LOCK | = | Mutex.new |
Returns true
if the given string (or symbol) exists as a
thread-local variable.
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_variable_get for more details.
Returns the value of a thread local variable that has been set. Note that these are different than fiber local values.
Thread local values are carried along with threads, and do not respect fibers. For example:
Thread.new { Thread.current.thread_variable_set("foo", "bar") # set a thread local Thread.current["foo"] = "bar" # set a fiber local Fiber.new { Fiber.yield [ Thread.current.thread_variable_get("foo"), # get the thread local Thread.current["foo"], # get the fiber local ] }.resume }.join.value # => ['bar', nil]
The value "bar"
is returned for the thread local,
where nil
is returned for the fiber local. The fiber is
executed in the same thread, so the thread local values are available.
Sets a thread local with key
to value
. Note that
these are local to threads, and not to fibers. Please see #thread_variable_get
for more information.
Returns an an array of the names of the thread-local variables (as Symbols).
thr = Thread.new do Thread.current.thread_variable_set(:cat, 'meow') Thread.current.thread_variable_set("dog", 'woof') end thr.join #=> #<Thread:0x401b3f10 dead> thr.thread_variables #=> [:dog, :cat]
Note that these are not fiber local variables. Please see #thread_variable_get for more details.