1031 lines
25 KiB
C++
1031 lines
25 KiB
C++
// This file contains source that originates from:
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// http://code.google.com/p/leveldbwin/source/browse/trunk/win32_impl_src/env_win32.h
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// http://code.google.com/p/leveldbwin/source/browse/trunk/win32_impl_src/port_win32.cc
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// Those files dont' have any explict license headers but the
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// project (http://code.google.com/p/leveldbwin/) lists the 'New BSD License'
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// as the license.
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#if defined(LEVELDB_PLATFORM_WINDOWS)
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#include <map>
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#include "leveldb/env.h"
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#include "port/port.h"
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#include "leveldb/slice.h"
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#include "util/logging.h"
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#include <shlwapi.h>
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#include <process.h>
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#include <cstring>
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#include <stdio.h>
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#include <errno.h>
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#include <io.h>
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#include <algorithm>
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#ifdef max
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#undef max
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#endif
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#ifndef va_copy
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#define va_copy(d,s) ((d) = (s))
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#endif
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#if defined DeleteFile
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#undef DeleteFile
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#endif
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//Declarations
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namespace leveldb
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{
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namespace Win32
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{
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#define DISALLOW_COPY_AND_ASSIGN(TypeName) \
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TypeName(const TypeName&); \
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void operator=(const TypeName&)
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std::string GetCurrentDir();
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std::wstring GetCurrentDirW();
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static const std::string CurrentDir = GetCurrentDir();
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static const std::wstring CurrentDirW = GetCurrentDirW();
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std::string& ModifyPath(std::string& path);
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std::wstring& ModifyPath(std::wstring& path);
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std::string GetLastErrSz();
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std::wstring GetLastErrSzW();
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size_t GetPageSize();
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typedef void (*ScheduleProc)(void*) ;
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struct WorkItemWrapper
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{
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WorkItemWrapper(ScheduleProc proc_,void* content_);
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ScheduleProc proc;
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void* pContent;
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};
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DWORD WINAPI WorkItemWrapperProc(LPVOID pContent);
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class Win32SequentialFile : public SequentialFile
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{
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public:
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friend class Win32Env;
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virtual ~Win32SequentialFile();
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virtual Status Read(size_t n, Slice* result, char* scratch);
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virtual Status Skip(uint64_t n);
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BOOL isEnable();
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private:
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BOOL _Init();
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void _CleanUp();
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Win32SequentialFile(const std::string& fname);
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std::string _filename;
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::HANDLE _hFile;
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DISALLOW_COPY_AND_ASSIGN(Win32SequentialFile);
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};
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class Win32RandomAccessFile : public RandomAccessFile
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{
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public:
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friend class Win32Env;
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virtual ~Win32RandomAccessFile();
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virtual Status Read(uint64_t offset, size_t n, Slice* result,char* scratch) const;
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BOOL isEnable();
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private:
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BOOL _Init(LPCWSTR path);
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void _CleanUp();
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Win32RandomAccessFile(const std::string& fname);
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HANDLE _hFile;
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const std::string _filename;
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DISALLOW_COPY_AND_ASSIGN(Win32RandomAccessFile);
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};
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class Win32MapFile : public WritableFile
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{
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public:
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Win32MapFile(const std::string& fname);
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~Win32MapFile();
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virtual Status Append(const Slice& data);
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virtual Status Close();
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virtual Status Flush();
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virtual Status Sync();
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BOOL isEnable();
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private:
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std::string _filename;
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HANDLE _hFile;
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size_t _page_size;
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size_t _map_size; // How much extra memory to map at a time
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char* _base; // The mapped region
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HANDLE _base_handle;
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char* _limit; // Limit of the mapped region
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char* _dst; // Where to write next (in range [base_,limit_])
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char* _last_sync; // Where have we synced up to
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uint64_t _file_offset; // Offset of base_ in file
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//LARGE_INTEGER file_offset_;
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// Have we done an munmap of unsynced data?
