90 lines
3.1 KiB
C
90 lines
3.1 KiB
C
|
|
/* 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) (Py_TYPE(op) == &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 */
|