EGL_KHR_reusable_sync
https://www.khronos.org/registry/egl/specs/eglspec.1.5.pdf
EGL_KHR_reusable_sync

	EGL_SYNC_FLUSH_COMMANDS_BIT_KHR 0x0001
	EGL_SYNC_STATUS_KHR 0x30F1
	EGL_SIGNALED_KHR 0x30F2
	EGL_UNSIGNALED_KHR 0x30F3
	EGL_TIMEOUT_EXPIRED_KHR 0x30F5
	EGL_CONDITION_SATISFIED_KHR 0x30F6
	EGL_SYNC_TYPE_KHR 0x30F7
	EGL_SYNC_REUSABLE_KHR 0x30FA
	EGL_FOREVER_KHR 0xFFFFFFFFFFFFFFFF
	EGL_NO_SYNC_KHR EGL_CAST(EGLSyncKHR,0)
	EGLint eglClientWaitSyncKHR (EGLDisplay dpy, EGLSyncKHR sync, EGLint flags, EGLTimeKHR timeout)
	EGLSyncKHR eglCreateSyncKHR (EGLDisplay dpy, EGLenum type, const EGLint* attrib_list)
	EGLBoolean eglDestroySyncKHR (EGLDisplay dpy, EGLSyncKHR sync)
	EGLBoolean eglGetSyncAttribKHR (EGLDisplay dpy, EGLSyncKHR sync, EGLint attribute, EGLint* value)
	EGLBoolean eglSignalSyncKHR (EGLDisplay dpy, EGLSyncKHR sync, EGLenum mode)