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cpython/Include/frameobject.h at 3.5 · python/cpython · GitHub
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/* Frame object interface */
#ifndef
Py_LIMITED_API
#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 */
/* In a generator, we need to be able to swap between the exception
state inside the generator and the exception state of the calling
frame (which shouldn't be impacted when the generator "yields"
from an except handler).
These three fields exist exactly for that, and are unused for
non-generator frames. See the save_exc_state and swap_exc_state
functions in ceval.c for details of their use. */
PyObject
*
f_exc_type
,
*
f_exc_value
,
*
f_exc_traceback
;
/* Borrowed reference to a generator, or NULL */
PyObject
*
f_gen
;
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 */
char
f_executing
;
/* whether the frame is still executing */
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)
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
(
int
)
PyFrame_FastToLocalsWithError
(
PyFrameObject
*
f
);
PyAPI_FUNC
(
void
)
PyFrame_FastToLocals
(
PyFrameObject
*
);
PyAPI_FUNC
(
int
)
PyFrame_ClearFreeList
(
void
);
PyAPI_FUNC
(
void
)
_PyFrame_DebugMallocStats
(
FILE
*
out
);
/* Return the line of code the frame is currently executing. */
PyAPI_FUNC
(
int
)
PyFrame_GetLineNumber
(
PyFrameObject
*
);
#ifdef
__cplusplus
}
#endif
#endif
/* !Py_FRAMEOBJECT_H */
#endif
/* Py_LIMITED_API */
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