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Resolves a GCC-troubling circular declaration issue vs. atomic.h.

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Thomas Harte 2019-01-25 19:30:39 -05:00 committed by Thomas Harte
parent 312f38906b
commit 6a43fc5df0
1 changed files with 4 additions and 0 deletions
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4
Outputs/OpenGL/ScanTarget.hpp
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@ -75,6 +75,10 @@ class ScanTarget: public Outputs::Display::ScanTarget {
}; };
struct PointerSet { struct PointerSet {
// This constructor is here to appease GCC's interpretation of
// an ambiguity in the C++ standard; cf. https://stackoverflow.com/questions/17430377
PointerSet() {}
// The sizes below might be less hassle as something more natural like ints, // The sizes below might be less hassle as something more natural like ints,
// but squeezing this struct into 64 bits makes the std::atomics more likely // but squeezing this struct into 64 bits makes the std::atomics more likely
// to be lock free; they are under LLVM x86-64. // to be lock free; they are under LLVM x86-64.