SQLite

2.8.9

#!/usr/bin/wish
#
# A GUI shell for SQLite
#

# The following code is slighly modified from the original.  See comments
# for the modifications...
############################################################################
# A console widget for Tcl/Tk.  Invoke console:create with a window name,
# a prompt string, and a title to get a new top-level window that allows 
# the user to enter tcl commands.  This is mainly useful for testing and
# debugging.
#
# Copyright (C) 1998, 1999 D. Richard Hipp
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Library General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Library General Public License for more details.
# 
# You should have received a copy of the GNU Library General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA  02111-1307, USA.
#
# Author contact information:
#   drh@acm.org
#   http://www.hwaci.com/drh/

# Create a console widget named $w.  The prompt string is $prompt.
# The title at the top of the window is $title
#
proc console:create {w prompt title} {
  upvar #0 $w.t v
  if {[winfo exists $w]} {destroy $w}
  if {[info exists v]} {unset v}
  toplevel $w
  wm title $w $title
  wm iconname $w $title
  frame $w.mb -bd 2 -relief raised
  pack $w.mb -side top -fill x
  menubutton $w.mb.file -text File -menu $w.mb.file.m
  menubutton $w.mb.edit -text Edit -menu $w.mb.edit.m
  pack $w.mb.file $w.mb.edit -side left -padx 8 -pady 1
  set m [menu $w.mb.file.m]
  # $m add command -label {Source...} -command "console:SourceFile $w.t"
  # $m add command -label {Save As...} -command "console:SaveFile $w.t"
  # $m add separator
  $m add command -label {Close} -command "destroy $w"
  $m add command -label {Exit} -command exit
  console:create_child $w $prompt $w.mb.edit.m
}

# This routine creates a console as a child window within a larger
# window.  It also creates an edit menu named "$editmenu" if $editmenu!="".
# The calling function is responsible for posting the edit menu.
#
proc console:create_child {w prompt editmenu} {
  upvar #0 $w.t v
  if {$editmenu!=""} {
    set m [menu $editmenu]
    $m add command -label Cut -command "console:Cut $w.t"
    $m add command -label Copy -command "console:Copy $w.t"
    $m add command -label Paste -command "console:Paste $w.t"
    $m add command -label {Clear Screen} -command "console:Clear $w.t"
    $m add separator
    $m add command -label {Source...} -command "console:SourceFile $w.t"
    $m add command -label {Save As...} -command "console:SaveFile $w.t"
    catch {$editmenu config -postcommand "console:EnableEditMenu $w"}
  }
  scrollbar $w.sb -orient vertical -command "$w.t yview"
  pack $w.sb -side right -fill y
  text $w.t -font fixed -yscrollcommand "$w.sb set"
  pack $w.t -side right -fill both -expand 1
  bindtags $w.t Console
  set v(editmenu) $editmenu
  set v(text) $w.t
  set v(history) 0
  set v(historycnt) 0
  set v(current) -1
  set v(prompt) $prompt
  set v(prior) {}
  set v(plength) [string length $v(prompt)]
  set v(x) 0
  set v(y) 0
  $w.t mark set insert end
  $w.t tag config ok -foreground blue
  $w.t tag config err -foreground red
  $w.t insert end $v(prompt)
  $w.t mark set out 1.0
  catch {rename puts console:oldputs$w}
  proc puts args [format {
    if {![winfo exists %s]} {
      rename puts {}
      rename console:oldputs%s puts
      return [uplevel #0 puts $args]
    }
    switch -glob -- "[llength $args] $args" {
      {1 *} {
         set msg [lindex $args 0]\n
         set tag ok
      }
      {2 stdout *} {
         set msg [lindex $args 1]\n
         set tag ok
      }
      {2 stderr *} {
         set msg [lindex $args 1]\n
         set tag err
      }
      {2 -nonewline *} {
         set msg [lindex $args 1]
         set tag ok
      }
      {3 -nonewline stdout *} {
         set msg [lindex $args 2]
         set tag ok
      }
      {3 -nonewline stderr *} {
         set msg [lindex $args 2]
         set tag err
      }
      default {
        uplevel #0 console:oldputs%s $args
        return
      }
    }
    console:Puts %s $msg $tag
  } $w $w $w $w.t]
  after idle "focus $w.t"
}

