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instance method

IO::Buffer#locked?

() -> bool

locked? → true or false

static VALUE
rb_io_buffer_locked_p(VALUE self)
{
    struct rb_io_buffer_view *buffer = get_io_buffer_view(self);

    return RBOOL(io_buffer_locked(buffer));
}

If the buffer is locked, its underlying allocation cannot be resized, freed or transferred. Locks are shared with slices and may be nested.

Locking is a lifetime mechanism used to ensure buffers don’t move while being used by a system call or other native operation.

Example

buffer.locked do
  buffer.write(io) # theoretical system call interface
end

See also #locked #not! #inspect #null? also in 4.0 · 3.4 · 3.3 · 3.2 · 3.1

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