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Remove f_closure slot of frameobject and use f_localsplus instead.

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This change eliminates an extra malloc/free when a frame with free
variables is created.  Any cell vars or free vars are stored in
f_localsplus after the locals and before the stack.

eval_code2() fills in the appropriate values after handling
initialization of locals.

To track the size the frame has an f_size member that tracks the total
size of f_localsplus. It used to be implicitly f_nlocals + f_stacksize.
This commit is contained in:
Jeremy Hylton 2001-01-29 22:51:52 +00:00
parent 55087f0c35
commit 2b724da8d9
3 changed files with 33 additions and 28 deletions
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4
Include/frameobject.h
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@ -20,7 +20,6 @@ typedef struct _frame {
PyObject *f_builtins; /* builtin symbol table (PyDictObject) */
PyObject *f_globals; /* global symbol table (PyDictObject) */
PyObject *f_locals; /* local symbol table (PyDictObject) */
PyObject *f_closure; /* environment for free variables */
PyObject **f_valuestack; /* points after the last local */
PyObject *f_trace; /* Trace function */
PyObject *f_exc_type, *f_exc_value, *f_exc_traceback;
@ -31,7 +30,10 @@ typedef struct _frame {
in this scope */
int f_iblock; /* index in f_blockstack */
PyTryBlock f_blockstack[CO_MAXBLOCKS]; /* for try and loop blocks */
int f_size; /* size of localsplus */
int f_nlocals; /* number of locals */
int f_ncells;
int f_nfreevars;
int f_stacksize; /* size of value stack */
PyObject *f_localsplus[1]; /* locals+stack, dynamically sized */
} PyFrameObject;