/* Memory view object. In Python this is available as "memoryview". */

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#ifndef Py_MEMORYOBJECT_H

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#define Py_MEMORYOBJECT_H

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#ifdef __cplusplus

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extern "C" {

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#endif

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#ifndef Py_LIMITED_API

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PyAPI_DATA(PyTypeObject) _PyManagedBuffer_Type;

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#endif

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PyAPI_DATA(PyTypeObject) PyMemoryView_Type;

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#define PyMemoryView_Check(op) (Py_TYPE(op) == &PyMemoryView_Type)

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#ifndef Py_LIMITED_API

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/* Get a pointer to the memoryview's private copy of the exporter's buffer. */

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#define PyMemoryView_GET_BUFFER(op) (&((PyMemoryViewObject *)(op))->view)

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/* Get a pointer to the exporting object (this may be NULL!). */

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#define PyMemoryView_GET_BASE(op) (((PyMemoryViewObject *)(op))->view.obj)

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#endif

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PyAPI_FUNC(PyObject *) PyMemoryView_FromObject(PyObject *base);

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#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x03030000

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PyAPI_FUNC(PyObject *) PyMemoryView_FromMemory(char *mem, Py_ssize_t size,

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int flags);

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#endif

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#ifndef Py_LIMITED_API

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PyAPI_FUNC(PyObject *) PyMemoryView_FromBuffer(Py_buffer *info);

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#endif

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PyAPI_FUNC(PyObject *) PyMemoryView_GetContiguous(PyObject *base,

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int buffertype,

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char order);

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/* The structs are declared here so that macros can work, but they shouldn't

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be considered public. Don't access their fields directly, use the macros

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and functions instead! */

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#ifndef Py_LIMITED_API

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#define _Py_MANAGED_BUFFER_RELEASED 0x001 /* access to exporter blocked */

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#define _Py_MANAGED_BUFFER_FREE_FORMAT 0x002 /* free format */

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typedef struct {

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PyObject_HEAD

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int flags; /* state flags */

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Py_ssize_t exports; /* number of direct memoryview exports */

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Py_buffer master; /* snapshot buffer obtained from the original exporter */

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} _PyManagedBufferObject;

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/* memoryview state flags */

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#define _Py_MEMORYVIEW_RELEASED 0x001 /* access to master buffer blocked */

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#define _Py_MEMORYVIEW_C 0x002 /* C-contiguous layout */

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#define _Py_MEMORYVIEW_FORTRAN 0x004 /* Fortran contiguous layout */

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#define _Py_MEMORYVIEW_SCALAR 0x008 /* scalar: ndim = 0 */

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#define _Py_MEMORYVIEW_PIL 0x010 /* PIL-style layout */

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typedef struct {

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PyObject_VAR_HEAD

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_PyManagedBufferObject *mbuf; /* managed buffer */

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Py_hash_t hash; /* hash value for read-only views */

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int flags; /* state flags */

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Py_ssize_t exports; /* number of buffer re-exports */

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Py_buffer view; /* private copy of the exporter's view */

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PyObject *weakreflist;

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Py_ssize_t ob_array[1]; /* shape, strides, suboffsets */

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} PyMemoryViewObject;

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#endif

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#ifdef __cplusplus

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}

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#endif

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#endif /* !Py_MEMORYOBJECT_H */

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