bind Console <1> {console:Button1 %W %x %y}
bind Console <B1-Motion> {console:B1Motion %W %x %y}
bind Console <B1-Leave> {console:B1Leave %W %x %y}
bind Console <B1-Enter> {console:cancelMotor %W}
bind Console <ButtonRelease-1> {console:cancelMotor %W}
bind Console <KeyPress> {console:Insert %W %A}
bind Console <Left> {console:Left %W}
bind Console <Control-b> {console:Left %W}
bind Console <Right> {console:Right %W}
bind Console <Control-f> {console:Right %W}
bind Console <BackSpace> {console:Backspace %W}
bind Console <Control-h> {console:Backspace %W}
bind Console <Delete> {console:Delete %W}
bind Console <Control-d> {console:Delete %W}
bind Console <Home> {console:Home %W}
bind Console <Control-a> {console:Home %W}
bind Console <End> {console:End %W}
bind Console <Control-e> {console:End %W}
bind Console <Return> {console:Enter %W}
bind Console <KP_Enter> {console:Enter %W}
bind Console <Up> {console:Prior %W}
bind Console <Control-p> {console:Prior %W}
bind Console <Down> {console:Next %W}
bind Console <Control-n> {console:Next %W}
bind Console <Control-k> {console:EraseEOL %W}
bind Console <<Cut>> {console:Cut %W}
bind Console <<Copy>> {console:Copy %W}
bind Console <<Paste>> {console:Paste %W}
bind Console <<Clear>> {console:Clear %W}

# Insert test at the "out" mark.  The "out" mark is always
# before the input line.  New text appears on the line prior
# to the current input line.
#
proc console:Puts {w t tag} {
  set nc [string length $t]
  set endc [string index $t [expr $nc-1]]
  if {$endc=="\n"} {
    if {[$w index out]<[$w index {insert linestart}]} {
      $w insert out [string range $t 0 [expr $nc-2]] $tag
      $w mark set out {out linestart +1 lines}
    } else {
      $w insert out $t $tag
    }
  } else {
    if {[$w index out]<[$w index {insert linestart}]} {
      $w insert out $t $tag
    } else {
      $w insert out $t\n $tag
      $w mark set out {out -1 char}
    }
  }
  $w yview insert
}

# Insert a single character at the insertion cursor
#
proc console:Insert {w a} {
  $w insert insert $a
  $w yview insert
}

# Move the cursor one character to the left
#
proc console:Left {w} {
  upvar #0 $w v
  scan [$w index insert] %d.%d row col
  if {$col>$v(plength)} {
    $w mark set insert "insert -1c"
  }
}

# Erase the character to the left of the cursor
#
proc console:Backspace {w} {
  upvar #0 $w v
  scan [$w index insert] %d.%d row col
  if {$col>$v(plength)} {
    $w delete {insert -1c}
  }
}

# Erase to the end of the line
#
proc console:EraseEOL {w} {
  upvar #0 $w v
  scan [$w index insert] %d.%d row col
  if {$col>=$v(plength)} {
    $w delete insert {insert lineend}
  }
}

# Move the cursor one character to the right
#
proc console:Right {w} {
  $w mark set insert "insert +1c"
}

# Erase the character to the right of the cursor
#
proc console:Delete w {
  $w delete insert
}

# Move the cursor to the beginning of the current line
#
proc console:Home w {
  upvar #0 $w v
  scan [$w index insert] %d.%d row col
  $w mark set insert $row.$v(plength)
}

# Move the cursor to the end of the current line
#
proc console:End w {
  $w mark set insert {insert lineend}
}

# Called when "Enter" is pressed.  Do something with the line
# of text that was entered.
#
proc console:Enter w {
  upvar #0 $w v
  scan [$w index insert] %d.%d row col
  set start $row.$v(plength)
  set line [$w get $start "$start lineend"]
  if {$v(historycnt)>0} {
    set last [lindex $v(history) [expr $v(historycnt)-1]]
    if {[string compare $last $line]} {
      lappend v(history) $line
      incr v(historycnt)
    }
  } else {
    set v(history) [list $line]
    set v(historycnt) 1
  }
  set v(current) $v(historycnt)
  $w insert end \n
  $w mark set out end
  if {$v(prior)==""} {
    set cmd $line
  } else {
    set cmd $v(prior)\n$line
  }
##### Original
# if {[info complete $cmd]} {    }
#   set rc [catch {uplevel #0 $cmd} res]
##### New
  global DB 
  if {[$DB complete $cmd]} {
    set CODE {}
    set rc [catch {$DB eval $cmd RESULT $CODE}]
##### End Of Changes
    if {![winfo exists $w]} return
    if {$rc} {
      $w insert end $res\n err
    } elseif {[string length $res]>0} {
      $w insert end $res\n ok
    }
    set v(prior) {}
    $w insert end $v(prompt)
  } else {
    set v(prior) $cmd
    regsub -all {[^ ]} $v(prompt) . x
    $w insert end $x
  }
  $w mark set insert end
  $w mark set out {insert linestart}
  $w yview insert
}

