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Open Source Computer Vision Library
https://opencv.org/
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75 lines
3.5 KiB
75 lines
3.5 KiB
/*M/////////////////////////////////////////////////////////////////////////////////////// |
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// |
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// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING. |
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// |
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// By downloading, copying, installing or using the software you agree to this license. |
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// If you do not agree to this license, do not download, install, |
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// copy or use the software. |
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// |
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// |
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// Intel License Agreement |
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// For Open Source Computer Vision Library |
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// |
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// Copyright (C) 2000, Intel Corporation, all rights reserved. |
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// Third party copyrights are property of their respective owners. |
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// |
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// Redistribution and use in source and binary forms, with or without modification, |
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// are permitted provided that the following conditions are met: |
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// |
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// * Redistribution's of source code must retain the above copyright notice, |
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// this list of conditions and the following disclaimer. |
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// |
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// * Redistribution's in binary form must reproduce the above copyright notice, |
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// this list of conditions and the following disclaimer in the documentation |
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// and/or other materials provided with the distribution. |
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// |
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// * The name of Intel Corporation may not be used to endorse or promote products |
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// derived from this software without specific prior written permission. |
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// |
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// This software is provided by the copyright holders and contributors "as is" and |
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// any express or implied warranties, including, but not limited to, the implied |
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// warranties of merchantability and fitness for a particular purpose are disclaimed. |
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// In no event shall the Intel Corporation or contributors be liable for any direct, |
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// indirect, incidental, special, exemplary, or consequential damages |
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// (including, but not limited to, procurement of substitute goods or services; |
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// loss of use, data, or profits; or business interruption) however caused |
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// and on any theory of liability, whether in contract, strict liability, |
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// or tort (including negligence or otherwise) arising in any way out of |
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// the use of this software, even if advised of the possibility of such damage. |
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// |
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//M*/ |
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/* This file contains swig macros that are used in several typemap files */ |
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%define %myshadow(function) |
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%ignore function; |
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%rename (function) function##_Shadow; |
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%enddef |
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// Elsewhere in this wrapper, the cvRelease* functions are mapped to |
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// the destructors for the corresponding OpenCV object wrapper. This |
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// is done in order to let Python handle memory management. If the |
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// reference count of the Python object wrapping the OpenCV object |
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// goes to 0, the garbage collector will call the destructor, and |
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// therefore the cvRelease* function, before freeing the Python object. |
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// However, if the user explicitly calls the cvRelease* function, we |
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// must prevent the Python garbage collector from calling it again when |
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// the refcount reaches 0 -- otherwise a double-free error occurs. |
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// |
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// Thus, below, we redirect each cvRelease* function to the |
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// corresponding OpenCV object's destructor. This has the effect of: |
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// (1) Calling the corresponding cvRelease* function, and therefore |
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// immediately releasing the OpenCV object. |
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// (2) Telling SWIG to disown memory management for this OpenCV object. |
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// |
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// Thus, when the refcount for the Python object reaches 0, the Python |
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// object is garbage collected, but since it no longer owns the OpenCV |
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// object, this is not freed again. |
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%define %myrelease(module, Function, Type) |
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%ignore Function; |
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%rename (Function) Function##_Shadow; |
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%pythoncode %{ |
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Function = _##module##.delete_##Type |
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%} |
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%enddef
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