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-rw-r--r--erts/include/internal/erl_misc_utils.h29
1 files changed, 29 insertions, 0 deletions
diff --git a/erts/include/internal/erl_misc_utils.h b/erts/include/internal/erl_misc_utils.h
index a4a5d1d510..55566ddf74 100644
--- a/erts/include/internal/erl_misc_utils.h
+++ b/erts/include/internal/erl_misc_utils.h
@@ -56,4 +56,33 @@ int erts_map_win_error_to_errno(DWORD win_error);
int erts_get_last_win_errno(void);
#endif
+#if defined(__APPLE__) && defined(__MACH__) && !defined(__DARWIN__)
+#define __DARWIN__ 1
+#endif
+
+/*
+ * ERTS_PREMATURE_TIMEOUT() expects time units
+ * 1000 (millisec), 1000000 (microsec), or
+ * 1000000000 (nanosec). Might not work properly
+ * otherwise.
+ */
+#undef ERTS_USE_PREMATURE_TIMEOUT
+#undef ERTS_PREMATURE_TIMEOUT
+
+#if defined(__DARWIN__)
+#define ERTS_USE_PREMATURE_TIMEOUT 1
+#define ERTS_PREMATURE_TIMEOUT(TMO, TU) \
+ ((TMO) >= 1 * ((TU) / 1000) \
+ ? ((TMO) >= 20 * ((TU) / 1000) \
+ ? 15 * ((TU) / 1000) \
+ : ((TMO) >= 5 * ((TU) / 1000) \
+ ? 3 * ((TU) / 1000) \
+ : 5 * ((TU) / 10000))) \
+ : 0)
+
+#else
+#define ERTS_USE_PREMATURE_TIMEOUT 0
+#define ERTS_PREMATURE_TIMEOUT(TMO, TU) (0)
+#endif
+
#endif /* #ifndef ERL_MISC_UTILS_H_ */