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instance method

Thread#thread_variable?

(::interned key) -> bool

thr.thread_variable?(key) → true or false

static VALUE
rb_thread_variable_p(VALUE thread, VALUE key)
{
    VALUE locals;
    VALUE symbol = rb_to_symbol(key);

    if (LIKELY(!THREAD_LOCAL_STORAGE_INITIALISED_P(thread))) {
        return Qfalse;
    }
    locals = rb_thread_local_storage(thread);

    return RBOOL(rb_hash_lookup(locals, symbol) != Qnil);
}

Returns true if the given string (or symbol) exists as a thread-local variable.

Example

me = Thread.current
me.thread_variable_set(:oliver, "a")
me.thread_variable?(:oliver)    #=> true
me.thread_variable?(:stanley)   #=> false

Note that these are not fiber local variables. Please see Thread#[] and Thread#thread_variable_get for more details.

See also #terminate #thread_variable_get #stop? #thread_variables also in 4.0 · 3.4 · 3.3 · 3.2 · 3.1 · 3.0

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