From f1a481eb18f305073bb43ea539593c86e941d620 Mon Sep 17 00:00:00 2001
From: Jean-Francois Remacle <jean-francois.remacle@uclouvain.be>
Date: Sun, 4 Mar 2001 19:55:25 +0000
Subject: [PATCH] Gmsh Plugin's
---
Plugin/Makefile | 50 ++++++++++++++++++++++++++++
Plugin/Plugin.cpp | 85 +++++++++++++++++++++++++++++++++++++++++++++++
Plugin/Plugin.h | 60 +++++++++++++++++++++++++++++++++
3 files changed, 195 insertions(+)
create mode 100644 Plugin/Makefile
create mode 100644 Plugin/Plugin.cpp
create mode 100644 Plugin/Plugin.h
diff --git a/Plugin/Makefile b/Plugin/Makefile
new file mode 100644
index 0000000000..8bf2a2e74e
--- /dev/null
+++ b/Plugin/Makefile
@@ -0,0 +1,50 @@
+# $Id: Makefile,v 1.1 2001-03-04 19:55:25 remacle Exp $
+#
+# Makefile for "libAdapt.a"
+#
+
+.IGNORE:
+
+CC = c++
+AR = ar ruvs
+RM = rm
+RANLIB = ranlib
+
+LIB = ../lib/libPlugin.a
+INCLUDE = -I../Common -I../DataStr
+
+C_FLAGS = -g -Wall
+OS_FLAGS =
+VERSION_FLAGS =
+
+RMFLAGS = -f
+CFLAGS = $(C_FLAGS) $(OS_FLAGS) $(VERSION_FLAGS) $(INCLUDE)
+
+SRC = Plugin.cpp
+
+OBJ = $(SRC:.cpp=.o)
+
+.SUFFIXES: .o .cpp
+
+$(LIB): $(OBJ)
+ $(AR) $(LIB) $(OBJ)
+ $(RANLIB) $(LIB)
+
+.cpp.o:
+ $(CC) $(CFLAGS) -c $<
+
+clean:
+ $(RM) $(RMFLAGS) *.o
+
+lint:
+ $(LINT) $(CFLAGS) $(SRC)
+
+depend:
+ (sed '/^# DO NOT DELETE THIS LINE/q' Makefile && \
+ $(CC) -MM $(CFLAGS) ${SRC} \
+ ) >Makefile.new
+ cp Makefile Makefile.bak
+ cp Makefile.new Makefile
+ $(RM) $(RMFLAGS) Makefile.new
+
+# DO NOT DELETE THIS LINE
diff --git a/Plugin/Plugin.cpp b/Plugin/Plugin.cpp
new file mode 100644
index 0000000000..001267d55e
--- /dev/null
+++ b/Plugin/Plugin.cpp
@@ -0,0 +1,85 @@
+#include <stdio.h>
+#include <dlfcn.h>
+#include <map>
+#include "Plugin.h"
+using namespace std;
+
+struct ltstr
+{
+ bool operator()(const char* s1, const char* s2) const
+ {
+ return strcmp(s1, s2) < 0;
+ }
+};
+
+class PluginContainer
+{
+public :
+ typedef map<char*,GMSH_Plugin*,ltstr>::iterator iter;
+ map<char*,GMSH_Plugin*,ltstr> m;
+ iter begin() {return m.begin();}
+ iter end() {return m.end();}
+ iter find(char *c) {return m.find(c);}
+};
+
+GMSH_PluginManager *GMSH_PluginManager::instance = 0;
+
+GMSH_PluginManager::GMSH_PluginManager()
+{
+ allPlugins = new PluginContainer;
+}
+
+GMSH_PluginManager::~GMSH_PluginManager()
+{
+ for(PluginContainer::iter it = allPlugins->begin();
+ it != allPlugins->end();
+ ++it)delete (*it).second;
+ delete allPlugins;
+}
+
+GMSH_PluginManager* GMSH_PluginManager::Instance()
+{
+ if(!instance)
+ {
+ instance = new GMSH_PluginManager;
+ }
+ return instance;
+}
+
+void GMSH_PluginManager::RegisterDefaultPlugins()
+{
+ char *homeplugins = getenv ("GMSHPLUGINSHOME");
+ if(!homeplugins)return;
+
+}
+
+void GMSH_PluginManager::AddPlugin( char *dirName, char *pluginName)
+{
+ char dynamic_lib[1024];
+ char plugin_name[256];