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bool _pending_sync;
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// Roundup x to a multiple of y
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static size_t _Roundup(size_t x, size_t y);
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size_t _TruncateToPageBoundary(size_t s);
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bool _UnmapCurrentRegion();
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bool _MapNewRegion();
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DISALLOW_COPY_AND_ASSIGN(Win32MapFile);
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BOOL _Init(LPCWSTR Path);
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};
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class Win32FileLock : public FileLock
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{
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public:
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friend class Win32Env;
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virtual ~Win32FileLock();
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BOOL isEnable();
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private:
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BOOL _Init(LPCWSTR path);
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void _CleanUp();
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Win32FileLock(const std::string& fname);
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HANDLE _hFile;
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std::string _filename;
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DISALLOW_COPY_AND_ASSIGN(Win32FileLock);
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};
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class Win32Logger : public Logger
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{
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public:
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friend class Win32Env;
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virtual ~Win32Logger();
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virtual void Logv(const char* format, va_list ap);
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private:
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explicit Win32Logger(WritableFile* pFile);
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WritableFile* _pFileProxy;
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DISALLOW_COPY_AND_ASSIGN(Win32Logger);
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};
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class Win32Env : public Env
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{
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public:
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Win32Env();
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virtual ~Win32Env();
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virtual Status NewSequentialFile(const std::string& fname,
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SequentialFile** result);
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virtual Status NewRandomAccessFile(const std::string& fname,
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RandomAccessFile** result);
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virtual Status NewWritableFile(const std::string& fname,
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WritableFile** result);
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virtual bool FileExists(const std::string& fname);
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virtual Status GetChildren(const std::string& dir,
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std::vector<std::string>* result);
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virtual Status DeleteFile(const std::string& fname);
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virtual Status CreateDir(const std::string& dirname);
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virtual Status DeleteDir(const std::string& dirname);
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virtual Status GetFileSize(const std::string& fname, uint64_t* file_size);
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virtual Status RenameFile(const std::string& src,
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const std::string& target);
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virtual Status LockFile(const std::string& fname, FileLock** lock);
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virtual Status UnlockFile(FileLock* lock);
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virtual void Schedule(
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void (*function)(void* arg),
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void* arg);
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virtual void StartThread(void (*function)(void* arg), void* arg);
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virtual Status GetTestDirectory(std::string* path);
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//virtual void Logv(WritableFile* log, const char* format, va_list ap);
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virtual Status NewLogger(const std::string& fname, Logger** result);
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virtual uint64_t NowMicros();
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virtual void SleepForMicroseconds(int micros);
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};
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void ToWidePath(const std::string& value, std::wstring& target) {
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wchar_t buffer[MAX_PATH];
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MultiByteToWideChar(CP_ACP, 0, value.c_str(), -1, buffer, MAX_PATH);
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target = buffer;
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}
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void ToNarrowPath(const std::wstring& value, std::string& target) {
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char buffer[MAX_PATH];
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WideCharToMultiByte(CP_ACP, 0, value.c_str(), -1, buffer, MAX_PATH, NULL, NULL);
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target = buffer;
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}
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std::string GetCurrentDir()
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{
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CHAR path[MAX_PATH];
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::GetModuleFileNameA(::GetModuleHandleA(NULL),path,MAX_PATH);
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*strrchr(path,'\\') = 0;
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return std::string(path);
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}
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std::wstring GetCurrentDirW()
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{
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WCHAR path[MAX_PATH];
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::GetModuleFileNameW(::GetModuleHandleW(NULL),path,MAX_PATH);
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*wcsrchr(path,L'\\') = 0;
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return std::wstring(path);
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}
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std::string& ModifyPath(std::string& path)
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{
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if(path[0] == '/' || path[0] == '\\'){
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path = CurrentDir + path;
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}
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std::replace(path.begin(),path.end(),'/','\\');
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return path;
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}
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std::wstring& ModifyPath(std::wstring& path)
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{
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if(path[0] == L'/' || path[0] == L'\\'){
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path = CurrentDirW + path;
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}
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std::replace(path.begin(),path.end(),L'/',L'\\');
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return path;
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}
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std::string GetLastErrSz()
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{
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LPWSTR lpMsgBuf;
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FormatMessageW(
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FORMAT_MESSAGE_ALLOCATE_BUFFER |
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FORMAT_MESSAGE_FROM_SYSTEM |
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FORMAT_MESSAGE_IGNORE_INSERTS,
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NULL,
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GetLastError(),
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0, // Default language
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(LPWSTR) &lpMsgBuf,
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0,
