Changed shared_ptr to unique_ptr for Priv storage in fluid::View

modules/gapi/include/opencv2/gapi/fluid/gfluidbuffer.hpp

@@ -85,10 +85,13 @@ public:
     Priv& priv();               // internal use only
     const Priv& priv() const;   // internal use only
 
-    View(Priv* p);
+    View(std::unique_ptr<Priv>&& p);
+    View(View&& v);
+    View& operator=(View&& v);
+    ~View();
 
 private:
-    std::shared_ptr<Priv> m_priv;
+    std::unique_ptr<Priv> m_priv;
     const Cache* m_cache;
 };
 
@@ -139,6 +142,7 @@ public:
     inline const GMatDesc& meta() const { return m_cache->m_desc; }
 
     View mkView(int borderSize, bool ownStorage);
+    void addView(const View* v);
 
     class GAPI_EXPORTS Priv;      // internal use only
     Priv& priv();               // internal use only

modules/gapi/include/opencv2/gapi/fluid/gfluidkernel.hpp

@@ -172,7 +172,7 @@ template<> struct fluid_get_in<cv::GMat>
 {
     static const cv::gapi::fluid::View& get(const cv::GArgs &in_args, int idx)
     {
-        return in_args[idx].unsafe_get<cv::gapi::fluid::View>();
+        return *in_args[idx].unsafe_get<cv::gapi::fluid::View*>();
     }
 };
 

modules/gapi/src/backends/fluid/gfluidbackend.cpp

@@ -880,10 +880,10 @@ cv::gimpl::GFluidExecutable::GFluidExecutable(const ade::Graph
                 auto inEdge = GModel::getInEdgeByPort(m_g, agent->op_handle, in_idx);
                 auto ownStorage = fg.metadata(inEdge).get<FluidUseOwnBorderBuffer>().use;
 
-                gapi::fluid::View view = buffer.mkView(fu.border_size, ownStorage);
                 // NB: It is safe to keep ptr as view lifetime is buffer lifetime
-                agent->in_views[in_idx] = view;
-                agent->in_args[in_idx]  = GArg(view);
+                agent->in_views[in_idx] = buffer.mkView(fu.border_size, ownStorage);
+                agent->in_args[in_idx]  = GArg(&agent->in_views[in_idx]);
+                buffer.addView(&agent->in_views[in_idx]);
             }
             else
             {

modules/gapi/src/backends/fluid/gfluidbuffer.cpp

@@ -577,7 +577,7 @@ bool fluid::Buffer::Priv::full() const
     {
         // reset with maximum possible value and then find minimum
         slowest_y = m_desc.size.height;
-        for (const auto &v : m_views) slowest_y = std::min(slowest_y, v.y());
+        for (const auto &v : m_views) slowest_y = std::min(slowest_y, v->y());
     }
 
     return m_write_caret + lpi() - slowest_y > m_storage->rows();
@@ -609,7 +609,7 @@ void fluid::Buffer::Priv::reset()
 int fluid::Buffer::Priv::size() const
 {
     std::size_t view_sz = 0;
-    for (const auto &v : m_views) view_sz += v.priv().size();
+    for (const auto &v : m_views) view_sz += v->priv().size();
 
     auto total = view_sz;
     if (m_storage) total += m_storage->size();
@@ -693,17 +693,24 @@ int fluid::Buffer::lpi() const
     return m_priv->lpi();
 }
 
-fluid::View::View(Priv* p)
-    : m_priv(p), m_cache(&p->cache())
+fluid::View::View(std::unique_ptr<Priv>&& p)
+    : m_priv(std::move(p)), m_cache(&m_priv->cache())
 { /* nothing */ }
 
+fluid::View::View(View&&) = default;
+fluid::View& fluid::View::operator=(View&&) = default;
+fluid::View::~View() = default;
+
 fluid::View fluid::Buffer::mkView(int borderSize, bool ownStorage)
 {
     // FIXME: logic outside of Priv (because View takes pointer to Buffer)
-    auto view = ownStorage ? View(new ViewPrivWithOwnBorder(this, borderSize))
-                           : View(new ViewPrivWithoutOwnBorder(this, borderSize));
-    m_priv->addView(view);
-    return view;
+    return ownStorage ? View(std::unique_ptr<ViewPrivWithOwnBorder>(new ViewPrivWithOwnBorder(this, borderSize)))
+                      : View(std::unique_ptr<ViewPrivWithoutOwnBorder>(new ViewPrivWithoutOwnBorder(this, borderSize)));
+}
+
+void fluid::Buffer::addView(const View* v)
+{
+    m_priv->addView(v);
 }
 
 void fluid::debugBufferPriv(const fluid::Buffer& buffer, std::ostream &os)
@@ -717,7 +724,7 @@ void fluid::debugBufferPriv(const fluid::Buffer& buffer, std::ostream &os)
        <<" (phys " << "[" << p.storage().cols() << " x " <<  p.storage().rows() << "]" << ") :"
        << "  w: " << p.m_write_caret
        << ", r: [";
-    for (const auto &v : p.m_views) { os << &v.priv() << ":" << v.y() << " "; }
+    for (const auto &v : p.m_views) { os << &v->priv() << ":" << v->y() << " "; }
     os << "], avail: " << buffer.linesReady()
        << std::endl;
 }

modules/gapi/src/backends/fluid/gfluidbuffer_priv.hpp

@@ -239,7 +239,7 @@ class GAPI_EXPORTS Buffer::Priv
 
     int m_write_caret      = -1;
 
-    std::vector<View> m_views;
+    std::vector<const View*> m_views;
 
     std::unique_ptr<BufferStorage> m_storage;
 
@@ -265,7 +265,7 @@ public:
     void allocate(BorderOpt border, int border_size, int line_consumption, int skew);
     void bindTo(const cv::gapi::own::Mat &data, bool is_input);
 
-    inline void addView(const View& view) { m_views.push_back(view); }
+    inline void addView(const View* view) { m_views.emplace_back(view); }
 
     inline const GMatDesc& meta() const { return m_desc; }
 

modules/gapi/test/gapi_kernel_tests.cpp

@@ -101,7 +101,7 @@ namespace
         GAPI_FLUID_KERNEL(GClone, I::GClone, false)
         {
             static const int Window = 1;
-            static void run(const cv::gapi::fluid::View&, cv::gapi::fluid::Buffer)
+            static void run(const cv::gapi::fluid::View&, cv::gapi::fluid::Buffer&)
             {
                 HeteroGraph::registerCallKernel(KernelTags::FLUID_CUSTOM_CLONE);
             }