/* 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 */ |