192 constexpr sys::fs::mapped_file_region::mapmode Mapmode =
193     sys::fs::mapped_file_region::readonly;
195 constexpr sys::fs::mapped_file_region::mapmode Mapmode<MemoryBuffer> =
196     sys::fs::mapped_file_region::readonly;
198 constexpr sys::fs::mapped_file_region::mapmode Mapmode<WritableMemoryBuffer> =
199     sys::fs::mapped_file_region::priv;
201 constexpr sys::fs::mapped_file_region::mapmode
202     Mapmode<WriteThroughMemoryBuffer> = sys::fs::mapped_file_region::readwrite;
209   sys::fs::mapped_file_region MFR;
212     return Offset & ~(sys::fs::mapped_file_region::alignment() - 1);  in getLegalMapOffset()
224   MemoryBufferMMapFile(bool RequiresNullTerminator, sys::fs::file_t FD, uint64_t Len,  in MemoryBufferMMapFile()
253 getMemoryBufferForStream(sys::fs::file_t FD, const Twine &BufferName) {  in getMemoryBufferForStream()
254   SmallString<sys::fs::DefaultReadChunkSize> Buffer;  in getMemoryBufferForStream()
255   if (Error E = sys::fs::readNativeFileToEOF(FD, Buffer))  in getMemoryBufferForStream()
271 getOpenFileImpl(sys::fs::file_t FD, const Twine &Filename, uint64_t FileSize,
280   Expected<sys::fs::file_t> FDOrErr = sys::fs::openNativeFileForRead(  in getFileAux()
281       Filename, IsText ? sys::fs::OF_TextWithCRLF : sys::fs::OF_None);  in getFileAux()
284   sys::fs::file_t FD = *FDOrErr;  in getFileAux()
287   sys::fs::closeFile(FD);  in getFileAux()
358 static bool shouldUseMmap(sys::fs::file_t FD,  in shouldUseMmap()
384     sys::fs::file_status Status;  in shouldUseMmap()
385     if (sys::fs::status(FD, Status))  in shouldUseMmap()
416   Expected<sys::fs::file_t> FDOrErr = sys::fs::openNativeFileForReadWrite(  in getReadWriteFile()
417       Filename, sys::fs::CD_OpenExisting, sys::fs::OF_None);  in getReadWriteFile()
420   sys::fs::file_t FD = *FDOrErr;  in getReadWriteFile()
427       sys::fs::file_status Status;  in getReadWriteFile()
428       std::error_code EC = sys::fs::status(FD, Status);  in getReadWriteFile()
434       sys::fs::file_type Type = Status.type();  in getReadWriteFile()
435       if (Type != sys::fs::file_type::regular_file &&  in getReadWriteFile()
436           Type != sys::fs::file_type::block_file)  in getReadWriteFile()
468 getOpenFileImpl(sys::fs::file_t FD, const Twine &Filename, uint64_t FileSize,  in getOpenFileImpl()
471   static int PageSize = sys::Process::getPageSizeEstimate();  in getOpenFileImpl()
478       sys::fs::file_status Status;  in getOpenFileImpl()
479       std::error_code EC = sys::fs::status(FD, Status);  in getOpenFileImpl()
486       sys::fs::file_type Type = Status.type();  in getOpenFileImpl()
487       if (Type != sys::fs::file_type::regular_file &&  in getOpenFileImpl()
488           Type != sys::fs::file_type::block_file)  in getOpenFileImpl()
524         sys::fs::readNativeFileSlice(FD, ToRead, Offset);  in getOpenFileImpl()
539 MemoryBuffer::getOpenFile(sys::fs::file_t FD, const Twine &Filename,  in getOpenFile()
548     sys::fs::file_t FD, const Twine &Filename, uint64_t MapSize, int64_t Offset,  in getOpenFileSlice()
560   sys::ChangeStdinMode(sys::fs::OF_Text);  in getSTDIN()
562   return getMemoryBufferForStream(sys::fs::getStdinHandle(), "<stdin>");  in getSTDIN()
567   Expected<sys::fs::file_t> FDOrErr =  in getFileAsStream()
568       sys::fs::openNativeFileForRead(Filename, sys::fs::OF_None);  in getFileAsStream()
571   sys::fs::file_t FD = *FDOrErr;  in getFileAsStream()
574   sys::fs::closeFile(FD);  in getFileAsStream()