C++ ObjList::get方法代码示例

SIPEvent* SIPEngine::getEvent()
{
    Lock lock(this);
    ObjList* l = m_transList.skipNull();
    if (!l)
	return 0;
    u_int64_t time = Time::now();
    for (; l; l = l->skipNext()) {
	SIPTransaction* t = static_cast<SIPTransaction*>(l->get());
	SIPEvent* e = t->getEvent(true,time);
	if (e) {
	    DDebug(this,DebugInfo,"Got pending event %p (state %s) from transaction %p [%p]",
		e,SIPTransaction::stateName(e->getState()),t,this);
	    if (t->getState() == SIPTransaction::Invalid)
		m_transList.remove(t);
	    return e;
	}
    }
    time = Time::now();
    for (l = m_transList.skipNull(); l; l = l->skipNext()) {
	SIPTransaction* t = static_cast<SIPTransaction*>(l->get());
	SIPEvent* e = t->getEvent(false,time);
	if (e) {
	    DDebug(this,DebugInfo,"Got event %p (state %s) from transaction %p [%p]",
		e,SIPTransaction::stateName(e->getState()),t,this);
	    if (t->getState() == SIPTransaction::Invalid)
		m_transList.remove(t);
	    return e;
	}
    }
    return 0;
}

void ListIterator::assign(HashList& list, int offset)
{
    clear();
    m_hashList = &list;
    m_length = list.count();
    if (!m_length)
	return;
    m_objects = new GenObject* [m_length];
    m_hashes = new unsigned int[m_length];
    offset = (m_length - offset) % m_length;
    unsigned int i = 0;
    for (unsigned int n = 0; n < list.length(); n++) {
	ObjList* l = list.getList(n);
	if (!l)
	    continue;
	for (l = l->skipNull(); i < m_length; l = l->skipNext()) {
	    if (!l)
		break;
	    unsigned int idx = ((i++) + offset) % m_length;
	    m_objects[idx] = l->get();
	    m_hashes[idx] = l->get()->toString().hash();
	}
    }
    while (i < m_length)
	m_objects[((i++) + offset) % m_length] = 0;
}

// Convert this message to a string representation
void MGCPMessage::toString(String& dest) const
{
    // Construct first line
    dest << name() << " " << transactionId();
    if (isCommand())
	dest << " " << endpointId() << " " << m_version;
    else if (m_comment)
	dest << " " << m_comment;
    dest << "\r\n";

    // Append message parameters
    unsigned int n = params.count();
    for (unsigned int i = 0; i < n; i++) {
	NamedString* ns = params.getParam(i);
	if (!ns)
	    continue;
	dest << ns->name() << ": " << *ns << "\r\n";
    }

    // Append SDP(s)
    for (ObjList* obj = sdp.skipNull(); obj; obj = obj->skipNext()) {
	String s;
	MimeSdpBody* tmp = static_cast<MimeSdpBody*>(obj->get());
	for (ObjList* o = tmp->lines().skipNull(); o; o = o->skipNext()) {
	    NamedString* ns = static_cast<NamedString*>(o->get());
	    if (*ns)
		s << ns->name() << "=" << *ns << "\r\n";
	}
	if (s)
	    dest << "\r\n" << s;
    }
}

// Insert a record into a list in the proper location
// Order records ascending by their order
// Look at ascPref for records with the same order
bool DnsRecord::insert(ObjList& list, DnsRecord* rec, bool ascPref)
{
    if (!rec || list.find(rec))
	return false;
    XDebug(DebugAll,"DnsRecord::insert(%p) order=%d pref=%d",rec,rec->order(),rec->pref());
    ObjList* o = list.skipNull();
    for (; o; o = o->skipNext()) {
	DnsRecord* crt = static_cast<DnsRecord*>(o->get());
	if (rec->order() > crt->order())
	    continue;
	if (rec->order() == crt->order()) {
	    for (; o; o = o->skipNext()) {
		DnsRecord* crt = static_cast<DnsRecord*>(o->get());
		if (crt->order() != rec->order())
		    break;
		if (crt->pref() == rec->pref())
		    continue;
		if (ascPref == (rec->pref() < crt->pref()))
		    break;
	    }
	}
	break;
    }
    if (o)
	o->insert(rec);
    else
	list.append(rec);
    return true;
}

