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/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla 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/MPL/
*
* 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 the Python XPCOM language bindings.
*
* The Initial Developer of the Original Code is
* ActiveState Tool Corp.
* Portions created by the Initial Developer are Copyright (C) 2000
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Mark Hammond <MarkH@ActiveState.com> (original author)
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
// PyGWeakReference - implements weak references for gateways.
//
// This code is part of the XPCOM extensions for Python.
//
// Written November 2000 by Mark Hammond.
//
// Based heavily on the Python COM support, which is
// (c) Mark Hammond and Greg Stein.
//
// (c) 2000, ActiveState corp.
#include "PyXPCOM_std.h"
PyXPCOM_GatewayWeakReference::PyXPCOM_GatewayWeakReference( PyG_Base *base )
{
m_pBase = base;
#ifdef NS_BUILD_REFCNT_LOGGING
// bloat view uses 40 chars - stick "(WR)" at the end of this position.
strncpy(refcntLogRepr, m_pBase->refcntLogRepr, sizeof(refcntLogRepr));
refcntLogRepr[sizeof(refcntLogRepr)-1] = '\0';
char *dest = refcntLogRepr + ((strlen(refcntLogRepr) > 36) ? 36 : strlen(refcntLogRepr));
strcpy(dest, "(WR)");
#endif // NS_BUILD_REFCNT_LOGGING
}
PyXPCOM_GatewayWeakReference::~PyXPCOM_GatewayWeakReference()
{
// Simply zap my reference to the gateway!
// No need to zap my gateway's reference to me, as
// it already holds a reference, so if we are destructing,
// then it can't possibly hold one.
m_pBase = NULL;
}
nsrefcnt
PyXPCOM_GatewayWeakReference::AddRef(void)
{
nsrefcnt cnt = (nsrefcnt) PR_AtomicIncrement((PRInt32*)&mRefCnt);
#ifdef NS_BUILD_REFCNT_LOGGING
NS_LOG_ADDREF(this, cnt, refcntLogRepr, sizeof(*this));
#endif
return cnt;
}
nsrefcnt
PyXPCOM_GatewayWeakReference::Release(void)
{
nsrefcnt cnt = (nsrefcnt) PR_AtomicDecrement((PRInt32*)&mRefCnt);
#ifdef NS_BUILD_REFCNT_LOGGING
NS_LOG_RELEASE(this, cnt, refcntLogRepr);
#endif
if ( cnt == 0 )
delete this;
return cnt;
}
NS_IMPL_THREADSAFE_QUERY_INTERFACE1(PyXPCOM_GatewayWeakReference, nsIWeakReference)
NS_IMETHODIMP
PyXPCOM_GatewayWeakReference::QueryReferent(REFNSIID iid, void * *ret)
{
{
// Temp scope for lock. We can't hold the lock during
// a QI, as this may itself need the lock.
// Make sure our object isn't dieing right now on another thread.
CEnterLeaveXPCOMFramework _celf;
if (m_pBase == NULL)
return NS_ERROR_NULL_POINTER;
m_pBase->AddRef(); // Can't die while we have a ref.
} // end of lock scope - lock unlocked.
nsresult nr = m_pBase->QueryInterface(iid, ret);
m_pBase->Release();
return nr;
}
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