Get rid of a lot of entry declarations + optional argument to not allocate buffer in cython.array

Cython/Compiler/Buffer.py

@@ -535,6 +535,7 @@ class GetAndReleaseBufferUtilityCode(object):
     # which has the right tp_flags set, but emulation otherwise.
 
     requires = None
+    is_cython_utility = False
 
     def __init__(self):
         pass

Cython/Compiler/CythonScope.py

@@ -73,6 +73,7 @@ class CythonScope(ModuleScope):
         # "end-users" but nobody will know it is there anyway...
         cython_testscope_utility_code.declare_in_scope(self)
         cython_test_extclass_utility_code.declare_in_scope(self)
+        cython_array_utility_code.declare_in_scope(self)
 
         #
         # The view sub-scope
@@ -84,66 +85,7 @@ class CythonScope(ModuleScope):
 
         cythonview_testscope_utility_code.declare_in_scope(viewscope)
 
-        for x in ('strided', 'contig', 'follow', 'direct', 'ptr', 'full'):
-            entry = viewscope.declare_var(x, py_object_type, None,
-                                          cname='__pyx_viewaxis_%s' % x,
-                                          is_cdef=True)
-            entry.utility_code_definition = view_utility_code
-
-        #
-        # cython.view.memoryview declaration
-        #
-        self.memviewentry = entry = viewscope.declare_c_class(memview_name, None,
-                implementing=1,
-                objstruct_cname = memview_objstruct_cname,
-                typeobj_cname = memview_typeobj_cname,
-                typeptr_cname= memview_typeptr_cname)
-
-        entry.utility_code_definition = view_utility_code
-
-        #
-        # cython.array declaration
-        #
-        name = u'array'
-        entry = self.declare_c_class(name, None,
-                implementing=1,
-                objstruct_cname='__pyx_obj_array',
-                typeobj_cname='__pyx_tobj_array',
-                typeptr_cname=Naming.typeptr_prefix+name)
-
-        # NOTE: the typeptr_cname is constrained to be '__pyx_ptype_<name>'
-        # (name is 'array' in this case).  otherwise the code generation for
-        # the struct pointers will not work!
-
-        entry.utility_code_definition = cython_array_utility_code
-
-        arr_scope = entry.type.scope
-
-        arr_scope.declare_var(u'data', c_char_ptr_type, None, is_cdef = 1)
-        arr_scope.declare_var(u'len', c_size_t_type, None, is_cdef = 1)
-        arr_scope.declare_var(u'format', c_char_ptr_type, None, is_cdef = 1)
-        arr_scope.declare_var(u'ndim', c_int_type, None, is_cdef = 1)
-        arr_scope.declare_var(u'shape', c_py_ssize_t_ptr_type, None, is_cdef = 1)
-        arr_scope.declare_var(u'strides', c_py_ssize_t_ptr_type, None, is_cdef = 1)
-        arr_scope.declare_var(u'itemsize', c_py_ssize_t_type, None, is_cdef = 1)
-
-        # declare the __getbuffer__ & __releasebuffer__ functions
-
-        for idx, name in enumerate(('__getbuffer__', '__releasebuffer__')):
-            entry = arr_scope.declare_pyfunction(name, None)
-            # FIXME XXX: hack right here!!!
-            entry.func_cname = '__pyx_pf_9__pyxutil_5array_%d' % (idx + 1) + name
-            entry.utility_code_definition = cython_array_utility_code
-
-        #
-        # Declare the array modes
-        #
-        entry = self.declare_var(u'PyBUF_C_CONTIGUOUS', c_int_type, None,
-                cname='PyBUF_C_CONTIGUOUS',is_cdef = 1)
-        entry = self.declare_var(u'PyBUF_F_CONTIGUOUS', c_int_type, None,
-                is_cdef = 1)
-        entry = self.declare_var(u'PyBUF_ANY_CONTIGUOUS', c_int_type, None,
-                is_cdef = 1)
+        view_utility_code.declare_in_scope(viewscope)
 
