Граф коммитов

440 Коммитов

Автор SHA1 Сообщение Дата
kosaki 863e087326 * thread.c (rb_thread_terminate_all): suppress a warning.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37885 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-11-27 02:00:29 +00:00
kosaki b1a18cf49b * thread.c (thread_join): raises ThreadError if target therad
is a main thread.
* test/ruby/test_thread.rb (test_thread_join_main_thread):
  test for the above.
* NEWS: news for the above.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37884 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-11-27 02:00:19 +00:00
kosaki 8079f8a6f2 * thread.c (thread_join): raises ThreadError if target thread
is a current thread.
* test/ruby/test_thread.rb (test_thread_join_current):
  test for the above.
* NEWS: news for the above.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37883 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-11-27 02:00:09 +00:00
kosaki a916278900 * thread.c (rb_thread_terminate_all): broadcast eTerminateSignal
again when Ctrl-C was pressed. [Feature #1952] [ruby-dev:39107]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37875 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-11-26 23:08:36 +00:00
kosaki 253938067a * thread.c (rb_thread_terminate_all): add RUBY_VM_CHECK_INTS_BLOCKING().
Otherwise the loop in this function behave as busy loop because
  native_sleep() return immediately when RUBY_VM_INTERRUPTED() is true.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37873 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-11-26 22:49:36 +00:00
kosaki 5b238e8dc7 * thread.c (rb_mutex_trylock, rb_mutex_unlock, mutex_sleep):
raises ThreadError if called from trap handler as Thread#join.
* NEWS: news fot the above.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37867 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-11-26 15:17:01 +00:00
kosaki 39d38ff82f * thread.c (rb_thread_terminate_all): use native_sleep() instead
of rb_thread_schedule(). Otherwise, it consume 100% cpu meaninglessly.
  [Bug #5368] [ruby-dev:44546]
* thread.c (thread_start_func_2): last sub-thread wakes up main thread.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37865 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-11-26 13:47:23 +00:00
kosaki 66e2e6ee69 * vm_core.h (RUBY_VM_SET_TIMER_INTERRUPT, RUBY_VM_SET_INTERRUPT)
(RUBY_VM_SET_FINALIZER_INTERRUPT, RUBY_VM_SET_TRAP_INTERRUPT)
(RUBY_VM_INTERRUPTED): use enum symbol instead of immediate value.
* thread.c (thread_join_m, rb_threadptr_execute_interrupts): ditto.
* signal.c (signal_exec): ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37864 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-11-26 12:17:10 +00:00
kosaki 58543f00b6 * thread.c (thread_join_m): use th->interrupt_mask instead of
th->in_trap.

* vm_core.h (struct rb_thread_struct): remove in_trap member.
* signal.c (signal_exec): ditto.
* thread.c (thread_create_core): ditto.
* thread.c (Init_Thread): ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37863 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-11-26 11:45:39 +00:00
kosaki 6190bb4d8a * ruby_atomic.h (ATOMIC_CAS): new macro for compare-and-exchange.
* vm_core.h (struct rb_thread_struct): add interrupt_mask member.
* thread.c (thread_create_core, Init_Thread): initialize
  th->thread_mask.

* vm_core.h (RUBY_VM_INTERRUPTED_ANY): new macro for avoiding
  bare th->interrupt_flag.
* vm_core.h (RUBY_VM_INTERRUPTED, RUBY_VM_INTERRUPTED): check
  th->interrupt_mask.
* thread.c (set_unblock_function, rb_thread_schedule): replace
  th->interrupt_flag with RUBY_VM_INTERRUPTED_ANY()

* signal.c (signal_exec): set up thread->interrupt_mask for
  preventing recursive trap handler.
* vm_core.h (RUBY_VM_CHECK_INTS, RUBY_VM_CHECK_INTS_BLOCKING): ditto.

