1 files changed, 70 insertions, 0 deletions

diff --git a/xbmc/utils/EGLFence.cpp b/xbmc/utils/EGLFence.cpp
new file mode 100644
index 0000000..369c40a
--- /dev/null
+++ b/xbmc/utils/EGLFence.cpp
@@ -0,0 +1,70 @@
+/*
+ *  Copyright (C) 2017-2018 Team Kodi
+ *  This file is part of Kodi - https://kodi.tv
+ *
+ *  SPDX-License-Identifier: GPL-2.0-or-later
+ *  See LICENSES/README.md for more information.
+ */
+
+#include "EGLFence.h"
+
+#include "EGLUtils.h"
+#include "utils/log.h"
+
+using namespace KODI::UTILS::EGL;
+
+CEGLFence::CEGLFence(EGLDisplay display) :
+  m_display(display)
+{
+  m_eglCreateSyncKHR = CEGLUtils::GetRequiredProcAddress<PFNEGLCREATESYNCKHRPROC>("eglCreateSyncKHR");
+  m_eglDestroySyncKHR = CEGLUtils::GetRequiredProcAddress<PFNEGLDESTROYSYNCKHRPROC>("eglDestroySyncKHR");
+  m_eglGetSyncAttribKHR = CEGLUtils::GetRequiredProcAddress<PFNEGLGETSYNCATTRIBKHRPROC>("eglGetSyncAttribKHR");
+}
+
+void CEGLFence::CreateFence()
+{
+  m_fence = m_eglCreateSyncKHR(m_display, EGL_SYNC_FENCE_KHR, nullptr);
+  if (m_fence == EGL_NO_SYNC_KHR)
+  {
+    CEGLUtils::Log(LOGERROR, "failed to create egl sync fence");
+    throw std::runtime_error("failed to create egl sync fence");
+  }
+}
+
+void CEGLFence::DestroyFence()
+{
+  if (m_fence == EGL_NO_SYNC_KHR)
+  {
+    return;
+  }
+
+  if (m_eglDestroySyncKHR(m_display, m_fence) != EGL_TRUE)
+  {
+    CEGLUtils::Log(LOGERROR, "failed to destroy egl sync fence");
+  }
+
+  m_fence = EGL_NO_SYNC_KHR;
+}
+
+bool CEGLFence::IsSignaled()
+{
+  // fence has been destroyed so return true immediately so buffer can be used
+  if (m_fence == EGL_NO_SYNC_KHR)
+  {
+    return true;
+  }
+
+  EGLint status = EGL_UNSIGNALED_KHR;
+  if (m_eglGetSyncAttribKHR(m_display, m_fence, EGL_SYNC_STATUS_KHR, &status) != EGL_TRUE)
+  {
+    CEGLUtils::Log(LOGERROR, "failed to query egl sync fence");
+    return false;
+  }
+
+  if (status == EGL_SIGNALED_KHR)
+  {
+    return true;
+  }
+
+  return false;
+}