block/fvd-ext.h

   1 /*
   2  * Copyright (c) 2010-2011 IBM
   3  *
   4  * Authors:
   5  *         Chunqiang Tang <ctang@us.ibm.com>
   6  *
   7  * This work is licensed under the terms of the GNU GPL, version 2.
   8  * See the COPYING file in the top-level directory.
   9  */
  10
  11 /*=============================================================================
  12  *  A short description: this header file contains functions of the FVD block
  13  *  device driver that are used by other external modules. These functions are
  14  *  mainly for testing and debugging urposes.
  15  *============================================================================*/
  16
  17 #ifndef __fvd_debug_h__
  18 #define __fvd_debug_h__
  19
  20 //#define FVD_DEBUG
  21
  22 int fvd_get_copy_on_read (BlockDriverState *bs);
  23 void fvd_set_copy_on_read (BlockDriverState *bs, int copy_on_read);
  24 void fvd_check_memory_usage (void);
  25 void fvd_init_prefetch(void * bs);
  26 void fvd_enable_host_crash_test (void);
  27
  28 #ifndef TRUE
  29 # define TRUE 1
  30 #endif
  31 #ifndef FALSE
  32 # define FALSE 0
  33 #endif
  34
  35 #ifndef FVD_DEBUG
  36 # define QDEBUG(format,...) do {} while (0)
  37 # define ASSERT(x) do {} while (0)
  38 # define FVD_DEBUG_ACB(...) do {} while (0)
  39 # define QPAUSE(...) do {} while (0)
  40
  41 #else
  42
  43 extern FILE *__fvd_debug_fp;
  44 void init_fvd_debug_fp (void);
  45 void FVD_DEBUG_ACB (void *p);
  46 # define QDEBUG(format,...) \
  47     do { \
  48         if (__fvd_debug_fp==NULL) init_fvd_debug_fp(); \
  49         fprintf (__fvd_debug_fp, format, ##__VA_ARGS__); \
  50         fflush(__fvd_debug_fp); \
  51     } while(0)
  52
  53 # define ASSERT(x) \
  54     do { \
  55         if (!(x)) { \
  56             fprintf (stderr, "Assertion failed in process %d at %s:%d. " \
  57                 "Waiting for debugging...\n", getpid(),__FILE__, __LINE__); \
  58             fgetc (stdin); exit (1);  \
  59         } \
  60     } while (0) \
  61
  62 # define QPAUSE(format,...) \
  63     do { \
  64         printf (format, ##__VA_ARGS__); \
  65         printf (" Pause process %d for debugging...\n", getpid()); \
  66         fgetc (stdin); \
  67     } while (0)
  68
  69 #endif
  70
  71 #endif