diff options
Diffstat (limited to 'Python/ceval_gil.h')
-rw-r--r-- | Python/ceval_gil.h | 45 |
1 files changed, 23 insertions, 22 deletions
diff --git a/Python/ceval_gil.h b/Python/ceval_gil.h index da2a1d6..b4cb599 100644 --- a/Python/ceval_gil.h +++ b/Python/ceval_gil.h @@ -196,8 +196,7 @@ tstate_must_exit(PyThreadState *tstate) tstate->interp->runtime to support calls from Python daemon threads. After Py_Finalize() has been called, tstate can be a dangling pointer: point to PyThreadState freed memory. */ - _PyRuntimeState *runtime = &_PyRuntime; - PyThreadState *finalizing = _PyRuntimeState_GetFinalizing(runtime); + PyThreadState *finalizing = _PyRuntimeState_GetFinalizing(&_PyRuntime); return (finalizing != NULL && finalizing != tstate); } @@ -243,20 +242,23 @@ take_gil(PyThreadState *tstate) } while (_Py_atomic_load_relaxed(&gil->locked)) { - int timed_out = 0; - unsigned long saved_switchnum; - - saved_switchnum = gil->switch_number; - + unsigned long saved_switchnum = gil->switch_number; unsigned long interval = (gil->interval >= 1 ? gil->interval : 1); + int timed_out = 0; COND_TIMED_WAIT(gil->cond, gil->mutex, interval, timed_out); + /* If we timed out and no switch occurred in the meantime, it is time to ask the GIL-holding thread to drop it. */ if (timed_out && _Py_atomic_load_relaxed(&gil->locked) && gil->switch_number == saved_switchnum) { + if (tstate_must_exit(tstate)) { + MUTEX_UNLOCK(gil->mutex); + PyThread_exit_thread(); + } + SET_GIL_DROP_REQUEST(ceval); } } @@ -281,6 +283,19 @@ _ready: MUTEX_UNLOCK(gil->switch_mutex); #endif + if (tstate_must_exit(tstate)) { + /* bpo-36475: If Py_Finalize() has been called and tstate is not + the thread which called Py_Finalize(), exit immediately the + thread. + + This code path can be reached by a daemon thread which was waiting + in take_gil() while the main thread called + wait_for_thread_shutdown() from Py_Finalize(). */ + MUTEX_UNLOCK(gil->mutex); + drop_gil(ceval, ceval2, tstate); + PyThread_exit_thread(); + } + if (_Py_atomic_load_relaxed(&ceval->gil_drop_request)) { RESET_GIL_DROP_REQUEST(ceval, ceval2); } @@ -293,27 +308,13 @@ _ready: COMPUTE_EVAL_BREAKER(ceval, ceval2); } - int must_exit = tstate_must_exit(tstate); - /* Don't access tstate if the thread must exit */ - if (!must_exit && tstate->async_exc != NULL) { + if (tstate->async_exc != NULL) { _PyEval_SignalAsyncExc(tstate); } MUTEX_UNLOCK(gil->mutex); - if (must_exit) { - /* bpo-36475: If Py_Finalize() has been called and tstate is not - the thread which called Py_Finalize(), exit immediately the - thread. - - This code path can be reached by a daemon thread which was waiting - in take_gil() while the main thread called - wait_for_thread_shutdown() from Py_Finalize(). */ - drop_gil(ceval, ceval2, tstate); - PyThread_exit_thread(); - } - errno = err; } |