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Begin adding the failsafe() macro. (CVS 5383)

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FossilOrigin-Name: 8aae4fe7e702b7636fba1fd609a0ca22fdcc3371
This commit is contained in:
drh
2008-07-09 13:28:53 +00:00
parent 474b7cc785
commit 22c2403a1c
9 changed files with 76 additions and 31 deletions
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26
src/sqliteInt.h
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@@ -11,7 +11,7 @@
*************************************************************************
** Internal interface definitions for SQLite.
**
** @(#) $Id: sqliteInt.h,v 1.738 2008/07/08 23:40:20 drh Exp $
** @(#) $Id: sqliteInt.h,v 1.739 2008/07/09 13:28:54 drh Exp $
*/
#ifndef _SQLITEINT_H_
#define _SQLITEINT_H_
@@ -62,6 +62,26 @@
# define testcase(X)
#endif
/*
** The failsafe() macro is used to test for error conditions that
** should never occur. This is similar to assert() except that with
** failsafe() the application attempts to recover gracefully rather
** than abort. If a error condition is detected, a global flag is
** set to the "Id" prior to recovery in order to alert the application
** to the error condition.
**
** The Id should be a random integer. The idea behind the Id is that
** failsafe() faults in the field can be mapped back to specific failsafe()
** macros, even if line numbers and filenames have changed.
**
** The test condition is argument Cond. The recovery action is
** argument Action.
*/
#ifdef SQLITE_COVERAGE_TEST
# define failsafe(Cond,Id,Action)
#else
# define failsafe(Cond,Id,Action) if( Cond ){ sqlite3Failsafe(Id); Action; }
#endif
/*
** The macro unlikely() is a hint that surrounds a boolean
@@ -1756,6 +1776,7 @@ struct Sqlite3Config {
int bCoreMutex; /* True to enable core mutexing */
int bFullMutex; /* True to enable full mutexing */
int mxStrlen; /* Maximum string length */
int iFailsafe; /* Id of failed failsafe() */
sqlite3_mem_methods m; /* Low-level memory allocation interface */
sqlite3_mutex_methods mutex; /* Low-level mutex interface */
void *pHeap; /* Heap storage space */
@@ -1791,10 +1812,8 @@ struct Sqlite3Config {
#ifdef SQLITE_DEBUG
int sqlite3Corrupt(void);
# define SQLITE_CORRUPT_BKPT sqlite3Corrupt()
# define DEBUGONLY(X) X
#else
# define SQLITE_CORRUPT_BKPT SQLITE_CORRUPT
# define DEBUGONLY(X)
#endif
/*
@@ -2001,6 +2020,7 @@ void sqlite3RegisterDateTimeFunctions(sqlite3*);
#endif
int sqlite3SafetyCheckOk(sqlite3*);
int sqlite3SafetyCheckSickOrOk(sqlite3*);
void sqlite3Failsafe(int);
void sqlite3ChangeCookie(Parse*, int);
void sqlite3MaterializeView(Parse*, Select*, Expr*, int);