Alb*_*ert 7 python debugging opencv memory-leaks cpython
我在这里问,因为到目前为止我还没有得到OpenCV开发人员的任何帮助.我把问题简化为一个非常简单的测试用例,所以可能有CPython背景的人都可以在这里提供帮助.
这个C代码不泄漏:
int main() {
while(true) {
int hist_size[] = {40};
float range[] = {0.0f,255.0f};
float* ranges[] = {range};
CvHistogram* hist = cvCreateHist(1, hist_size, CV_HIST_ARRAY, ranges, 1);
cvReleaseHist(&hist);
}
}
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这个Python代码确实泄漏:
while True: cv.CreateHist([40], cv.CV_HIST_ARRAY, [[0,255]], 1)
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我搜索了CPython代码(OpenCVs当前的SVN中继代码),发现了这个:
struct cvhistogram_t {
PyObject_HEAD
CvHistogram h;
PyObject *bins;
};
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...
/* cvhistogram */
static void cvhistogram_dealloc(PyObject *self)
{
cvhistogram_t *cvh = (cvhistogram_t*)self;
Py_DECREF(cvh->bins);
PyObject_Del(self);
}
static PyTypeObject cvhistogram_Type = {
PyObject_HEAD_INIT(&PyType_Type)
0, /*size*/
MODULESTR".cvhistogram", /*name*/
sizeof(cvhistogram_t), /*basicsize*/
};
static PyObject *cvhistogram_getbins(cvhistogram_t *cvh)
{
Py_INCREF(cvh->bins);
return cvh->bins;
}
static PyGetSetDef cvhistogram_getseters[] = {
{(char*)"bins", (getter)cvhistogram_getbins, (setter)NULL, (char*)"bins", NULL},
{NULL} /* Sentinel */
};
static void cvhistogram_specials(void)
{
cvhistogram_Type.tp_dealloc = cvhistogram_dealloc;
cvhistogram_Type.tp_getset = cvhistogram_getseters;
}
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...
static PyObject *pycvCreateHist(PyObject *self, PyObject *args, PyObject *kw)
{
const char *keywords[] = { "dims", "type", "ranges", "uniform", NULL };
PyObject *dims;
int type;
float **ranges = NULL;
int uniform = 1;
if (!PyArg_ParseTupleAndKeywords(args, kw, "Oi|O&i", (char**)keywords, &dims, &type, convert_to_floatPTRPTR, (void*)&ranges, &uniform)) {
return NULL;
}
cvhistogram_t *h = PyObject_NEW(cvhistogram_t, &cvhistogram_Type);
args = Py_BuildValue("Oi", dims, CV_32FC1);
h->bins = pycvCreateMatND(self, args);
Py_DECREF(args);
if (h->bins == NULL) {
return NULL;
}
h->h.type = CV_HIST_MAGIC_VAL;
if (!convert_to_CvArr(h->bins, &(h->h.bins), "bins"))
return NULL;
ERRWRAP(cvSetHistBinRanges(&(h->h), ranges, uniform));
return (PyObject*)h;
}
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从OpenCV C头文件:
typedef struct CvHistogram
{
int type;
CvArr* bins;
float thresh[CV_MAX_DIM][2]; /* For uniform histograms. */
float** thresh2; /* For non-uniform histograms. */
CvMatND mat; /* Embedded matrix header for array histograms. */
}
CvHistogram;
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我并不完全理解所有内容,因为我之前从未使用过C接口.但是我正在搜索的错误可能就是这段代码中的某个地方.
我对吗?或者我应该在哪里搜索错误?我该如何解决?
(注意那些看过这个问题的早期版本的人:我查看了错误的代码.他们的SWIG界面已被弃用,不再使用了(但代码仍然存在于SVN中,这就是为什么我把它弄糊涂了.所以不要看一下interfaces/swig,这段代码很旧而且没用过.目前的代码都存在modules/python.)
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