1 files changed, 146 insertions, 0 deletions
diff --git a/src/Runtime/Source/foundation/linux/Qt3DSLinuxSemaphore.cpp b/src/Runtime/Source/foundation/linux/Qt3DSLinuxSemaphore.cpp
new file mode 100644
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--- /dev/null
+++ b/src/Runtime/Source/foundation/linux/Qt3DSLinuxSemaphore.cpp
@@ -0,0 +1,146 @@
+/****************************************************************************
+**
+** 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/Qt3DSSemaphore.h"
+#include "foundation/Qt3DSAssert.h"
+#include "foundation/Qt3DSAllocator.h"
+#include "foundation/Qt3DSAllocatorCallback.h"
+
+#include <errno.h>
+#include <stdio.h>
+#include <pthread.h>
+#include <time.h>
+#include <sys/time.h>
+
+namespace qt3ds {
+namespace foundation {
+
+    class SemaphoreImpl
+    {
+    public:
+        SemaphoreImpl(NVAllocatorCallback &alloc)
+            : mAllocator(alloc)
+        {
+        }
+        NVAllocatorCallback &mAllocator;
+        pthread_mutex_t mutex;
+        pthread_cond_t cond;
+        QT3DSU32 count;
+        QT3DSU32 maxCount;
+    };
+
+    struct NVLinuxScopeLock
+    {
+        NVLinuxScopeLock(pthread_mutex_t &m)
+            : mMutex(m)
+        {
+            pthread_mutex_lock(&mMutex);
+        }
+
+        ~NVLinuxScopeLock() { pthread_mutex_unlock(&mMutex); }
+    private:
+        pthread_mutex_t &mMutex;
+    };
+
+    Semaphore::Semaphore(NVAllocatorCallback &alloc, QT3DSU32 initialCount, QT3DSU32 maxCount)
+    {
+        mImpl = QT3DS_NEW(alloc, SemaphoreImpl)(alloc);
+        int status = pthread_mutex_init(&mImpl->mutex, 0);
+        QT3DS_ASSERT(!status);
+        status = pthread_cond_init(&mImpl->cond, 0);
+        QT3DS_ASSERT(!status);
+        mImpl->count = initialCount;
+        mImpl->maxCount = maxCount;
+        QT3DS_ASSERT(initialCount <= maxCount);
+    }
+
+    Semaphore::~Semaphore()
+    {
+        pthread_cond_destroy(&mImpl->cond);
+        pthread_mutex_destroy(&mImpl->mutex);
+        QT3DS_FREE(mImpl->mAllocator, mImpl);
+    }
+
+    bool Semaphore::wait(QT3DSU32 milliseconds)
+    {
+        NVLinuxScopeLock lock(mImpl->mutex);
+
+        if (mImpl->count > 0) {
+            mImpl->count--;
+            return true;
+        }
+
+        if (milliseconds == 0) {
+            return false;
+        }
+
+        if (milliseconds == QT3DSU32(-1)) {
+            int status = pthread_cond_wait(&mImpl->cond, &mImpl->mutex);
+            QT3DS_ASSERT(!status);
+            (void)status;
+        } else {
+            timespec ts;
+            timeval tp;
+            gettimeofday(&tp, NULL);
+            QT3DSU32 sec = milliseconds / 1000;
+            QT3DSU32 usec = (milliseconds - 1000 * sec) * 1000;
+
+            // sschirm: taking into account that us might accumulate to a second
+            // otherwise the pthread_cond_timedwait complains on osx.
+            usec = tp.tv_usec + usec;
+            QT3DSU32 div_sec = usec / 1000000;
+            QT3DSU32 rem_usec = usec - div_sec * 1000000;
+
+            ts.tv_sec = tp.tv_sec + sec + div_sec;
+            ts.tv_nsec = rem_usec * 1000;
+
+            int ierr = pthread_cond_timedwait(&mImpl->cond, &mImpl->mutex, &ts);
+            QT3DS_ASSERT((ierr == 0) || (ierr == ETIMEDOUT));
+            (void)ierr;
+            return false;
+        }
+
+        return true;
+    }
+
+    void Semaphore::post()
+    {
+        NVLinuxScopeLock lock(mImpl->mutex);
+        mImpl->count++;
+        if (mImpl->count > mImpl->maxCount)
+            mImpl->count = mImpl->maxCount;
+        else {
+            pthread_cond_broadcast(&mImpl->cond);
+        }
+    }
+
+} // namespace foundation
+} // namespace qt3ds