+// Unlike __MINGW64__, __MINGW64_VERSION_MAJOR is defined by MinGW-w64 for both 32 and 64-bit targets.
+#elif defined(__MINGW64_VERSION_MAJOR)
+
+// MinGW-w64 provides intrin.h for both 32 and 64-bit targets.
+#include <intrin.h>
+
+# define BOOST_INTERLOCKED_INCREMENT _InterlockedIncrement
+# define BOOST_INTERLOCKED_DECREMENT _InterlockedDecrement
+# define BOOST_INTERLOCKED_COMPARE_EXCHANGE _InterlockedCompareExchange
+# define BOOST_INTERLOCKED_EXCHANGE _InterlockedExchange
+# define BOOST_INTERLOCKED_EXCHANGE_ADD _InterlockedExchangeAdd
+# if defined(__x86_64__) || defined(__x86_64)
+# define BOOST_INTERLOCKED_COMPARE_EXCHANGE_POINTER _InterlockedCompareExchangePointer
+# define BOOST_INTERLOCKED_EXCHANGE_POINTER _InterlockedExchangePointer
+# else
+# define BOOST_INTERLOCKED_COMPARE_EXCHANGE_POINTER(dest,exchange,compare) \
+ ((void*)BOOST_INTERLOCKED_COMPARE_EXCHANGE((long volatile*)(dest),(long)(exchange),(long)(compare)))
+# define BOOST_INTERLOCKED_EXCHANGE_POINTER(dest,exchange) \
+ ((void*)BOOST_INTERLOCKED_EXCHANGE((long volatile*)(dest),(long)(exchange)))
+# endif
+