1 files changed, 171 insertions, 0 deletions
diff --git a/src/charon-tkm/src/tkm/tkm_chunk_map.c b/src/charon-tkm/src/tkm/tkm_chunk_map.c
new file mode 100644
index 000000000..03ff22836
--- /dev/null
+++ b/src/charon-tkm/src/tkm/tkm_chunk_map.c
@@ -0,0 +1,171 @@
+/*
+ * Copyright (C) 2012 Reto Buerki
+ * Copyright (C) 2012 Adrian-Ken Rueegsegger
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+#include <collections/hashtable.h>
+#include <threading/rwlock.h>
+#include <utils/chunk.h>
+#include <utils/debug.h>
+
+#include "tkm_chunk_map.h"
+
+typedef struct private_tkm_chunk_map_t private_tkm_chunk_map_t;
+
+/**
+ * Private data of tkm chunk map.
+ */
+struct private_tkm_chunk_map_t {
+
+	/**
+	 * public functions
+	 */
+	tkm_chunk_map_t public;
+
+	/**
+	 * Hashtable to store mappings.
+	 */
+	hashtable_t *mappings;
+
+	/**
+	 * rwlock for table.
+	 */
+	rwlock_t *lock;
+
+};
+
+/**
+ * Entry for hashtables
+ */
+typedef struct {
+	/** Key chunk */
+	chunk_t key;
+	/** Entry value */
+	uint64_t value;
+} entry_t;
+
+/**
+ * Destroy a hashtable entry
+ */
+static void entry_destroy(entry_t *this)
+{
+	chunk_free(&this->key);
+	free(this);
+}
+
+METHOD(tkm_chunk_map_t, insert, void,
+	private_tkm_chunk_map_t * const this, const chunk_t * const data,
+	const uint64_t id)
+{
+	entry_t *entry;
+	INIT(entry,
+		.key = chunk_clone(*data),
+		.value = id
+	);
+
+	this->lock->write_lock(this->lock);
+	entry = this->mappings->put(this->mappings, (void*)&entry->key, entry);
+	this->lock->unlock(this->lock);
+
+	if (entry)
+	{
+		entry_destroy(entry);
+	}
+}
+
+METHOD(tkm_chunk_map_t, get_id, uint64_t,
+	private_tkm_chunk_map_t * const this, chunk_t *data)
+{
+	entry_t *entry;
+	this->lock->read_lock(this->lock);
+	entry = this->mappings->get(this->mappings, data);
+	this->lock->unlock(this->lock);
+
+	if (!entry)
+	{
+		return 0;
+	}
+
+	return entry->value;
+}
+
+METHOD(tkm_chunk_map_t, remove_, bool,
+	private_tkm_chunk_map_t * const this, chunk_t *data)
+{
+	entry_t *entry;
+
+	this->lock->write_lock(this->lock);
+	entry = this->mappings->remove(this->mappings, data);
+	this->lock->unlock(this->lock);
+
+	if (entry)
+	{
+		entry_destroy(entry);
+		return TRUE;
+	}
+	else
+	{
+		return FALSE;
+	}
+}
+
+METHOD(tkm_chunk_map_t, destroy, void,
+	private_tkm_chunk_map_t *this)
+{
+	entry_t *entry;
+	enumerator_t *enumerator;
+
+	this->lock->write_lock(this->lock);
+	enumerator = this->mappings->create_enumerator(this->mappings);
+	while (enumerator->enumerate(enumerator, NULL, &entry))
+	{
+		entry_destroy(entry);
+	}
+	enumerator->destroy(enumerator);
+	this->lock->unlock(this->lock);
+
+	this->mappings->destroy(this->mappings);
+	this->lock->destroy(this->lock);
+	free(this);
+}
+
+/**
+ * Hashtable hash function.
+ */
+static u_int hash(chunk_t *key)
+{
+	return chunk_hash(*key);
+}
+
+/*
+ * see header file
+ */
+tkm_chunk_map_t *tkm_chunk_map_create()
+{
+	private_tkm_chunk_map_t *this;
+
+	INIT(this,
+		.public = {
+			.insert = _insert,
+			.get_id = _get_id,
+			.remove = _remove_,
+			.destroy = _destroy,
+		},
+		.lock = rwlock_create(RWLOCK_TYPE_DEFAULT),
+		.mappings = hashtable_create((hashtable_hash_t)hash,
+									 (hashtable_equals_t)chunk_equals_ptr, 32),
+	);
+
+	return &this->public;
+}