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#---------------------------------------------------------------------
cdef extern from "Python.h":
object PyLong_FromVoidPtr(void*)
void* PyLong_AsVoidPtr(object)
cdef extern from "Python.h":
ctypedef void const_void "const void"
int PyObject_AsReadBuffer (object, const_void**, Py_ssize_t*) except -1
int PyObject_AsWriteBuffer(object, void**, Py_ssize_t*) except -1
cdef extern from "Python.h":
object PyBuffer_FromReadWriteMemory(void*, Py_ssize_t)
#---------------------------------------------------------------------
cdef inline object asbuffer_r(object ob, void** bptr, MPI_Aint* blen):
cdef const_void *p = NULL
cdef Py_ssize_t n = 0
PyObject_AsReadBuffer(ob, &p, &n)
if bptr: bptr[0] = <void *>p
if blen: blen[0] = <MPI_Aint>n
return ob
cdef inline object asbuffer_w(object ob, void** bptr, MPI_Aint* blen):
cdef void *p = NULL
cdef Py_ssize_t n = 0
PyObject_AsWriteBuffer(ob, &p, &n)
if bptr: bptr[0] = p
if blen: blen[0] = <MPI_Aint>n
return ob
#---------------------------------------------------------------------
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