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-rw-r--r--cppu/source/uno/EnvStack.cxx382
1 files changed, 382 insertions, 0 deletions
diff --git a/cppu/source/uno/EnvStack.cxx b/cppu/source/uno/EnvStack.cxx
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+++ b/cppu/source/uno/EnvStack.cxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you under the Apache
+ * License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <uno/environment.hxx>
+#include <uno/lbnames.h>
+
+#include <cppu/EnvDcp.hxx>
+#include <cppu/Enterable.hxx>
+
+#include <osl/thread.h>
+#include <osl/thread.hxx>
+#include <o3tl/string_view.hxx>
+
+#include <mutex>
+#include <unordered_map>
+
+using namespace com::sun::star;
+
+namespace {
+
+struct oslThreadIdentifier_equal
+{
+ bool operator()(oslThreadIdentifier s1, oslThreadIdentifier s2) const;
+};
+
+}
+
+bool oslThreadIdentifier_equal::operator()(oslThreadIdentifier s1, oslThreadIdentifier s2) const
+{
+ bool result = s1 == s2;
+
+ return result;
+}
+
+namespace {
+
+struct oslThreadIdentifier_hash
+{
+ size_t operator()(oslThreadIdentifier s1) const;
+};
+
+}
+
+size_t oslThreadIdentifier_hash::operator()(oslThreadIdentifier s1) const
+{
+ return s1;
+}
+
+typedef std::unordered_map<oslThreadIdentifier,
+ uno_Environment *,
+ oslThreadIdentifier_hash,
+ oslThreadIdentifier_equal> ThreadMap;
+
+namespace
+{
+ std::mutex s_threadMap_mutex;
+ ThreadMap s_threadMap;
+}
+
+static void s_setCurrent(uno_Environment * pEnv)
+{
+ oslThreadIdentifier threadId = osl::Thread::getCurrentIdentifier();
+
+ std::scoped_lock guard(s_threadMap_mutex);
+ if (pEnv)
+ {
+ s_threadMap[threadId] = pEnv;
+ }
+ else
+ {
+ ThreadMap::iterator iEnv = s_threadMap.find(threadId);
+ if( iEnv != s_threadMap.end())
+ s_threadMap.erase(iEnv);
+ }
+}
+
+static uno_Environment * s_getCurrent()
+{
+ uno_Environment * pEnv = nullptr;
+
+ oslThreadIdentifier threadId = osl::Thread::getCurrentIdentifier();
+
+ std::scoped_lock guard(s_threadMap_mutex);
+ ThreadMap::iterator iEnv = s_threadMap.find(threadId);
+ if(iEnv != s_threadMap.end())
+ pEnv = iEnv->second;
+
+ return pEnv;
+}
+
+
+extern "C" void SAL_CALL uno_getCurrentEnvironment(uno_Environment ** ppEnv, rtl_uString * pTypeName)
+ SAL_THROW_EXTERN_C()
+{
+ if (*ppEnv)
+ {
+ (*ppEnv)->release(*ppEnv);
+ *ppEnv = nullptr;
+ }
+
+ OUString currPurpose;
+
+ uno_Environment * pCurrEnv = s_getCurrent();
+ if (pCurrEnv) // no environment means no purpose
+ currPurpose = cppu::EnvDcp::getPurpose(pCurrEnv->pTypeName);
+
+ if (pTypeName && rtl_uString_getLength(pTypeName))
+ {
+ OUString envDcp = OUString::unacquired(&pTypeName) + currPurpose;
+
+ uno_getEnvironment(ppEnv, envDcp.pData, nullptr);
+ }
+ else
+ {
+ if (pCurrEnv)
+ {
+ *ppEnv = pCurrEnv;
+ (*ppEnv)->acquire(*ppEnv);
+ }
+ else
+ {
