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loongoffice/cppu/source/threadpool/current.cxx
Stephan Bergmann 206b5b2661 New loplugin:external 
...warning about (for now only) functions and variables with external linkage
that likely don't need it.

The problems with moving entities into unnamed namespacs and breaking ADL
(as alluded to in comments in compilerplugins/clang/external.cxx) are
illustrated by the fact that while

  struct S1 { int f() { return 0; } };
  int f(S1 s) { return s.f(); }
  namespace N {
    struct S2: S1 { int f() { return 1; } };
    int f(S2 s) { return s.f(); }
  }
  int main() { return f(N::S2()); }

returns 1, both moving just the struct S2 into an nunnamed namespace,

  struct S1 { int f() { return 0; } };
  int f(S1 s) { return s.f(); }
  namespace N {
    namespace { struct S2: S1 { int f() { return 1; } }; }
    int f(S2 s) { return s.f(); }
  }
  int main() { return f(N::S2()); }

as well as moving just the function f overload into an unnamed namespace,

  struct S1 { int f() { return 0; } };
  int f(S1 s) { return s.f(); }
  namespace N {
    struct S2: S1 { int f() { return 1; } };
    namespace { int f(S2 s) { return s.f(); } }
  }
  int main() { return f(N::S2()); }

would each change the program to return 0 instead.

Change-Id: I4d09f7ac5e8f9bcd6e6bde4712608444b642265c
Reviewed-on: https://gerrit.libreoffice.org/60539
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>
2018-09-17 09:05:38 +02:00