// Utility: print the result of dns query
// Return the code
static int printResult(int type, int code, const char* dname, ObjList& result, String* error)
{
#ifdef DEBUG
    if (!code) {
	String s;
	int crt = 0;
	for (ObjList* o = result.skipNull(); o; o = o->skipNext()) {
	    DnsRecord* rec = static_cast<DnsRecord*>(o->get());
	    if (!s)
		s << "\r\n-----";
	    s << "\r\n" << ++crt << ":";
	    rec->dump(s);
	}
	if (s)
	    s << "\r\n-----";
	Debug(DebugAll,"%s query for '%s' got %d records%s",
	    lookup(type,Resolver::s_types),dname,result.count(),s.safe());
    }
    else {
	String dummy;
	if (!error) {
	    error = &dummy;
#ifdef _WINDOWS
	    Thread::errorString(dummy,code);
#elif defined(__NAMESER)
	    dummy = hstrerror(code);
#endif
	}
	Debug(DebugNote,"%s query for '%s' failed with code %d error=%s",
	    lookup(type,Resolver::s_types),dname,code,TelEngine::c_safe(error));
    }
#endif
    return code;
}

bool HashList::resync()
{
    XDebug(DebugAll,"HashList::resync() [%p]",this);
    bool moved = false;
    for (unsigned int n = 0; n < m_size; n++) {
        ObjList* l = m_lists[n];
        while (l) {
            GenObject* obj = l->get();
            if (obj) {
                unsigned int i = obj->toString().hash() % m_size;
                if (i != n) {
                    bool autoDel = l->autoDelete();
                    m_lists[n]->remove(obj,false);
                    if (!m_lists[i])
                        m_lists[i] = new ObjList;
                    m_lists[i]->append(obj)->setDelete(autoDel);
                    moved = true;
                    continue;
                }
            }
            l = l->next();
        }
    }
    return moved;
}

unsigned int ObjVector::assign(ObjList& list, bool move, unsigned int maxLen)
{
    if (!maxLen)
	maxLen = list.count();
    clear();
    if (maxLen) {
	m_objects = new GenObject*[maxLen];
	ObjList* l = list.skipNull();
	for (unsigned int i = 0; i < maxLen; i++) {
	    if (l) {
		if (move) {
		    m_objects[i] = l->remove(false);
		    l = l->skipNull();
		}
		else {
		    m_objects[i] = l->get();
		    l = l->skipNext();
		}
	    }
	    else
		m_objects[i] = 0;
	}
	m_length = maxLen;
    }
    return maxLen;
}

String ExpEvaluator::dump() const
{
    String res;
    for (ObjList* l = m_opcodes.skipNull(); l; l = l->skipNext()) {
        const ExpOperation* o = static_cast<const ExpOperation*>(l->get());
        const char* oper = getOperator(o->opcode());
        if (oper) {
            res << " " << oper;
            continue;
        }
        switch (o->opcode()) {
        case OpcPush:
            if (o->number())
                res << " " << (int)o->number();
            else
                res << " '" << *o << "'";
            break;
        case OpcField:
            res << " " << o->name();
            break;
        case OpcFunc:
            res << " " << o->name() << "(" << (int)o->number() << ")";
            break;
        default:
            res << " [" << o->opcode() << "]";
        }
    }
    return res;
}

GenObject* ObjList::remove(bool delobj)
{
    GenObject *tmp = m_obj;

    if (m_next) {
	ObjList *n = m_next;
	m_next = n->next();
	m_obj = n->get();
	m_delete = n->m_delete;
	n->m_obj = 0;
	n->m_next = 0;
	n->destruct();
    }
    else
	m_obj = 0;

    if (delobj && tmp) {
	XDebug(DebugInfo,"ObjList::remove() deleting %p",tmp);
	// Don't use TelEngine::destruct(): the compiler will call the non-template
	// function (which doesn't reset the pointer)
	tmp->destruct();
	tmp = 0;
    }
    return tmp;
}