+ OUString uno_envDcp(UNO_LB_UNO);
+ uno_getEnvironment(ppEnv, uno_envDcp.pData, nullptr);
+ }
+ }
+}
+
+static OUString s_getPrefix(std::u16string_view str1, std::u16string_view str2)
+{
+ sal_Int32 nIndex1 = 0;
+ sal_Int32 nIndex2 = 0;
+ sal_Int32 sim = 0;
+
+ std::u16string_view token1;
+ std::u16string_view token2;
+
+ do
+ {
+ token1 = o3tl::getToken(str1, 0, ':', nIndex1);
+ token2 = o3tl::getToken(str2, 0, ':', nIndex2);
+
+ if (token1 == token2)
+ sim += token1.size() + 1;
+ }
+ while(nIndex1 == nIndex2 && nIndex1 >= 0 && token1 == token2);
+
+ OUString result;
+
+ if (sim)
+ result = str1.substr(0, sim - 1);
+
+ return result;
+}
+
+static int s_getNextEnv(uno_Environment ** ppEnv, uno_Environment * pCurrEnv, uno_Environment * pTargetEnv)
+{
+ int res = 0;
+
+ std::u16string_view nextPurpose;
+
+ OUString currPurpose;
+ if (pCurrEnv)
+ currPurpose = cppu::EnvDcp::getPurpose(pCurrEnv->pTypeName);
+
+ OUString targetPurpose;
+ if (pTargetEnv)
+ targetPurpose = cppu::EnvDcp::getPurpose(pTargetEnv->pTypeName);
+
+ OUString intermPurpose(s_getPrefix(currPurpose, targetPurpose));
+ if (currPurpose.getLength() > intermPurpose.getLength())
+ {
+ sal_Int32 idx = currPurpose.lastIndexOf(':');
+ nextPurpose = currPurpose.subView(0, idx);
+
+ res = -1;
+ }
+ else if (intermPurpose.getLength() < targetPurpose.getLength())
+ {
+ sal_Int32 idx = targetPurpose.indexOf(':', intermPurpose.getLength() + 1);
+ if (idx == -1)
+ nextPurpose = targetPurpose;
+
+ else
+ nextPurpose = targetPurpose.subView(0, idx);
+
+ res = 1;
+ }
+
+ if (!nextPurpose.empty())
+ {
+ OUString next_envDcp = OUString::Concat(UNO_LB_UNO) + nextPurpose;
+ uno_getEnvironment(ppEnv, next_envDcp.pData, nullptr);
+ }
+ else
+ {
+ if (*ppEnv)
+ (*ppEnv)->release(*ppEnv);
+
+ *ppEnv = nullptr;
+ }
+
+ return res;
+}
+
+extern "C" { static void s_pull(va_list * pParam)
+{
+ uno_EnvCallee * pCallee = va_arg(*pParam, uno_EnvCallee *);
+ va_list * pXparam = va_arg(*pParam, va_list *);
+
+ pCallee(pXparam);
+}}
+
+static void s_callInto_v(uno_Environment * pEnv, uno_EnvCallee * pCallee, va_list * pParam)
+{
+ cppu::Enterable * pEnterable = static_cast<cppu::Enterable *>(pEnv->pReserved);
+ if (pEnterable)
+ pEnterable->callInto(s_pull, pCallee, pParam);
+
+ else
+ pCallee(pParam);
+}
+
+static void s_callInto(uno_Environment * pEnv, uno_EnvCallee * pCallee, ...)
+{
+ va_list param;
+
+ va_start(param, pCallee);
+ s_callInto_v(pEnv, pCallee, &param);
+ va_end(param);
+}
+
+static void s_callOut_v(uno_Environment * pEnv, uno_EnvCallee * pCallee, va_list * pParam)
+{
+ cppu::Enterable * pEnterable = static_cast<cppu::Enterable *>(pEnv->pReserved);
+ if (pEnterable)
+ pEnterable->callOut_v(pCallee, pParam);
+
+ else
+ pCallee(pParam);
+}
+
+static void s_callOut(uno_Environment * pEnv, uno_EnvCallee * pCallee, ...)
