106 lines
3.1 KiB
C
106 lines
3.1 KiB
C
/*
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** 2004 May 22
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**
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** The author disclaims copyright to this source code. In place of
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** a legal notice, here is a blessing:
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**
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** May you do good and not evil.
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** May you find forgiveness for yourself and forgive others.
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** May you share freely, never taking more than you give.
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**
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******************************************************************************
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**
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** This file contains macros and a little bit of code that is common to
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** all of the platform-specific files (os_*.c) and is #included into those
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** files.
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**
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** This file should be #included by the os_*.c files only. It is not a
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** general purpose header file.
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*/
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#ifndef _OS_COMMON_H_
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#define _OS_COMMON_H_
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/*
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** At least two bugs have slipped in because we changed the MEMORY_DEBUG
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** macro to SQLITE_DEBUG and some older makefiles have not yet made the
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** switch. The following code should catch this problem at compile-time.
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*/
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#ifdef MEMORY_DEBUG
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# error "The MEMORY_DEBUG macro is obsolete. Use SQLITE_DEBUG instead."
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#endif
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/*
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** Macros for performance tracing. Normally turned off. Only works
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** on i486 hardware.
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*/
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#ifdef SQLITE_PERFORMANCE_TRACE
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/*
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** hwtime.h contains inline assembler code for implementing
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** high-performance timing routines.
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*/
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#include "hwtime.h"
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static sqlite_uint64 g_start;
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static sqlite_uint64 g_elapsed;
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#define TIMER_START g_start=sqlite3Hwtime()
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#define TIMER_END g_elapsed=sqlite3Hwtime()-g_start
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#define TIMER_ELAPSED g_elapsed
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#else
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#define TIMER_START
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#define TIMER_END
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#define TIMER_ELAPSED ((sqlite_uint64)0)
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#endif
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/*
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** If we compile with the SQLITE_TEST macro set, then the following block
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** of code will give us the ability to simulate a disk I/O error. This
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** is used for testing the I/O recovery logic.
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*/
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#if defined(SQLITE_TEST)
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extern int sqlite3_io_error_hit;
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extern int sqlite3_io_error_hardhit;
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extern int sqlite3_io_error_pending;
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extern int sqlite3_io_error_persist;
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extern int sqlite3_io_error_benign;
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extern int sqlite3_diskfull_pending;
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extern int sqlite3_diskfull;
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#define SimulateIOErrorBenign(X) sqlite3_io_error_benign=(X)
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#define SimulateIOError(CODE) \
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if( (sqlite3_io_error_persist && sqlite3_io_error_hit) \
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|| sqlite3_io_error_pending-- == 1 ) \
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{ local_ioerr(); CODE; }
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static void local_ioerr(){
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IOTRACE(("IOERR\n"));
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sqlite3_io_error_hit++;
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if( !sqlite3_io_error_benign ) sqlite3_io_error_hardhit++;
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}
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#define SimulateDiskfullError(CODE) \
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if( sqlite3_diskfull_pending ){ \
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if( sqlite3_diskfull_pending == 1 ){ \
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local_ioerr(); \
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sqlite3_diskfull = 1; \
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sqlite3_io_error_hit = 1; \
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CODE; \
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}else{ \
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sqlite3_diskfull_pending--; \
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} \
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}
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#else
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#define SimulateIOErrorBenign(X)
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#define SimulateIOError(A)
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#define SimulateDiskfullError(A)
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#endif /* defined(SQLITE_TEST) */
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/*
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** When testing, keep a count of the number of open files.
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*/
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#if defined(SQLITE_TEST)
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extern int sqlite3_open_file_count;
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#define OpenCounter(X) sqlite3_open_file_count+=(X)
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#else
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#define OpenCounter(X)
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#endif /* defined(SQLITE_TEST) */
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#endif /* !defined(_OS_COMMON_H_) */
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