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82 lines
2.8 KiB
C
82 lines
2.8 KiB
C
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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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/* In a generator, we need to be able to swap between the exception
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state inside the generator and the exception state of the calling
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frame (which shouldn't be impacted when the generator "yields"
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from an except handler).
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These three fields exist exactly for that, and are unused for
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non-generator frames. See the SAVE_EXC_STATE and SWAP_EXC_STATE
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macros in ceval.c for details of their use. */
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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) (Py_TYPE(op) == &PyFrame_Type)
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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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PyAPI_FUNC(int) PyFrame_ClearFreeList(void);
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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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