Diff: lock.c

Revision:

0:df031b60ca29

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lock.c	Thu Aug 25 15:54:09 2016 +0000
@@ -0,0 +1,91 @@
+/*
+ * libiio - Library for interfacing industrial I/O (IIO) devices
+ *
+ * Copyright (C) 2015 Analog Devices, Inc.
+ * Author: Paul Cercueil <paul.cercueil@analog.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ */
+
+#include "iio-config.h"
+
+#ifdef _WIN32
+#include <windows.h>
+#elif !defined(NO_THREADS)
+#include <pthread.h>
+#endif
+
+#include <stdlib.h>
+
+struct iio_mutex {
+#ifdef NO_THREADS
+	int foo; /* avoid complaints about empty structure */
+#else
+#ifdef _WIN32
+	CRITICAL_SECTION lock;
+#else
+	pthread_mutex_t lock;
+#endif
+#endif
+};
+
+struct iio_mutex * iio_mutex_create(void)
+{
+	struct iio_mutex *lock = malloc(sizeof(*lock));
+
+	if (!lock)
+		return NULL;
+
+#ifndef NO_THREADS
+#ifdef _WIN32
+	InitializeCriticalSection(&lock->lock);
+#else
+	pthread_mutex_init(&lock->lock, NULL);
+#endif
+#endif
+	return lock;
+}
+
+void iio_mutex_destroy(struct iio_mutex *lock)
+{
+#ifndef NO_THREADS
+#ifdef _WIN32
+	DeleteCriticalSection(&lock->lock);
+#else
+	pthread_mutex_destroy(&lock->lock);
+#endif
+#endif
+	free(lock);
+}
+
+void iio_mutex_lock(struct iio_mutex *lock)
+{
+#ifndef NO_THREADS
+#ifdef _WIN32
+	EnterCriticalSection(&lock->lock);
+#else
+	pthread_mutex_lock(&lock->lock);
+#endif
+#endif
+}
+
+void iio_mutex_unlock(struct iio_mutex *lock)
+{
+#ifndef NO_THREADS
+#ifdef _WIN32
+	LeaveCriticalSection(&lock->lock);
+#else
+	pthread_mutex_unlock(&lock->lock);
+#endif
+#endif
+}
+