* thread.c (rb_threadptr_execute_interrupts):
  don't process interrupt if it is masked.
  [Bug #6009] [ruby-core:42524]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37861 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-11-26 10:57:39 +00:00
kosaki 7087153156 split trap interrupt and async interrupt
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37855 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-11-26 09:22:01 +00:00
kosaki f150ed1532 * vm_core.h (rb_thread_struct): added 'in_trap' member for marking
running trap handler.
* signal.c (signal_exec): turn on in_trap when running trap.
* thread.c (Init_Thread, thread_create_core): initialize in_trap
  when creating new threads.
* thread.c (thread_join_m): raise ThreadError when running trap
  handler.Bug [#6416][ruby-core:44956]
* test/ruby/test_thread.rb (test_thread_join_in_trap): new test
  for the above.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37852 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-11-26 08:05:49 +00:00
kosaki 82b33551a4 * thread.c (thread_create_core): don't use th->thread_id before
initialized.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37824 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-11-24 02:00:10 +00:00
ko1 553931962a * vm_trace.c: add two methods:
(1) TracePoint#return_value which returns return
  value on the :return and :c_return event.
  (2) TracePoint#raised_exception which returns raised exception
  value on the :raise event.
  Eeach methods raise RuntimeError if it is called at unsupported
  event.
  Please review and give us feedback until next preview
  release (Dec/2012) of Ruby 2.0.0.
* insns.def, vm.c, vm_eval.c, vm_insnhelper.c, eval.c, thread.c:
  ditto.
* vm_trace.c, vm_core.h: move definition of rb_trace_arg_t from
  vm_trace.c to vm_core.h.
  Caller fills rb_trace_arg_t and pass the pointer of this variable.
* test/ruby/test_settracefunc.rb: fix tests to test this change.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37752 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-11-20 09:48:24 +00:00
kosaki b74e1b21db revert r37730
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37740 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-11-20 01:21:19 +00:00
kosaki 57ee812851 * thread.c (rb_thread_s_check_interrupt): removed redundant
GET_THREAD().



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37732 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-11-19 11:15:07 +00:00
kosaki 4b25e0ceca * thread.c (rb_threadptr_async_errinfo_active_p): added a small
comment.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37731 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-11-19 11:13:40 +00:00
kosaki 212150c2e1 * thread.c, vm_core.h: big rename th to cur_th when works only
th is current thread.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37730 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-11-19 11:10:24 +00:00
kosaki 0a2da327f4 * thread.c (rb_thread_blocking_region_end): replaced GET_THREAD()
with ruby_thread_from_native(). We don't have GVL here.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37729 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-11-19 11:07:53 +00:00
kosaki 7643e4604b * thread.c (rb_threadptr_execute_interrupts) removed.
* thread.c (rb_threadptr_execute_interrupts_common) renamed to
  rb_threadptr_execute_interrupts. I.e. unified
  rb_threadptr_execute_interrupts and rb_threadptr_execute_interrupts_common.
* thread.c (rb_thread_schedule, rb_thread_execute_interrupts) s/_common//.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37728 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-11-19 11:04:39 +00:00
kosaki 6c56dae4b2 * prelude.rb: Moved Mutex#synchronize to
* thread.c (rb_mutex_synchronize_m): here. [Bug #4266]



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37724 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-11-19 10:22:53 +00:00
ko1 15d940b8b0 * thread.c: add `Thread#backtrace_locations' method.
This method is similart to `caller_locations' method for
  specific method.
  And fix to accept `level' and `n' parameters for `Thread#backtrace'
  and `Thread#backtrace_locations'.
  `caller' (and `caller_locations') do not return `caller' method
  frame.
  However, `Thread#backtrace' (and `Thread#backtrace_locations')
  return `Thread#backtrace' method frame itself
  if `Thread.current.backtrace' was called.
* vm_backtrace.c: ditto.
* internal.h: ditto.
* test/ruby/test_backtrace.rb: add tests.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37716 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-11-19 06:07:06 +00:00
ko1 9ee34b15e4 * thread.c (rb_thread_call_without_gvl2): change the parameter of
`func' from `int *skip_interrupt' to `VALUE *flags'.
  If (flags & RUBY_CALL_WO_GVL_FLAG_SKIP_CHECK_INTS) is not zero,
  then skip checking interrupt.
  [ruby-core:46547]
* include/ruby/thread.h: ditto.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37681 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-11-16 10:34:54 +00:00
naruse 71dcc25fb7 suppress warning: 'val' may be used uninitialized in this function
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37415 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-11-01 19:48:34 +00:00
drbrain 7ae466f134 * thread.c (rb_thread_call_without_gvl2): Note that ubf() may or may
not be called with the GVL.  Hinted that rb_thread_call_with_gvl()
  can be used to access ruby functionality.  [ruby-trunk - #6433]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37394 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-10-31 00:29:27 +00:00
drbrain 5562411c7f * thread.c (rb_thread_call_without_gvl2): Update documentation to
natural English.
* thread.c (rb_thread_call_with_gvl):  ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37393 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-10-31 00:07:17 +00:00
tenderlove 2285319b31 * thread.c: added Thread#thread_variable_(get|set),
Thread#thread_variable?, and Thread#thread_variables for operating
  on variables that are local to threads. [ruby-core:47790]

* vm.c: ditto

* test/ruby/test_thread.rb: tests for thread variables.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37384 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-10-29 17:22:36 +00:00
ko1 479d8ce5b5 * thread.c (thread_raise_m): check interrupts after Thread#raise
if a target thread is the current thread because the behavior
  of Thread.current.raise is expected to perform same as
  Kernel.raise (by rubyspec).



