Mercurial > cpython-lru_cache-weakref
diff Python/ceval.c @ 18237:f02605b8fdc1 legacy-trunk
PyFrameObject: rename f_stackbottom to f_stacktop, since it points to
the next free valuestack slot, not to the base (in America, stacks push
and pop at the top -- they mutate at the bottom in Australia <winK>).
eval_frame(): assert that f_stacktop isn't NULL upon entry.
frame_delloc(): avoid ordered pointer comparisons involving f_stacktop
when f_stacktop is NULL.
| author | Tim Peters <tim.peters@gmail.com> |
|---|---|
| date | Sat, 23 Jun 2001 05:26:56 +0000 |
| parents | 36e825660a24 |
| children | a1ef43a6d6e1 |
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--- a/Python/ceval.c Sat Jun 23 05:26:52 2001 +0000 +++ b/Python/ceval.c Sat Jun 23 05:26:56 2001 +0000 @@ -147,9 +147,8 @@ "generator already executing"); return NULL; } - if (f->f_stackbottom == NULL) { + if (f->f_stacktop == NULL) return NULL; - } /* Generators always return to their most recent caller, not * necessarily their creator. */ @@ -584,8 +583,9 @@ freevars = f->f_localsplus + f->f_nlocals; _PyCode_GETCODEPTR(co, &first_instr); next_instr = first_instr + f->f_lasti; - stack_pointer = f->f_stackbottom; - f->f_stackbottom = NULL; + stack_pointer = f->f_stacktop; + assert(stack_pointer != NULL); + f->f_stacktop = NULL; #ifdef LLTRACE lltrace = PyDict_GetItemString(f->f_globals,"__lltrace__") != NULL; @@ -1371,7 +1371,7 @@ case YIELD_VALUE: retval = POP(); - f->f_stackbottom = stack_pointer; + f->f_stacktop = stack_pointer; f->f_lasti = INSTR_OFFSET(); why = WHY_YIELD; break;