169 constexpr sys::fs::mapped_file_region::mapmode Mapmode =
170     sys::fs::mapped_file_region::readonly;
172 constexpr sys::fs::mapped_file_region::mapmode Mapmode<MemoryBuffer> =
173     sys::fs::mapped_file_region::readonly;
175 constexpr sys::fs::mapped_file_region::mapmode Mapmode<WritableMemoryBuffer> =
176     sys::fs::mapped_file_region::priv;
178 constexpr sys::fs::mapped_file_region::mapmode
179     Mapmode<WriteThroughMemoryBuffer> = sys::fs::mapped_file_region::readwrite;
186   sys::fs::mapped_file_region MFR;
189     return Offset & ~(sys::fs::mapped_file_region::alignment() - 1);  in getLegalMapOffset()
201   MemoryBufferMMapFile(bool RequiresNullTerminator, sys::fs::file_t FD, uint64_t Len,  in MemoryBufferMMapFile()
227 getMemoryBufferForStream(sys::fs::file_t FD, const Twine &BufferName) {  in getMemoryBufferForStream()
233     Expected<size_t> ReadBytes = sys::fs::readNativeFile(  in getMemoryBufferForStream()
254 getOpenFileImpl(sys::fs::file_t FD, const Twine &Filename, uint64_t FileSize,
262   Expected<sys::fs::file_t> FDOrErr = sys::fs::openNativeFileForRead(  in getFileAux()
263       Filename, IsText ? sys::fs::OF_TextWithCRLF : sys::fs::OF_None);  in getFileAux()
266   sys::fs::file_t FD = *FDOrErr;  in getFileAux()
269   sys::fs::closeFile(FD);  in getFileAux()
323 static bool shouldUseMmap(sys::fs::file_t FD,  in shouldUseMmap()
349     sys::fs::file_status Status;  in shouldUseMmap()
350     if (sys::fs::status(FD, Status))  in shouldUseMmap()
381   Expected<sys::fs::file_t> FDOrErr = sys::fs::openNativeFileForReadWrite(  in getReadWriteFile()
382       Filename, sys::fs::CD_OpenExisting, sys::fs::OF_None);  in getReadWriteFile()
385   sys::fs::file_t FD = *FDOrErr;  in getReadWriteFile()
392       sys::fs::file_status Status;  in getReadWriteFile()
393       std::error_code EC = sys::fs::status(FD, Status);  in getReadWriteFile()
399       sys::fs::file_type Type = Status.type();  in getReadWriteFile()
400       if (Type != sys::fs::file_type::regular_file &&  in getReadWriteFile()
401           Type != sys::fs::file_type::block_file)  in getReadWriteFile()
433 getOpenFileImpl(sys::fs::file_t FD, const Twine &Filename, uint64_t FileSize,  in getOpenFileImpl()
436   static int PageSize = sys::Process::getPageSizeEstimate();  in getOpenFileImpl()
443       sys::fs::file_status Status;  in getOpenFileImpl()
444       std::error_code EC = sys::fs::status(FD, Status);  in getOpenFileImpl()
451       sys::fs::file_type Type = Status.type();  in getOpenFileImpl()
452       if (Type != sys::fs::file_type::regular_file &&  in getOpenFileImpl()
453           Type != sys::fs::file_type::block_file)  in getOpenFileImpl()
488         sys::fs::readNativeFileSlice(FD, ToRead, Offset);  in getOpenFileImpl()
503 MemoryBuffer::getOpenFile(sys::fs::file_t FD, const Twine &Filename, uint64_t FileSize,  in getOpenFile()
510 MemoryBuffer::getOpenFileSlice(sys::fs::file_t FD, const Twine &Filename, uint64_t MapSize,  in getOpenFileSlice()
522   sys::ChangeStdinMode(sys::fs::OF_Text);  in getSTDIN()
524   return getMemoryBufferForStream(sys::fs::getStdinHandle(), "<stdin>");  in getSTDIN()
529   Expected<sys::fs::file_t> FDOrErr =  in getFileAsStream()
530       sys::fs::openNativeFileForRead(Filename, sys::fs::OF_None);  in getFileAsStream()
533   sys::fs::file_t FD = *FDOrErr;  in getFileAsStream()
536   sys::fs::closeFile(FD);  in getFileAsStream()