# Change the line to the previous line
#
proc console:Prior w {
  upvar #0 $w v
  if {$v(current)<=0} return
  incr v(current) -1
  set line [lindex $v(history) $v(current)]
  console:SetLine $w $line
}

# Change the line to the next line
#
proc console:Next w {
  upvar #0 $w v
  if {$v(current)>=$v(historycnt)} return
  incr v(current) 1
  set line [lindex $v(history) $v(current)]
  console:SetLine $w $line
}

# Change the contents of the entry line
#
proc console:SetLine {w line} {
  upvar #0 $w v
  scan [$w index insert] %d.%d row col
  set start $row.$v(plength)
  $w delete $start end
  $w insert end $line
  $w mark set insert end
  $w yview insert
}

# Called when the mouse button is pressed at position $x,$y on
# the console widget.
#
proc console:Button1 {w x y} {
  global tkPriv
  upvar #0 $w v
  set v(mouseMoved) 0
  set v(pressX) $x
  set p [console:nearestBoundry $w $x $y]
  scan [$w index insert] %d.%d ix iy
  scan $p %d.%d px py
  if {$px==$ix} {
    $w mark set insert $p
  }
  $w mark set anchor $p
  focus $w
}

# Find the boundry between characters that is nearest
# to $x,$y
#
proc console:nearestBoundry {w x y} {
  set p [$w index @$x,$y]
  set bb [$w bbox $p]
  if {![string compare $bb ""]} {return $p}
  if {($x-[lindex $bb 0])<([lindex $bb 2]/2)} {return $p}
  $w index "$p + 1 char"
}

# This routine extends the selection to the point specified by $x,$y
#
proc console:SelectTo {w x y} {
  upvar #0 $w v
  set cur [console:nearestBoundry $w $x $y]
  if {[catch {$w index anchor}]} {
    $w mark set anchor $cur
  }
  set anchor [$w index anchor]
  if {[$w compare $cur != $anchor] || (abs($v(pressX) - $x) >= 3)} {
    if {$v(mouseMoved)==0} {
      $w tag remove sel 0.0 end
    }
    set v(mouseMoved) 1
  }
  if {[$w compare $cur < anchor]} {
    set first $cur
    set last anchor
  } else {
    set first anchor
    set last $cur
  }
  if {$v(mouseMoved)} {
    $w tag remove sel 0.0 $first
    $w tag add sel $first $last
    $w tag remove sel $last end
    update idletasks
  }
}

# Called whenever the mouse moves while button-1 is held down.
#
proc console:B1Motion {w x y} {
  upvar #0 $w v
  set v(y) $y
  set v(x) $x
  console:SelectTo $w $x $y
}

# Called whenever the mouse leaves the boundries of the widget
# while button 1 is held down.
#
proc console:B1Leave {w x y} {
  upvar #0 $w v
  set v(y) $y
  set v(x) $x
  console:motor $w
}

# This routine is called to automatically scroll the window when
# the mouse drags offscreen.
#
proc console:motor w {
  upvar #0 $w v
  if {![winfo exists $w]} return
  if {$v(y)>=[winfo height $w]} {
    $w yview scroll 1 units
  } elseif {$v(y)<0} {
    $w yview scroll -1 units
  } else {
    return
  }
  console:SelectTo $w $v(x) $v(y)
  set v(timer) [after 50 console:motor $w]
}

# This routine cancels the scrolling motor if it is active
#
proc console:cancelMotor w {
  upvar #0 $w v
  catch {after cancel $v(timer)}
  catch {unset v(timer)}
}

# Do a Copy operation on the stuff currently selected.
#
proc console:Copy w {
  if {![catch {set text [$w get sel.first sel.last]}]} {
     clipboard clear -displayof $w
     clipboard append -displayof $w $text
  }
}

