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Update matrix.cpp

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Fix race condition in getDefaultAllocator and setDefaultAllocator interaction / not threadsafe currently
This commit is contained in:
Matthias Grundmann 2017-05-10 16:04:02 -07:00 committed by Alexander Alekhin
parent d72ddc8255
commit cf4e9e5ce2
1 changed files with 6 additions and 2 deletions
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6
modules/core/src/matrix.cpp
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@ -222,16 +222,20 @@ public:
}; };
namespace namespace
{ {
MatAllocator* g_matAllocator = NULL; MatAllocator* volatile g_matAllocator = NULL;
} }
MatAllocator* Mat::getDefaultAllocator() MatAllocator* Mat::getDefaultAllocator()
{ {
if (g_matAllocator == NULL)
{
cv::AutoLock lock(cv::getInitializationMutex());
if (g_matAllocator == NULL) if (g_matAllocator == NULL)
{ {
g_matAllocator = getStdAllocator(); g_matAllocator = getStdAllocator();
} }
}
return g_matAllocator; return g_matAllocator;
} }
void Mat::setDefaultAllocator(MatAllocator* allocator) void Mat::setDefaultAllocator(MatAllocator* allocator)