Handle overflow write

LibSnugLog/include/disruptor.h

@@ -97,7 +97,7 @@ public:
 		
 		// Check if we jumped the fence
 		if(fence_v <= new_offset && fence_v > old_offset) {
-			return std::nullopt;
+			goto handle_fence;
 		}
 		
 		// Check if we jumped the fence while overflowing
@@ -108,9 +108,25 @@ public:
 				new_offset %= max_offset;
 			}
 			if(fence_v <= new_offset) {
+				goto handle_fence;
+			}
+		}
+		
+		goto handle_fence_end;
+		handle_fence:
+		if constexpr (OverflowStrategy::on_overflow == overflow_response_t::must_wait) {
+			return std::nullopt;
+		} else if constexpr (OverflowStrategy::on_overflow == overflow_response_t::must_overflow) {
+			if(!fence.compare_exchange_weak(fence_v, new_offset, std::memory_order_release, std::memory_order_relaxed)) {
 				return std::nullopt;
 			}
+		} else {
+			static_assert(
+				OverflowStrategy::on_overflow == overflow_response_t::must_wait
+				|| OverflowStrategy::on_overflow == overflow_response_t::must_overflow
+			);
 		}
+		handle_fence_end:
 		
 		if(!lead.compare_exchange_weak(old_offset, new_offset, std::memory_order_acquire, std::memory_order_relaxed)) {
 			return std::nullopt;