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-rw-r--r--libguile/whippet/src/spin.h18
1 files changed, 18 insertions, 0 deletions
diff --git a/libguile/whippet/src/spin.h b/libguile/whippet/src/spin.h
new file mode 100644
index 000000000..d650c3216
--- /dev/null
+++ b/libguile/whippet/src/spin.h
@@ -0,0 +1,18 @@
+#ifndef SPIN_H
+#define SPIN_H
+
+#include <sched.h>
+#include <unistd.h>
+
+static inline void yield_for_spin(size_t spin_count) {
+ if (spin_count < 10)
+ __builtin_ia32_pause();
+ else if (spin_count < 20)
+ sched_yield();
+ else if (spin_count < 40)
+ usleep(0);
+ else
+ usleep(1);
+}
+
+#endif // SPIN_H