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bpo-33608: Simplify ceval's DISPATCH by hoisting eval_breaker ahead of time. (gh-12062)

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This includes fixes to various _Py_atomic_* macros.
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Eric Snow 2019-03-01 13:15:45 -07:00 • committed by GitHub
parent b05b711a2c
commit bda918bf65
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2 changed files with 27 additions and 26 deletions
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5
Python/ceval.c
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@ -637,6 +637,7 @@ _PyEval_EvalFrameDefault(PyFrameObject *f, int throwflag)
PyObject **fastlocals, **freevars;
PyObject *retval = NULL; /* Return value */
PyThreadState *tstate = _PyThreadState_GET();
_Py_atomic_int *eval_breaker = &tstate->interp->ceval.eval_breaker;
PyCodeObject *co;
/* when tracing we set things up so that
@ -722,7 +723,7 @@ _PyEval_EvalFrameDefault(PyFrameObject *f, int throwflag)
#define DISPATCH() \
{ \
if (!_Py_atomic_load_relaxed(&tstate->interp->ceval.eval_breaker)) { \
if (!_Py_atomic_load_relaxed(eval_breaker)) { \
FAST_DISPATCH(); \
} \
continue; \
@ -1024,7 +1025,7 @@ main_loop:
async I/O handler); see Py_AddPendingCall() and
Py_MakePendingCalls() above. */
if (_Py_atomic_load_relaxed(&(tstate->interp->ceval.eval_breaker))) {
if (_Py_atomic_load_relaxed(eval_breaker)) {
opcode = _Py_OPCODE(*next_instr);
if (opcode == SETUP_FINALLY ||
opcode == SETUP_WITH ||