# Return 1 if the selection exists and is contained
# entirely on the input line.  Return 2 if the selection
# exists but is not entirely on the input line.  Return 0
# if the selection does not exist.
#
proc console:canCut w {
  set r [catch {
    scan [$w index sel.first] %d.%d s1x s1y
    scan [$w index sel.last] %d.%d s2x s2y
    scan [$w index insert] %d.%d ix iy
  }]
  if {$r==1} {return 0}
  if {$s1x==$ix && $s2x==$ix} {return 1}
  return 2
}

# Do a Cut operation if possible.  Cuts are only allowed
# if the current selection is entirely contained on the
# current input line.
#
proc console:Cut w {
  if {[console:canCut $w]==1} {
    console:Copy $w
    $w delete sel.first sel.last
  }
}

# Do a paste opeation.
#
proc console:Paste w {
  if {[console:canCut $w]==1} {
    $w delete sel.first sel.last
  }
  if {[catch {selection get -displayof $w -selection CLIPBOARD} topaste]} {
    return
  }
  set prior 0
  foreach line [split $topaste \n] {
    if {$prior} {
      console:Enter $w
      update
    }
    set prior 1
    $w insert insert $line
  }
}

# Enable or disable entries in the Edit menu
#
proc console:EnableEditMenu w {
  upvar #0 $w.t v
  set m $v(editmenu)
  if {$m=="" || ![winfo exists $m]} return
  switch [console:canCut $w.t] {
    0 {
      $m entryconf Copy -state disabled
      $m entryconf Cut -state disabled
    }
    1 {
      $m entryconf Copy -state normal
      $m entryconf Cut -state normal
    }
    2 {
      $m entryconf Copy -state normal
      $m entryconf Cut -state disabled
    }
  }
}

# Prompt for the user to select an input file, the "source" that file.
#
proc console:SourceFile w {
  set types {
    {{TCL Scripts}  {.tcl}}
    {{All Files}    *}
  }
  set f [tk_getOpenFile -filetypes $types -title "TCL Script To Source..."]
  if {$f!=""} {
    uplevel #0 source $f
  }
}

# Prompt the user for the name of a writable file.  Then write the
# entire contents of the console screen to that file.
#
proc console:SaveFile w {
  set types {
    {{Text Files}  {.txt}}
    {{All Files}    *}
  }
  set f [tk_getSaveFile -filetypes $types -title "Write Screen To..."]
  if {$f!=""} {
    if {[catch {open $f w} fd]} {
      tk_messageBox -type ok -icon error -message $fd
    } else {
      puts $fd [string trimright [$w get 1.0 end] \n]
      close $fd
    }
  }
}

# Erase everything from the console above the insertion line.
#
proc console:Clear w {
  $w delete 1.0 {insert linestart}
}

# Start the console
#
# console:create {.@console} {% } {Tcl/Tk Console}
###############################################################################


if {[info command sqlite]==""} {
  load ./tclsqlite.so sqlite
}



proc set_title {title} {
  if {$title==""} {
    set main SQLite
  } else {
    set main "SQLite - $title"
  }
  wm title . $main
  wm iconname . SQLite
}
set_title {}

frame .mb -bd 1 -relief raised
pack .mb -side top -fill x
menubutton .mb.file -text File -underline 0 -menu .mb.file.m
pack .mb.file -side left -padx 5
set m [menu .mb.file.m]
$m add separator
$m add command -label Exit -command exit
menubutton .mb.edit -text Edit -underline 0 -menu .mb.edit.m
pack .mb.edit -side left -padx 5
#menu .mb.edit.m

frame .f
pack .f -side top -fill both -expand 1
console:create_child .f {sqlite> } .mb.edit.m

/*
** 2002 January 15
**
** 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 implements a simple standalone program used to test whether
** or not the SQLite library is threadsafe.
**
** Testing the thread safety of SQLite is difficult because there are very
** few places in the code that are even potentially unsafe, and those
** places execute for very short periods of time.  So even if the library
** is compiled with its mutexes disabled, it is likely to work correctly
** in a multi-threaded program most of the time.  
*/
#include "sqlite.h"
#include <pthread.h>
#include <sched.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

/*
** Enable for tracing
*/
static int verbose = 0;

/*
** Come here to die.
*/
static void Exit(int rc){
  exit(rc);
}

extern char *sqlite_mprintf(const char *zFormat, ...);
extern char *sqlite_vmprintf(const char *zFormat, va_list);

