""

Source/charon/thread_pool.c

@@ -0,0 +1,129 @@
+/**
+ * @file worker.c
+ * 
+ * @brief worker thread, gets jobs form job_queue
+ * 
+ */
+
+/*
+ * Copyright (C) 2005 Jan Hutter, Martin Willi
+ * 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 "thread_pool.h"
+
+#include <stdlib.h>
+#include <freeswan.h>
+#include <pluto/constants.h>
+#include <pluto/defs.h>
+
+#include <pthread.h>
+
+/**
+ * structure with private members for thread_pool
+ */
+typedef struct {
+	/**
+	 * inclusion of public members
+	 */
+	thread_pool_t public;
+	/**
+	 * number of running threads
+	 */
+	 size_t pool_size;
+	/**
+	 * array of thread ids
+	 */
+	pthread_t *threads;
+} private_thread_pool_t;
+
+
+
+
+void *job_processing(private_thread_pool_t *this)
+{
+	for (;;) {
+		
+		sleep(1);
+		
+		/* flag for termination received ? */
+		pthread_testcancel();
+	}
+}
+
+/**
+ * Implementation of thread_pool_t.get_pool_size
+ */
+static status_t get_pool_size(private_thread_pool_t *this, size_t *size)
+{
+	*size = this->pool_size;
+	return SUCCESS;
+}
+
+/**
+ * Implementation of thread_pool_t.destroy
+ */
+static status_t destroy(private_thread_pool_t *this)
+{	
+	int current;
+	
+	/* flag thread for termination */
+	for (current = 0; current < this->pool_size; current++) {
+		pthread_cancel(this->threads[current]);
+	}	
+	
+	/* wait for all threads */
+	for (current = 0; current < this->pool_size; current++) {
+		pthread_join(this->threads[current], NULL);
+	}	
+
+	/* free mem */
+	pfree(this->threads);
+	pfree(this);
+	return SUCCESS;
+}
+
+/**
+ * Implementation of default constructor for thread_pool_t
+ */
+thread_pool_t *thread_pool_create(size_t pool_size)
+{
+	int current;
+	
+	private_thread_pool_t *this = alloc_thing(private_thread_pool_t, "private_thread_pool_t");
+	
+	/* fill in public fields */
+	this->public.destroy = (status_t(*)(thread_pool_t*))destroy;
+	this->public.get_pool_size = (status_t(*)(thread_pool_t*, size_t*))get_pool_size;
+	
+	this->pool_size = pool_size;
+	this->threads = alloc_bytes(sizeof(pthread_t) * pool_size, "pthread_t[] of private_thread_pool_t");
+	
+	/* try to create as many threads as possible, up tu pool_size */
+	for (current = 0; current < pool_size; current++) {
+		if (pthread_create(&(this->threads[current]), NULL, (void*(*)(void*))job_processing, this)) {
+			/* did we get any? */
+			if (current == 0) {
+				pfree(this->threads);
+				pfree(this);
+				return NULL;
+			}
+			/* not all threads could be created, but at least one :-/ */
+			this->pool_size = current;
+			return (thread_pool_t*)this;
+		}
+	}	
+	
+	return (thread_pool_t*)this;
+}

Source/charon/thread_pool.h

@@ -0,0 +1,63 @@
+/**
+ * @file worker.h
+ * 
+ * @brief worker thread, gets jobs form job_queue
+ * 
+ */
+
+/*
+ * Copyright (C) 2005 Jan Hutter, Martin Willi
+ * 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.
+ */
+
+#ifndef THREAD_POOL_H_
+#define THREAD_POOL_H_
+
+#include <stdlib.h>
+
+#include "types.h"
+
+/**
+ * A thread_pool contains a pool of threads processing the job queue
+ */
+typedef struct thread_pool_s thread_pool_t;
+
+struct thread_pool_s {
+	/**
+	 * Stops process after processing current job
+	 * 
+	 * @param thread_pool	thread_pool_t object
+	 * @param size [out]	size of pool				
+	 * @return				SUCCESS		Thread flagged for termination
+	 */
+	status_t (*get_pool_size) (thread_pool_t *thread_pool, size_t *pool_size);
+	/**
+	 * Destroy pool, blocks until threads cleanly terminated
+	 * 
+	 * @param thread_pool	thread_pool_t object
+	 * @return				SUCCESS
+	 */
+	status_t (*destroy) (thread_pool_t *thread_pool);
+};
+
+/**
+ * @brief Create the thread pool using using pool_size of threads
+ * 
+ * @param			pool_size	desired pool size
+ * @return 			NULL		when no thread could be created
+ * 					thread_pool	when one ore more threads could be created
+ */
+thread_pool_t *thread_pool_create(size_t pool_size);
+
+
+#endif /*THREAD_POOL_H_*/