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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 <sal/config.h>
#include <rtl/byteseq.h>
#include <rtl/uuid.h>
#include <osl/thread.h>
#include <osl/mutex.hxx>
#include <uno/current_context.h>
#include <uno/environment.hxx>
#include <uno/mapping.hxx>
#include <typelib/typedescription.h>
#include "current.hxx"
using namespace ::osl;
using namespace ::rtl;
using namespace ::cppu;
using namespace ::com::sun::star::uno;
namespace cppu
{
static typelib_InterfaceTypeDescription * get_type_XCurrentContext()
{
static typelib_InterfaceTypeDescription * s_type_XCurrentContext = nullptr;
if (nullptr == s_type_XCurrentContext)
{
::osl::MutexGuard aGuard( ::osl::Mutex::getGlobalMutex() );
if (nullptr == s_type_XCurrentContext)
{
OUString sTypeName("com.sun.star.uno.XCurrentContext");
typelib_InterfaceTypeDescription * pTD = nullptr;
typelib_TypeDescriptionReference * pMembers[1] = { nullptr };
OUString sMethodName0("com.sun.star.uno.XCurrentContext::getValueByName");
typelib_typedescriptionreference_new(
&pMembers[0],
typelib_TypeClass_INTERFACE_METHOD,
sMethodName0.pData );
typelib_typedescription_newInterface(
&pTD,
sTypeName.pData, 0, 0, 0, 0, 0,
* typelib_static_type_getByTypeClass( typelib_TypeClass_INTERFACE ),
1,
pMembers );
typelib_typedescription_register( reinterpret_cast<typelib_TypeDescription**>(&pTD) );
typelib_typedescriptionreference_release( pMembers[0] );
typelib_InterfaceMethodTypeDescription * pMethod = nullptr;
typelib_Parameter_Init aParameters[1];
OUString sParamName0("Name");
OUString sParamType0("string");
aParameters[0].pParamName = sParamName0.pData;
aParameters[0].eTypeClass = typelib_TypeClass_STRING;
aParameters[0].pTypeName = sParamType0.pData;
aParameters[0].bIn = true;
aParameters[0].bOut = false;
rtl_uString * pExceptions[1];
OUString sExceptionName0("com.sun.star.uno.RuntimeException");
pExceptions[0] = sExceptionName0.pData;
OUString sReturnType0("any");
typelib_typedescription_newInterfaceMethod(
&pMethod,
3, false,
sMethodName0.pData,
typelib_TypeClass_ANY, sReturnType0.pData,
1, aParameters, 1, pExceptions );
typelib_typedescription_register( reinterpret_cast<typelib_TypeDescription**>(&pMethod) );
typelib_typedescription_release( &pMethod->aBase.aBase );
// another static ref:
++reinterpret_cast< typelib_TypeDescription * >( pTD )->
nStaticRefCount;
s_type_XCurrentContext = pTD;
}
}
return s_type_XCurrentContext;
}
class ThreadKey
{
bool _bInit;
oslThreadKey _hThreadKey;
oslThreadKeyCallbackFunction _pCallback;
public:
oslThreadKey getThreadKey()
{
if (! _bInit)
{
MutexGuard aGuard( Mutex::getGlobalMutex() );
if (! _bInit)
{
_hThreadKey = ::osl_createThreadKey( _pCallback );
_bInit = true;
}
}
return _hThreadKey;
}
explicit ThreadKey( oslThreadKeyCallbackFunction pCallback )
: _bInit(false)
, _hThreadKey(nullptr)
, _pCallback(pCallback)
{
}
~ThreadKey()
{
if (_bInit)
{
::osl_destroyThreadKey( _hThreadKey );
}
}
};
extern "C" {
static void delete_IdContainer( void * p )
{
if (p)
{
IdContainer * pId = static_cast< IdContainer * >( p );
if (pId->pCurrentContext)
{
(*pId->pCurrentContextEnv->releaseInterface)(
pId->pCurrentContextEnv, pId->pCurrentContext );
(*pId->pCurrentContextEnv->aBase.release)(
&pId->pCurrentContextEnv->aBase );
}
if (pId->bInit)
{
::rtl_byte_sequence_release( pId->pLocalThreadId );
::rtl_byte_sequence_release( pId->pCurrentId );
}
delete pId;
}
}
}
IdContainer * getIdContainer()
{
static ThreadKey s_key( delete_IdContainer );
oslThreadKey aKey = s_key.getThreadKey();
IdContainer * pId = static_cast< IdContainer * >( ::osl_getThreadKeyData( aKey ) );
if (! pId)
{
pId = new IdContainer;
pId->pCurrentContext = nullptr;
pId->pCurrentContextEnv = nullptr;
pId->bInit = false;
::osl_setThreadKeyData( aKey, pId );
}
return pId;
}
}
extern "C" sal_Bool SAL_CALL uno_setCurrentContext(
void * pCurrentContext,
rtl_uString * pEnvTypeName, void * pEnvContext )
SAL_THROW_EXTERN_C()
{
IdContainer * pId = getIdContainer();
OSL_ASSERT( pId );
// free old one
if (pId->pCurrentContext)
{
(*pId->pCurrentContextEnv->releaseInterface)(
pId->pCurrentContextEnv, pId->pCurrentContext );
(*pId->pCurrentContextEnv->aBase.release)(
&pId->pCurrentContextEnv->aBase );
pId->pCurrentContextEnv = nullptr;
pId->pCurrentContext = nullptr;
}
if (pCurrentContext)
{
uno_Environment * pEnv = nullptr;
::uno_getEnvironment( &pEnv, pEnvTypeName, pEnvContext );
OSL_ASSERT( pEnv && pEnv->pExtEnv );
if (pEnv)
{
if (pEnv->pExtEnv)
{
pId->pCurrentContextEnv = pEnv->pExtEnv;
(*pId->pCurrentContextEnv->acquireInterface)(
pId->pCurrentContextEnv, pCurrentContext );
pId->pCurrentContext = pCurrentContext;
}
else
{
(*pEnv->release)( pEnv );
return false;
}
}
else
{
return false;
}
}
return true;
}
extern "C" sal_Bool SAL_CALL uno_getCurrentContext(
void ** ppCurrentContext, rtl_uString * pEnvTypeName, void * pEnvContext )
SAL_THROW_EXTERN_C()
{
IdContainer * pId = getIdContainer();
OSL_ASSERT( pId );
Environment target_env;
// release inout parameter
if (*ppCurrentContext)
{
target_env = Environment(rtl::OUString(pEnvTypeName), pEnvContext);
OSL_ASSERT( target_env.is() );
if (! target_env.is())
return false;
uno_ExtEnvironment * pEnv = target_env.get()->pExtEnv;
OSL_ASSERT( nullptr != pEnv );
if (nullptr == pEnv)
return false;
(*pEnv->releaseInterface)( pEnv, *ppCurrentContext );
*ppCurrentContext = nullptr;
}
// case: null-ref
if (nullptr == pId->pCurrentContext)
return true;
if (! target_env.is())
{
target_env = Environment(rtl::OUString(pEnvTypeName), pEnvContext);
OSL_ASSERT( target_env.is() );
if (! target_env.is())
return false;
}
Mapping mapping(&pId->pCurrentContextEnv->aBase, target_env.get());
OSL_ASSERT( mapping.is() );
if (! mapping.is())
return false;
mapping.mapInterface(ppCurrentContext, pId->pCurrentContext, ::cppu::get_type_XCurrentContext() );
return true;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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