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fix opencv/opencv#20594 - exception handling with refcounts

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This commit is contained in:
Dale Phurrough
2021-08-24 18:56:25 +02:00
parent 9bda96d39e
commit 54a9e00970
3 changed files with 66 additions and 28 deletions
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modules/core/src/umatrix.cpp
+40 -23
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@@ -540,13 +540,26 @@ UMat Mat::getUMat(int accessFlags, UMatUsageFlags usageFlags) const
CV_XADD(&(u->refcount), 1);
CV_XADD(&(u->urefcount), 1);
}
hdr.flags = flags;
setSize(hdr, dims, size.p, step.p);
finalizeHdr(hdr);
hdr.u = new_u;
hdr.offset = 0; //data - datastart;
hdr.addref();
return hdr;
try
{
hdr.flags = flags;
setSize(hdr, dims, size.p, step.p);
finalizeHdr(hdr);
hdr.u = new_u;
hdr.offset = 0; //data - datastart;
hdr.addref();
return hdr;
}
catch(...)
{
if (u != NULL)
{
CV_XADD(&(u->refcount), -1);
CV_XADD(&(u->urefcount), -1);
}
new_u->currAllocator->deallocate(new_u);
throw;
}
}
void UMat::create(int d, const int* _sizes, int _type, UMatUsageFlags _usageFlags)
@@ -692,18 +705,17 @@ UMat::UMat(const UMat& m, const Rect& roi)
offset += roi.x*esz;
CV_Assert( 0 <= roi.x && 0 <= roi.width && roi.x + roi.width <= m.cols &&
0 <= roi.y && 0 <= roi.height && roi.y + roi.height <= m.rows );
if( u )
CV_XADD(&(u->urefcount), 1);
if( roi.width < m.cols || roi.height < m.rows )
flags |= SUBMATRIX_FLAG;
step[0] = m.step[0]; step[1] = esz;
updateContinuityFlag();
addref();
if( rows <= 0 || cols <= 0 )
{
release();
rows = cols = 0;
release();
}
}
@@ -969,24 +981,29 @@ Mat UMat::getMat(int accessFlags) const
// TODO Support ACCESS_READ (ACCESS_WRITE) without unnecessary data transfers
accessFlags |= ACCESS_RW;
UMatDataAutoLock autolock(u);
if(CV_XADD(&u->refcount, 1) == 0)
u->currAllocator->map(u, accessFlags);
if (u->data != 0)
try
{
Mat hdr(dims, size.p, type(), u->data + offset, step.p);
hdr.flags = flags;
hdr.u = u;
hdr.datastart = u->data;
hdr.data = u->data + offset;
hdr.datalimit = hdr.dataend = u->data + u->size;
return hdr;
if(CV_XADD(&u->refcount, 1) == 0)
u->currAllocator->map(u, accessFlags);
if (u->data != 0)
{
Mat hdr(dims, size.p, type(), u->data + offset, step.p);
hdr.flags = flags;
hdr.u = u;
hdr.datastart = u->data;
hdr.data = u->data + offset;
hdr.datalimit = hdr.dataend = u->data + u->size;
return hdr;
}
}
else
catch(...)
{
CV_XADD(&u->refcount, -1);
CV_Assert(u->data != 0 && "Error mapping of UMat to host memory.");
return Mat();
throw;
}
CV_XADD(&u->refcount, -1);
CV_Assert(u->data != 0 && "Error mapping of UMat to host memory.");
return Mat();
}
void* UMat::handle(int accessFlags) const