 
 def create_cython_scope(context, create_testscope):
@@ -167,9 +109,9 @@ cdef object _testscope(int value):
 undecorated_methods_protos = UtilityCode(proto=u"""
     /* These methods are undecorated and have therefore no prototype */
     static PyObject *__pyx_TestClass_cdef_method(
-            struct __pyx_TestClass *self, int value);
+            struct __pyx_TestClass_obj *self, int value);
     static PyObject *__pyx_TestClass_cpdef_method(
-            struct __pyx_TestClass *self, int value, int skip_dispatch);
+            struct __pyx_TestClass_obj *self, int value, int skip_dispatch);
     static PyObject *__pyx_TestClass_def_method(
             PyObject *self, PyObject *value);
 """)
@@ -237,9 +179,8 @@ cdef object _testscope(int value):
 """)
 
 memview_name = u'memoryview'
-memview_typeptr_cname = Naming.typeptr_prefix+memview_name
-memview_typeobj_cname = '__pyx_tobj_'+memview_name
-memview_objstruct_cname = '__pyx_obj_'+memview_name
+memview_typeptr_cname = '__pyx_memoryview_type'
+memview_objstruct_cname = '__pyx_memoryview_obj'
 view_utility_code = CythonUtilityCode(
 u"""
 cdef class Enum(object):
@@ -260,6 +201,7 @@ cdef extern from *:
     int __Pyx_GetBuffer(object, Py_buffer *, int)
     void __Pyx_ReleaseBuffer(Py_buffer *)
 
+@cname('__pyx_memoryview')
 cdef class memoryview(object):
 
     cdef object obj
@@ -274,13 +216,11 @@ cdef class memoryview(object):
         self.obj = None
         __Pyx_ReleaseBuffer(&self.view)
 
+@cname('__pyx_memoryview_new')
 cdef memoryview memoryview_cwrapper(object o, int flags):
     return memoryview(o, flags)
-""", name="view_code",
-    prefix="__pyx_viewaxis_",
-    requires=(Buffer.GetAndReleaseBufferUtilityCode(),))
+""", name="view_code", requires=(Buffer.GetAndReleaseBufferUtilityCode(),))
 
-cyarray_prefix = u'__pyx_cythonarray_'
 cython_array_utility_code = CythonUtilityCode(u'''
 cdef extern from "stdlib.h":
     void *malloc(size_t)
@@ -293,6 +233,7 @@ cdef extern from "Python.h":
         PyBUF_F_CONTIGUOUS,
         PyBUF_ANY_CONTIGUOUS
 
+@cname("__pyx_array")
 cdef class array:
 
     cdef:
@@ -304,8 +245,10 @@ cdef class array:
         Py_ssize_t *strides
         Py_ssize_t itemsize
         str mode
+        void (*callback_free_data)(char *data)
 
-    def __cinit__(array self, tuple shape, Py_ssize_t itemsize, char *format, mode="c"):
+    def __cinit__(array self, tuple shape, Py_ssize_t itemsize, char *format,
+                  mode="c", bint allocate_buffer=True):
 
         self.ndim = len(shape)
         self.itemsize = itemsize
@@ -358,9 +301,14 @@ cdef class array:
 
         self.mode = mode
 
+        if allocate_buffer:
             self.data = <char *>malloc(self.len)
             if not self.data:
                 raise MemoryError("unable to allocate array data.")
+        else:
+            self.data = NULL
+
+        self.callback_free_data = NULL
 
     def __getbuffer__(self, Py_buffer *info, int flags):
 
@@ -389,6 +337,9 @@ cdef class array:
 
     def __dealloc__(array self):
         if self.data:
+            if self.callback_free_data != NULL:
+                self.callback_free_data(self.data)
+            else:
                 free(self.data)
             self.data = NULL
         if self.strides:
@@ -400,7 +351,7 @@ cdef class array:
         self.format = NULL
         self.itemsize = 0
 
+@cname("__pyx_array_new")
 cdef array array_cwrapper(tuple shape, Py_ssize_t itemsize, char *format, char *mode):
     return array(shape, itemsize, format, mode)
-
-''', prefix=cyarray_prefix)
+''')

