1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889 |
- /* Frame object interface */
- #ifndef Py_FRAMEOBJECT_H
- #define Py_FRAMEOBJECT_H
- #ifdef __cplusplus
- extern "C" {
- #endif
- typedef struct {
- int b_type; /* what kind of block this is */
- int b_handler; /* where to jump to find handler */
- int b_level; /* value stack level to pop to */
- } PyTryBlock;
- typedef struct _frame {
- PyObject_VAR_HEAD
- struct _frame *f_back; /* previous frame, or NULL */
- PyCodeObject *f_code; /* code segment */
- PyObject *f_builtins; /* builtin symbol table (PyDictObject) */
- PyObject *f_globals; /* global symbol table (PyDictObject) */
- PyObject *f_locals; /* local symbol table (any mapping) */
- PyObject **f_valuestack; /* points after the last local */
- /* Next free slot in f_valuestack. Frame creation sets to f_valuestack.
- Frame evaluation usually NULLs it, but a frame that yields sets it
- to the current stack top. */
- PyObject **f_stacktop;
- PyObject *f_trace; /* Trace function */
- /* If an exception is raised in this frame, the next three are used to
- * record the exception info (if any) originally in the thread state. See
- * comments before set_exc_info() -- it's not obvious.
- * Invariant: if _type is NULL, then so are _value and _traceback.
- * Desired invariant: all three are NULL, or all three are non-NULL. That
- * one isn't currently true, but "should be".
- */
- PyObject *f_exc_type, *f_exc_value, *f_exc_traceback;
- PyThreadState *f_tstate;
- int f_lasti; /* Last instruction if called */
- /* Call PyFrame_GetLineNumber() instead of reading this field
- directly. As of 2.3 f_lineno is only valid when tracing is
- active (i.e. when f_trace is set). At other times we use
- PyCode_Addr2Line to calculate the line from the current
- bytecode index. */
- int f_lineno; /* Current line number */
- int f_iblock; /* index in f_blockstack */
- PyTryBlock f_blockstack[CO_MAXBLOCKS]; /* for try and loop blocks */
- PyObject *f_localsplus[1]; /* locals+stack, dynamically sized */
- } PyFrameObject;
- /* Standard object interface */
- PyAPI_DATA(PyTypeObject) PyFrame_Type;
- #define PyFrame_Check(op) ((op)->ob_type == &PyFrame_Type)
- #define PyFrame_IsRestricted(f) \
- ((f)->f_builtins != (f)->f_tstate->interp->builtins)
- PyAPI_FUNC(PyFrameObject *) PyFrame_New(PyThreadState *, PyCodeObject *,
- PyObject *, PyObject *);
- /* The rest of the interface is specific for frame objects */
- /* Block management functions */
- PyAPI_FUNC(void) PyFrame_BlockSetup(PyFrameObject *, int, int, int);
- PyAPI_FUNC(PyTryBlock *) PyFrame_BlockPop(PyFrameObject *);
- /* Extend the value stack */
- PyAPI_FUNC(PyObject **) PyFrame_ExtendStack(PyFrameObject *, int, int);
- /* Conversions between "fast locals" and locals in dictionary */
- PyAPI_FUNC(void) PyFrame_LocalsToFast(PyFrameObject *, int);
- PyAPI_FUNC(void) PyFrame_FastToLocals(PyFrameObject *);
- PyAPI_FUNC(int) PyFrame_ClearFreeList(void);
- /* Return the line of code the frame is currently executing. */
- PyAPI_FUNC(int) PyFrame_GetLineNumber(PyFrameObject *);
- #ifdef __cplusplus
- }
- #endif
- #endif /* !Py_FRAMEOBJECT_H */
|