From eda8d39fd0ee389c53753536c7071c5dbed03ef1 Mon Sep 17 00:00:00 2001
From: Jeffrey Townsend <jeffrey.townsend@bigswitch.com>
Date: Tue, 5 Jan 2016 03:20:36 +0000
Subject: [PATCH] Implement support for the API shared locking implementation.

---
 packages/base/any/onlp/builds/onlp/Makefile   |  3 +
 .../any/onlp/src/onlp/module/src/onlp_locks.c | 55 ++++++++++++++++++-
 2 files changed, 57 insertions(+), 1 deletion(-)

diff --git a/packages/base/any/onlp/builds/onlp/Makefile b/packages/base/any/onlp/builds/onlp/Makefile
index 5637f145..d18020ec 100644
--- a/packages/base/any/onlp/builds/onlp/Makefile
+++ b/packages/base/any/onlp/builds/onlp/Makefile
@@ -48,6 +48,9 @@ include $(BUILDER)/so.mk
 
 GLOBAL_CFLAGS += -DAIM_CONFIG_INCLUDE_CTOR_DTOR=1
 GLOBAL_CFLAGS += -DAIM_CONFIG_INCLUDE_MODULES_INIT=1
+GLOBAL_CFLAGS += -DONLP_CONFIG_API_LOCK_GLOBAL_SHARED=1
+GLOBAL_CFLAGS += -DONLP_CONFIG_INCLUDE_SHLOCK_GLOBAL_INIT=1
+
 GLOBAL_CFLAGS += -fPIC
 GLOBAL_LINK_LIBS += -lpthread $(LIBONLP_PLATFORM) $(LIBONLP_PLATFORM_DEFAULTS)
 
diff --git a/packages/base/any/onlp/src/onlp/module/src/onlp_locks.c b/packages/base/any/onlp/src/onlp/module/src/onlp_locks.c
index c87d894d..7e48c17d 100644
--- a/packages/base/any/onlp/src/onlp/module/src/onlp_locks.c
+++ b/packages/base/any/onlp/src/onlp/module/src/onlp_locks.c
@@ -62,9 +62,62 @@ onlp_api_unlock(void)
 }
 
 #else
-#error GLOBAL_SHARED API Lock support is not yet implemented.
+
+#include <onlplib/shlocks.h>
+
+void
+onlp_api_lock_init(void)
+{
+    onlp_shlock_global_init();
+}
+
+void
+onlp_api_lock(const char* api)
+{
+    onlp_shlock_global_take();
+}
+void
+onlp_api_unlock(void)
+{
+    onlp_shlock_global_give();
+}
+
 #endif
 
+
+/*
+ * This function will perform a sanity test on the API locking implementation.
+ */
+#include <onlplib/file.h>
+
+static int
+onlp_api_lock_test_locked__(void)
+{
+    static int counter__ = 1;
+    int readback = 0;
+    const char* fname = "/tmp/onlp_api_lock_test";
+
+    fclose(fopen(fname, "w"));
+    onlp_file_write_int(counter__, fname, NULL);
+    onlp_file_read_int(&readback, fname, NULL);
+    if(readback != counter__) {
+        fprintf(stderr, "API LOCK TEST: write=%d read=%d", counter__, readback);
+        return -1;
+    }
+    counter__++;
+    return 0;
+}
+ONLP_LOCKED_API0(onlp_api_lock_test);
+
+#else
+
+int
+onlp_api_lock_test(void)
+{
+    fprintf(stderr, "API Locking support not available in this build.\n");
+    return 2;
+}
+
 #endif /* ONLP_CONFIG_INCLUDE_API_LOCK */