Include/funcobject.h

   1
   2 /* Function object interface */
   3
   4 #ifndef Py_FUNCOBJECT_H
   5 #define Py_FUNCOBJECT_H
   6 #ifdef __cplusplus
   7 extern "C" {
   8 #endif
   9
  10 /* Function objects and code objects should not be confused with each other:
  11  *
  12  * Function objects are created by the execution of the 'def' statement.
  13  * They reference a code object in their func_code attribute, which is a
  14  * purely syntactic object, i.e. nothing more than a compiled version of some
  15  * source code lines.  There is one code object per source code "fragment",
  16  * but each code object can be referenced by zero or many function objects
  17  * depending only on how many times the 'def' statement in the source was
  18  * executed so far.
  19  */
  20
  21 typedef struct {
  22     PyObject_HEAD
  23     PyObject *func_code;        /* A code object */
  24     PyObject *func_globals;     /* A dictionary (other mappings won't do) */
  25     PyObject *func_defaults;    /* NULL or a tuple */
  26     PyObject *func_closure;     /* NULL or a tuple of cell objects */
  27     PyObject *func_doc;         /* The __doc__ attribute, can be anything */
  28     PyObject *func_name;        /* The __name__ attribute, a string object */
  29     PyObject *func_dict;        /* The __dict__ attribute, a dict or NULL */
  30     PyObject *func_weakreflist; /* List of weak references */
  31     PyObject *func_module;      /* The __module__ attribute, can be anything */
  32
  33     /* Invariant:
  34      *     func_closure contains the bindings for func_code->co_freevars, so
  35      *     PyTuple_Size(func_closure) == PyCode_GetNumFree(func_code)
  36      *     (func_closure may be NULL if PyCode_GetNumFree(func_code) == 0).
  37      */
  38 } PyFunctionObject;
  39
  40 PyAPI_DATA(PyTypeObject) PyFunction_Type;
  41
  42 #define PyFunction_Check(op) (Py_TYPE(op) == &PyFunction_Type)
  43
  44 PyAPI_FUNC(PyObject *) PyFunction_New(PyObject *, PyObject *);
  45 PyAPI_FUNC(PyObject *) PyFunction_GetCode(PyObject *);
  46 PyAPI_FUNC(PyObject *) PyFunction_GetGlobals(PyObject *);
  47 PyAPI_FUNC(PyObject *) PyFunction_GetModule(PyObject *);
  48 PyAPI_FUNC(PyObject *) PyFunction_GetDefaults(PyObject *);
  49 PyAPI_FUNC(int) PyFunction_SetDefaults(PyObject *, PyObject *);
  50 PyAPI_FUNC(PyObject *) PyFunction_GetClosure(PyObject *);
  51 PyAPI_FUNC(int) PyFunction_SetClosure(PyObject *, PyObject *);
  52
  53 /* Macros for direct access to these values. Type checks are *not*
  54    done, so use with care. */
  55 #define PyFunction_GET_CODE(func) \
  56         (((PyFunctionObject *)func) -> func_code)
  57 #define PyFunction_GET_GLOBALS(func) \
  58         (((PyFunctionObject *)func) -> func_globals)
  59 #define PyFunction_GET_MODULE(func) \
  60         (((PyFunctionObject *)func) -> func_module)
  61 #define PyFunction_GET_DEFAULTS(func) \
  62         (((PyFunctionObject *)func) -> func_defaults)
  63 #define PyFunction_GET_CLOSURE(func) \
  64         (((PyFunctionObject *)func) -> func_closure)
  65
  66 /* The classmethod and staticmethod types lives here, too */
  67 PyAPI_DATA(PyTypeObject) PyClassMethod_Type;
  68 PyAPI_DATA(PyTypeObject) PyStaticMethod_Type;
  69
  70 PyAPI_FUNC(PyObject *) PyClassMethod_New(PyObject *);
  71 PyAPI_FUNC(PyObject *) PyStaticMethod_New(PyObject *);
  72
  73 #ifdef __cplusplus
  74 }
  75 #endif
  76 #endif /* !Py_FUNCOBJECT_H */