Cleanup headers

[urcu.git] / README

diff --git a/README b/README
index b47fe48c2c181e833c633c8b6b973ddcbf0f5186..e5c04b179cae49d202a49809d09a76f714ada711 100644 (file)
--- a/README
+++ b/README
@@ -70,6 +70,15 @@ Writing
        After, synchronize_rcu() must be called. When it returns, the old
        values are not in usage anymore.
 
+Usage of liburcu-defer
+
+       * #include <urcu-defer.h>
+       * Link with "-lurcu-defer"
+       * Provides call_rcu() primitive to enqueue delayed callbacks. Queued
+         callbacks are executed in batch periodically after a grace period.
+         Do _not_ use call_rcu() within a read-side critical section, because
+         it may call synchronize_rcu() if the thread queue is full.
+
 Being careful with signals
 
        The liburcu library uses signals internally. The signal handler is