+{
+ va_list param;
+
+ va_start(param, pCallee);
+ s_callOut_v(pEnv, pCallee, &param);
+ va_end(param);
+}
+
+static void s_environment_invoke_v(uno_Environment *, uno_Environment *, uno_EnvCallee *, va_list *);
+
+extern "C" { static void s_environment_invoke_vv(va_list * pParam)
+{
+ uno_Environment * pCurrEnv = va_arg(*pParam, uno_Environment *);
+ uno_Environment * pTargetEnv = va_arg(*pParam, uno_Environment *);
+ uno_EnvCallee * pCallee = va_arg(*pParam, uno_EnvCallee *);
+ va_list * pXparam = va_arg(*pParam, va_list *);
+
+ s_environment_invoke_v(pCurrEnv, pTargetEnv, pCallee, pXparam);
+}}
+
+static void s_environment_invoke_v(uno_Environment * pCurrEnv, uno_Environment * pTargetEnv, uno_EnvCallee * pCallee, va_list * pParam)
+{
+ uno_Environment * pNextEnv = nullptr;
+ switch(s_getNextEnv(&pNextEnv, pCurrEnv, pTargetEnv))
+ {
+ case -1:
+ s_setCurrent(pNextEnv);
+ s_callOut(pCurrEnv, s_environment_invoke_vv, pNextEnv, pTargetEnv, pCallee, pParam);
+ s_setCurrent(pCurrEnv);
+ break;
+
+ case 0: {
+ uno_Environment * hld = s_getCurrent();
+ s_setCurrent(pCurrEnv);
+ pCallee(pParam);
+ s_setCurrent(hld);
+ }
+ break;
+
+ case 1:
+ s_setCurrent(pNextEnv);
+ s_callInto(pNextEnv, s_environment_invoke_vv, pNextEnv, pTargetEnv, pCallee, pParam);
+ s_setCurrent(pCurrEnv);
+ break;
+ }
+
+ if (pNextEnv)
+ pNextEnv->release(pNextEnv);
+}
+
+extern "C" void SAL_CALL uno_Environment_invoke_v(uno_Environment * pTargetEnv, uno_EnvCallee * pCallee, va_list * pParam)
+ SAL_THROW_EXTERN_C()
+{
+ s_environment_invoke_v(s_getCurrent(), pTargetEnv, pCallee, pParam);
+}
+
+extern "C" void SAL_CALL uno_Environment_invoke(uno_Environment * pEnv, uno_EnvCallee * pCallee, ...)
+ SAL_THROW_EXTERN_C()
+{
+ va_list param;
+
+ va_start(param, pCallee);
+ uno_Environment_invoke_v(pEnv, pCallee, &param);
+ va_end(param);
+}
+
+extern "C" void SAL_CALL uno_Environment_enter(uno_Environment * pTargetEnv)
+ SAL_THROW_EXTERN_C()
+{
+ uno_Environment * pNextEnv = nullptr;
+ uno_Environment * pCurrEnv = s_getCurrent();
+
+ int res;
+ while ( (res = s_getNextEnv(&pNextEnv, pCurrEnv, pTargetEnv)) != 0)
+ {
+ cppu::Enterable * pEnterable;
+
+ switch(res)
+ {
+ case -1:
+ pEnterable = static_cast<cppu::Enterable *>(pCurrEnv->pReserved);
+ if (pEnterable)
+ pEnterable->leave();
+ pCurrEnv->release(pCurrEnv);
+ break;
+
+ case 1:
+ pNextEnv->acquire(pNextEnv);
+ pEnterable = static_cast<cppu::Enterable *>(pNextEnv->pReserved);
+ if (pEnterable)
+ pEnterable->enter();
+ break;
+ }
+
+ s_setCurrent(pNextEnv);
+ pCurrEnv = pNextEnv;
+ }
+}
+
+int SAL_CALL uno_Environment_isValid(uno_Environment * pEnv, rtl_uString ** pReason)
+ SAL_THROW_EXTERN_C()
+{
+ int result = 1;
+
+ OUString typeName(cppu::EnvDcp::getTypeName(pEnv->pTypeName));
+ if (typeName == UNO_LB_UNO)
+ {
+ cppu::Enterable * pEnterable = static_cast<cppu::Enterable *>(pEnv->pReserved);
+ if (pEnterable)
+ result = pEnterable->isValid(reinterpret_cast<OUString *>(pReason));
+ }
+ else
+ {
+ OUString envDcp = UNO_LB_UNO + cppu::EnvDcp::getPurpose(pEnv->pTypeName);
+
+ uno::Environment env(envDcp);
+
+ result = env.isValid(reinterpret_cast<OUString *>(pReason));
+ }
+
+ return result;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */