evf::SlaveQueue Class Reference

#include <SlaveQueue.h>

Public Member Functions
int	id () const
int	post (MsgBuf &ptr)
unsigned long	rcv (MsgBuf &ptr)
unsigned long	rcvNonBlocking (MsgBuf &ptr)
unsigned long	rcvNonBlockingAny (MsgBuf &ptr)
bool	rcvQuiet (MsgBuf &ptr)
	SlaveQueue (unsigned int ind)
	~SlaveQueue ()

Private Attributes
int	queue_id_

Detailed Description

Definition at line 17 of file SlaveQueue.h.

Constructor & Destructor Documentation

SlaveQueue::SlaveQueue

(

unsigned int

ind

)

Definition at line 5 of file SlaveQueue.cc.

References QUEUE_ID, and queue_id_.

                                       :
    queue_id_(0) {

    /* get an (existing) public message queue */
    queue_id_ = msgget(QUEUE_ID + ind, 0);
    if (queue_id_ == -1) {
        XCEPT_RAISE(evf::Exception, "failed to get message queue");
    }
}

SlaveQueue::~SlaveQueue

(

)

Definition at line 15 of file SlaveQueue.cc.

                        {
}

Member Function Documentation

int SlaveQueue::id

(

void

)

const

Definition at line 76 of file SlaveQueue.cc.

References queue_id_.

                         {
    return queue_id_;
}

int SlaveQueue::post

(

MsgBuf &

ptr

)

Definition at line 18 of file SlaveQueue.cc.

References gather_cfg::cout, evf::MsgBuf::msize(), evf::MsgBuf::ptr_, and queue_id_.

Referenced by evf::Vulture::control(), and evf::SubProcess::postSlave().

                                {
    int rc; /* error code retuend by system calls. */
    rc = msgsnd(queue_id_, ptr.ptr_, ptr.msize() + 1, 0);
    //  delete ptr;
    if (rc == -1)
        std::cout << "snd::Slave failed to post message - error:" << strerror(
                errno) << std::endl;
    return rc;
}

unsigned long SlaveQueue::rcv

(

MsgBuf &

ptr

)

Definition at line 28 of file SlaveQueue.cc.

References MSGQ_MESSAGE_TYPE_RANGE, evf::MsgBuf::msize(), MSQS_MESSAGE_TYPE_SLA, evf::MsgBuf::ptr_, and queue_id_.

Referenced by evf::Vulture::control(), and evf::SubProcess::rcvSlave().

                                         {
    unsigned long msg_type = MSQS_MESSAGE_TYPE_SLA;
    int rc = msgrcv(queue_id_, ptr.ptr_, ptr.msize() + 1, -msg_type, 0);
    if (rc == -1 && errno != ENOMSG) {
        std::string serr =
                "rcv::Slave failed to get message from queue - error:";
        serr += strerror(errno);
        XCEPT_RAISE(evf::Exception, serr);
    } else if (rc == -1 && errno == ENOMSG)
        return MSGQ_MESSAGE_TYPE_RANGE;
    return msg_type;
}

unsigned long SlaveQueue::rcvNonBlocking

(

MsgBuf &

ptr

)

Definition at line 49 of file SlaveQueue.cc.

References MSGQ_MESSAGE_TYPE_RANGE, evf::MsgBuf::msize(), MSQS_MESSAGE_TYPE_SLA, evf::MsgBuf::ptr_, and queue_id_.

Referenced by evf::SubProcess::rcvSlaveNonBlocking().

                                                    {
    unsigned long msg_type = MSQS_MESSAGE_TYPE_SLA;
    int rc =
            msgrcv(queue_id_, ptr.ptr_, ptr.msize() + 1, -msg_type, IPC_NOWAIT);
    if (rc == -1 && errno != ENOMSG) {
        std::string serr =
                "rcvnb::Slave failed to get message from queue - error:";
        serr += strerror(errno);
        XCEPT_RAISE(evf::Exception, serr);
    } else if (rc == -1 && errno == ENOMSG)
        return MSGQ_MESSAGE_TYPE_RANGE;
    return msg_type;
}

unsigned long SlaveQueue::rcvNonBlockingAny

(

MsgBuf &

ptr

)

Definition at line 63 of file SlaveQueue.cc.

References MSGQ_MESSAGE_TYPE_RANGE, evf::MsgBuf::msize(), evf::MsgBuf::ptr_, and queue_id_.

                                                       {
    unsigned long msg_type = 0;
    int rc = msgrcv(queue_id_, ptr.ptr_, ptr.msize() + 1, msg_type, IPC_NOWAIT);
    if (rc == -1 && errno != ENOMSG) {
        std::string serr =
                "rcvnb::Slave failed to get message from queue - error:";
        serr += strerror(errno);
        XCEPT_RAISE(evf::Exception, serr);
    } else if (rc == -1 && errno == ENOMSG)
        return MSGQ_MESSAGE_TYPE_RANGE;
    return msg_type;
}

bool SlaveQueue::rcvQuiet

(

MsgBuf &

ptr

)

Definition at line 41 of file SlaveQueue.cc.

References evf::MsgBuf::msize(), evf::MsgBuf::ptr_, and queue_id_.

                                     {
    int rc = msgrcv(queue_id_, ptr.ptr_, ptr.msize() + 1, ptr->mtype, 0);
    if (rc == -1 && errno != ENOMSG) {
        return false;
    }
    return true;
}

Member Data Documentation

int evf::SlaveQueue::queue_id_

private

Definition at line 33 of file SlaveQueue.h.

Referenced by id(), post(), rcv(), rcvNonBlocking(), rcvNonBlockingAny(), rcvQuiet(), and SlaveQueue().