From 419c23cd81c0648c97ebe5cb99c030252bcf6a68 Mon Sep 17 00:00:00 2001
From: Perry Werneck <perry.werneck@gmail.com>
Date: Thu, 14 Apr 2016 18:01:28 -0300
Subject: [PATCH] Adding automatic unload of pw3270 sessions when the JNI is unloaded (Linux only for now).

---
 src/classlib/session.cc    | 20 ++++++++++++++++++--
 src/include/pw3270/class.h |  4 ++++
 src/java/main.cc           | 17 +++++++++++++++++
 3 files changed, 39 insertions(+), 2 deletions(-)

diff --git a/src/classlib/session.cc b/src/classlib/session.cc
index 706c405..a7ae10f 100644
--- a/src/classlib/session.cc
+++ b/src/classlib/session.cc
@@ -46,14 +46,30 @@
 	#define nullptr	NULL
 #endif // !c11
 
+
 /*--[ Implement ]--------------------------------------------------------------------------------------------------*/
 
- namespace PW3270_NAMESPACE
- {
+ namespace PW3270_NAMESPACE {
+
 	session	* session::first						= nullptr;
 	session	* session::last							= nullptr;
 	session	* (*session::factory)(const char *name)	= nullptr;
 
+	void session::init()
+	{
+		trace("Loading %s objects",PACKAGE_NAME);
+	}
+
+	void session::deinit()
+	{
+		trace("Unloading %s objects",PACKAGE_NAME);
+		while(first)
+		{
+			delete first;
+		}
+
+	}
+
 	session::session()
 	{
 
diff --git a/src/include/pw3270/class.h b/src/include/pw3270/class.h
index dbf3cc8..2f62691 100644
--- a/src/include/pw3270/class.h
+++ b/src/include/pw3270/class.h
@@ -128,6 +128,10 @@
 
 		virtual ~session();
 
+		// Internal methods, used to init/deinit control tables.
+		static void		  init();
+		static void		  deinit();
+
 		// Factory methods and settings
 		static session	* start(const char *name = 0);
 		static session	* create(const char *name = 0) throw (std::exception);
diff --git a/src/java/main.cc b/src/java/main.cc
index b3eaf2c..08e984d 100644
--- a/src/java/main.cc
+++ b/src/java/main.cc
@@ -32,6 +32,23 @@
 
 /*---[ Implement ]----------------------------------------------------------------------------------*/
 
+#if defined(linux)
+ static void onLoad() __attribute__((constructor));
+ static void onUnLoad() __attribute__((destructor));
+#endif // linux
+
+ using namespace PW3270_NAMESPACE;
+
+ static void onLoad()
+ {
+	session::init();
+ }
+
+ static void onUnLoad()
+ {
+	session::deinit();
+ }
+
 namespace PW3270_NAMESPACE {
 
 	jfieldID java::getHandleField(JNIEnv *env, jobject obj) {
--
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