318 строки
8.9 KiB
C
318 строки
8.9 KiB
C
/*
|
|
* Copyright (c) 2010 Cisco Systems, Inc. All rights reserved.
|
|
* Copyright (c) 2010 Oracle and/or its affiliates. All rights reserved.
|
|
*/
|
|
#include "opal_config.h"
|
|
#include "opal/constants.h"
|
|
|
|
/* protect common defines */
|
|
#undef PACKAGE_BUGREPORT
|
|
#undef PACKAGE_NAME
|
|
#undef PACKAGE_STRING
|
|
#undef PACKAGE_TARNAME
|
|
#undef PACKAGE_VERSION
|
|
|
|
#include "libevent/config.h"
|
|
|
|
|
|
#ifdef HAVE_SYS_TYPES_H
|
|
#include <sys/types.h>
|
|
#endif
|
|
|
|
|
|
#ifdef WIN32
|
|
#define WIN32_LEAN_AND_MEAN
|
|
#include <windows.h>
|
|
#undef WIN32_LEAN_AND_MEAN
|
|
#endif
|
|
#ifdef HAVE_SYS_TIME_H
|
|
#include <sys/time.h>
|
|
#endif
|
|
#include <sys/queue.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#ifndef WIN32
|
|
#ifdef HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif
|
|
#endif
|
|
#include <errno.h>
|
|
#include <signal.h>
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
#include <time.h>
|
|
|
|
#include "opal/class/opal_object.h"
|
|
#include "opal/threads/mutex.h"
|
|
#include "opal/threads/threads.h"
|
|
#include "opal/util/output.h"
|
|
#include "opal/util/argv.h"
|
|
#include "opal/util/fd.h"
|
|
#include "opal/mca/base/mca_base_param.h"
|
|
|
|
#include "libevent2013.h"
|
|
#include "opal/mca/event/base/base.h"
|
|
|
|
#include "libevent/event.h"
|
|
#include "libevent/event-internal.h"
|
|
|
|
#include "opal/mca/event/event.h"
|
|
|
|
/* copied from event.c */
|
|
#if defined(_EVENT_HAVE_EVENT_PORTS) && _EVENT_HAVE_EVENT_PORTS
|
|
extern const struct eventop evportops;
|
|
#endif
|
|
#if defined(_EVENT_HAVE_SELECT) && _EVENT_HAVE_SELECT
|
|
extern const struct eventop selectops;
|
|
#endif
|
|
#if defined(_EVENT_HAVE_POLL) && _EVENT_HAVE_POLL
|
|
extern const struct eventop pollops;
|
|
#endif
|
|
#if defined(_EVENT_HAVE_EPOLL) && _EVENT_HAVE_EPOLL
|
|
extern const struct eventop epollops;
|
|
#endif
|
|
#if defined(_EVENT_HAVE_WORKING_KQUEUE) && _EVENT_HAVE_WORKING_KQUEUE
|
|
extern const struct eventop kqops;
|
|
#endif
|
|
#if defined(_EVENT_HAVE_DEVPOLL) && _EVENT_HAVE_DEVPOLL
|
|
extern const struct eventop devpollops;
|
|
#endif
|
|
#ifdef WIN32
|
|
extern const struct eventop win32ops;
|
|
#endif
|
|
|
|
/* Array of backends in order of preference. */
|
|
static const struct eventop *eventops[] = {
|
|
#if defined(_EVENT_HAVE_EVENT_PORTS) && _EVENT_HAVE_EVENT_PORTS
|
|
&evportops,
|
|
#endif
|
|
#if defined(_EVENT_HAVE_WORKING_KQUEUE) && _EVENT_HAVE_WORKING_KQUEUE
|
|
&kqops,
|
|
#endif
|
|
#if defined(_EVENT_HAVE_EPOLL) && _EVENT_HAVE_EPOLL
|
|
&epollops,
|
|
#endif
|
|
#if defined(_EVENT_HAVE_DEVPOLL) && _EVENT_HAVE_DEVPOLL
|
|
&devpollops,
|
|
#endif
|
|
#if defined(_EVENT_HAVE_POLL) && _EVENT_HAVE_POLL
|
|
&pollops,
|
|
#endif
|
|
#if defined(_EVENT_HAVE_SELECT) && _EVENT_HAVE_SELECT