/*
** When a lock occurs, yield.
*/
static int db_is_locked(void *NotUsed, const char *zNotUsed, int iNotUsed){
  /* sched_yield(); */
  if( verbose ) printf("BUSY %s\n", (char*)NotUsed);
  usleep(100);
  return 1;
}

/*
** Used to accumulate query results by db_query()
*/
struct QueryResult {
  const char *zFile;  /* Filename - used for error reporting */
  int nElem;          /* Number of used entries in azElem[] */
  int nAlloc;         /* Number of slots allocated for azElem[] */
  char **azElem;      /* The result of the query */
};

/*
** The callback function for db_query
*/
static int db_query_callback(
  void *pUser,     /* Pointer to the QueryResult structure */
  int nArg,        /* Number of columns in this result row */
  char **azArg,    /* Text of data in all columns */
  char **NotUsed   /* Names of the columns */
){
  struct QueryResult *pResult = (struct QueryResult*)pUser;
  int i;
  if( pResult->nElem + nArg >= pResult->nAlloc ){
    if( pResult->nAlloc==0 ){
      pResult->nAlloc = nArg+1;
    }else{
      pResult->nAlloc = pResult->nAlloc*2 + nArg + 1;
    }
    pResult->azElem = realloc( pResult->azElem, pResult->nAlloc*sizeof(char*));
    if( pResult->azElem==0 ){
      fprintf(stdout,"%s: malloc failed\n", pResult->zFile);
      return 1;
    }
  }
  if( azArg==0 ) return 0;
  for(i=0; i<nArg; i++){
    pResult->azElem[pResult->nElem++] =
        sqlite_mprintf("%s",azArg[i] ? azArg[i] : ""); 
  }
  return 0;
}

/*
** Execute a query against the database.  NULL values are returned
** as an empty string.  The list is terminated by a single NULL pointer.
*/
char **db_query(sqlite *db, const char *zFile, const char *zFormat, ...){
  char *zSql;
  int rc;
  char *zErrMsg = 0;
  va_list ap;
  struct QueryResult sResult;
  va_start(ap, zFormat);
  zSql = sqlite_vmprintf(zFormat, ap);
  va_end(ap);
  memset(&sResult, 0, sizeof(sResult));
  sResult.zFile = zFile;
  if( verbose ) printf("QUERY %s: %s\n", zFile, zSql);
  rc = sqlite_exec(db, zSql, db_query_callback, &sResult, &zErrMsg);
  if( rc==SQLITE_SCHEMA ){
    if( zErrMsg ) free(zErrMsg);
    rc = sqlite_exec(db, zSql, db_query_callback, &sResult, &zErrMsg);
  }
  if( verbose ) printf("DONE %s %s\n", zFile, zSql);
  if( zErrMsg ){
    fprintf(stdout,"%s: query failed: %s - %s\n", zFile, zSql, zErrMsg);
    free(zErrMsg);
    free(zSql);
    Exit(1);
  }
  sqlite_freemem(zSql);
  if( sResult.azElem==0 ){
    db_query_callback(&sResult, 0, 0, 0);
  }
  sResult.azElem[sResult.nElem] = 0;
  return sResult.azElem;
}

/*
** Execute an SQL statement.
*/
void db_execute(sqlite *db, const char *zFile, const char *zFormat, ...){
  char *zSql;
  int rc;
  char *zErrMsg = 0;
  va_list ap;
  va_start(ap, zFormat);
  zSql = sqlite_vmprintf(zFormat, ap);
  va_end(ap);
  if( verbose ) printf("EXEC %s: %s\n", zFile, zSql);
  rc = sqlite_exec(db, zSql, 0, 0, &zErrMsg);
  if( rc==SQLITE_SCHEMA ){
    if( zErrMsg ) free(zErrMsg);
    rc = sqlite_exec(db, zSql, 0, 0, &zErrMsg);
  }
  if( verbose ) printf("DONE %s: %s\n", zFile, zSql);
  if( zErrMsg ){
    fprintf(stdout,"%s: command failed: %s - %s\n", zFile, zSql, zErrMsg);
    free(zErrMsg);
    sqlite_freemem(zSql);
    Exit(1);
  }
  sqlite_freemem(zSql);
}

/*
** Free the results of a db_query() call.
*/
void db_query_free(char **az){
  int i;
  for(i=0; az[i]; i++){
    sqlite_freemem(az[i]);
  }
  free(az);
}

