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Diffstat (limited to 'src/libs/xpcom18a4/python/src/PyGWeakReference.cpp')
| -rw-r--r-- | src/libs/xpcom18a4/python/src/PyGWeakReference.cpp | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/src/libs/xpcom18a4/python/src/PyGWeakReference.cpp b/src/libs/xpcom18a4/python/src/PyGWeakReference.cpp new file mode 100644 index 00000000..e5254acc --- /dev/null +++ b/src/libs/xpcom18a4/python/src/PyGWeakReference.cpp @@ -0,0 +1,112 @@ +/* ***** 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; +} |