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NULL
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);
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std::string Err;
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ToNarrowPath(lpMsgBuf, Err);
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LocalFree( lpMsgBuf );
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return Err;
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}
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std::wstring GetLastErrSzW()
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{
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LPVOID lpMsgBuf;
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FormatMessageW(
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FORMAT_MESSAGE_ALLOCATE_BUFFER |
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FORMAT_MESSAGE_FROM_SYSTEM |
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FORMAT_MESSAGE_IGNORE_INSERTS,
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NULL,
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GetLastError(),
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0, // Default language
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(LPWSTR) &lpMsgBuf,
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0,
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NULL
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);
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std::wstring Err = (LPCWSTR)lpMsgBuf;
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LocalFree(lpMsgBuf);
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return Err;
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}
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WorkItemWrapper::WorkItemWrapper( ScheduleProc proc_,void* content_ ) :
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proc(proc_),pContent(content_)
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{
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}
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DWORD WINAPI WorkItemWrapperProc(LPVOID pContent)
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{
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WorkItemWrapper* item = static_cast<WorkItemWrapper*>(pContent);
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ScheduleProc TempProc = item->proc;
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void* arg = item->pContent;
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delete item;
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TempProc(arg);
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return 0;
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}
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size_t GetPageSize()
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{
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SYSTEM_INFO si;
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GetSystemInfo(&si);
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return std::max(si.dwPageSize,si.dwAllocationGranularity);
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}
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const size_t g_PageSize = GetPageSize();
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Win32SequentialFile::Win32SequentialFile( const std::string& fname ) :
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_filename(fname),_hFile(NULL)
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{
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_Init();
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}
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Win32SequentialFile::~Win32SequentialFile()
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{
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_CleanUp();
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}
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Status Win32SequentialFile::Read( size_t n, Slice* result, char* scratch )
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{
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Status sRet;
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DWORD hasRead = 0;
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if(_hFile && ReadFile(_hFile,scratch,n,&hasRead,NULL) ){
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*result = Slice(scratch,hasRead);
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} else {
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sRet = Status::IOError(_filename, Win32::GetLastErrSz() );
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}
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return sRet;
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}
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Status Win32SequentialFile::Skip( uint64_t n )
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{
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Status sRet;
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LARGE_INTEGER Move,NowPointer;
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Move.QuadPart = n;
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if(!SetFilePointerEx(_hFile,Move,&NowPointer,FILE_CURRENT)){
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sRet = Status::IOError(_filename,Win32::GetLastErrSz());
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}
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return sRet;
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}
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BOOL Win32SequentialFile::isEnable()
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{
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return _hFile ? TRUE : FALSE;
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}
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BOOL Win32SequentialFile::_Init()
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{
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std::wstring path;
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ToWidePath(_filename, path);
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_hFile = CreateFileW(path.c_str(),
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GENERIC_READ,
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FILE_SHARE_READ,
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NULL,
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OPEN_EXISTING,
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FILE_ATTRIBUTE_NORMAL,
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NULL);
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return _hFile ? TRUE : FALSE;
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}
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void Win32SequentialFile::_CleanUp()
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{
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if(_hFile){
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CloseHandle(_hFile);
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_hFile = NULL;
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}
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}
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Win32RandomAccessFile::Win32RandomAccessFile( const std::string& fname ) :
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_filename(fname),_hFile(NULL)
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{
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std::wstring path;
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ToWidePath(fname, path);
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_Init( path.c_str() );
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}
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Win32RandomAccessFile::~Win32RandomAccessFile()
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{
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_CleanUp();
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}
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Status Win32RandomAccessFile::Read(uint64_t offset,size_t n,Slice* result,char* scratch) const
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{
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Status sRet;
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OVERLAPPED ol = {0};
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ZeroMemory(&ol,sizeof(ol));
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ol.Offset = (DWORD)offset;
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ol.OffsetHigh = (DWORD)(offset >> 32);
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DWORD hasRead = 0;
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if(!ReadFile(_hFile,scratch,n,&hasRead,&ol))
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sRet = Status::IOError(_filename,Win32::GetLastErrSz());
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else
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*result = Slice(scratch,hasRead);
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return sRet;
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}
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BOOL Win32RandomAccessFile::_Init( LPCWSTR path )
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{
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BOOL bRet = FALSE;
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if(!_hFile)
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_hFile = ::CreateFileW(path,GENERIC_READ,FILE_SHARE_READ,NULL,OPEN_EXISTING,
