3 files changed, 67 insertions, 11 deletions
diff --git a/CNativeCode/jawt_misc.c b/CNativeCode/jawt_misc.c
index f906ba4..bdf8fe7 100644
--- a/CNativeCode/jawt_misc.c
+++ b/CNativeCode/jawt_misc.c
@@ -16,40 +16,93 @@ static int  gds  = 0;
 
 static jboolean jawtdebug  = JNI_FALSE;
 
+#ifdef _WIN32_ 
+  static HMODULE hDLL_JAWT = 0;
+#endif
+
+#ifdef _X11_ 
+  static void * libHandleJAWT = 0;
+#endif
+
+
 jboolean LIBAPIENTRY
 jawt_init (char* jawtLibName)
 {
+
 #ifdef _WIN32_ 
-  HMODULE lib = LoadLibrary(jawtLibName);
-  if (lib == NULL) {
+
+  if ( hDLL_JAWT==NULL )
+	  hDLL_JAWT = LoadLibrary(jawtLibName);
+
+  if ( hDLL_JAWT==NULL )
+  {
     printf("  jawt_init: LoadLibrary failed\n");
     return JNI_FALSE;
   }
-  JAWT_GetAWT_fn = (JAWT_GetAWT_fn_t*) GetProcAddress(lib, "_JAWT_GetAWT@8");
+
+  JAWT_GetAWT_fn = (JAWT_GetAWT_fn_t*) 
+  	GetProcAddress(hDLL_JAWT, "_JAWT_GetAWT@8");
+
   if (JAWT_GetAWT_fn == NULL) {
     printf("  jawt_init: GetProcAddress failed\n");
     return JNI_FALSE;
   }
   return JNI_TRUE;
+
 #endif
 
 #ifdef _X11_ 
-  void* lib = dlopen(jawtLibName, RTLD_LAZY | RTLD_GLOBAL);
-  if (lib == NULL) {
+
+  if ( libHandleJAWT == NULL )
+	  libHandleJAWT = dlopen(jawtLibName, RTLD_LAZY | RTLD_GLOBAL);
+
+  if ( libHandleJAWT == NULL) {
     printf("  jawt_init: dlopen failed\n");
     return JNI_FALSE;
   }
-  JAWT_GetAWT_fn = (JAWT_GetAWT_fn_t*) dlsym(lib, "JAWT_GetAWT");
+
+  JAWT_GetAWT_fn = (JAWT_GetAWT_fn_t*) dlsym(libHandleJAWT, "JAWT_GetAWT");
+
   if (JAWT_GetAWT_fn == NULL) {
     printf("  jawt_init: dlsym failed\n");
     return JNI_FALSE;
   }
+
   return JNI_TRUE;
+
 #endif
 
   return JNI_FALSE;
 }
 
+void LIBAPIENTRY
+jawt_unload ()
+{
+
+#ifdef _WIN32_ 
+
+  if ( hDLL_JAWT!=NULL )
+  {
+	  JAWT_GetAWT_fn = NULL;
+	  FreeLibrary(hDLL_JAWT);
+	  hDLL_JAWT = NULL;
+  }
+
+#endif
+
+#ifdef _X11_ 
+
+  if ( libHandleJAWT != NULL )
+  {
+	  JAWT_GetAWT_fn = NULL;
+	  dlClose(libHandleJAWT);
+	  libHandleJAWT = NULL;
+  }
+
+#endif
+
+}
+
 jboolean LIBAPIENTRY
 jawt_create_offscreen (JNIEnv *env, JAWTDataHolder **ppJData, jboolean verbose) 
 {
diff --git a/CNativeCode/jawt_misc.h b/CNativeCode/jawt_misc.h
index 293ffa9..4504b46 100644
--- a/CNativeCode/jawt_misc.h
+++ b/CNativeCode/jawt_misc.h
@@ -59,8 +59,9 @@
 		  jboolean result;
 	} JAWTDataHolder;
 	 
-	LIBAPI jboolean LIBAPIENTRY
-	jawt_init (char* jawtLibName); 
+	LIBAPI jboolean LIBAPIENTRY jawt_init (char* jawtLibName); 
+
+	LIBAPI void LIBAPIENTRY jawt_unload();
 
 	LIBAPI jboolean LIBAPIENTRY
 	jawt_create_offscreen (JNIEnv *env, JAWTDataHolder **ppJData, 
diff --git a/CNativeCode/jni12tools.c b/CNativeCode/jni12tools.c
index 09b948a..4a13a52 100644
--- a/CNativeCode/jni12tools.c
+++ b/CNativeCode/jni12tools.c
@@ -1,7 +1,8 @@
 #include <string.h>
 #include "jnitools.h"
-
-#include "gltool.h"
+#include "jawt_misc.h"
+
+#include "gltool.h"
 
 #ifdef __BUILTIN_VA_ARG_INCR
         /* Special stuff for the SunOS port ... */
@@ -538,7 +539,8 @@ JNI_OnLoad(JavaVM * vm, void *reserved)
 
 JNIEXPORT void JNICALL
 JNI_OnUnload(JavaVM *vm, void *reserved)
-{
+{
 	unloadGLLibrary();
+	jawt_unload();
 }