171 constexpr sys::fs::mapped_file_region::mapmode Mapmode =
172     sys::fs::mapped_file_region::readonly;
174 constexpr sys::fs::mapped_file_region::mapmode Mapmode<MemoryBuffer> =
175     sys::fs::mapped_file_region::readonly;
177 constexpr sys::fs::mapped_file_region::mapmode Mapmode<WritableMemoryBuffer> =
178     sys::fs::mapped_file_region::priv;
180 constexpr sys::fs::mapped_file_region::mapmode
181     Mapmode<WriteThroughMemoryBuffer> = sys::fs::mapped_file_region::readwrite;
188   sys::fs::mapped_file_region MFR;
191     return Offset & ~(sys::fs::mapped_file_region::alignment() - 1);  in getLegalMapOffset()
203   MemoryBufferMMapFile(bool RequiresNullTerminator, sys::fs::file_t FD, uint64_t Len,  in MemoryBufferMMapFile()
231 getMemoryBufferForStream(sys::fs::file_t FD, const Twine &BufferName) {  in getMemoryBufferForStream()
232   SmallString<sys::fs::DefaultReadChunkSize> Buffer;  in getMemoryBufferForStream()
233   if (Error E = sys::fs::readNativeFileToEOF(FD, Buffer))  in getMemoryBufferForStream()
247 getOpenFileImpl(sys::fs::file_t FD, const Twine &Filename, uint64_t FileSize,
255   Expected<sys::fs::file_t> FDOrErr = sys::fs::openNativeFileForRead(  in getFileAux()
256       Filename, IsText ? sys::fs::OF_TextWithCRLF : sys::fs::OF_None);  in getFileAux()
259   sys::fs::file_t FD = *FDOrErr;  in getFileAux()
262   sys::fs::closeFile(FD);  in getFileAux()
318 static bool shouldUseMmap(sys::fs::file_t FD,  in shouldUseMmap()
344     sys::fs::file_status Status;  in shouldUseMmap()
345     if (sys::fs::status(FD, Status))  in shouldUseMmap()
376   Expected<sys::fs::file_t> FDOrErr = sys::fs::openNativeFileForReadWrite(  in getReadWriteFile()
377       Filename, sys::fs::CD_OpenExisting, sys::fs::OF_None);  in getReadWriteFile()
380   sys::fs::file_t FD = *FDOrErr;  in getReadWriteFile()
387       sys::fs::file_status Status;  in getReadWriteFile()
388       std::error_code EC = sys::fs::status(FD, Status);  in getReadWriteFile()
394       sys::fs::file_type Type = Status.type();  in getReadWriteFile()
395       if (Type != sys::fs::file_type::regular_file &&  in getReadWriteFile()
396           Type != sys::fs::file_type::block_file)  in getReadWriteFile()
428 getOpenFileImpl(sys::fs::file_t FD, const Twine &Filename, uint64_t FileSize,  in getOpenFileImpl()
431   static int PageSize = sys::Process::getPageSizeEstimate();  in getOpenFileImpl()
438       sys::fs::file_status Status;  in getOpenFileImpl()
439       std::error_code EC = sys::fs::status(FD, Status);  in getOpenFileImpl()
446       sys::fs::file_type Type = Status.type();  in getOpenFileImpl()
447       if (Type != sys::fs::file_type::regular_file &&  in getOpenFileImpl()
448           Type != sys::fs::file_type::block_file)  in getOpenFileImpl()
483         sys::fs::readNativeFileSlice(FD, ToRead, Offset);  in getOpenFileImpl()
498 MemoryBuffer::getOpenFile(sys::fs::file_t FD, const Twine &Filename, uint64_t FileSize,  in getOpenFile()
505 MemoryBuffer::getOpenFileSlice(sys::fs::file_t FD, const Twine &Filename, uint64_t MapSize,  in getOpenFileSlice()
517   sys::ChangeStdinMode(sys::fs::OF_Text);  in getSTDIN()
519   return getMemoryBufferForStream(sys::fs::getStdinHandle(), "<stdin>");  in getSTDIN()
524   Expected<sys::fs::file_t> FDOrErr =  in getFileAsStream()
525       sys::fs::openNativeFileForRead(Filename, sys::fs::OF_None);  in getFileAsStream()
528   sys::fs::file_t FD = *FDOrErr;  in getFileAsStream()
531   sys::fs::closeFile(FD);  in getFileAsStream()