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/* Frame object interface */
#ifndef Py_CPYTHON_FRAMEOBJECT_H
# error "this header file must not be included directly"
#endif
/* These values are chosen so that the inline functions below all
* compare f_state to zero.
*/
enum _framestate {
FRAME_CREATED = -2,
FRAME_SUSPENDED = -1,
FRAME_EXECUTING = 0,
FRAME_RETURNED = 1,
FRAME_UNWINDING = 2,
FRAME_RAISED = 3,
FRAME_CLEARED = 4
};
typedef signed char PyFrameState;
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;
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 */
PyObject *f_trace; /* Trace function */
int f_stackdepth; /* Depth of value stack */
char f_trace_lines; /* Emit per-line trace events? */
char f_trace_opcodes; /* Emit per-opcode trace events? */
/* 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 */
PyFrameState f_state; /* What state the frame is in */
PyTryBlock f_blockstack[CO_MAXBLOCKS]; /* for try and loop blocks */
PyObject *f_localsplus[1]; /* locals+stack, dynamically sized */
};
static inline int _PyFrame_IsRunnable(struct _frame *f) {
return f->f_state < FRAME_EXECUTING;
}
static inline int _PyFrame_IsExecuting(struct _frame *f) {
return f->f_state == FRAME_EXECUTING;
}
static inline int _PyFrameHasCompleted(struct _frame *f) {
return f->f_state > FRAME_EXECUTING;
}
/* Standard object interface */
PyAPI_DATA(PyTypeObject) PyFrame_Type;
#define PyFrame_Check(op) Py_IS_TYPE(op, &PyFrame_Type)
PyAPI_FUNC(PyFrameObject *) PyFrame_New(PyThreadState *, PyCodeObject *,
PyObject *, PyObject *);
/* only internal use */
PyFrameObject* _PyFrame_New_NoTrack(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 *);
/* 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(void) _PyFrame_DebugMallocStats(FILE *out);
PyAPI_FUNC(PyFrameObject *) PyFrame_GetBack(PyFrameObject *frame);
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