jni.h (_Jv_JNIEnv::bottom_locals): New field.

2005-01-13  Graydon Hoare  <graydon@redhat.com>

	* include/jni.h (_Jv_JNIEnv::bottom_locals): New field.
	* include/jvm.h (_Jv_FreeJNIEnv): Declare.
	* java/lang/natThread.cc (finalize_native): Call _Jv_FreeJNIEnv.
	* jni.cc: Reuse bottom frame between calls, avoid clearing
	frame when no local references are made.

From-SVN: r93632

libjava/include/jni.h

@@ -693,6 +693,10 @@ private:
   /* The chain of local frames.  */
   struct _Jv_JNI_LocalFrame *locals;
 
+  /* The bottom-most element of the chain, initialized with the env and
+     reused between non-nesting JNI calls.  */
+  struct _Jv_JNI_LocalFrame *bottom_locals;
+
 public:
   jint GetVersion ()
   { return p->GetVersion (this); }

libjava/include/jvm.h

@@ -522,6 +522,9 @@ extern void _Jv_JNI_Init (void);
 _Jv_JNIEnv *_Jv_GetCurrentJNIEnv ();
 void _Jv_SetCurrentJNIEnv (_Jv_JNIEnv *);
 
+/* Free a JNIEnv. */
+void _Jv_FreeJNIEnv (_Jv_JNIEnv *);
+
 struct _Jv_JavaVM;
 _Jv_JavaVM *_Jv_GetJavaVM ();