From 6d962b38e993129b61dd373ec8c8e663b232f1c2 Mon Sep 17 00:00:00 2001
From: Michal Mielewczyk <michal.mielewczyk@intel.com>
Date: Thu, 14 Jan 2021 23:48:08 -0500
Subject: [PATCH] API for cacheline write trylock

Signed-off-by: Michal Mielewczyk <michal.mielewczyk@intel.com>
---
 src/concurrency/ocf_cache_line_concurrency.c | 14 ++++++++++++++
 src/concurrency/ocf_cache_line_concurrency.h | 19 +++++++++++++++++++
 2 files changed, 33 insertions(+)

diff --git a/src/concurrency/ocf_cache_line_concurrency.c b/src/concurrency/ocf_cache_line_concurrency.c
index 465d76f..cbe0833 100644
--- a/src/concurrency/ocf_cache_line_concurrency.c
+++ b/src/concurrency/ocf_cache_line_concurrency.c
@@ -1157,3 +1157,17 @@ void ocf_cache_line_unlock_rd(struct ocf_cache *cache, ocf_cache_line_t line)
 	__unlock_cache_line_rd(c, line);
 }
 
+bool ocf_cache_line_try_lock_wr(struct ocf_cache *cache, ocf_cache_line_t line)
+{
+	struct ocf_cache_line_concurrency *c = cache->device->concurrency.cache_line;
+	return __lock_cache_line_wr(c, line, NULL, NULL, 0);
+}
+
+void ocf_cache_line_unlock_wr(struct ocf_cache *cache, ocf_cache_line_t line)
+{
+	struct ocf_cache_line_concurrency *c = cache->device->concurrency.cache_line;
+
+	OCF_DEBUG_RQ(cache, "Cache line = %u", line);
+
+	__unlock_cache_line_wr(c, line);
+}
diff --git a/src/concurrency/ocf_cache_line_concurrency.h b/src/concurrency/ocf_cache_line_concurrency.h
index c49a803..c42c170 100644
--- a/src/concurrency/ocf_cache_line_concurrency.h
+++ b/src/concurrency/ocf_cache_line_concurrency.h
@@ -161,4 +161,23 @@ void ocf_cache_line_unlock_rd(struct ocf_cache *cache, ocf_cache_line_t line);
  */
 bool ocf_cache_line_try_lock_rd(struct ocf_cache *cache, ocf_cache_line_t line);
 
+/**
+ * @brief Release cache line write lock
+ *
+ * @param cache - OCF cache instance
+ * @param line - Cache line to be unlocked
+ */
+void ocf_cache_line_unlock_wr(struct ocf_cache *cache, ocf_cache_line_t line);
+
+/**
+ * @brief Attempt to lock cache line for write
+ *
+ * @param cache - OCF cache instance
+ * @param line - Cache line to be checked for waiters
+ *
+ * @retval true - write lock successfully acquired
+ * @retval false - failed to acquire write lock
+ */
+bool ocf_cache_line_try_lock_wr(struct ocf_cache *cache, ocf_cache_line_t line);
+
 #endif /* OCF_CONCURRENCY_H_ */