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-rw-r--r--src/util.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/src/util.h b/src/util.h
index 96b47057c0..08b23a9d38 100644
--- a/src/util.h
+++ b/src/util.h
@@ -61,4 +61,21 @@
#define VERIFY_CHECK(cond) do { (void)(cond); } while(0)
#endif
+/* Macro for restrict, when available and not in a VERIFY build. */
+#if defined(SECP256K1_BUILD) && defined(VERIFY)
+# define SECP256K1_RESTRICT
+#else
+# if (!defined(__STDC_VERSION__) || (__STDC_VERSION__ < 199901L) )
+# if SECP256K1_GNUC_PREREQ(3,0)
+# define SECP256K1_RESTRICT __restrict__
+# elif (defined(_MSC_VER) && _MSC_VER >= 1400)
+# define SECP256K1_RESTRICT __restrict
+# else
+# define SECP256K1_RESTRICT
+# endif
+# else
+# define SECP256K1_RESTRICT restrict
+# endif
+#endif
+
#endif