Threading primitives separated.

1 files changed, 160 insertions, 0 deletions

diff --git a/src/libstrongswan/threading/condvar.c b/src/libstrongswan/threading/condvar.c
new file mode 100644
index 000000000..7ba1c07ec
--- /dev/null
+++ b/src/libstrongswan/threading/condvar.c
@@ -0,0 +1,160 @@
+/*
+ * Copyright (C) 2008-2009 Tobias Brunner
+ * Copyright (C) 2008 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.
+ */
+
+#define _GNU_SOURCE
+#include <pthread.h>
+#include <stdint.h>
+#include <time.h>
+#include <errno.h>
+
+#include <threading.h>
+#include <library.h>
+#include <debug.h>
+
+#include "condvar.h"
+#include "mutex.h"
+
+/**
+ * Implementation of condvar_t.wait.
+ */
+static void _wait(private_condvar_t *this, private_mutex_t *mutex)
+{
+	if (mutex->recursive)
+	{
+		private_r_mutex_t* recursive = (private_r_mutex_t*)mutex;
+
+		/* mutex owner gets cleared during condvar wait */
+		recursive->thread = 0;
+		pthread_cond_wait(&this->condvar, &mutex->mutex);
+		recursive->thread = pthread_self();
+	}
+	else
+	{
+		pthread_cond_wait(&this->condvar, &mutex->mutex);
+	}
+}
+
+/**
+ * Implementation of condvar_t.timed_wait_abs.
+ */
+static bool timed_wait_abs(private_condvar_t *this, private_mutex_t *mutex,
+						   timeval_t time)
+{
+	struct timespec ts;
+	bool timed_out;
+
+	ts.tv_sec = time.tv_sec;
+	ts.tv_nsec = time.tv_usec * 1000;
+
+	if (mutex->recursive)
+	{
+		private_r_mutex_t* recursive = (private_r_mutex_t*)mutex;
+
+		recursive->thread = 0;
+		timed_out = pthread_cond_timedwait(&this->condvar, &mutex->mutex,
+										   &ts) == ETIMEDOUT;
+		recursive->thread = pthread_self();
+	}
+	else
+	{
+		timed_out = pthread_cond_timedwait(&this->condvar, &mutex->mutex,
+										   &ts) == ETIMEDOUT;
+	}
+	return timed_out;
+}
+
+/**
+ * Implementation of condvar_t.timed_wait.
+ */
+static bool timed_wait(private_condvar_t *this, private_mutex_t *mutex,
+					   u_int timeout)
+{
+	timeval_t tv;
+	u_int s, ms;
+
+	time_monotonic(&tv);
+
+	s = timeout / 1000;
+	ms = timeout % 1000;
+
+	tv.tv_sec += s;
+	tv.tv_usec += ms * 1000;
+
+	if (tv.tv_usec > 1000000 /* 1s */)
+	{
+		tv.tv_usec -= 1000000;
+		tv.tv_sec++;
+	}
+	return timed_wait_abs(this, mutex, tv);
+}
+
+/**
+ * Implementation of condvar_t.signal.
+ */
+static void _signal(private_condvar_t *this)
+{
+	pthread_cond_signal(&this->condvar);
+}
+
+/**
+ * Implementation of condvar_t.broadcast.
+ */
+static void broadcast(private_condvar_t *this)
+{
+	pthread_cond_broadcast(&this->condvar);
+}
+
+/**
+ * Implementation of condvar_t.destroy
+ */
+static void condvar_destroy(private_condvar_t *this)
+{
+	pthread_cond_destroy(&this->condvar);
+	free(this);
+}
+
+/*
+ * see header file
+ */
+condvar_t *condvar_create(condvar_type_t type)
+{
+	switch (type)
+	{
+		case CONDVAR_TYPE_DEFAULT:
+		default:
+		{
+			pthread_condattr_t condattr;
+			private_condvar_t *this = malloc_thing(private_condvar_t);
+
+			this->public.wait = (void(*)(condvar_t*, mutex_t *mutex))_wait;
+			this->public.timed_wait = (bool(*)(condvar_t*, mutex_t *mutex, u_int timeout))timed_wait;
+			this->public.timed_wait_abs = (bool(*)(condvar_t*, mutex_t *mutex, timeval_t time))timed_wait_abs;
+			this->public.signal = (void(*)(condvar_t*))_signal;
+			this->public.broadcast = (void(*)(condvar_t*))broadcast;
+			this->public.destroy = (void(*)(condvar_t*))condvar_destroy;
+
+			pthread_condattr_init(&condattr);
+#ifdef HAVE_CONDATTR_CLOCK_MONOTONIC
+			pthread_condattr_setclock(&condattr, CLOCK_MONOTONIC);
+#endif
+			pthread_cond_init(&this->condvar, &condattr);
+			pthread_condattr_destroy(&condattr);
+
+			return &this->public;
+		}
+	}
+}
+