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
  21 public:
  22     BlockingFile(char const *path);
  23     ~BlockingFile();
  24     virtual void open(int flags, mode_t mode, RefCount<IORequestor> callback);
  25     virtual void create(int flags, mode_t mode, RefCount<IORequestor> callback);
  26     virtual void read(ReadRequest *);
  27     virtual void write(WriteRequest *);
  28     virtual void close();
  29     virtual bool error() const;
  30     virtual int getFD() const { return fd;}
  31
  32     virtual bool canRead() const;
  33     virtual bool ioInProgress() const;
  34
  35 private:
  36     static DRCB ReadDone;
  37     static DWCB WriteDone;
  38     int fd;
  39     bool closed;
  40     void error (bool const &);
  41     bool error_;
  42     char const *path_;
  43     RefCount<IORequestor> ioRequestor;
  44     RefCount<ReadRequest> readRequest;
  45     RefCount<WriteRequest> writeRequest;
  46     void doClose();
  47     void readDone(int fd, const char *buf, int len, int errflag);
  48     void writeDone(int fd, int errflag, size_t len);
  49
  50     CBDATA_CLASS2(BlockingFile);
  51 };
  52
  53 #endif /* SQUID_BLOCKINGFILE_H */