From patchwork Wed Sep 19 14:36:53 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yordan Karadzhov X-Patchwork-Id: 10759301 Return-Path: Received: from mail-wr1-f51.google.com ([209.85.221.51]:37380 "EHLO mail-wr1-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731654AbeISUPh (ORCPT ); Wed, 19 Sep 2018 16:15:37 -0400 Received: by mail-wr1-f51.google.com with SMTP id u12-v6so6067152wrr.4 for ; Wed, 19 Sep 2018 07:37:23 -0700 (PDT) From: "Yordan Karadzhov (VMware)" To: rostedt@goodmis.org Cc: linux-trace-devel@vger.kernel.org, "Yordan Karadzhov (VMware)" Subject: [PATCH v4 3/7] kernel-shark-qt: Add C++/C conversion for args of a plugin draw function. Date: Wed, 19 Sep 2018 17:36:53 +0300 Message-Id: <20180919143657.19472-4-y.karadz@gmail.com> In-Reply-To: <20180919143657.19472-1-y.karadz@gmail.com> References: <20180919143657.19472-1-y.karadz@gmail.com> Sender: linux-trace-devel-owner@vger.kernel.org List-ID: Content-Length: 1820 The draw function of a plugin has a type declared in C. However, the function needs to access some high level objects, defined in the C++ libraries. This patch adds instruments for converting the arguments of the plugin's draw function from C++ to C and from C to C++. Signed-off-by: Yordan Karadzhov (VMware) --- kernel-shark-qt/src/KsPlugins.hpp | 51 +++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 kernel-shark-qt/src/KsPlugins.hpp diff --git a/kernel-shark-qt/src/KsPlugins.hpp b/kernel-shark-qt/src/KsPlugins.hpp new file mode 100644 index 0000000..3955cdf --- /dev/null +++ b/kernel-shark-qt/src/KsPlugins.hpp @@ -0,0 +1,51 @@ +/* SPDX-License-Identifier: LGPL-2.1 */ + +/* + * Copyright (C) 2018 VMware Inc, Yordan Karadzhov + */ + +/** + * @file KsPlugins.hpp + * @brief KernelShark C++ plugin declarations. + */ + +#ifndef _KS_PLUGINS_H +#define _KS_PLUGINS_H + +// KernelShark +#include "libkshark-model.h" +#include "KsPlotTools.hpp" + +/** + * Structure representing the vector of C++ arguments of the drawing function + * of a plugin. + */ +struct KsCppArgV { + /** Pointer to the model descriptor object. */ + kshark_trace_histo *_histo; + + /** Pointer to the graph object. */ + KsPlot::Graph *_graph; + + /** + * Pointer to the list of shapes. All shapes created by the plugin + * will be added to this list. + */ + KsPlot::PlotObjList *_shapes; + + /** + * Convert the "this" pointer of the C++ argument vector into a + * C pointer. + */ + kshark_cpp_argv *toC() + { + return reinterpret_cast(this); + } +}; + +/** + * Macro used to convert a C pointer into a pointer to KsCppArgV (C++ struct). + */ +#define KS_ARGV_TO_CPP(a) (reinterpret_cast(a)) + +#endif