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FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS,NULL);
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if(!_hFile || _hFile == INVALID_HANDLE_VALUE )
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_hFile = NULL;
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else
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bRet = TRUE;
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return bRet;
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}
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BOOL Win32RandomAccessFile::isEnable()
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{
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return _hFile ? TRUE : FALSE;
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}
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void Win32RandomAccessFile::_CleanUp()
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{
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if(_hFile){
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::CloseHandle(_hFile);
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_hFile = NULL;
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}
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}
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size_t Win32MapFile::_Roundup( size_t x, size_t y )
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{
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return ((x + y - 1) / y) * y;
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}
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size_t Win32MapFile::_TruncateToPageBoundary( size_t s )
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{
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s -= (s & (_page_size - 1));
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assert((s % _page_size) == 0);
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return s;
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}
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bool Win32MapFile::_UnmapCurrentRegion()
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{
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bool result = true;
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if (_base != NULL) {
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if (_last_sync < _limit) {
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// Defer syncing this data until next Sync() call, if any
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_pending_sync = true;
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}
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if (!UnmapViewOfFile(_base) || !CloseHandle(_base_handle))
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result = false;
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_file_offset += _limit - _base;
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_base = NULL;
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_base_handle = NULL;
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_limit = NULL;
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_last_sync = NULL;
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_dst = NULL;
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// Increase the amount we map the next time, but capped at 1MB
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if (_map_size < (1<<20)) {
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_map_size *= 2;
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}
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}
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return result;
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}
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bool Win32MapFile::_MapNewRegion()
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{
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assert(_base == NULL);
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//LONG newSizeHigh = (LONG)((file_offset_ + map_size_) >> 32);
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//LONG newSizeLow = (LONG)((file_offset_ + map_size_) & 0xFFFFFFFF);
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DWORD off_hi = (DWORD)(_file_offset >> 32);
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DWORD off_lo = (DWORD)(_file_offset & 0xFFFFFFFF);
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LARGE_INTEGER newSize;
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newSize.QuadPart = _file_offset + _map_size;
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SetFilePointerEx(_hFile, newSize, NULL, FILE_BEGIN);
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SetEndOfFile(_hFile);
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_base_handle = CreateFileMappingA(
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_hFile,
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NULL,
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PAGE_READWRITE,
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0,
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0,
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0);
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if (_base_handle != NULL) {
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_base = (char*) MapViewOfFile(_base_handle,
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FILE_MAP_ALL_ACCESS,
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off_hi,
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off_lo,
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_map_size);
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if (_base != NULL) {
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_limit = _base + _map_size;
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_dst = _base;
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_last_sync = _base;
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return true;
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}
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}
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return false;
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}
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Win32MapFile::Win32MapFile( const std::string& fname) :
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_filename(fname),
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_hFile(NULL),
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_page_size(Win32::g_PageSize),
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_map_size(_Roundup(65536, Win32::g_PageSize)),
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_base(NULL),
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_base_handle(NULL),
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_limit(NULL),
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_dst(NULL),
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_last_sync(NULL),
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_file_offset(0),
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_pending_sync(false)
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{
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std::wstring path;
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ToWidePath(fname, path);
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_Init(path.c_str());
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assert((Win32::g_PageSize & (Win32::g_PageSize - 1)) == 0);
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}
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Status Win32MapFile::Append( const Slice& data )
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{
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const char* src = data.data();
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size_t left = data.size();
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Status s;
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while (left > 0) {
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assert(_base <= _dst);
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assert(_dst <= _limit);
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size_t avail = _limit - _dst;
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if (avail == 0) {
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if (!_UnmapCurrentRegion() ||
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!_MapNewRegion()) {
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return Status::IOError("WinMmapFile.Append::UnmapCurrentRegion or MapNewRegion: ", Win32::GetLastErrSz());
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}
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}
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size_t n = (left <= avail) ? left : avail;
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memcpy(_dst, src, n);
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_dst += n;
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src += n;
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left -= n;
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}
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return s;
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}
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Status Win32MapFile::Close()
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|
{
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Status s;
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|
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)
|