shaderinput.cc

Go to the documentation of this file.

#include "ion/gfx/shaderinput.h"
#include <limits>

namespace ion {
namespace gfx {

uint64 ShaderInputBase::GetNewStamp() {
  static std::atomic<uint32> s_stamp1_counter(1U);
  static std::atomic<uint32> s_stamp2_counter(0U);

  uint64 stamp_loworder = s_stamp1_counter++;  // Post-increment
  uint64 stamp_highorder;
  if (stamp_loworder == std::numeric_limits<uint32>::max()) {
    stamp_highorder = s_stamp2_counter++;
  } else {
    stamp_highorder = s_stamp2_counter;
  }
  return stamp_loworder | (stamp_highorder << 32);
}

}  // namespace gfx
}  // namespace ion