/* -*- Mode: C; c-basic-offset:4 ; -*- *//* *  (C) 2001 by Argonne National Laboratory. *      See COPYRIGHT in top-level directory. */#include "mpidi_ch3_impl.h"/*static void update_request(MPID_Request * sreq, void * pkt, MPIDI_msg_sz_t pkt_sz, int nb)*/#undef update_request#define update_request(sreq, pkt, pkt_sz, nb) \{ \    MPIDI_STATE_DECL(MPID_STATE_UPDATE_REQUEST); \    MPIDI_FUNC_ENTER(MPID_STATE_UPDATE_REQUEST); \    /*MPIU_Assert(pkt_sz == sizeof(MPIDI_CH3_Pkt_t));*/ \    sreq->ch.pkt = *(MPIDI_CH3_Pkt_t *) pkt; \    sreq->dev.iov[0].MPID_IOV_BUF = (MPID_IOV_BUF_CAST)((char *) &sreq->ch.pkt + nb); \    sreq->dev.iov[0].MPID_IOV_LEN = pkt_sz - nb; \    sreq->dev.iov_count = 1; \    sreq->ch.iov_offset = 0; \    MPIDI_FUNC_EXIT(MPID_STATE_UPDATE_REQUEST); \}#undef FUNCNAME#define FUNCNAME MPIDI_CH3_iSend#undef FCNAME#define FCNAME MPIDI_QUOTE(FUNCNAME)int MPIDI_CH3_iSend(MPIDI_VC_t * vc, MPID_Request * sreq, void * pkt, MPIDI_msg_sz_t pkt_sz){    int mpi_errno = MPI_SUCCESS;    int complete;    MPIDI_STATE_DECL(MPID_STATE_MPIDI_CH3_ISEND);    MPIDI_FUNC_ENTER(MPID_STATE_MPIDI_CH3_ISEND);    MPIDI_DBG_PRINTF((50, FCNAME, "entering"));#ifdef MPICH_DBG_OUTPUT    if (pkt_sz > sizeof(MPIDI_CH3_Pkt_t))    {	mpi_errno = MPIR_Err_create_code(MPI_SUCCESS, MPIR_ERR_FATAL, FCNAME, __LINE__, MPI_ERR_OTHER, "**arg", 0);	MPIDI_FUNC_EXIT(MPID_STATE_MPIDI_CH3_ISEND);	return mpi_errno;    }#endif    /* The sock channel uses a fixed length header, the size of which is the maximum of all possible packet headers */    pkt_sz = sizeof(MPIDI_CH3_Pkt_t);    MPIDI_DBG_Print_packet((MPIDI_CH3_Pkt_t*)pkt);        if (vc->ch.state == MPIDI_CH3I_VC_STATE_CONNECTED) /* MT */    {	/* Connection already formed.  If send queue is empty attempt to send data, queuing any unsent data. */	if (MPIDI_CH3I_SendQ_empty(vc)) /* MT */	{	    int nb;	    MPIDI_DBG_PRINTF((55, FCNAME, "send queue empty, attempting to write"));	    	    /* MT: need some signalling to lock down our right to use the channel, thus insuring that the progress engine does               also try to write */	    mpi_errno = MPIDI_CH3I_SHM_write(vc, pkt, pkt_sz, &nb);	    if (mpi_errno == MPI_SUCCESS)	    {		MPIDI_DBG_PRINTF((55, FCNAME, "wrote %d bytes", nb));		if (nb == pkt_sz)		{ 		    MPIDI_DBG_PRINTF((55, FCNAME, "write complete %d bytes, calling MPIDI_CH3U_Handle_send_req()", nb));		    /* ssm version: */		    MPIDI_CH3U_Handle_send_req(vc, sreq, &complete);		    if (!complete)		    {			sreq->ch.iov_offset = 0;			MPIDI_CH3I_SendQ_enqueue_head(vc, sreq);			vc->ch.send_active = sreq;		    }		    /*		    MPIDI_CH3I_SendQ_enqueue_head(vc, sreq);		    MPIDI_CH3U_Handle_send_req(vc, sreq);		    if (sreq->dev.iov_count == 0)		    {			if (MPIDI_CH3I_SendQ_head(vc) == sreq)			{			    MPIDI_CH3I_SendQ_dequeue(vc);			}		    }		    */		}		else		{		    MPIDI_DBG_PRINTF((55, FCNAME, "partial write of %d bytes, request enqueued at head", nb));		    update_request(sreq, pkt, pkt_sz, nb);		    MPIDI_CH3I_SendQ_enqueue_head(vc, sreq);		    vc->ch.send_active = sreq;		}	    }	    else	    {		MPIDI_DBG_PRINTF((55, FCNAME, "MPIDI_CH3I_SHM_write failed"));		/* Connection just failed. Mark the request complete and return an error. */		vc->ch.state = MPIDI_CH3I_VC_STATE_FAILED;		/* TODO: Create an appropriate error message based on the return value (rc) */		sreq->status.MPI_ERROR = MPIR_Err_create_code(mpi_errno, MPIR_ERR_FATAL, FCNAME, __LINE__, MPI_ERR_OTHER, "**ssmwrite", 0);		 /* MT -CH3U_Request_complete() performs write barrier */		MPIDI_CH3U_Request_complete(sreq);	    }	}	else	{	    MPIDI_DBG_PRINTF((55, FCNAME, "send queue not empty, enqueuing"));	    update_request(sreq, pkt, pkt_sz, 0);	    MPIDI_CH3I_SendQ_enqueue(vc, sreq);	}    }    else if (vc->ch.state == MPIDI_CH3I_VC_STATE_UNCONNECTED) /* MT */    {	/* Form a new connection, queuing the data so it can be sent later. */	MPIDI_DBG_PRINTF((55, FCNAME, "unconnected.  enqueuing request"));	update_request(sreq, pkt, pkt_sz, 0);	MPIDI_CH3I_SendQ_enqueue(vc, sreq);	mpi_errno = MPIDI_CH3I_VC_post_connect(vc);	if (mpi_errno != MPI_SUCCESS)	{	    mpi_errno = MPIR_Err_create_code(mpi_errno, MPIR_ERR_FATAL, FCNAME, __LINE__, MPI_ERR_OTHER, "**fail", 0);	}    }    else if (vc->ch.state != MPIDI_CH3I_VC_STATE_FAILED)    {	/* Unable to send data at the moment, so queue it for later */	MPIDI_DBG_PRINTF((55, FCNAME, "still connecting.  enqueuing request"));	update_request(sreq, pkt, pkt_sz, 0);	MPIDI_CH3I_SendQ_enqueue(vc, sreq);    }    else    {	/* Connection failed.  Mark the request complete and return an error. */	/* TODO: Create an appropriate error message */	sreq->status.MPI_ERROR = MPI_ERR_INTERN;	/* MT - CH3U_Request_complete() performs write barrier */	MPIDI_CH3U_Request_complete(sreq);    }        MPIDI_DBG_PRINTF((50, FCNAME, "exiting"));    MPIDI_FUNC_EXIT(MPID_STATE_MPIDI_CH3_ISEND);    return mpi_errno;}