#define GET_BUFFER_VIEW_OR_ERROR(obj, viewp, erraction) do { \

if (PyUnicode_Check((obj))) { \

PyErr_SetString(PyExc_TypeError, \

"Unicode-objects must be encoded before hashing");\

erraction; \

} \

if (!PyObject_CheckBuffer((obj))) { \

PyErr_SetString(PyExc_TypeError, \

"object supporting the buffer API required"); \

erraction; \

} \

if (PyObject_GetBuffer((obj), (viewp), PyBUF_SIMPLE) == -1) { \

erraction; \

} \

if ((viewp)->ndim > 1) { \

PyErr_SetString(PyExc_BufferError, \

"Buffer must be single dimension"); \

PyBuffer_Release((viewp)); \

erraction; \

} \

} while(0)

#define GET_BUFFER_VIEW_OR_ERROUT(obj, viewp) \

GET_BUFFER_VIEW_OR_ERROR(obj, viewp, return NULL)

#include "pythread.h"

#define ENTER_HASHLIB(obj) \

if ((obj)->lock) { \

if (!PyThread_acquire_lock((obj)->lock, 0)) { \

Py_BEGIN_ALLOW_THREADS \

PyThread_acquire_lock((obj)->lock, 1); \

Py_END_ALLOW_THREADS \

} \

}

#define LEAVE_HASHLIB(obj) \

if ((obj)->lock) { \

PyThread_release_lock((obj)->lock); \

}

#define HASHLIB_GIL_MINSIZE 2048