Imported Upstream version 5.2.0

1 files changed, 196 insertions, 0 deletions

diff --git a/src/libstrongswan/threading/windows/mutex.c b/src/libstrongswan/threading/windows/mutex.c
new file mode 100644
index 000000000..a26889580
--- /dev/null
+++ b/src/libstrongswan/threading/windows/mutex.c
@@ -0,0 +1,196 @@
+/*
+ * Copyright (C) 2013 Martin Willi
+ * Copyright (C) 2013 revosec AG
+ *
+ * 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.h"
+
+#include <utils/debug.h>
+#include <threading/mutex.h>
+#include <threading/condvar.h>
+
+typedef struct private_mutex_t private_mutex_t;
+typedef struct private_condvar_t private_condvar_t;
+
+/**
+ * private data of mutex
+ */
+struct private_mutex_t {
+
+	/**
+	 * public functions
+	 */
+	mutex_t public;
+
+	/**
+	 * wrapped critical section
+	 */
+	CRITICAL_SECTION cs;
+
+	/**
+	 * Recursive lock count
+	 */
+	u_int times;
+};
+
+/**
+ * private data of condvar
+ */
+struct private_condvar_t {
+
+	/**
+	 * public functions
+	 */
+	condvar_t public;
+
+	/**
+	 * wrapped condition variable
+	 */
+	CONDITION_VARIABLE cv;
+};
+
+
+METHOD(mutex_t, lock, void,
+	private_mutex_t *this)
+{
+	EnterCriticalSection(&this->cs);
+	this->times++;
+}
+
+METHOD(mutex_t, unlock, void,
+	private_mutex_t *this)
+{
+	this->times--;
+	LeaveCriticalSection(&this->cs);
+}
+
+METHOD(mutex_t, mutex_destroy, void,
+	private_mutex_t *this)
+{
+	DeleteCriticalSection(&this->cs);
+	free(this);
+}
+
+/*
+ * see header file
+ */
+mutex_t *mutex_create(mutex_type_t type)
+{
+	private_mutex_t *this;
+
+	INIT(this,
+		.public = {
+			.lock = _lock,
+			.unlock = _unlock,
+			.destroy = _mutex_destroy,
+		},
+	);
+
+	/* CriticalSections are recursive, we use it for all mutex types. */
+	InitializeCriticalSection(&this->cs);
+
+	return &this->public;
+}
+
+METHOD(condvar_t, timed_wait, bool,
+	private_condvar_t *this, mutex_t *pubmutex, u_int timeout)
+{
+	private_mutex_t *mutex = (private_mutex_t*)pubmutex;
+	u_int times;
+	bool ret;
+
+	thread_set_active_condvar(&this->cv);
+
+	/* while a CriticalSection is recursive, waiting in a condvar releases
+	 * only one mutex. So release (and reaquire) all locks except the last. */
+	times = mutex->times;
+	while (mutex->times-- > 1)
+	{
+		LeaveCriticalSection(&mutex->cs);
+	}
+
+	ret = SleepConditionVariableCS(&this->cv, &mutex->cs, timeout);
+
+	while (++mutex->times < times)
+	{
+		EnterCriticalSection(&mutex->cs);
+	}
+
+	thread_set_active_condvar(NULL);
+
+	return ret == 0;
+}
+
+METHOD(condvar_t, wait_, void,
+	private_condvar_t *this, mutex_t *mutex)
+{
+	timed_wait(this, mutex, INFINITE);
+}
+
+METHOD(condvar_t, timed_wait_abs, bool,
+	private_condvar_t *this, mutex_t *mutex, timeval_t tv)
+{
+	DWORD timeout;
+	timeval_t now, diff;
+
+	time_monotonic(&now);
+	if (timercmp(&now, &tv, >))
+	{
+		return TRUE;
+	}
+	timersub(&tv, &now, &diff);
+	timeout = diff.tv_sec * 1000 + diff.tv_usec / 1000;
+
+	return timed_wait(this, mutex, timeout);
+}
+
+METHOD(condvar_t, signal_, void,
+	private_condvar_t *this)
+{
+	WakeConditionVariable(&this->cv);
+}
+
+METHOD(condvar_t, broadcast, void,
+	private_condvar_t *this)
+{
+	WakeAllConditionVariable(&this->cv);
+}
+
+METHOD(condvar_t, condvar_destroy, void,
+	private_condvar_t *this)
+{
+	free(this);
+}
+
+/*
+ * see header file
+ */
+condvar_t *condvar_create(condvar_type_t type)
+{
+	private_condvar_t *this;
+
+	INIT(this,
+		.public = {
+			.wait = _wait_,
+			.timed_wait = _timed_wait,
+			.timed_wait_abs = _timed_wait_abs,
+			.signal = _signal_,
+			.broadcast = _broadcast,
+			.destroy = _condvar_destroy,
+		}
+	);
+
+	InitializeConditionVariable(&this->cv);
+
+	return &this->public;
+}