1 files changed, 85 insertions, 0 deletions
diff --git a/tests/buffers/userbuffer.pyx b/tests/buffers/userbuffer.pyx
new file mode 100644
index 000000000..b9c871970
--- /dev/null
+++ b/tests/buffers/userbuffer.pyx
@@ -0,0 +1,85 @@
+import sys
+
+__doc__ = u""
+
+if sys.version_info[:2] == (2, 6):
+    __doc__ += u"""
+>>> memoryview = _memoryview
+"""
+
+__doc__ += u"""
+>>> b1 = UserBuffer1()
+>>> m1 = memoryview(b1)
+>>> m1.tolist()
+[0, 1, 2, 3, 4]
+>>> del m1, b1
+"""
+
+__doc__ += u"""
+>>> b2 = UserBuffer2()
+>>> m2 = memoryview(b2)
+UserBuffer2: getbuffer
+>>> m2.tolist()
+[5, 6, 7, 8, 9]
+>>> del m2, b2
+UserBuffer2: release
+"""
+
+cdef extern from *:
+    ctypedef struct Py_buffer # redeclared
+    enum: PyBUF_SIMPLE
+    int PyBuffer_FillInfo(Py_buffer *, object, void *, Py_ssize_t, bint, int) except -1
+    int  PyObject_GetBuffer(object, Py_buffer *, int) except -1
+    void PyBuffer_Release(Py_buffer *)
+
+cdef char global_buf[5]
+global_buf[0:5] = [0, 1, 2, 3, 4]
+
+cdef class UserBuffer1:
+
+    def __getbuffer__(self, Py_buffer* view, int flags):
+        PyBuffer_FillInfo(view, None, global_buf, 5, 1, flags)
+
+cdef class UserBuffer2:
+    cdef char buf[5]
+
+    def __cinit__(self):
+        self.buf[0:5] = [5, 6, 7, 8, 9]
+
+    def __getbuffer__(self, Py_buffer* view, int flags):
+        print('UserBuffer2: getbuffer')
+        PyBuffer_FillInfo(view, self, self.buf, 5, 0, flags)
+
+    def __releasebuffer__(self, Py_buffer* view):
+        print('UserBuffer2: release')
+
+
+cdef extern from *:
+    ctypedef struct PyBuffer"Py_buffer":
+        void *buf
+        Py_ssize_t len
+        bint readonly
+
+cdef class _memoryview:
+
+    """
+    Memory
+    """
+
+    cdef PyBuffer view
+
+    def __cinit__(self, obj):
+        cdef Py_buffer *view = <Py_buffer*>&self.view
+        PyObject_GetBuffer(obj, view, PyBUF_SIMPLE)
+
+    def __dealloc__(self):
+        cdef Py_buffer *view = <Py_buffer*>&self.view
+        PyBuffer_Release(view )
+        
+    def __getbuffer__(self, Py_buffer *view, int flags):
+        PyBuffer_FillInfo(view, self,
+                          self.view.buf, self.view.len,
+                          self.view.readonly, flags)
+    def tolist(self):
+        cdef char *b = <char *> self.view.buf
+        return [b[i] for i in range(self.view.len)]