Re: Lock code block without explicit lock variable ?

[Araq]

This works, check your basic program logic, it's wrong.
    
    
    import locks, threadpool
    
    var lock: Lock  # declare to globals
    initLock(lock)
    
    template lockBlock(code: untyped): untyped =
      # copy withLock implementation
      acquire(lock)
      try:
        {.locks: [lock].}:
          code
      finally:
        release(lock)
    
    var val = 0
    proc run() =
      lockBlock:
        var n = val
        for i in ..10000:
          n += 1 - 2*(i mod 2) # what is doing here does not mater
        val = n
    
    for i in 1..8: spawn run()
    sync()
    
    echo val  # correct output should be 8
    
    
    Run