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37299 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-10-23 13:37:45 +00:00
ko1 a4f79a6ece Revert the last commit because some tests (in btest) fail
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37295 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-10-23 04:52:20 +00:00
ko1 d41ec2a79a * thread.c (rb_threadptr_raise): check interrupts after
Thread#raise because the behavior of Thread.current.raise is
  expected to perform same as Kernel.raise (by rubyspec).



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37294 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-10-23 04:33:04 +00:00
ko1 8addee9649 * thread.c (rb_threadptr_interrupt_mask): fix to check interrupt
after interrupt_mask changed.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37234 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-10-16 23:03:54 +00:00
zzak 61d460e5e1 * thread.c (rb_thread_aref):
Grammar in Thread documentation.
  Patch by Steve Klabnik [ruby-dev:47799] [Bug #7099]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37112 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-10-06 19:51:40 +00:00
nobu f228a4b209 thread.c: static
* thread.c (patrol_thread): should be static.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36947 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-09-10 08:21:02 +00:00
kosaki 10c14095de * thread.c (rb_mutex_lock): stop multiple threads use
pthread_cond_timedwait() concurrently. [Bug #6278] [ruby-core:44275]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36926 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-09-09 06:27:02 +00:00
nobu ceece4650a vm_insnhelper.c: iclass as klass in cfp
* vm_insnhelper.c (vm_call_method): follow iclasses as klass in cfp
  but not included modules.  [ruby-core:47241] [Bug #6891]
* vm_insnhelper.c (vm_call_bmethod): pass defined_class to follow
  proper ancestors.  [ruby-core:47241] [Bug #6891]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36736 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-08-20 11:36:34 +00:00
ko1 4a4a702e61 * vm_trace.c, vm_core.h: simplify tracing mechanism.
(1) add rb_hook_list_t data structure which includes
  hooks, events (flag) and `need_clean' flag.
  If the last flag is true, then clean the hooks list.
  In other words, deleted hooks are contained by `hooks'.
  Cleanup process should run before traversing the list.
  (2) Change check mechanism
  See EXEC_EVENT_HOOK() in vm_core.h.
  (3) Add `raw' hooks APIs
  Normal hooks are guarded from exception by rb_protect().
  However, this protection is overhead for too simple
  functions which never cause exceptions.  `raw' hooks
  are executed without protection and faster.
  Now, we only provide registration APIs.  All `raw'
  hooks are kicked under protection (same as normal hooks).
* include/ruby/ruby.h: remove internal data definition and
  macros.
* internal.h (ruby_suppress_tracing), vm_trace.c: rename
  ruby_suppress_tracing() to rb_suppress_tracing()
  and remove unused function parameter.
* parse.y: fix to use renamed rb_suppress_tracing().
* thread.c (thread_create_core): no need to set RUBY_VM_VM.
* vm.c (mark_event_hooks): move definition to vm_trace.c.
* vm.c (ruby_vm_event_flags): add a global variable.
  This global variable represents all of Threads and VM's
  event masks (T1#events | T2#events | ... | VM#events).
  You can check the possibility kick trace func or not
  with ruby_vm_event_flags.
  ruby_vm_event_flags is maintained by vm_trace.c.
* cont.c (fiber_switch, rb_cont_call): restore tracing status.
  [Feature #4347]
* test/ruby/test_continuation.rb: ditto.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36715 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-08-16 11:41:24 +00:00
ko1 8eb93103e4 * vm_trace.c: separate trace_func related functions from
thread.c.
* thread.c: ditto.
* common.mk: add vm_trace.o.
* inits.c: call Init_vm_trace().



