80 lines
2.3 KiB
C++
80 lines
2.3 KiB
C++
/* Copyright 2019 The TensorFlow Authors. All Rights Reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==============================================================================*/
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#ifndef TENSORFLOW_LITE_DELEGATES_GPU_CL_EGL_SYNC_H_
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#define TENSORFLOW_LITE_DELEGATES_GPU_CL_EGL_SYNC_H_
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#include <EGL/egl.h>
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#include <EGL/eglext.h>
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#include "tensorflow/lite/delegates/gpu/common/status.h"
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namespace tflite {
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namespace gpu {
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namespace cl {
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// RAII wrapper for EGL sync object.
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// EglSync is moveable but not copyable.
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class EglSync {
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public:
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// Creates a fence in OpenGL command stream. This sync is enqueued and *not*
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// flushed.
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//
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// Depends on EGL_KHR_fence_sync extension.
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static absl::Status NewFence(EGLDisplay display, EglSync* sync);
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// Creates invalid object.
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EglSync() : EglSync(EGL_NO_DISPLAY, EGL_NO_SYNC_KHR) {}
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EglSync(EGLDisplay display, EGLSyncKHR sync)
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: display_(display), sync_(sync) {}
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// Move-only
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EglSync(EglSync&& sync);
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EglSync& operator=(EglSync&& sync);
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EglSync(const EglSync&) = delete;
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EglSync& operator=(const EglSync&) = delete;
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~EglSync() { Invalidate(); }
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// Causes GPU to block and wait until this sync has been signaled.
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// This call does not block and returns immediately.
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absl::Status ServerWait();
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// Causes CPU to block and wait until this sync has been signaled.
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absl::Status ClientWait();
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// Returns the EGLDisplay on which this instance was created.
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EGLDisplay display() const { return display_; }
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// Returns the EGLSyncKHR wrapped by this instance.
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EGLSyncKHR sync() const { return sync_; }
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// Returns true if this instance wraps a valid EGLSync object.
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bool is_valid() const { return sync_ != nullptr; }
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private:
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void Invalidate();
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EGLDisplay display_;
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EGLSyncKHR sync_;
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};
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} // namespace cl
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} // namespace gpu
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} // namespace tflite
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#endif // TENSORFLOW_LITE_DELEGATES_GPU_CL_EGL_SYNC_H_
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