src/DiskIO/Blocking/BlockingFile.h

   1 /*
   2  * Copyright (C) 1996-2020 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 #include "typedefs.h" //DRCB, DWCB
  18
  19 class BlockingFile : public DiskFile
  20 {
  21     CBDATA_CLASS(BlockingFile);
  22
  23 public:
  24     BlockingFile(char const *path);
  25     ~BlockingFile();
  26     virtual void open(int flags, mode_t mode, RefCount<IORequestor> callback);
  27     virtual void create(int flags, mode_t mode, RefCount<IORequestor> callback);
  28     virtual void read(ReadRequest *);
  29     virtual void write(WriteRequest *);
  30     virtual void close();
  31     virtual bool error() const;
  32     virtual int getFD() const { return fd;}
  33
  34     virtual bool canRead() const;
  35     virtual bool ioInProgress() const;
  36
  37 private:
  38     static DRCB ReadDone;
  39     static DWCB WriteDone;
  40     int fd;
  41     bool closed;
  42     void error (bool const &);
  43     bool error_;
  44     char const *path_;
  45     RefCount<IORequestor> ioRequestor;
  46     RefCount<ReadRequest> readRequest;
  47     RefCount<WriteRequest> writeRequest;
  48     void doClose();
  49     void readDone(int fd, const char *buf, int len, int errflag);
  50     void writeDone(int fd, int errflag, size_t len);
  51 };
  52
  53 #endif /* SQUID_BLOCKINGFILE_H */
  54