diff options
Diffstat (limited to 'lib/System/Unix/MappedFile.inc')
-rw-r--r-- | lib/System/Unix/MappedFile.inc | 97 |
1 files changed, 0 insertions, 97 deletions
diff --git a/lib/System/Unix/MappedFile.inc b/lib/System/Unix/MappedFile.inc deleted file mode 100644 index c85a53d..0000000 --- a/lib/System/Unix/MappedFile.inc +++ /dev/null @@ -1,97 +0,0 @@ -//===- Unix/MappedFile.inc - Unix MappedFile Implementation -----*- C++ -*-===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// This file provides the generic Unix implementation of the MappedFile concept. -// -//===----------------------------------------------------------------------===// - -#include "Unix.h" -#include "llvm/System/Process.h" - -#ifdef HAVE_FCNTL_H -#include <fcntl.h> -#endif - -#ifdef HAVE_SYS_MMAN_H -#include <sys/mman.h> -#endif - -#ifdef HAVE_SYS_STAT_H -#include <sys/stat.h> -#endif - -using namespace llvm; -using namespace sys; - -namespace llvm { - namespace sys { - struct MappedFileInfo { - int FD; - off_t Size; - }; - } -} - -bool MappedFile::initialize(std::string* ErrMsg) { - int FD = ::open(Path.c_str(), O_RDONLY); - if (FD < 0) { - MakeErrMsg(ErrMsg, "can't open file '" + Path.toString() + "'"); - return true; - } - const FileStatus *Status = Path.getFileStatus(false, ErrMsg); - if (!Status) { - ::close(FD); - return true; - } - MapInfo = new MappedFileInfo(); - MapInfo->FD = FD; - MapInfo->Size = Status->getSize(); - return false; -} - -void MappedFile::terminate() { - unmap(); - assert(MapInfo && "MappedFile not initialized"); - ::close(MapInfo->FD); - delete MapInfo; - MapInfo = 0; -} - -void MappedFile::unmap() { - assert(MapInfo && "MappedFile not initialized"); - if (!isMapped()) return; - - ::munmap(BasePtr, MapInfo->Size); - BasePtr = 0; // Mark this as non-mapped. -} - -const void* MappedFile::map(std::string* ErrMsg) { - assert(MapInfo && "MappedFile not initialized"); - if (isMapped()) return BasePtr; - - int flags = MAP_PRIVATE; -#ifdef MAP_FILE - flags |= MAP_FILE; -#endif - size_t PageSize = Process::GetPageSize(); - size_t map_size = ((MapInfo->Size / PageSize)+1) * PageSize; - - BasePtr = ::mmap(0, map_size, PROT_READ, flags, MapInfo->FD, 0); - if (BasePtr == MAP_FAILED) { - MakeErrMsg(ErrMsg, "Can't map file:" + Path.toString()); - return 0; - } - return BasePtr; -} - -size_t MappedFile::size() const { - assert(MapInfo && "MappedFile not initialized"); - return MapInfo->Size; -} - |