/*
** Check results
*/
void db_check(const char *zFile, const char *zMsg, char **az, ...){
  va_list ap;
  int i;
  char *z;
  va_start(ap, az);
  for(i=0; (z = va_arg(ap, char*))!=0; i++){
    if( az[i]==0 || strcmp(az[i],z)!=0 ){
      fprintf(stdout,"%s: %s: bad result in column %d: %s\n",
        zFile, zMsg, i+1, az[i]);
      db_query_free(az);
      Exit(1);
    }
  }
  va_end(ap);
  db_query_free(az);
}

pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
pthread_cond_t sig = PTHREAD_COND_INITIALIZER;
int thread_cnt = 0;

static void *worker_bee(void *pArg){
  const char *zFilename = (char*)pArg;
  char *azErr;
  int i, cnt;
  int t = atoi(zFilename);
  char **az;
  sqlite *db;

  pthread_mutex_lock(&lock);
  thread_cnt++;
  pthread_mutex_unlock(&lock);
  printf("%s: START\n", zFilename);
  fflush(stdout);
  for(cnt=0; cnt<10; cnt++){
    db = sqlite_open(&zFilename[2], 0, &azErr);
    if( db==0 ){
      fprintf(stdout,"%s: can't open\n", zFilename);
      Exit(1);
    }
    sqlite_busy_handler(db, db_is_locked, zFilename);
    db_execute(db, zFilename, "CREATE TABLE t%d(a,b,c);", t);
    for(i=1; i<=100; i++){
      db_execute(db, zFilename, "INSERT INTO t%d VALUES(%d,%d,%d);",
         t, i, i*2, i*i);
    }
    az = db_query(db, zFilename, "SELECT count(*) FROM t%d", t);
    db_check(zFilename, "tX size", az, "100", 0);  
    az = db_query(db, zFilename, "SELECT avg(b) FROM t%d", t);
    db_check(zFilename, "tX avg", az, "101", 0);  
    db_execute(db, zFilename, "DELETE FROM t%d WHERE a>50", t);
    az = db_query(db, zFilename, "SELECT avg(b) FROM t%d", t);
    db_check(zFilename, "tX avg2", az, "51", 0);
    for(i=1; i<=50; i++){
      char z1[30], z2[30];
      az = db_query(db, zFilename, "SELECT b, c FROM t%d WHERE a=%d", t, i);
      sprintf(z1, "%d", i*2);
      sprintf(z2, "%d", i*i);
      db_check(zFilename, "readback", az, z1, z2, 0);
    }
    db_execute(db, zFilename, "DROP TABLE t%d;", t);
    sqlite_close(db);
  }
  printf("%s: END\n", zFilename);
  /* unlink(zFilename); */
  fflush(stdout);
  pthread_mutex_lock(&lock);
  thread_cnt--;
  if( thread_cnt<=0 ){
    pthread_cond_signal(&sig);
  }
  pthread_mutex_unlock(&lock);
  return 0;
}

int main(int argc, char **argv){
  char *zFile;
  int i, n;
  pthread_t id;
  if( argc>2 && strcmp(argv[1], "-v")==0 ){
    verbose = 1;
    argc--;
    argv++;
  }
  if( argc<2 || (n=atoi(argv[1]))<1 ) n = 10;
  for(i=0; i<n; i++){
    char zBuf[200];
    sprintf(zBuf, "testdb-%d", (i+1)/2);
    unlink(zBuf);
  }
  for(i=0; i<n; i++){
    zFile = sqlite_mprintf("%d.testdb-%d", i%2+1, (i+2)/2);
    unlink(zFile);
    pthread_create(&id, 0, worker_bee, (void*)zFile);
    pthread_detach(id);
  }
  pthread_mutex_lock(&lock);
  while( thread_cnt>0 ){
    pthread_cond_wait(&sig, &lock);
  }
  pthread_mutex_unlock(&lock);
  for(i=0; i<n; i++){
    char zBuf[200];
    sprintf(zBuf, "testdb-%d", (i+1)/2);
    unlink(zBuf);
  }
  return 0;
}

}


proc chng {date desc} {
  puts "<DT><B>$date</B></DT>"
  puts "<DD><P><UL>$desc</UL></P></DD>"
}














chng {2004 January 5 (2.8.9)} {
<li>Fix a 32-bit integer overflow problem that could result in corrupt
    indices in a database if large negative numbers (less than -2147483648)
    were inserted into a indexed numeric column.</li>
<li>Fix a locking problem on multi-threaded Linux implementations.</li>
<li>Always use "." instead of "," as the decimal point even if the locale