1 files changed, 120 insertions, 0 deletions
diff --git a/src/foundation/linux/Qt3DSLinuxMutex.cpp b/src/foundation/linux/Qt3DSLinuxMutex.cpp
new file mode 100644
index 0000000..bbc5582
--- /dev/null
+++ b/src/foundation/linux/Qt3DSLinuxMutex.cpp
@@ -0,0 +1,120 @@
+/****************************************************************************
+**
+** Copyright (C) 2008-2012 NVIDIA Corporation.
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt 3D Studio.
+**
+** $QT_BEGIN_LICENSE:GPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 or (at your option) any later version
+** approved by the KDE Free Qt Foundation. The licenses are as published by
+** the Free Software Foundation and appearing in the file LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "foundation/Qt3DS.h"
+#include "foundation/Qt3DSMutex.h"
+#include "foundation/Qt3DSAssert.h"
+#include "foundation/Qt3DSAtomic.h"
+
+#include <pthread.h>
+
+namespace qt3ds {
+namespace foundation {
+
+    namespace {
+        pthread_mutex_t *getMutex(MutexImpl *impl)
+        {
+            return reinterpret_cast<pthread_mutex_t *>(impl);
+        }
+    }
+
+    MutexImpl::MutexImpl()
+    {
+        pthread_mutexattr_t attr;
+        pthread_mutexattr_init(&attr);
+        pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
+        pthread_mutex_init(getMutex(this), &attr);
+        pthread_mutexattr_destroy(&attr);
+    }
+
+    MutexImpl::~MutexImpl() { pthread_mutex_destroy(getMutex(this)); }
+
+    bool MutexImpl::lock() { return !pthread_mutex_lock(getMutex(this)); }
+
+    bool MutexImpl::trylock() { return !pthread_mutex_trylock(getMutex(this)); }
+
+    bool MutexImpl::unlock() { return !pthread_mutex_unlock(getMutex(this)); }
+
+    const QT3DSU32 MutexImpl::size = sizeof(pthread_mutex_t);
+
+    class ReadWriteLockImpl
+    {
+    public:
+        ReadWriteLockImpl(NVAllocatorCallback &alloc)
+            : mAllocator(alloc)
+        {
+        }
+        NVAllocatorCallback &mAllocator;
+        pthread_mutex_t mutex;
+        volatile int readerCounter;
+    };
+
+    ReadWriteLock::ReadWriteLock(NVAllocatorCallback &alloc)
+    {
+        mImpl = QT3DS_NEW(alloc, ReadWriteLockImpl)(alloc);
+
+        pthread_mutexattr_t attr;
+        pthread_mutexattr_init(&attr);
+        pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
+        pthread_mutex_init(&mImpl->mutex, &attr);
+        pthread_mutexattr_destroy(&attr);
+
+        mImpl->readerCounter = 0;
+    }
+
+    ReadWriteLock::~ReadWriteLock()
+    {
+        pthread_mutex_destroy(&mImpl->mutex);
+        QT3DS_FREE(mImpl->mAllocator, mImpl);
+    }
+
+    void ReadWriteLock::lockReader()
+    {
+        pthread_mutex_lock(&mImpl->mutex);
+
+        atomicIncrement(&mImpl->readerCounter);
+
+        pthread_mutex_unlock(&mImpl->mutex);
+    }
+
+    void ReadWriteLock::lockWriter()
+    {
+        pthread_mutex_lock(&mImpl->mutex);
+
+        while (mImpl->readerCounter != 0)
+            ;
+    }
+
+    void ReadWriteLock::unlockReader() { atomicDecrement(&mImpl->readerCounter); }
+
+    void ReadWriteLock::unlockWriter() { pthread_mutex_unlock(&mImpl->mutex); }
+
+} // namespace foundation
+} // namespace qt3ds