + + // Print the message + if (p < limit) { + va_list backup_ap; + va_copy(backup_ap, ap); + p += vsnprintf(p, limit - p, format, backup_ap); + va_end(backup_ap); + } + + // Truncate to available space if necessary + if (p >= limit) { + if (iter == 0) { + continue; // Try again with larger buffer + } else { + p = limit - 1; + } + } + + // Add newline if necessary + if (p == base || p[-1] != '\n') { + *p++ = '\n'; + } + + assert(p <= limit); + DWORD hasWritten = 0; + if(_pFileProxy){ + _pFileProxy->Append(Slice(base, p - base)); + _pFileProxy->Flush(); + } + if (base != buffer) { + delete[] base; + } + break; + } +} + +bool Win32Env::FileExists(const std::string& fname) +{ + std::string path = fname; + std::wstring wpath; + ToWidePath(ModifyPath(path), wpath); + return ::PathFileExistsW(wpath.c_str()) ? true : false; +} + +Status Win32Env::GetChildren(const std::string& dir, std::vector<std::string>* result) +{ + Status sRet; + ::WIN32_FIND_DATAW wfd; + std::string path = dir; + ModifyPath(path); + path += "\\*.*"; + std::wstring wpath; + ToWidePath(path, wpath); + + ::HANDLE hFind = ::FindFirstFileW(wpath.c_str() ,&wfd); + if(hFind && hFind != INVALID_HANDLE_VALUE){ + BOOL hasNext = TRUE; + std::string child; + while(hasNext){ + ToNarrowPath(wfd.cFileName, child); + if(child != ".." && child != ".") { + result->push_back(child); + } + hasNext = ::FindNextFileW(hFind,&wfd); + } + ::FindClose(hFind); + } + else + sRet = Status::IOError(dir,"Could not get children."); + return sRet; +} + +void Win32Env::SleepForMicroseconds( int micros ) +{ + ::Sleep((micros + 999) /1000); +} + + +Status Win32Env::DeleteFile( const std::string& fname ) +{ + Status sRet; + std::string path = fname; + std::wstring wpath; + ToWidePath(ModifyPath(path), wpath); + + if(!::DeleteFileW(wpath.c_str())) { + sRet = Status::IOError(path, "Could not delete file."); + } + return sRet; +} + +Status Win32Env::GetFileSize( const std::string& fname, uint64_t* file_size ) +{ + Status sRet; + std::string path = fname; + std::wstring wpath; + ToWidePath(ModifyPath(path), wpath); + + HANDLE file = ::CreateFileW(wpath.c_str(), + GENERIC_READ,FILE_SHARE_READ,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL); + LARGE_INTEGER li; + if(::GetFileSizeEx(file,&li)){ + *file_size = (uint64_t)li.QuadPart; + }else + sRet = Status::IOError(path,"Could not get the file size."); + CloseHandle(file); + return sRet; +} + +Status Win32Env::RenameFile( const std::string& src, const std::string& target ) +{ + Status sRet; + std::string src_path = src; + std::wstring wsrc_path; + ToWidePath(ModifyPath(src_path), wsrc_path); + std::string target_path = target; + std::wstring wtarget_path; + ToWidePath(ModifyPath(target_path), wtarget_path); + + if(!MoveFileW(wsrc_path.c_str(), wtarget_path.c_str() ) ){ + DWORD err = GetLastError(); + if(err == 0x000000b7){ + if(!::DeleteFileW(wtarget_path.c_str() ) ) + sRet = Status::IOError(src, "Could not rename file."); + else if(!::MoveFileW(wsrc_path.c_str(), + wtarget_path.c_str() ) ) + sRet = Status::IOError(src, "Could not rename file."); + } + } + return sRet; +} + +Status Win32Env::LockFile( const std::string& fname, FileLock** lock ) +{ + Status sRet; + std::string path = fname; + ModifyPath(path); + Win32FileLock* _lock = new Win32FileLock(path); + if(!