GL_NV_timeline_semaphore
https://www.khronos.org/registry/OpenGL/extensions/NV/NV_timeline_semaphore.txt
GL_NV_timeline_semaphore

	GL_TIMELINE_SEMAPHORE_VALUE_NV 0x9595
	GL_SEMAPHORE_TYPE_NV 0x95B3
	GL_SEMAPHORE_TYPE_BINARY_NV 0x95B4
	GL_SEMAPHORE_TYPE_TIMELINE_NV 0x95B5
	GL_MAX_TIMELINE_SEMAPHORE_VALUE_DIFFERENCE_NV 0x95B6
	void glCreateSemaphoresNV (GLsizei n, GLuint* semaphores)
	void glGetSemaphoreParameterivNV (GLuint semaphore, GLenum pname, GLint* params)
	void glSemaphoreParameterivNV (GLuint semaphore, GLenum pname, const GLint* params)