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81 lines
2.8 KiB
81 lines
2.8 KiB
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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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/* If an exception is raised in this frame, the next three are used to |
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* record the exception info (if any) originally in the thread state. See |
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* comments before set_exc_info() -- it's not obvious. |
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* Invariant: if _type is NULL, then so are _value and _traceback. |
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* Desired invariant: all three are NULL, or all three are non-NULL. That |
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* one isn't currently true, but "should be". |
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*/ |
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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) ((op)->ob_type == &PyFrame_Type) |
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#define PyFrame_IsRestricted(f) \ |
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((f)->f_builtins != (f)->f_tstate->interp->builtins) |
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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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#ifdef __cplusplus |
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} |
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#endif |
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#endif /* !Py_FRAMEOBJECT_H */
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