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-rw-r--r--src/libstrongswan/threading/rwlock.h36
1 files changed, 36 insertions, 0 deletions
diff --git a/src/libstrongswan/threading/rwlock.h b/src/libstrongswan/threading/rwlock.h
index 2f681b781..2f4330ffb 100644
--- a/src/libstrongswan/threading/rwlock.h
+++ b/src/libstrongswan/threading/rwlock.h
@@ -31,11 +31,47 @@ struct private_rwlock_t {
*/
rwlock_t public;
+#ifdef HAVE_PTHREAD_RWLOCK_INIT
+
/**
* wrapped pthread rwlock
*/
pthread_rwlock_t rwlock;
+#else
+
+ /**
+ * mutex to emulate a native rwlock
+ */
+ mutex_t *mutex;
+
+ /**
+ * condvar to handle writers
+ */
+ condvar_t *writers;
+
+ /**
+ * condvar to handle readers
+ */
+ condvar_t *readers;
+
+ /**
+ * number of waiting writers
+ */
+ u_int waiting_writers;
+
+ /**
+ * number of readers holding the lock
+ */
+ u_int reader_count;
+
+ /**
+ * current writer thread, if any
+ */
+ pthread_t writer;
+
+#endif /* HAVE_PTHREAD_RWLOCK_INIT */
+
/**
* profiling info, if enabled
*/