Cython/Compiler/ExprNodes.py

@@ -7630,8 +7630,7 @@ class CoerceToMemViewSliceNode(CoercionNode):
         import MemoryView, Buffer
         memviewobj = code.funcstate.allocate_temp(PyrexTypes.py_object_type, manage_ref=True)
         buf_flag = MemoryView.get_buf_flag(self.type.axes)
-        code.putln("%s = (PyObject *)"
-                "__pyx_viewaxis_memoryview_cwrapper(%s, %s);" %\
+        code.putln("%s = (PyObject *) __pyx_memoryview_new(%s, %s);" %
                                 (memviewobj, self.arg.py_result(), buf_flag))
         code.putln(code.error_goto_if_PyErr(self.pos))
         ndim = len(self.type.axes)
@@ -7658,7 +7657,7 @@ class CoerceToMemViewSliceNode(CoercionNode):
         else:
             c_or_f_flag = "0"
         code.putln(code.error_goto_if("-1 == __Pyx_ValidateAndInit_memviewslice("
-                        "(struct __pyx_obj_memoryview *) %(memviewobj)s,"
+                        "(struct __pyx_memoryview_obj *) %(memviewobj)s,"
                         " %(spec_int_arr)s, %(c_or_f_flag)s, %(ndim)d,"
                         " &%(dtype_typeinfo)s, __pyx_stack, &%(result)s)" % locals(), self.pos))
         code.putln("}")

Cython/Compiler/MemoryView.py

@@ -378,7 +378,7 @@ static int %(cfunc_name)s(const __Pyx_memviewslice *from_mvs, __Pyx_memviewslice
 
     char *to_buf = (char *)to_mvs->data;
     char *from_buf = (char *)from_mvs->data;
-    struct __pyx_obj_memoryview *temp_memview = 0;
+    struct __pyx_memoryview_obj *temp_memview = 0;
     char *temp_data = 0;
 
     int ndim_idx = 0;
@@ -700,13 +700,13 @@ static __Pyx_memviewslice %(copy_name)s(const __Pyx_memviewslice from_mvs) {
     __Pyx_RefNannyDeclarations
     int i;
     __Pyx_memviewslice new_mvs = {0, 0};
-    struct __pyx_obj_memoryview *from_memview = from_mvs.memview;
+    struct __pyx_memoryview_obj *from_memview = from_mvs.memview;
     Py_buffer *buf = &from_memview->view;
     PyObject *shape_tuple = 0;
     PyObject *temp_int = 0;
-    struct __pyx_obj_array *array_obj = 0;
-    struct __pyx_obj_memoryview *memview_obj = 0;
-    char mode[] = "%(mode)s";
+    struct __pyx_array_obj *array_obj = 0;
+    struct __pyx_memoryview_obj *memview_obj = 0;
+    char *mode = "%(mode)s";
 
     __Pyx_RefNannySetupContext("%(copy_name)s");
 
@@ -726,13 +726,13 @@ static __Pyx_memviewslice %(copy_name)s(const __Pyx_memviewslice from_mvs) {
         }
     }
 
-    array_obj = __pyx_cythonarray_array_cwrapper(shape_tuple, %(sizeof_dtype)s, buf->format, mode);
+    array_obj = __pyx_array_new(shape_tuple, %(sizeof_dtype)s, buf->format, mode);
     if (unlikely(!array_obj)) {
         goto fail;
     }
     __Pyx_GOTREF(array_obj);
 
-    memview_obj = __pyx_viewaxis_memoryview_cwrapper((PyObject *)array_obj, %(contig_flag)s);
+    memview_obj = __pyx_memoryview_new((PyObject *) array_obj, %(contig_flag)s);
     if (unlikely(!memview_obj)) {
         goto fail;
     }
@@ -810,18 +810,18 @@ memviewslice_init_code = UtilityCode(proto="""\
 #define __Pyx_IS_C_CONTIG 1
 #define __Pyx_IS_F_CONTIG 2
 
-static int __Pyx_ValidateAndInit_memviewslice(struct __pyx_obj_memoryview *memview, 
+static int __Pyx_ValidateAndInit_memviewslice(struct __pyx_memoryview_obj *memview,
                                 int *axes_specs, int c_or_f_flag,  int ndim, __Pyx_TypeInfo *dtype,
                                 __Pyx_BufFmt_StackElem stack[], __Pyx_memviewslice *memviewslice);
 
 static int __Pyx_init_memviewslice(
-                struct __pyx_obj_memoryview *memview,
+                struct __pyx_memoryview_obj *memview,
                 int ndim,
                 __Pyx_memviewslice *memviewslice);
 """ % {'BUF_MAX_NDIMS' :Options.buffer_max_dims},
 impl = """\
 static int __Pyx_ValidateAndInit_memviewslice(
-                struct __pyx_obj_memoryview *memview,
+                struct __pyx_memoryview_obj *memview,
                 int *axes_specs,
                 int c_or_f_flag,
                 int ndim,
@@ -951,7 +951,7 @@ no_fail:
 }
 
 static int __Pyx_init_memviewslice(
-                struct __pyx_obj_memoryview *memview,
+                struct __pyx_memoryview_obj *memview,
                 int ndim,
                 __Pyx_memviewslice *memviewslice) {
 

