mirror of
https://gitea.wildfiregames.com/0ad/0ad
synced 2026-06-16 21:34:08 -07:00
8667ea74c8
- directoryPosix: replace most methods with boost filesystem (but not all: the latter cannot efficiently enumerate files AND query their size/mtime) - AllocatorChecker: better name for member functions - file: move the File class here - trace: bugfix - io: move UnalignedWriter to write_buffer.cpp (basically the same thing) - vfs: remove unnecessary "vfs" warts from variable names - vfs_tree: VfsFile now stores single Name/Size/MTime fields instead of the FileInfo record (less clunky) - vfs_path: use boost filesystem's version of the basename/extension functions - lf_alloc: remove (no longer necessary, won't be finished - not worth the trouble) - path_util: remove path_foreach_component (replaced by better path traversal logic) and PathPackage (obsoleted by fs::path) ! resource loading code now receives VfsPath as its filename. there is also OsPath (native absolute path) and Path (relative to binaries/data) - tex is now independent of file loading code; it just en/decodes in-memory buffers - wdll_ver: clean up, use smart pointer to simplify bailout code - wsdl: remove nonexistent failure path from calc_gamma (cruised by here because SDL_SetGamme is failing once after a cold boot at work) - wsnd: simplify OpenAL DLL search, use boost::filesystem - wutil: Wow64 redirection is now packaged in a (RAII) class This was SVN commit r5525.
124 lines
2.8 KiB
C++
124 lines
2.8 KiB
C++
/**
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* =========================================================================
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* File : file.cpp
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* Project : 0 A.D.
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* Description : simple POSIX file wrapper.
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* =========================================================================
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*/
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#include "precompiled.h"
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#include "file.h"
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#include "lib/file/common/file_stats.h"
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#include "lib/file/path.h"
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ERROR_ASSOCIATE(ERR::FILE_ACCESS, "Insufficient access rights to open file", EACCES);
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ERROR_ASSOCIATE(ERR::IO, "Error during IO", EIO);
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File::File()
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{
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}
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File::~File()
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{
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Close();
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}
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LibError File::Open(const Path& pathname, char mode)
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{
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debug_assert(mode == 'w' || mode == 'r');
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m_pathname = pathname;
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m_mode = mode;
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int oflag = (mode == 'r')? O_RDONLY : O_WRONLY|O_CREAT|O_TRUNC;
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#if OS_WIN
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oflag |= O_BINARY_NP;
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#endif
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m_fd = open(m_pathname.external_file_string().c_str(), oflag, S_IRWXO|S_IRWXU|S_IRWXG);
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if(m_fd < 0)
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WARN_RETURN(ERR::FILE_ACCESS);
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stats_open();
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return INFO::OK;
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}
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void File::Close()
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{
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m_mode = '\0';
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close(m_fd);
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m_fd = 0;
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}
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LibError File::Issue(aiocb& req, off_t alignedOfs, u8* alignedBuf, size_t alignedSize) const
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{
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memset(&req, 0, sizeof(req));
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req.aio_lio_opcode = (m_mode == 'w')? LIO_WRITE : LIO_READ;
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req.aio_buf = (volatile void*)alignedBuf;
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req.aio_fildes = m_fd;
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req.aio_offset = alignedOfs;
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req.aio_nbytes = alignedSize;
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struct sigevent* sig = 0; // no notification signal
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aiocb* const reqs = &req;
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if(lio_listio(LIO_NOWAIT, &reqs, 1, sig) != 0)
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return LibError_from_errno();
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return INFO::OK;
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}
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/*static*/ LibError File::WaitUntilComplete(aiocb& req, u8*& alignedBuf, size_t& alignedSize)
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{
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// wait for transfer to complete.
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while(aio_error(&req) == EINPROGRESS)
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{
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aiocb* const reqs = &req;
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aio_suspend(&reqs, 1, (timespec*)0); // wait indefinitely
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}
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const ssize_t bytesTransferred = aio_return(&req);
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if(bytesTransferred == -1) // transfer failed
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WARN_RETURN(ERR::IO);
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alignedBuf = (u8*)req.aio_buf; // cast from volatile void*
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alignedSize = bytesTransferred;
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return INFO::OK;
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}
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LibError File::IO(off_t ofs, u8* buf, size_t size) const
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{
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ScopedIoMonitor monitor;
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lseek(m_fd, ofs, SEEK_SET);
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errno = 0;
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const ssize_t ret = (m_mode == 'w')? write(m_fd, buf, size) : read(m_fd, buf, size);
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if(ret < 0)
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return LibError_from_errno();
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const size_t totalTransferred = (size_t)ret;
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if(totalTransferred != size)
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WARN_RETURN(ERR::IO);
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monitor.NotifyOfSuccess(FI_LOWIO, m_mode, totalTransferred);
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return INFO::OK;
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}
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LibError File::Write(off_t ofs, const u8* buf, size_t size) const
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{
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return IO(ofs, const_cast<u8*>(buf), size);
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}
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LibError File::Read(off_t ofs, u8* buf, size_t size) const
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{
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return IO(ofs, buf, size);
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}
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