+ class GMSH_Plugin* (*RegisterPlugin)(void);
+ sprintf(dynamic_lib,"%s/%s.so",dirName,pluginName);
+ void *hlib = dlopen (dynamic_lib,RTLD_NOW);
+ if(hlib == NULL)
+ {
+ throw dynamic_lib;
+ }
+ RegisterPlugin = (class GMSH_Plugin* (*)(void)) dlsym(hlib,GMSH_PluginEntry);
+ char *err = dlerror();
+ if(err != NULL)
+ {
+ return;
+ }
+
+ GMSH_Plugin *p = RegisterPlugin();
+ p->hlib = hlib;
+ p->getName(plugin_name);
+ if(allPlugins->find(plugin_name) != allPlugins->end())
+ {
+ return;
+ }
+ allPlugins->m[plugin_name] = p;
+}
+
+
+
diff --git a/Plugin/Plugin.h b/Plugin/Plugin.h
new file mode 100644
index 0000000000..d66966a9a2
--- /dev/null
+++ b/Plugin/Plugin.h
@@ -0,0 +1,60 @@
+#ifndef _PLUGIN_H_
+#define _PLUGIN_H_
+/*
+ The one who intend to create a plugin for gmsh have to
+ -) Create a dynamin lib (.so) containing 1 symbols
+ GMSH_Plugin * GMSH_RegisterPlugin ();
+ -) When there is an unacceptable error in the plugin,
+ just throw this, the plugin manager will be able to
+ catch the exception.
+*/
+const char *GMSH_PluginEntry = "GMSH_RegisterPlugin";
+
+class PluginContainer;
+class GMSH_Plugin
+{
+public :
+ /*this is there for internal use, this variable will be
+ used by the PluginManager, just forget it*/
+ void *hlib;
+ /* 3 kind of plugins, one for cad, one for mesh, one for postpro*/
+ typedef enum GMSH_PLUGIN_TYPE {GMSH_CAD_PLUGIN, GMSH_MESH_PLUGIN, GMSH_POSTPRO_PLUGIN};
+ /* returns the type of plugin for downcasting GMSH_Plugin into
+ GMSH_CAD_Plugin, GMSH_Mesh_Plugin and GMSH_Post_Plugin */
+ virtual GMSH_PLUGIN_TYPE getType() const = 0;
+ virtual void getName (char *name);
+ virtual void getInfos (char *author,
+ char *copyright,
+ char *help_text) const = 0;
+ /* When an error is thrown by the plugin, the plugin manager
+ will show the message and hopefully continue */
+ virtual void CatchErrorMessage (char *errorMessage) const = 0;
+ /* gmsh style option, ca be loaded, saved and set*/
+ virtual void SetOption (char *optionName, void *optionValue) = 0;
+ virtual int getNbOptions() const;
+ virtual void GetOption (char *optionName, void *optionValue) const = 0;
+};
+
+class GMSH_PluginManager
+{
+/**
+ Registering all default plugins that are in $(GMSHPLUGINSHOME)
+ In fact, we will load all .so files in dir $(GMSHPLUGINSHOME)
+*/
+ void RegisterDefaultPlugins();
+ GMSH_PluginManager();
+ ~GMSH_PluginManager();
+ static GMSH_PluginManager *instance;
+ PluginContainer* allPlugins;
+public :
+ static GMSH_PluginManager *Instance();
+ /** Dynamically add a plugin pluginName.so in dirName*/
+ void AddPlugin(char *dirName, char *pluginName);
+ void CallPlugin (char *name);
+ void DestroyPlugin (char *name);
+ void SetPluginOption (char *pluginName, char *option, void *value);
+};
+#endif
+
+
+
--
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