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82 lines
2.8 KiB
82 lines
2.8 KiB
5 years ago
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/* Frame object interface */
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#ifndef Py_FRAMEOBJECT_H
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#define Py_FRAMEOBJECT_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct {
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int b_type; /* what kind of block this is */
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int b_handler; /* where to jump to find handler */
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int b_level; /* value stack level to pop to */
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} PyTryBlock;
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typedef struct _frame {
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PyObject_VAR_HEAD
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struct _frame *f_back; /* previous frame, or NULL */
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PyCodeObject *f_code; /* code segment */
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PyObject *f_builtins; /* builtin symbol table (PyDictObject) */
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PyObject *f_globals; /* global symbol table (PyDictObject) */
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PyObject *f_locals; /* local symbol table (any mapping) */
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PyObject **f_valuestack; /* points after the last local */
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/* Next free slot in f_valuestack. Frame creation sets to f_valuestack.
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Frame evaluation usually NULLs it, but a frame that yields sets it
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to the current stack top. */
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PyObject **f_stacktop;
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PyObject *f_trace; /* Trace function */
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/* If an exception is raised in this frame, the next three are used to
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* record the exception info (if any) originally in the thread state. See
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* comments before set_exc_info() -- it's not obvious.
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* Invariant: if _type is NULL, then so are _value and _traceback.
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* Desired invariant: all three are NULL, or all three are non-NULL. That
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* one isn't currently true, but "should be".
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*/
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PyObject *f_exc_type, *f_exc_value, *f_exc_traceback;
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PyThreadState *f_tstate;
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int f_lasti; /* Last instruction if called */
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/* As of 2.3 f_lineno is only valid when tracing is active (i.e. when
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f_trace is set) -- at other times use PyCode_Addr2Line instead. */
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int f_lineno; /* Current line number */
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int f_iblock; /* index in f_blockstack */
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PyTryBlock f_blockstack[CO_MAXBLOCKS]; /* for try and loop blocks */
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PyObject *f_localsplus[1]; /* locals+stack, dynamically sized */
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} PyFrameObject;
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/* Standard object interface */
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PyAPI_DATA(PyTypeObject) PyFrame_Type;
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#define PyFrame_Check(op) ((op)->ob_type == &PyFrame_Type)
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#define PyFrame_IsRestricted(f) \
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((f)->f_builtins != (f)->f_tstate->interp->builtins)
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PyAPI_FUNC(PyFrameObject *) PyFrame_New(PyThreadState *, PyCodeObject *,
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PyObject *, PyObject *);
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/* The rest of the interface is specific for frame objects */
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/* Block management functions */
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PyAPI_FUNC(void) PyFrame_BlockSetup(PyFrameObject *, int, int, int);
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PyAPI_FUNC(PyTryBlock *) PyFrame_BlockPop(PyFrameObject *);
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/* Extend the value stack */
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PyAPI_FUNC(PyObject **) PyFrame_ExtendStack(PyFrameObject *, int, int);
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/* Conversions between "fast locals" and locals in dictionary */
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PyAPI_FUNC(void) PyFrame_LocalsToFast(PyFrameObject *, int);
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PyAPI_FUNC(void) PyFrame_FastToLocals(PyFrameObject *);
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#ifdef __cplusplus
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}
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#endif
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#endif /* !Py_FRAMEOBJECT_H */
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