method

group

Ruby latest stable (v2_5_5) - 0 notes - Class: Thread

group() public

Returns the ThreadGroup which contains the given thread, or returns nil if thr is not a member of any group.

Thread.main.group   #=> #<ThreadGroup:0x4029d914>

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VALUE
rb_thread_group(VALUE thread)
{
    VALUE group = rb_thread_ptr(thread)->thgroup;
    return group == 0 ? Qnil : group;
}