Viewing file:  frameobject.h (2.96 KB) -rw-r--r--
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/* 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 (PyDictObject) */
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 */
PyObject *f_exc_type, *f_exc_value, *f_exc_traceback;
PyThreadState *f_tstate;
int f_lasti; /* Last instruction if called */
int f_lineno; /* Current line number */
int f_restricted; /* Flag set if restricted operations
in this scope */
int f_iblock; /* index in f_blockstack */
PyTryBlock f_blockstack[CO_MAXBLOCKS]; /* for try and loop blocks */
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;
/* Standard object interface */
extern DL_IMPORT(PyTypeObject) PyFrame_Type;
#define PyFrame_Check(op) ((op)->ob_type == &PyFrame_Type)
DL_IMPORT(PyFrameObject *) PyFrame_New(PyThreadState *, PyCodeObject *,
PyObject *, PyObject *);
/* The rest of the interface is specific for frame objects */
/* Tuple access macros */
#ifndef Py_DEBUG
#define GETITEM(v, i) PyTuple_GET_ITEM((PyTupleObject *)(v), (i))
#define GETITEMNAME(v, i) \
PyString_AS_STRING((PyStringObject *)GETITEM((v), (i)))
#else
#define GETITEM(v, i) PyTuple_GetItem((v), (i))
#define GETITEMNAME(v, i) PyString_AsString(GETITEM(v, i))
#endif
#define GETUSTRINGVALUE(s) ((unsigned char *)PyString_AS_STRING(s))
/* Code access macros */
#define Getconst(f, i) (GETITEM((f)->f_code->co_consts, (i)))
#define Getname(f, i) (GETITEMNAME((f)->f_code->co_names, (i)))
#define Getnamev(f, i) (GETITEM((f)->f_code->co_names, (i)))
/* Block management functions */
DL_IMPORT(void) PyFrame_BlockSetup(PyFrameObject *, int, int, int);
DL_IMPORT(PyTryBlock *) PyFrame_BlockPop(PyFrameObject *);
/* Extend the value stack */
DL_IMPORT(PyObject **) PyFrame_ExtendStack(PyFrameObject *, int, int);
/* Conversions between "fast locals" and locals in dictionary */
DL_IMPORT(void) PyFrame_LocalsToFast(PyFrameObject *, int);
DL_IMPORT(void) PyFrame_FastToLocals(PyFrameObject *);
#ifdef __cplusplus
}
#endif
#endif /* !Py_FRAMEOBJECT_H */
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