130 lines
4.5 KiB
C++
130 lines
4.5 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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#include "tensorflow/lite/delegates/gpu/cl/egl_sync.h"
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#include "tensorflow/lite/delegates/gpu/gl/gl_call.h"
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namespace tflite {
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namespace gpu {
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namespace cl {
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namespace {
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bool HasExtension(EGLDisplay display, const char* extension) {
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const char* extensions = eglQueryString(display, EGL_EXTENSIONS);
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return extensions && std::strstr(extensions, extension);
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}
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absl::Status IsEglFenceSyncSupported(EGLDisplay display) {
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static bool supported = HasExtension(display, "EGL_KHR_fence_sync");
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if (supported) {
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return absl::OkStatus();
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}
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return absl::InternalError("Not supported: EGL_KHR_fence_sync");
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}
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absl::Status IsEglWaitSyncSupported(EGLDisplay display) {
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static bool supported = HasExtension(display, "EGL_KHR_wait_sync");
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if (supported) {
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return absl::OkStatus();
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}
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return absl::InternalError("Not supported: EGL_KHR_wait_sync");
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}
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} // anonymous namespace
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absl::Status EglSync::NewFence(EGLDisplay display, EglSync* sync) {
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RETURN_IF_ERROR(IsEglFenceSyncSupported(display));
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static auto* egl_create_sync_khr =
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reinterpret_cast<decltype(&eglCreateSyncKHR)>(
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eglGetProcAddress("eglCreateSyncKHR"));
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if (egl_create_sync_khr == nullptr) {
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// Needs extension: EGL_KHR_fence_sync (EGL) / GL_OES_EGL_sync (OpenGL ES).
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return absl::InternalError(
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"Not supported / bad EGL implementation: eglCreateSyncKHR.");
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}
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EGLSyncKHR egl_sync;
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RETURN_IF_ERROR(TFLITE_GPU_CALL_EGL(*egl_create_sync_khr, &egl_sync, display,
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EGL_SYNC_FENCE_KHR, nullptr));
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if (egl_sync == EGL_NO_SYNC_KHR) {
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return absl::InternalError("Returned empty KHR EGL sync");
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}
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*sync = EglSync(display, egl_sync);
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return absl::OkStatus();
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}
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EglSync& EglSync::operator=(EglSync&& sync) {
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if (this != &sync) {
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Invalidate();
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std::swap(sync_, sync.sync_);
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display_ = sync.display_;
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}
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return *this;
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}
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void EglSync::Invalidate() {
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if (sync_ != EGL_NO_SYNC_KHR) {
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static auto* egl_destroy_sync_khr =
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reinterpret_cast<decltype(&eglDestroySyncKHR)>(
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eglGetProcAddress("eglDestroySyncKHR"));
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// Needs extension: EGL_KHR_fence_sync (EGL) / GL_OES_EGL_sync (OpenGL ES).
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if (IsEglFenceSyncSupported(display_).ok() && egl_destroy_sync_khr) {
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// Note: we're doing nothing when the function pointer is nullptr, or the
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// call returns EGL_FALSE.
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(*egl_destroy_sync_khr)(display_, sync_);
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}
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sync_ = EGL_NO_SYNC_KHR;
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}
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}
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absl::Status EglSync::ServerWait() {
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RETURN_IF_ERROR(IsEglWaitSyncSupported(display_));
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static auto* egl_wait_sync_khr = reinterpret_cast<decltype(&eglWaitSyncKHR)>(
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eglGetProcAddress("eglWaitSyncKHR"));
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if (egl_wait_sync_khr == nullptr) {
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// Needs extension: EGL_KHR_wait_sync
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return absl::InternalError("Not supported: eglWaitSyncKHR.");
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}
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EGLint result;
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RETURN_IF_ERROR(
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TFLITE_GPU_CALL_EGL(*egl_wait_sync_khr, &result, display_, sync_, 0));
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return result == EGL_TRUE ? absl::OkStatus()
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: absl::InternalError("eglWaitSync failed");
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}
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absl::Status EglSync::ClientWait() {
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RETURN_IF_ERROR(IsEglFenceSyncSupported(display_));
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static auto* egl_client_wait_sync_khr =
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reinterpret_cast<decltype(&eglClientWaitSyncKHR)>(
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eglGetProcAddress("eglClientWaitSyncKHR"));
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if (egl_client_wait_sync_khr == nullptr) {
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// Needs extension: EGL_KHR_fence_sync (EGL) / GL_OES_EGL_sync (OpenGL ES).
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return absl::InternalError("Not supported: eglClientWaitSyncKHR.");
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}
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EGLint result;
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// TODO(akulik): make it active wait for better performance
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RETURN_IF_ERROR(
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TFLITE_GPU_CALL_EGL(*egl_client_wait_sync_khr, &result, display_, sync_,
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EGL_SYNC_FLUSH_COMMANDS_BIT_KHR, EGL_FOREVER_KHR));
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return result == EGL_CONDITION_SATISFIED_KHR
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? absl::OkStatus()
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: absl::InternalError("eglClientWaitSync failed");
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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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