// Update members with data taken from a SDP, return true if something changed
bool SDPMedia::update(const char* formats, int rport, int lport, bool force)
{
    DDebug(DebugAll,"SDPMedia::update('%s',%d,%d,%s) [%p]",
	formats,rport,lport,String::boolText(force),this);
    bool chg = false;
    String tmp(formats);
    if (tmp && (m_formats != tmp)) {
	if (tmp.find(',') < 0) {
	    // single format received, check if acceptable
	    if (m_formats && !force && m_formats.find(tmp) < 0) {
		Debug(DebugNote,"Not changing to '%s' from '%s' [%p]",
		    formats,m_formats.c_str(),this);
		tmp.clear();
	    }
	}
	else if (m_formats && !force) {
	    // from received list keep only already offered formats
	    ObjList* l1 = tmp.split(',',false);
	    ObjList* l2 = m_formats.split(',',false);
	    for (ObjList* fmt = l1->skipNull(); fmt; ) {
		if (l2->find(fmt->get()->toString()))
		    fmt = fmt->skipNext();
		else {
		    fmt->remove();
		    fmt = fmt->skipNull();
		}
	    }
	    tmp.clear();
	    tmp.append(l1,",");
	    TelEngine::destruct(l1);
	    TelEngine::destruct(l2);
	    if (tmp.null())
		Debug(DebugNote,"Not changing formats '%s' [%p]",m_formats.c_str(),this);
	}
	if (tmp && (m_formats != tmp)) {
	    chg = true;
	    m_formats = tmp;
	    int q = m_formats.find(',');
	    m_format = m_formats.substr(0,q);
	    Debug(DebugInfo,"Choosing offered '%s' format '%s' [%p]",
		c_str(),m_format.c_str(),this);
	}
    }
    if (rport >= 0) {
	tmp = rport;
	if (m_rPort != tmp) {
	    chg = true;
	    m_rPort = tmp;
	}
    }
    if (lport >= 0) {
	tmp = lport;
	if (m_lPort != tmp) {
	    m_localChanged = true;
	    chg = true;
	    m_lPort = tmp;
	}
    }
    return chg;
}

void RTPGroup::run()
{
    DDebug(DebugInfo,"RTPGroup::run() [%p]",this);
    bool ok = true;
    while (ok) {
	unsigned long msec = m_sleep;
	if (msec < s_sleep)
	    msec = s_sleep;
	lock();
	Time t;
	ObjList* l = &m_processors;
	m_listChanged = false;
	for (ok = false;l;l = l->next()) {
	    RTPProcessor* p = static_cast<RTPProcessor*>(l->get());
	    if (p) {
		ok = true;
		p->timerTick(t);
		// the list is protected from other threads but can be changed
		//  from this one so if it happened we just break out and try
		//  again later rather than using an expensive ListIterator
		if (m_listChanged)
		    break;
	    }
	}
	unlock();
	Thread::msleep(msec,true);
    }
    DDebug(DebugInfo,"RTPGroup::run() ran out of processors [%p]",this);
}

// Copy a SrvRecord list into another one
void SrvRecord::copy(ObjList& dest, const ObjList& src)
{
    dest.clear();
    for (ObjList* o = src.skipNull(); o; o = o->skipNext()) {
	SrvRecord* rec = static_cast<SrvRecord*>(o->get());
	dest.append(new SrvRecord(rec->order(),rec->pref(),rec->address(),rec->port()));
    }
}

void Socket::timerTick(const Time& when)
{
    for (ObjList* l = &m_filters; l; l = l->next()) {
	SocketFilter* filter = static_cast<SocketFilter*>(l->get());
	if (filter)
	    filter->timerTick(when);
    }
}

ExpEvaluator::ExpEvaluator(const ExpEvaluator& original)
    : m_operators(original.m_operators), m_extender(0)
{
    extender(original.extender());
    for (ObjList* l = original.m_opcodes.skipNull(); l; l = l->skipNext()) {
        const ExpOperation* o = static_cast<const ExpOperation*>(l->get());
        m_opcodes.append(new ExpOperation(*o));
    }
}

void RTPGroup::cleanup()
{
    DDebug(DebugInfo,"RTPGroup::cleanup() [%p]",this);
    lock();
    m_listChanged = true;
    ObjList* l = &m_processors;
    while (l) {
	RTPProcessor* p = static_cast<RTPProcessor*>(l->get());
	if (p) {
	    p->group(0);
	    if (p != static_cast<RTPProcessor*>(l->get()))
		continue;
	}
	l = l->next();
    }
    m_processors.clear();
    unlock();
}