blob: 6a0554abc037ab960d82325f76f479e65812a3d5 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
|
# distutils: language = c++
from cython.cimports.cpython import Py_buffer
from cython.cimports.libcpp.vector import vector
@cython.cclass
class Matrix:
view_count: cython.int
ncols: cython.Py_ssize_t
v: vector[cython.float]
# ...
def __cinit__(self, ncols: cython.Py_ssize_t):
self.ncols = ncols
self.view_count = 0
def add_row(self):
if self.view_count > 0:
raise ValueError("can't add row while being viewed")
self.v.resize(self.v.size() + self.ncols)
def __getbuffer__(self, buffer: cython.pointer(Py_buffer), flags: cython.int):
# ... as before
self.view_count += 1
def __releasebuffer__(self, buffer: cython.pointer(Py_buffer)):
self.view_count -= 1
|
