1 files changed, 34 insertions, 0 deletions
diff --git a/deps/jemalloc/include/jemalloc/internal/counter.h b/deps/jemalloc/include/jemalloc/internal/counter.h
new file mode 100644
index 000000000..79abf0648
--- /dev/null
+++ b/deps/jemalloc/include/jemalloc/internal/counter.h
@@ -0,0 +1,34 @@
+#ifndef JEMALLOC_INTERNAL_COUNTER_H
+#define JEMALLOC_INTERNAL_COUNTER_H
+
+#include "jemalloc/internal/mutex.h"
+
+typedef struct counter_accum_s {
+	LOCKEDINT_MTX_DECLARE(mtx)
+	locked_u64_t accumbytes;
+	uint64_t interval;
+} counter_accum_t;
+
+JEMALLOC_ALWAYS_INLINE bool
+counter_accum(tsdn_t *tsdn, counter_accum_t *counter, uint64_t bytes) {
+	uint64_t interval = counter->interval;
+	assert(interval > 0);
+	LOCKEDINT_MTX_LOCK(tsdn, counter->mtx);
+	/*
+	 * If the event moves fast enough (and/or if the event handling is slow
+	 * enough), extreme overflow can cause counter trigger coalescing.
+	 * This is an intentional mechanism that avoids rate-limiting
+	 * allocation.
+	 */
+	bool overflow = locked_inc_mod_u64(tsdn, LOCKEDINT_MTX(counter->mtx),
+	    &counter->accumbytes, bytes, interval);
+	LOCKEDINT_MTX_UNLOCK(tsdn, counter->mtx);
+	return overflow;
+}
+
+bool counter_accum_init(counter_accum_t *counter, uint64_t interval);
+void counter_prefork(tsdn_t *tsdn, counter_accum_t *counter);
+void counter_postfork_parent(tsdn_t *tsdn, counter_accum_t *counter);
+void counter_postfork_child(tsdn_t *tsdn, counter_accum_t *counter);
+
+#endif /* JEMALLOC_INTERNAL_COUNTER_H */