184 constexpr sys::fs::mapped_file_region::mapmode Mapmode =
185     sys::fs::mapped_file_region::readonly;
187 constexpr sys::fs::mapped_file_region::mapmode Mapmode<MemoryBuffer> =
188     sys::fs::mapped_file_region::readonly;
190 constexpr sys::fs::mapped_file_region::mapmode Mapmode<WritableMemoryBuffer> =
191     sys::fs::mapped_file_region::priv;
193 constexpr sys::fs::mapped_file_region::mapmode
194     Mapmode<WriteThroughMemoryBuffer> = sys::fs::mapped_file_region::readwrite;
201   sys::fs::mapped_file_region MFR;
204     return Offset & ~(sys::fs::mapped_file_region::alignment() - 1);  in getLegalMapOffset()
216   MemoryBufferMMapFile(bool RequiresNullTerminator, sys::fs::file_t FD, uint64_t Len,  in MemoryBufferMMapFile()
245 getMemoryBufferForStream(sys::fs::file_t FD, const Twine &BufferName) {  in getMemoryBufferForStream()
246   SmallString<sys::fs::DefaultReadChunkSize> Buffer;  in getMemoryBufferForStream()
247   if (Error E = sys::fs::readNativeFileToEOF(FD, Buffer))  in getMemoryBufferForStream()
263 getOpenFileImpl(sys::fs::file_t FD, const Twine &Filename, uint64_t FileSize,
272   Expected<sys::fs::file_t> FDOrErr = sys::fs::openNativeFileForRead(  in getFileAux()
273       Filename, IsText ? sys::fs::OF_TextWithCRLF : sys::fs::OF_None);  in getFileAux()
276   sys::fs::file_t FD = *FDOrErr;  in getFileAux()
279   sys::fs::closeFile(FD);  in getFileAux()
343 static bool shouldUseMmap(sys::fs::file_t FD,  in shouldUseMmap()
369     sys::fs::file_status Status;  in shouldUseMmap()
370     if (sys::fs::status(FD, Status))  in shouldUseMmap()
401   Expected<sys::fs::file_t> FDOrErr = sys::fs::openNativeFileForReadWrite(  in getReadWriteFile()
402       Filename, sys::fs::CD_OpenExisting, sys::fs::OF_None);  in getReadWriteFile()
405   sys::fs::file_t FD = *FDOrErr;  in getReadWriteFile()
412       sys::fs::file_status Status;  in getReadWriteFile()
413       std::error_code EC = sys::fs::status(FD, Status);  in getReadWriteFile()
419       sys::fs::file_type Type = Status.type();  in getReadWriteFile()
420       if (Type != sys::fs::file_type::regular_file &&  in getReadWriteFile()
421           Type != sys::fs::file_type::block_file)  in getReadWriteFile()
453 getOpenFileImpl(sys::fs::file_t FD, const Twine &Filename, uint64_t FileSize,  in getOpenFileImpl()
456   static int PageSize = sys::Process::getPageSizeEstimate();  in getOpenFileImpl()
463       sys::fs::file_status Status;  in getOpenFileImpl()
464       std::error_code EC = sys::fs::status(FD, Status);  in getOpenFileImpl()
471       sys::fs::file_type Type = Status.type();  in getOpenFileImpl()
472       if (Type != sys::fs::file_type::regular_file &&  in getOpenFileImpl()
473           Type != sys::fs::file_type::block_file)  in getOpenFileImpl()
509         sys::fs::readNativeFileSlice(FD, ToRead, Offset);  in getOpenFileImpl()
524 MemoryBuffer::getOpenFile(sys::fs::file_t FD, const Twine &Filename,  in getOpenFile()
533     sys::fs::file_t FD, const Twine &Filename, uint64_t MapSize, int64_t Offset,  in getOpenFileSlice()
545   sys::ChangeStdinMode(sys::fs::OF_Text);  in getSTDIN()
547   return getMemoryBufferForStream(sys::fs::getStdinHandle(), "<stdin>");  in getSTDIN()
552   Expected<sys::fs::file_t> FDOrErr =  in getFileAsStream()
553       sys::fs::openNativeFileForRead(Filename, sys::fs::OF_None);  in getFileAsStream()
556   sys::fs::file_t FD = *FDOrErr;  in getFileAsStream()
559   sys::fs::closeFile(FD);  in getFileAsStream()