Mercurial > hg > vamp-build-and-test
comparison DEPENDENCIES/mingw32/Python27/include/memoryobject.h @ 87:2a2c65a20a8b
Add Python libs and headers
author | Chris Cannam |
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date | Wed, 25 Feb 2015 14:05:22 +0000 |
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86:413a9d26189e | 87:2a2c65a20a8b |
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1 /* Memory view object. In Python this is available as "memoryview". */ | |
2 | |
3 #ifndef Py_MEMORYOBJECT_H | |
4 #define Py_MEMORYOBJECT_H | |
5 #ifdef __cplusplus | |
6 extern "C" { | |
7 #endif | |
8 | |
9 PyAPI_DATA(PyTypeObject) PyMemoryView_Type; | |
10 | |
11 #define PyMemoryView_Check(op) (Py_TYPE(op) == &PyMemoryView_Type) | |
12 | |
13 /* Get a pointer to the underlying Py_buffer of a memoryview object. */ | |
14 #define PyMemoryView_GET_BUFFER(op) (&((PyMemoryViewObject *)(op))->view) | |
15 /* Get a pointer to the PyObject from which originates a memoryview object. */ | |
16 #define PyMemoryView_GET_BASE(op) (((PyMemoryViewObject *)(op))->view.obj) | |
17 | |
18 | |
19 PyAPI_FUNC(PyObject *) PyMemoryView_GetContiguous(PyObject *base, | |
20 int buffertype, | |
21 char fort); | |
22 | |
23 /* Return a contiguous chunk of memory representing the buffer | |
24 from an object in a memory view object. If a copy is made then the | |
25 base object for the memory view will be a *new* bytes object. | |
26 | |
27 Otherwise, the base-object will be the object itself and no | |
28 data-copying will be done. | |
29 | |
30 The buffertype argument can be PyBUF_READ, PyBUF_WRITE, | |
31 PyBUF_SHADOW to determine whether the returned buffer | |
32 should be READONLY, WRITABLE, or set to update the | |
33 original buffer if a copy must be made. If buffertype is | |
34 PyBUF_WRITE and the buffer is not contiguous an error will | |
35 be raised. In this circumstance, the user can use | |
36 PyBUF_SHADOW to ensure that a a writable temporary | |
37 contiguous buffer is returned. The contents of this | |
38 contiguous buffer will be copied back into the original | |
39 object after the memoryview object is deleted as long as | |
40 the original object is writable and allows setting an | |
41 exclusive write lock. If this is not allowed by the | |
42 original object, then a BufferError is raised. | |
43 | |
44 If the object is multi-dimensional and if fortran is 'F', | |
45 the first dimension of the underlying array will vary the | |
46 fastest in the buffer. If fortran is 'C', then the last | |
47 dimension will vary the fastest (C-style contiguous). If | |
48 fortran is 'A', then it does not matter and you will get | |
49 whatever the object decides is more efficient. | |
50 | |
51 A new reference is returned that must be DECREF'd when finished. | |
52 */ | |
53 | |
54 PyAPI_FUNC(PyObject *) PyMemoryView_FromObject(PyObject *base); | |
55 | |
56 PyAPI_FUNC(PyObject *) PyMemoryView_FromBuffer(Py_buffer *info); | |
57 /* create new if bufptr is NULL | |
58 will be a new bytesobject in base */ | |
59 | |
60 | |
61 /* The struct is declared here so that macros can work, but it shouldn't | |
62 be considered public. Don't access those fields directly, use the macros | |
63 and functions instead! */ | |
64 typedef struct { | |
65 PyObject_HEAD | |
66 PyObject *base; | |
67 Py_buffer view; | |
68 } PyMemoryViewObject; | |
69 | |
70 | |
71 #ifdef __cplusplus | |
72 } | |
73 #endif | |
74 #endif /* !Py_MEMORYOBJECT_H */ |