Adding an object-oriented wrapper for thread-specific values.

2 files changed, 146 insertions, 0 deletions

diff --git a/src/libstrongswan/threading/thread_value.c b/src/libstrongswan/threading/thread_value.c
new file mode 100644
index 000000000..8f2a8846c
--- /dev/null
+++ b/src/libstrongswan/threading/thread_value.c
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2009 Tobias Brunner
+ * 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.
+ */
+
+#define _GNU_SOURCE
+#include <pthread.h>
+
+#include <library.h>
+
+#include "thread_value.h"
+
+typedef struct private_thread_value_t private_thread_value_t;
+
+struct private_thread_value_t {
+	/**
+	 * Public interface.
+	 */
+	thread_value_t public;
+
+	/**
+	 * Key to access thread-specific values.
+	 */
+	pthread_key_t key;
+
+};
+
+
+/**
+ * Implementation of thread_value_t.set.
+ */
+static void set(private_thread_value_t *this, void *val)
+{
+	pthread_setspecific(this->key, val);
+}
+
+/**
+ * Implementation of thread_value_t.get.
+ */
+static void *get(private_thread_value_t *this)
+{
+	return pthread_getspecific(this->key);
+}
+
+/**
+ * Implementation of thread_value_t.destroy.
+ */
+static void destroy(private_thread_value_t *this)
+{
+	pthread_key_delete(this->key);
+	free(this);
+}
+
+
+/**
+ * Described in header.
+ */
+thread_value_t *thread_value_create(thread_cleanup_t destructor)
+{
+	private_thread_value_t *this = malloc_thing(private_thread_value_t);
+	this->public.set = (void(*)(thread_value_t*,void*))set;
+	this->public.get = (void*(*)(thread_value_t*))get;
+	this->public.destroy = (void(*)(thread_value_t*))destroy;
+
+	pthread_key_create(&this->key, destructor);
+	return &this->public;
+}
+
diff --git a/src/libstrongswan/threading/thread_value.h b/src/libstrongswan/threading/thread_value.h
new file mode 100644
index 000000000..48f5f7d6b
--- /dev/null
+++ b/src/libstrongswan/threading/thread_value.h
@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2009 Tobias Brunner
+ * 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.
+ */
+
+/**
+ * @defgroup thread_value thread_value
+ * @{ @ingroup threading
+ */
+
+#ifndef THREADING_THREAD_VALUE_H_
+#define THREADING_THREAD_VALUE_H_
+
+#include <threading/thread.h>
+
+typedef struct thread_value_t thread_value_t;
+
+/**
+ * Wrapper for thread-specific values.
+ */
+struct thread_value_t {
+
+	/**
+	 * Set a thread-specific value.
+	 *
+	 * @param val		thread specific value
+	 */
+	void (*set)(thread_value_t *this, void *val);
+
+	/**
+	 * Get a thread-specific value.
+	 *
+	 * @return			the value specific to the current thread
+	 */
+	void *(*get)(thread_value_t *this);
+
+	/**
+	 * Destroys this thread specific value wrapper. There is no check for
+	 * non-NULL values which are currently assigned to the calling thread, no
+	 * destructor is called.
+	 */
+	void (*destroy)(thread_value_t *this);
+
+};
+
+/**
+ * Create a new thread-specific value wrapper.
+ *
+ * The optional destructor is called whenever a thread terminates, with the
+ * assigned value as argument. It is not called if that value is NULL.
+ *
+ * @param destructor	destructor
+ * @return				thread-specific value wrapper
+ */
+thread_value_t *thread_value_create(thread_cleanup_t destructor);
+
+#endif /** THREADING_THREAD_VALUE_H_ @} */
+