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124 lines
3.6 KiB
124 lines
3.6 KiB
/*
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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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/*
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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# error "The MEMORY_DEBUG macro is obsolete.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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* When testing, this global variable stores the location of the
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* pending-byte in the database file.
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*/
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#ifdef SQLITE_TEST
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unsigned int sqlite3_pending_byte = 0x40000000;
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#endif
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int sqlite3_os_trace = 0;
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#ifdef SQLITE_DEBUG
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static int last_page = 0;
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#define SEEK(X) last_page=(X)
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#define TRACE1(X) if( sqlite3_os_trace ) sqlite3DebugPrintf(X)
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#define TRACE2(X,Y) if( sqlite3_os_trace ) sqlite3DebugPrintf(X,Y)
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#define TRACE3(X,Y,Z) if( sqlite3_os_trace ) sqlite3DebugPrintf(X,Y,Z)
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#define TRACE4(X,Y,Z,A) if( sqlite3_os_trace ) sqlite3DebugPrintf(X,Y,Z,A)
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#define TRACE5(X,Y,Z,A,B) if( sqlite3_os_trace ) sqlite3DebugPrintf(X,Y,Z,A,B)
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#define TRACE6(X,Y,Z,A,B,C) if(sqlite3_os_trace) sqlite3DebugPrintf(X,Y,Z,A,B,C)
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#define TRACE7(X,Y,Z,A,B,C,D) \
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if(sqlite3_os_trace) sqlite3DebugPrintf(X,Y,Z,A,B,C,D)
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#else
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#define SEEK(X)
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#define TRACE1(X)
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#define TRACE2(X,Y)
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#define TRACE3(X,Y,Z)
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#define TRACE4(X,Y,Z,A)
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#define TRACE5(X,Y,Z,A,B)
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#define TRACE6(X,Y,Z,A,B,C)
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#define TRACE7(X,Y,Z,A,B,C,D)
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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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__inline__ unsigned long long int hwtime(void){
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unsigned long long int x;
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__asm__("rdtsc\n\t"
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"mov %%edx, %%ecx\n\t"
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:"=A" (x));
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return x;
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}
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static unsigned long long int g_start;
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static unsigned int elapse;
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#define TIMER_START g_start=hwtime()
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#define TIMER_END elapse=hwtime()-g_start
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#define TIMER_ELAPSED elapse
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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 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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#ifdef SQLITE_TEST
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int sqlite3_io_error_pending = 0;
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int sqlite3_diskfull_pending = 0;
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int sqlite3_diskfull = 0;
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#define SimulateIOError(A) \
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if( sqlite3_io_error_pending ) \
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if( sqlite3_io_error_pending-- == 1 ){ local_ioerr(); return A; }
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static void local_ioerr(){
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sqlite3_io_error_pending = 0; /* Really just a place to set a breakpoint */
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}
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#define SimulateDiskfullError \
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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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return SQLITE_FULL; \
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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 SimulateIOError(A)
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#define SimulateDiskfullError
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#endif
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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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#ifdef SQLITE_TEST
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int sqlite3_open_file_count = 0;
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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
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