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36703 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-08-15 04:39:10 +00:00
nagachika 9cdf55485a * thread.c (thread_create_core): hide th->async_errinfo_mask_stack from
ObjectSpace.each_object. refix of r36539.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36570 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-07-29 16:00:36 +00:00
ktsj afde2e8d05 * thread.c (Init_Thread): does not need to set klass
explicitly.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36565 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-07-29 05:28:04 +00:00
nagachika ea637ebaa4 * thread.c (thread_create_core, Init_Thread): hide
th->async_errinfo_queue and th->async_errinfo_mask_stack from
  ObjectSpace.each_object.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36539 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-07-25 16:40:04 +00:00
naruse ee755e2ce9 * thread.c (rb_threadptr_execute_interrupts_common): increase
running_time_us on THREAD_TO_KILL like on THREAD_RUNNABLE.
  This cause not to siwtch from a thread which is to be killed
  on FreeBSD and Mac OS X. see also the test.
  This issue maybe exist for long time but happens after r36430.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36492 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-07-22 15:04:11 +00:00
ko1 f4a8db647a * thread.c (rb_thread_s_control_interrupt,
rb_thread_s_check_interrupt): added for
  Thread.control_intgerrupt and Thread.check_interrupt.
  See details on rdoc.
  I'll make an ticket for this feature.
* test/ruby/test_thread.rb: add a test for Thread.control_intgerrupt.
* thread.c (rb_threadptr_raise): make a new exception object
  even if argc is 0.
* thread.c (rb_thread_kill): kill thread immediately if target thread
  is current thread.
* vm_core.h (RUBY_VM_CHECK_INTS_BLOCKING): added.
  CHECK_INTS while/after blocking operation.
* vm_core.h (RUBY_VM_CHECK_INTS): require rb_thread_t ptr.
* cont.c (fiber_switch): use replaced RUBY_VM_CHECK_INTS().
* eval.c (ruby_cleanup): ditto.
* insns.def: ditto.
* process.c (rb_waitpid): ditto.
* vm_eval.c (vm_call0): ditto.
* vm_insnhelper.c (vm_call_method): ditto.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36470 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-07-19 14:19:40 +00:00
nobu 5e7fa03bc0 thread.c: remove deprecated
* thread.c (rb_gc_mark_threads): remove deprecated function.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36461 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-07-19 05:15:51 +00:00
ko1 e9a91d2c95 * thread.c (rb_thread_call_without_gvl2): added.
it can skip last CHECK_INTS.  See document for more details.
  Document about it was updated a bit.
* include/ruby/thread.h (decl. of rb_thread_call_without_gvl2): added.
* thread.c (rb_thread_call_with_gvl): remove "EXPERIMENTAL!"
  warning from a document.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36433 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-07-18 06:47:43 +00:00
ko1 eff4b2b2e1 * thread.c: fix last commit miss.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36431 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-07-18 05:47:48 +00:00
ko1 28144433b2 * thread.c (rb_threadptr_async_errinfo_*): manage async errors queue.
Async events such as an exception throwed by Thread#raise,
  Thread#kill and thread termination (after main thread termination)
  will be queued to th->async_errinfo_queue.
  - clear: clear the queue.
  - enque: enque err object into queue.
  - deque: deque err object from queue.
  - active_p: return 1 if the queue should be checked.
  rb_thread_t#thrown_errinfo was removed.
* vm_core.h: add declarations of rb_threadptr_async_errinfo_*.
  remove rb_thread_t#thrown_errinfo field and
  add rb_thread_t#async_errinfo_queue (queue body: Array),
  rb_thread_t#async_errinfo_queue_checked (flag),
  rb_thread_t#async_errinfo_mask_stack(Array, not used yet).
* vm.c (rb_thread_mark): fix a mark function.
* cont.c (rb_fiber_start): enque an error.
* process.c (after_fork): clear async errinfo queue.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36430 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-07-18 05:46:40 +00:00
nobu c51a826764 rb_thread_call_without_gvl
* include/ruby/thread.h: new header file for thread stuff.
* thread.c (rb_thread_call_without_gvl): export.  [Feature#4328]
  returns void* instead of VALUE.  [Feature #5543]
* thread.c (rb_thread_blocking_region): deprecate.  [ruby-core:46295]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36355 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-07-10 13:57:11 +00:00
nobu 8a995a56c7 thread.c: unsigned
* thread.c (rb_thread_shield_waiting_{inc,dec}): should be unsigned.
  int is large enough since ruby requires it to be 32bit at least.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36331 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-07-06 03:46:39 +00:00
nobu a2d0ee620f ThreadShield: check waiting count
* thread.c (rb_thread_shield_waiting_{inc,dec}): check waiting count.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36329 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-07-06 03:24:41 +00:00
nobu 0f020f7ca4 * thread.c: fix typo.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36323 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2012-07-05 14:10:48 +00:00