1 files changed, 83 insertions, 0 deletions
diff --git a/libglusterfs/src/event-history.c b/libglusterfs/src/event-history.c
new file mode 100644
index 000000000..82baa521a
--- /dev/null
+++ b/libglusterfs/src/event-history.c
@@ -0,0 +1,83 @@
+/*
+  Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com>
+  This file is part of GlusterFS.
+
+  This file is licensed to you under your choice of the GNU Lesser
+  General Public License, version 3 or any later version (LGPLv3 or
+  later), or the GNU General Public License, version 2 (GPLv2), in all
+  cases as published by the Free Software Foundation.
+*/
+
+#include "event-history.h"
+
+eh_t *
+eh_new (size_t buffer_size, gf_boolean_t use_buffer_once,
+        void (*destroy_buffer_data) (void *data))
+{
+        eh_t *history = NULL;
+        buffer_t *buffer = NULL;
+
+        history = GF_CALLOC (1, sizeof (eh_t), gf_common_mt_eh_t);
+        if (!history) {
+                gf_log ("", GF_LOG_ERROR, "allocating history failed.");
+                goto out;
+        }
+
+        buffer = cb_buffer_new (buffer_size, use_buffer_once,
+                                destroy_buffer_data);
+        if (!buffer) {
+                gf_log ("", GF_LOG_ERROR, "allocating circular buffer failed");
+                GF_FREE (history);
+                history = NULL;
+        }
+
+        history->buffer = buffer;
+
+        pthread_mutex_init (&history->lock, NULL);
+out:
+        return history;
+}
+
+void
+eh_dump (eh_t *history, void *data,
+         int (dump_fn) (circular_buffer_t *buffer, void *data))
+{
+        if (!history) {
+                gf_log ("", GF_LOG_DEBUG, "history is NULL");
+                goto out;
+        }
+
+        cb_buffer_dump (history->buffer, data, dump_fn);
+
+out:
+        return;
+}
+
+int
+eh_save_history (eh_t *history, void *data)
+{
+        int   ret = -1;
+
+        ret = cb_add_entry_buffer (history->buffer, data);
+
+        return ret;
+}
+
+int
+eh_destroy (eh_t *history)
+{
+        if (!history) {
+                gf_log ("", GF_LOG_INFO, "history for the xlator is "
+                        "NULL");
+                return -1;
+        }
+
+        cb_buffer_destroy (history->buffer);
+        history->buffer = NULL;
+
+        pthread_mutex_destroy (&history->lock);
+
+        GF_FREE (history);
+
+        return 0;
+}