src/DiskIO/Blocking/BlockingFile.h

   1 /*
   2  * Copyright (C) 1996-2014 The Squid Software Foundation and contributors
   3  *
   4  * Squid software is distributed under GPLv2+ license and includes
   5  * contributions from numerous individuals and organizations.
   6  * Please see the COPYING and CONTRIBUTORS files for details.
   7  */
   8
   9 /* DEBUG: section 47    Store Directory Routines */
  10
  11 #ifndef SQUID_BLOCKINGFILE_H
  12 #define SQUID_BLOCKINGFILE_H
  13
  14 #include "cbdata.h"
  15 #include "DiskIO/DiskFile.h"
  16 #include "DiskIO/IORequestor.h"
  17
  18 class BlockingFile : public DiskFile
  19 {
  20     CBDATA_CLASS(BlockingFile);
  21
  22 public:
  23     BlockingFile(char const *path);
  24     ~BlockingFile();
  25     virtual void open(int flags, mode_t mode, RefCount<IORequestor> callback);
  26     virtual void create(int flags, mode_t mode, RefCount<IORequestor> callback);
  27     virtual void read(ReadRequest *);
  28     virtual void write(WriteRequest *);
  29     virtual void close();
  30     virtual bool error() const;
  31     virtual int getFD() const { return fd;}
  32
  33     virtual bool canRead() const;
  34     virtual bool ioInProgress() const;
  35
  36 private:
  37     static DRCB ReadDone;
  38     static DWCB WriteDone;
  39     int fd;
  40     bool closed;
  41     void error (bool const &);
  42     bool error_;
  43     char const *path_;
  44     RefCount<IORequestor> ioRequestor;
  45     RefCount<ReadRequest> readRequest;
  46     RefCount<WriteRequest> writeRequest;
  47     void doClose();
  48     void readDone(int fd, const char *buf, int len, int errflag);
  49     void writeDone(int fd, int errflag, size_t len);
  50 };
  51
  52 #endif /* SQUID_BLOCKINGFILE_H */
  53