Do constructors for a struct that will be used in amp code need to have restrict(amp) included? Ex:
struct Foo { inline Foo(void) { } float a; }; Or should it be like...
struct Foo { inline Foo(void) restrict(amp) { } float a; }; 
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1 Answer
Yes. If you want to construct those objects within an AMP kernel. In the example below stuff instances are created on within the amp restricted parallel_for_each. The constructor needs to be marked as restrict(amp) in order to compile correctly.
class stuff { public: int a; stuff(int v) restrict(amp, cpu) : a(v) { } }; class test_case { public: test_case() { } void test_amp() { concurrency::array_view<stuff, 1> data(100); concurrency::parallel_for_each(data.extent, [data](concurrency::index<1> idx) restrict(amp) { data[idx] = stuff(s.a * s.a); }); data.synchronize(); }; }; I also wrote this up as a blog post, Using C++ Classes with C++ AMP.