122 строки
3.6 KiB
C
122 строки
3.6 KiB
C
/*
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* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2005 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#include "ompi_config.h"
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#include <stdlib.h>
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#include <string.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <errno.h>
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#ifdef HAVE_SYS_FCNTL_H
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#include <sys/fcntl.h>
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#endif
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#ifdef HAVE_NETINET_IN_H
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#include <netinet/in.h>
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#endif
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#include "opal/util/output.h"
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#include "mca/oob/base/base.h"
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#include "mca/iof/base/base.h"
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#include "mca/iof/base/iof_base_endpoint.h"
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#include "mca/iof/base/iof_base_fragment.h"
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/**
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* timer callback out of the event loop
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*/
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static void orte_iof_base_timer_cb(int fd, short flags, void *cbdata)
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{
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int *flushed = (int*)cbdata;
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OPAL_THREAD_LOCK(&orte_iof_base.iof_lock);
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*flushed = 1;
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opal_condition_signal(&orte_iof_base.iof_condition);
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OPAL_THREAD_UNLOCK(&orte_iof_base.iof_lock);
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}
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/*
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* flush output streams and block until there is no pending I/O
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* on any of the current endpoints.
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*/
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int orte_iof_base_flush(void)
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{
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opal_list_item_t* item;
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opal_event_t ev;
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struct timeval tv = { 0, 0 };
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int flushed = 0;
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size_t pending;
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static int32_t lock = 0;
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if(OPAL_THREAD_ADD32(&lock,1) > 1) {
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OPAL_THREAD_ADD32(&lock,-1);
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return ORTE_SUCCESS;
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}
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/* flush any pending output */
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fflush(NULL);
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/* force all file descriptors to be progressed at least once,
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* wait on a timer callback to be called out of the event loop
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*/
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if(opal_event_progress_thread() == false) {
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OPAL_THREAD_LOCK(&orte_iof_base.iof_lock);
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opal_evtimer_set(&ev, orte_iof_base_timer_cb, &flushed);
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opal_event_add(&ev, &tv);
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while(0 == flushed) {
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opal_condition_wait(&orte_iof_base.iof_condition, &orte_iof_base.iof_lock);
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}
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} else {
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opal_event_loop(OPAL_EVLOOP_NONBLOCK);
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OPAL_THREAD_LOCK(&orte_iof_base.iof_lock);
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}
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orte_iof_base.iof_waiting++;
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/* wait for all of the endpoints to reach an idle state */
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pending = opal_list_get_size(&orte_iof_base.iof_endpoints);
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while(pending > 0) {
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pending = 0;
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for(item = opal_list_get_first(&orte_iof_base.iof_endpoints);
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item != opal_list_get_end(&orte_iof_base.iof_endpoints);
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item = opal_list_get_next(item)) {
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orte_iof_base_endpoint_t* endpoint = (orte_iof_base_endpoint_t*)item;
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if(orte_iof_base_endpoint_pending(endpoint)) {
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pending++;
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}
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}
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if(pending != 0) {
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if(opal_event_progress_thread() == false) {
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opal_condition_wait(&orte_iof_base.iof_condition, &orte_iof_base.iof_lock);
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} else {
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OPAL_THREAD_UNLOCK(&orte_iof_base.iof_lock);
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opal_event_loop(OPAL_EVLOOP_ONCE);
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OPAL_THREAD_LOCK(&orte_iof_base.iof_lock);
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}
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}
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}
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orte_iof_base.iof_waiting--;
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OPAL_THREAD_UNLOCK(&orte_iof_base.iof_lock);
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OPAL_THREAD_ADD32(&lock,-1);
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return OMPI_SUCCESS;
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}
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