_lock->isEnable()){ + delete _lock; + *lock = NULL; + sRet = Status::IOError(path, "Could not lock file."); + } + else + *lock = _lock; + return sRet; +} + +Status Win32Env::UnlockFile( FileLock* lock ) +{ + Status sRet; + delete lock; + return sRet; +} + +void Win32Env::Schedule( void (*function)(void* arg), void* arg ) +{ + QueueUserWorkItem(Win32::WorkItemWrapperProc, + new Win32::WorkItemWrapper(function,arg), + WT_EXECUTEDEFAULT); +} + +void Win32Env::StartThread( void (*function)(void* arg), void* arg ) +{ + ::_beginthread(function,0,arg); +} + +Status Win32Env::GetTestDirectory( std::string* path ) +{ + Status sRet; + WCHAR TempPath[MAX_PATH]; + ::GetTempPathW(MAX_PATH,TempPath); + ToNarrowPath(TempPath, *path); + path->append("leveldb\\test\\"); + ModifyPath(*path); + return sRet; +} + +uint64_t Win32Env::NowMicros() +{ +#ifndef USE_VISTA_API +#define GetTickCount64 GetTickCount +#endif + return (uint64_t)(GetTickCount64()*1000); +} + +static Status CreateDirInner( const std::string& dirname ) +{ + Status sRet; + DWORD attr = ::GetFileAttributes(dirname.c_str()); + if (attr == INVALID_FILE_ATTRIBUTES) { // doesn't exist: + std::size_t slash = dirname.find_last_of("\\"); + if (slash != std::string::npos){ + sRet = CreateDirInner(dirname.substr(0, slash)); + if (!sRet.ok()) return sRet; + } + BOOL result = ::CreateDirectory(dirname.c_str(), NULL); + if (result == FALSE) { + sRet = Status::IOError(dirname, "Could not create directory."); + return sRet; + } + } + return sRet; +} + +Status Win32Env::CreateDir( const std::string& dirname ) +{ + std::string path = dirname; + if(path[path.length() - 1] != '\\'){ + path += '\\'; + } + ModifyPath(path); + + return CreateDirInner(path); +} + +Status Win32Env::DeleteDir( const std::string& dirname ) +{ + Status sRet; + std::wstring path; + ToWidePath(dirname, path); + ModifyPath(path); + if(!::RemoveDirectoryW( path.c_str() ) ){ + sRet = Status::IOError(dirname, "Could not delete directory."); + } + return sRet; +} + +Status Win32Env::NewSequentialFile( const std::string& fname, SequentialFile** result ) +{ + Status sRet; + std::string path = fname; + ModifyPath(path); + Win32SequentialFile* pFile = new Win32SequentialFile(path); + if(pFile->isEnable()){ + *result = pFile; + }else { + delete pFile; + sRet = Status::IOError(path, Win32::GetLastErrSz()); + } + return sRet; +} + +Status Win32Env::NewRandomAccessFile( const std::string& fname, RandomAccessFile** result ) +{ + Status sRet; + std::string path = fname; + Win32RandomAccessFile* pFile = new Win32RandomAccessFile(ModifyPath(path)); + if(!pFile->isEnable()){ + delete pFile; + *result = NULL; + sRet = Status::IOError(path, Win32::GetLastErrSz()); + }else + *result = pFile; + return sRet; +} + +Status Win32Env::NewLogger( const std::string& fname, Logger** result ) +{ + Status sRet; + std::string path = fname; + Win32MapFile* pMapFile = new Win32MapFile(ModifyPath(path)); + if(!pMapFile->isEnable()){ + delete pMapFile; + *result = NULL; + sRet = Status::IOError(path,"could not create a logger."); + }else + *result = new Win32Logger(pMapFile); + return sRet; +} + +Status Win32Env::NewWritableFile( const std::string& fname, WritableFile** result ) +{ + Status sRet; + std::string path = fname; + Win32MapFile* pFile = new Win32MapFile(ModifyPath(path)); + if(!pFile->isEnable()){ + *result = NULL; + sRet = Status::IOError(fname,Win32::GetLastErrSz()); + }else + *result = pFile; + return sRet; +} + +Win32Env::Win32Env() +{ + +} + +Win32Env::~Win32Env() +{ + +} + + +} // Win32 namespace + +static port::OnceType once = LEVELDB_ONCE_INIT; +static Env* default_env; +static void InitDefaultEnv() { default_env = new Win32::Win32Env(); } + +Env* Env::Default() { + port::InitOnce(&once, InitDefaultEnv); + return default_env; +} + +} // namespace leveldb + +#endif // defined(LEVELDB_PLATFORM_WINDOWS) |