/*
 * The contents of this file are subject to the Netscape Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/NPL/

 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.

 * The Original Code is Rhino code, released
 * May 6, 1999.

 * The Initial Developer of the Original Code is Netscape
 * Communications Corporation.  Portions created by Netscape are
 * Copyright (C) 1997-1999 Netscape Communications Corporation. All
 * Rights Reserved.

 * Contributor(s): 

 * Alternatively, the contents of this file may be used under the
 * terms of the GNU Public License (the "GPL"), in which case the
 * provisions of the GPL are applicable instead of those above.
 * If you wish to allow use of your version of this file only
 * under the terms of the GPL and not to allow others to use your
 * version of this file under the NPL, indicate your decision by
 * deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL.  If you do not delete
 * the provisions above, a recipient may use your version of this
 * file under either the NPL or the GPL.
 */

#ifndef _JS_EXCEPTION_HANDLER_H_
#define _JS_EXCEPTION_HANDLER_H_

#ifdef VX
#include <vxWorks.h>
#endif
#include <setjmp.h>
#include "js-zonenew.h"
#include "js-context.h"
#include "js-stack.h"
#include "js-exception.h"

//int ThrowCallTimes; //for prevent print Throw Message over onece.

class JSExceptionHandler: public JSZoneNew {
    public:
	typedef struct {
	    jmp_buf	env;
	} JmpBuf;

    protected:
	typedef	JSStack<JmpBuf, JSContext::ZoneAllocator> _JSExceptionStack;

	class JSExceptionStack: public _JSExceptionStack {
	    public:
		JSExceptionStack(JSContext *cx)
			: _JSExceptionStack(&cx->allocator) {
		}
	
		JmpBuf	*getNext() {
		    ensureCapacity(elementCount + 1);
		    elementCount += 1;
    		    return &elementData[elementCount - 1];
		}
	} ;

    public:
#if __x86_64
        static pthread_key_t    key;
#endif
	JSExceptionStack	stack;

    public:
#if __x86_64
        static  void    classInitialize();
#endif

	JSExceptionHandler(JSContext *cx)
		: stack(cx) {
	}
	virtual ~JSExceptionHandler() {
	}

	JmpBuf *
		_enterTry();
	void	exitTry();
	void	throwEx(JSContext*cx, JSException *ex);
} ;

/* Macros */
// must be macros	
#if __x86_64
#define	enterTry(cx)	\
	( setjmp((cx)->exceptionHandler->_enterTry()->env) == 0 ? \
                NULL : \
                (JSException *) pthread_getspecific(JSExceptionHandler::key) )
#else
#define	enterTry(cx)	\
	((JSException *) setjmp((cx)->exceptionHandler->_enterTry()->env))
#endif

#endif /* _JS_EXCEPTION_HANDLER_H_ */