Cython/Compiler/Nodes.py

@@ -6986,9 +6986,9 @@ class CnameDecoratorNode(StatNode):
             scope = self.node.scope
 
             e.cname = self.cname
-            e.type.objstruct_cname = self.cname
+            e.type.objstruct_cname = self.cname + '_obj'
             e.type.typeobj_cname = Naming.typeobj_prefix + self.cname
-            e.type.typeptr_cname = Naming.typeptr_prefix + self.cname
+            e.type.typeptr_cname = self.cname + '_type'
 
             e.as_variable.cname = py_object_type.cast_code(e.type.typeptr_cname)
 
@@ -7002,6 +7002,7 @@ class CnameDecoratorNode(StatNode):
         self.node.analyse_expressions(env)
 
     def generate_function_definitions(self, env, code):
+        "Ensure a prototype for every @cname method in the right place"
         if self.is_function and env.is_c_class_scope:
             # method in cdef class, generate a prototype in the header
             h_code = code.globalstate['utility_code_proto']

Cython/Compiler/Parsing.py

@@ -2075,7 +2075,7 @@ def is_memoryviewslice_access(s):
         if s.sy == ':':
             retval = True
 
-    for sv in reversed(saved):
+    for sv in saved[::-1]:
         s.put_back(*sv)
 
     return retval

Cython/Compiler/PyrexTypes.py

@@ -2690,8 +2690,8 @@ c_pyx_buffer_ptr_type = CPtrType(c_pyx_buffer_type)
 c_pyx_buffer_nd_type = CStructOrUnionType("__Pyx_LocalBuf_ND", "struct",
                                       None, 1, "__Pyx_LocalBuf_ND")
 
-cython_memoryview_type = CStructOrUnionType("__pyx_obj_memoryview", "struct",
-                                      None, 0, "__pyx_obj_memoryview")
+cython_memoryview_type = CStructOrUnionType("__pyx_memoryview_obj", "struct",
+                                      None, 0, "__pyx_memoryview_obj")
 
 cython_memoryview_ptr_type = CPtrType(cython_memoryview_type)
 

Cython/Compiler/UtilityCode.py

@@ -51,8 +51,8 @@ class CythonUtilityCode(object):
     Functions decorated with @cname('c_func_name') get the given cname.
 
     For cdef classes the rules are as follows:
-        obj struct      -> <cname>
-        obj type ptr    -> __pyx_ptype_<cname>
+        obj struct      -> <cname>_obj
+        obj type ptr    -> <cname>_type
         methods         -> <class_cname>_<method_cname>
 
     For methods the cname decorator is optional, but without the decorator the

tests/run/cythonscope.pyx

@@ -5,13 +5,15 @@ from cython cimport TestClass, _testclass_new as TestClass_New
 from cython cimport test_call, test_dep
 from cython.view cimport _testscope as viewtester
 
+from cpython cimport PyObject
+
 cdef extern from *:
     # TestClass stuff
-    cdef struct __pyx_TestClass:
+    cdef struct __pyx_TestClass_obj:
         int value
 
     # Type pointer
-    cdef __pyx_TestClass *TestClassType "__pyx_ptype___pyx_TestClass"
+    cdef PyObject *TestClassType "__pyx_TestClass_type"
 
     # This is a cdef function
     cdef __pyx_TestClass_New(int)
@@ -50,14 +52,14 @@ def test_cdef_class_cython_utility():
     TestClass(20)
     TestClass(50)
     """
-    cdef __pyx_TestClass *objstruct
+    cdef __pyx_TestClass_obj *objstruct
 
     obj =  TestClass_New(7)
-    objstruct = <__pyx_TestClass *> obj
+    objstruct = <__pyx_TestClass_obj *> obj
     print objstruct.value
 
     obj =  __pyx_TestClass_New(14)
-    objstruct = <__pyx_TestClass *> obj
+    objstruct = <__pyx_TestClass_obj *> obj
     print objstruct.value
 
     print (<object> TestClassType)(20)