+#if FEATURE_APPLE_object_purgeable
+static GLenum
+intel_buffer_purgeable(GLcontext * ctx,
+ drm_intel_bo *buffer,
+ GLenum option)
+{
+ int retained = 0;
+
+ if (buffer != NULL)
+ retained = drm_intel_bo_madvise (buffer, I915_MADV_DONTNEED);
+
+ return retained ? GL_VOLATILE_APPLE : GL_RELEASED_APPLE;
+}
+
+static GLenum
+intel_buffer_object_purgeable(GLcontext * ctx,
+ struct gl_buffer_object *obj,
+ GLenum option)
+{
+ struct intel_buffer_object *intel;
+
+ intel = intel_buffer_object (obj);
+ if (intel->buffer != NULL)
+ return intel_buffer_purgeable (ctx, intel->buffer, option);
+
+ if (option == GL_RELEASED_APPLE) {
+ if (intel->sys_buffer != NULL) {
+ free(intel->sys_buffer);
+ intel->sys_buffer = NULL;
+ }
+
+ return GL_RELEASED_APPLE;
+ } else {
+ /* XXX Create the buffer and madvise(MADV_DONTNEED)? */
+ return intel_buffer_purgeable (ctx,
+ intel_bufferobj_buffer(intel_context(ctx),
+ intel, INTEL_READ),
+ option);
+ }
+}
+
+static GLenum
+intel_texture_object_purgeable(GLcontext * ctx,
+ struct gl_texture_object *obj,
+ GLenum option)
+{
+ struct intel_texture_object *intel;
+
+ intel = intel_texture_object(obj);
+ if (intel->mt == NULL || intel->mt->region == NULL)
+ return GL_RELEASED_APPLE;
+
+ return intel_buffer_purgeable (ctx, intel->mt->region->buffer, option);
+}
+
+static GLenum
+intel_render_object_purgeable(GLcontext * ctx,
+ struct gl_renderbuffer *obj,
+ GLenum option)
+{
+ struct intel_renderbuffer *intel;
+
+ intel = intel_renderbuffer(obj);
+ if (intel->region == NULL)
+ return GL_RELEASED_APPLE;
+
+ return intel_buffer_purgeable (ctx, intel->region->buffer, option);
+}
+
+static GLenum
+intel_buffer_unpurgeable(GLcontext * ctx,
+ drm_intel_bo *buffer,
+ GLenum option)
+{
+ int retained;
+
+ retained = 0;
+ if (buffer != NULL)
+ retained = drm_intel_bo_madvise (buffer, I915_MADV_WILLNEED);
+
+ return retained ? GL_RETAINED_APPLE : GL_UNDEFINED_APPLE;
+}
+
+static GLenum
+intel_buffer_object_unpurgeable(GLcontext * ctx,
+ struct gl_buffer_object *obj,
+ GLenum option)
+{
+ return intel_buffer_unpurgeable (ctx, intel_buffer_object (obj)->buffer, option);
+}
+
+static GLenum
+intel_texture_object_unpurgeable(GLcontext * ctx,
+ struct gl_texture_object *obj,
+ GLenum option)
+{
+ struct intel_texture_object *intel;
+
+ intel = intel_texture_object(obj);
+ if (intel->mt == NULL || intel->mt->region == NULL)
+ return GL_UNDEFINED_APPLE;
+
+ return intel_buffer_unpurgeable (ctx, intel->mt->region->buffer, option);
+}
+
+static GLenum
+intel_render_object_unpurgeable(GLcontext * ctx,
+ struct gl_renderbuffer *obj,
+ GLenum option)
+{
+ struct intel_renderbuffer *intel;
+
+ intel = intel_renderbuffer(obj);
+ if (intel->region == NULL)
+ return GL_UNDEFINED_APPLE;
+
+ return intel_buffer_unpurgeable (ctx, intel->region->buffer, option);
+}
+#endif
+