src/disk.h

   1 /*
   2  * Copyright (C) 1996-2015 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 06    Disk I/O Routines */
  10
  11 #ifndef SQUID_DISK_H_
  12 #define SQUID_DISK_H_
  13
  14 #include "typedefs.h"
  15
  16 class MemBuf;
  17
  18 // POD
  19 class dread_ctrl
  20 {
  21 public:
  22     int fd;
  23     off_t offset;
  24     int req_len;
  25     char *buf;
  26     int end_of_file;
  27     DRCB *handler;
  28     void *client_data;
  29 };
  30
  31 // POD
  32 class dwrite_q
  33 {
  34 public:
  35     off_t file_offset;
  36     char *buf;
  37     size_t len;
  38     size_t buf_offset;
  39     dwrite_q *next;
  40     FREE *free_func;
  41 };
  42
  43 int file_open(const char *path, int mode);
  44 void file_close(int fd);
  45
  46 /* Adapter file_write for object callbacks */
  47 template <class O>
  48 void
  49 FreeObject(void *address)
  50 {
  51     O *anObject = static_cast <O *>(address);
  52     delete anObject;
  53 }
  54
  55 void file_write(int, off_t, void const *, int len, DWCB *, void *, FREE *);
  56 void file_write_mbuf(int fd, off_t, MemBuf mb, DWCB * handler, void *handler_data);
  57 void file_read(int, char *, int, off_t, DRCB *, void *);
  58 void disk_init(void);
  59 void safeunlink(const char *path, int quiet);
  60 int xrename(const char *from, const char *to); //disk.cc
  61
  62 #endif /* SQUID_DISK_H_ */
  63