venv/Include/greenlet/greenlet.h

   1 /* vim:set noet ts=8 sw=8 : */
   2
   3 /* Greenlet object interface */
   4
   5 #ifndef Py_GREENLETOBJECT_H
   6 #define Py_GREENLETOBJECT_H
   7
   8 #include <Python.h>
   9
  10 #ifdef __cplusplus
  11 extern "C" {
  12 #endif
  13
  14 #define GREENLET_VERSION "0.4.12"
  15
  16 typedef struct _greenlet {
  17         PyObject_HEAD
  18         char* stack_start;
  19         char* stack_stop;
  20         char* stack_copy;
  21         intptr_t stack_saved;
  22         struct _greenlet* stack_prev;
  23         struct _greenlet* parent;
  24         PyObject* run_info;
  25         struct _frame* top_frame;
  26         int recursion_depth;
  27         PyObject* weakreflist;
  28         PyObject* exc_type;
  29         PyObject* exc_value;
  30         PyObject* exc_traceback;
  31         PyObject* dict;
  32 } PyGreenlet;
  33
  34 #define PyGreenlet_Check(op)      PyObject_TypeCheck(op, &PyGreenlet_Type)
  35 #define PyGreenlet_MAIN(op)       (((PyGreenlet*)(op))->stack_stop == (char*) -1)
  36 #define PyGreenlet_STARTED(op)    (((PyGreenlet*)(op))->stack_stop != NULL)
  37 #define PyGreenlet_ACTIVE(op)     (((PyGreenlet*)(op))->stack_start != NULL)
  38 #define PyGreenlet_GET_PARENT(op) (((PyGreenlet*)(op))->parent)
  39
  40 #if (PY_MAJOR_VERSION == 2 && PY_MINOR_VERSION >= 7) || (PY_MAJOR_VERSION == 3 && PY_MINOR_VERSION >= 1) || PY_MAJOR_VERSION > 3
  41 #define GREENLET_USE_PYCAPSULE
  42 #endif
  43
  44 /* C API functions */
  45
  46 /* Total number of symbols that are exported */
  47 #define PyGreenlet_API_pointers  8
  48
  49 #define PyGreenlet_Type_NUM       0
  50 #define PyExc_GreenletError_NUM   1
  51 #define PyExc_GreenletExit_NUM    2
  52
  53 #define PyGreenlet_New_NUM        3
  54 #define PyGreenlet_GetCurrent_NUM 4
  55 #define PyGreenlet_Throw_NUM      5
  56 #define PyGreenlet_Switch_NUM     6
  57 #define PyGreenlet_SetParent_NUM  7
  58
  59 #ifndef GREENLET_MODULE
  60 /* This section is used by modules that uses the greenlet C API */
  61 static void **_PyGreenlet_API = NULL;
  62
  63 #define PyGreenlet_Type (*(PyTypeObject *) _PyGreenlet_API[PyGreenlet_Type_NUM])
  64
  65 #define PyExc_GreenletError \
  66         ((PyObject *) _PyGreenlet_API[PyExc_GreenletError_NUM])
  67
  68 #define PyExc_GreenletExit \
  69         ((PyObject *) _PyGreenlet_API[PyExc_GreenletExit_NUM])
  70
  71 /*
  72  * PyGreenlet_New(PyObject *args)
  73  *
  74  * greenlet.greenlet(run, parent=None)
  75  */
  76 #define PyGreenlet_New \
  77         (* (PyGreenlet * (*)(PyObject *run, PyGreenlet *parent)) \
  78          _PyGreenlet_API[PyGreenlet_New_NUM])
  79
  80 /*
  81  * PyGreenlet_GetCurrent(void)
  82  *
  83  * greenlet.getcurrent()
  84  */
  85 #define PyGreenlet_GetCurrent \
  86         (* (PyGreenlet * (*)(void)) _PyGreenlet_API[PyGreenlet_GetCurrent_NUM])
  87
  88 /*
  89  * PyGreenlet_Throw(
  90  *         PyGreenlet *greenlet,
  91  *         PyObject *typ,
  92  *         PyObject *val,
  93  *         PyObject *tb)
  94  *
  95  * g.throw(...)
  96  */
  97 #define PyGreenlet_Throw \
  98         (* (PyObject * (*) \
  99             (PyGreenlet *self, PyObject *typ, PyObject *val, PyObject *tb)) \
 100          _PyGreenlet_API[PyGreenlet_Throw_NUM])
 101
 102 /*
 103  * PyGreenlet_Switch(PyGreenlet *greenlet, PyObject *args)
 104  *
 105  * g.switch(*args, **kwargs)
 106  */
 107 #define PyGreenlet_Switch \
 108         (* (PyObject * (*)(PyGreenlet *greenlet, PyObject *args, PyObject *kwargs)) \
 109          _PyGreenlet_API[PyGreenlet_Switch_NUM])
 110
 111 /*
 112  * PyGreenlet_SetParent(PyObject *greenlet, PyObject *new_parent)
 113  *
 114  * g.parent = new_parent
 115  */
 116 #define PyGreenlet_SetParent \
 117         (* (int (*)(PyGreenlet *greenlet, PyGreenlet *nparent)) \
 118          _PyGreenlet_API[PyGreenlet_SetParent_NUM])
 119
 120 /* Macro that imports greenlet and initializes C API */
 121 #ifdef GREENLET_USE_PYCAPSULE
 122 #define PyGreenlet_Import() \
 123 { \
 124         _PyGreenlet_API = (void**)PyCapsule_Import("greenlet._C_API", 0); \
 125 }
 126 #else
 127 #define PyGreenlet_Import() \
 128 { \
 129         PyObject *module = PyImport_ImportModule("greenlet"); \
 130         if (module != NULL) { \
 131                 PyObject *c_api_object = PyObject_GetAttrString( \
 132                         module, "_C_API"); \
 133                 if (c_api_object != NULL && PyCObject_Check(c_api_object)) { \
 134                         _PyGreenlet_API = \
 135                                 (void **) PyCObject_AsVoidPtr(c_api_object); \
 136                         Py_DECREF(c_api_object); \
 137                 } \
 138                 Py_DECREF(module); \
 139         } \
 140 }
 141 #endif
 142
 143 #endif /* GREENLET_MODULE */
 144
 145 #ifdef __cplusplus
 146 }
 147 #endif
 148 #endif /* !Py_GREENLETOBJECT_H */