/ Artifact [744286a2]

Artifact 744286a27de55c52f1b18921e8d17abbf7fafc0f:

** 2004 May 22
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
** This file contains macros and a little bit of code that is common to
** all of the platform-specific files (os_*.c) and is #included into those
** files.
** This file should be #included by the os_*.c files only.  It is not a
** general purpose header file.

** Macros for performance tracing.  Normally turned off.  Only works
** on i486 hardware.
#if 0
static int last_page = 0;
__inline__ unsigned long long int hwtime(void){
  unsigned long long int x;
          "mov %%edx, %%ecx\n\t"
          :"=A" (x));
  return x;
static unsigned long long int g_start;
static unsigned int elapse;
#define TIMER_START       g_start=hwtime()
#define TIMER_END         elapse=hwtime()-g_start
#define SEEK(X)           last_page=(X)
#define TRACE1(X)         fprintf(stderr,X)
#define TRACE2(X,Y)       fprintf(stderr,X,Y)
#define TRACE3(X,Y,Z)     fprintf(stderr,X,Y,Z)
#define TRACE4(X,Y,Z,A)   fprintf(stderr,X,Y,Z,A)
#define TRACE5(X,Y,Z,A,B) fprintf(stderr,X,Y,Z,A,B)
#define TIMER_END
#define SEEK(X)
#define TRACE1(X)
#define TRACE2(X,Y)
#define TRACE3(X,Y,Z)
#define TRACE4(X,Y,Z,A)
#define TRACE5(X,Y,Z,A,B)

** If we compile with the SQLITE_TEST macro set, then the following block
** of code will give us the ability to simulate a disk I/O error.  This
** is used for testing the I/O recovery logic.
int sqlite3_io_error_pending = 0;
#define SimulateIOError(A)  \
   if( sqlite3_io_error_pending ) \
     if( sqlite3_io_error_pending-- == 1 ){ local_ioerr(); return A; }
static void local_ioerr(){
  sqlite3_io_error_pending = 0;  /* Really just a place to set a breakpoint */
#define SimulateIOError(A)

** When testing, keep a count of the number of open files.
int sqlite3_open_file_count = 0;
#define OpenCounter(X)  sqlite3_open_file_count+=(X)
#define OpenCounter(X)