for(pIter=pLock->pList; pIter; pIter=pIter->pNext){
      assert(pIter->eAsyncLock>=pIter->eLock);
      if( pIter->eAsyncLock>eRequired ){
        eRequired = pIter->eAsyncLock;
        assert(eRequired>=0 && eRequired<=SQLITE_LOCK_EXCLUSIVE);
      }
    }

    if( eRequired>pLock->eLock ){
      rc = sqlite3OsLock(pLock->pFile, eRequired);

    }else if(eRequired<pLock->eLock){
      rc = sqlite3OsUnlock(pLock->pFile, eRequired);
    }



    if( rc==SQLITE_OK ){
      pLock->eLock = eRequired;

    }
  }

  return rc;
}

/*
................................................................................
        iIn++;
        continue;
      }

      /* Replace any occurences of "<path-component>/../" with "" */
      if( iOut>0 && iIn<=(nPathOut-4) 
       && zPathOut[iIn]=='/' && zPathOut[iIn+1]=='.' 
       && zPathOut[iIn+2]=='.' && zPathOut[iIn+2]=='/'
      ){
        iIn += 3;
        iOut--;
        for( ; iOut>0 && zPathOut[iOut]!='/'; iOut--);
        continue;
      }

      zPathOut[iOut++] = zPathOut[iIn];
    }
    zPathOut[iOut] = '\0';
  }

    for(pIter=pLock->pList; pIter; pIter=pIter->pNext){
      assert(pIter->eAsyncLock>=pIter->eLock);
      if( pIter->eAsyncLock>eRequired ){
        eRequired = pIter->eAsyncLock;
        assert(eRequired>=0 && eRequired<=SQLITE_LOCK_EXCLUSIVE);
      }
    }

    if( eRequired>pLock->eLock ){
      rc = sqlite3OsLock(pLock->pFile, eRequired);
      if( rc==SQLITE_OK ){
        pLock->eLock = eRequired;

      }
    }
    else if( eRequired<pLock->eLock && eRequired<=SQLITE_LOCK_SHARED ){
      rc = sqlite3OsUnlock(pLock->pFile, eRequired);
      if( rc==SQLITE_OK ){
        pLock->eLock = eRequired;
      }
    }
  }

  return rc;
}

/*
................................................................................
        iIn++;
        continue;
      }

      /* Replace any occurences of "<path-component>/../" with "" */
      if( iOut>0 && iIn<=(nPathOut-4) 
       && zPathOut[iIn]=='/' && zPathOut[iIn+1]=='.' 
       && zPathOut[iIn+2]=='.' && zPathOut[iIn+3]=='/'
      ){
        iIn += 3;
        iOut--;
        for( ; iOut>0 && zPathOut[iOut-1]!='/'; iOut--);
        continue;
      }

      zPathOut[iOut++] = zPathOut[iIn];
    }
    zPathOut[iOut] = '\0';
  }

# 2007 September 5
#
# 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.
#
#***********************************************************************
#
# The focus of this file is testing the code in test_async.c.
# Specifically, it tests that the xFullPathname() method of
# of the asynchronous vfs works correctly.
#
# $Id: async3.test,v 1.1 2007/09/05 14:32:25 danielk1977 Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl

if { [info commands sqlite3async_enable]==""  } {
  # The async logic is not built into this system
  puts "Skipping async3 tests: not compiled with required features"
  finish_test
  return
}

db close
sqlite3async_enable 1
sqlite3async_start

set paths {
  chocolate/banana/vanilla/file.db
  chocolate//banana/vanilla/file.db
  chocolate/./banana//vanilla/file.db
  chocolate/banana/./vanilla/file.db
  chocolate/banana/../banana/vanilla/file.db
  chocolate/banana/./vanilla/extra_bit/../file.db
}

do_test async3-1.0 {
  file mkdir [file join chocolate banana vanilla]
  file delete -force chocolate/banana/vanilla/file.db
  file delete -force chocolate/banana/vanilla/file.db-journal
} {}
do_test async3-1.1 {
  sqlite3 db chocolate/banana/vanilla/file.db
  execsql {
    CREATE TABLE abc(a, b, c);
    BEGIN;
    INSERT INTO abc VALUES(1, 2, 3);
  }
} {}

set N 2
foreach p $paths {
  sqlite3 db2 $p
  do_test async3-1.$N.1 {
    execsql {SELECT * FROM abc} db2
  } {}
  do_test async3-1.$N.2 {
    catchsql {INSERT INTO abc VALUES(4, 5, 6)} db2
  } {1 {database is locked}}
  db2 close
  incr N
}

db close
sqlite3async_halt idle
sqlite3async_wait
sqlite3async_enable 0
finish_test