|
|
&selectops,
|
|
#endif
|
|
#ifdef WIN32
|
|
&win32ops,
|
|
#endif
|
|
NULL
|
|
};
|
|
|
|
static struct event_config *config=NULL;
|
|
|
|
static void update_event(int fd, short flags, void* arg)
|
|
{
|
|
opal_event_update_t up;
|
|
|
|
/* read the event */
|
|
opal_fd_read(fd, sizeof(opal_event_update_t), &up);
|
|
if (NULL == up.ev) {
|
|
return;
|
|
}
|
|
if (OPAL_EVENT_ADD == up.op) {
|
|
event_add(up.ev, 0);
|
|
} else if (OPAL_EVENT_DEL == up.op) {
|
|
event_del(up.ev);
|
|
}
|
|
return;
|
|
}
|
|
|
|
/* Public function -- not part of the module */
|
|
/* This includes (hopefully) a temporary change
|
|
* to deal with cross-base sync. Specifically,
|
|
* when an event in one base needs to release
|
|
* a condition_wait in another base, we need
|
|
* to "wakeup" the event base in the second base
|
|
* so the condition_wait can be checked
|
|
*/
|
|
opal_event_base_t* opal_event_base_create(void)
|
|
{
|
|
struct event_base *base;
|
|
opal_event_base_t *evbase;
|
|
|
|
base = event_base_new_with_config(config);
|
|
if (NULL == base) {
|
|
/* there is no backend method that does what we want */
|
|
opal_output(0, "No event method available");
|
|
return NULL;
|
|
}
|
|
evbase = (opal_event_base_t*)malloc(sizeof(opal_event_base_t));
|
|
evbase->base = base;
|
|
#ifndef __WINDOWS__
|
|
if (pipe(evbase->update_pipe) < 0) {
|
|
opal_output(0, "Unable to open update pipe");
|
|
free(evbase);
|
|
event_base_free(base);
|
|
return NULL;
|
|
}
|
|
#else
|
|
if (create_socketpair(AF_UNIX, SOCK_STREAM, 0, evbase->update_pipe) == -1) {
|
|
opal_output(0, "Unable to open update socket");
|
|
free(evbase);
|
|
event_base_free(base);
|
|
return NULL;
|
|
}
|
|
#endif
|
|
event_assign(&evbase->update_event, base,
|
|
evbase->update_pipe[0], EV_READ | EV_PERSIST,
|
|
update_event, NULL);
|
|
event_add(&evbase->update_event, 0);
|
|
return evbase;
|
|
}
|
|
|
|
void opal_event_base_finalize(opal_event_base_t *evbase)
|
|
{
|
|
/* delete the wakeup event */
|
|
event_del(&evbase->update_event);
|
|
#ifndef __WINDOWS__
|
|
/* close the pipe */
|
|
close(evbase->update_pipe[0]);
|
|
close(evbase->update_pipe[1]);
|
|
#else
|
|
/* close the socket */
|
|
closesocket(evbase->update_pipe[0]);
|
|
closesocket(evbase->update_pipe[1]);
|
|
#endif
|
|
/* release the base */
|
|
event_base_free(evbase->base);
|
|
/* free the storage */
|
|
free(evbase);
|
|
}
|
|
|
|
int opal_event_init(void)
|
|
{
|
|
char* event_module_include=NULL;
|
|
char **modules=NULL, **includes=NULL;
|
|
bool dumpit=false;
|
|
int i, j;
|
|
const struct eventop** _eventop = eventops;
|
|
char available_eventops[1024] = "none";
|
|
char* help_msg = NULL;
|
|
int position = 0;
|
|
|
|
if (opal_output_get_verbosity(opal_event_base_output) > 4) {
|
|
event_enable_debug_mode();
|
|
event_set_debug_output(true);
|
|
dumpit = true;
|
|
}
|
|
|
|
#if OPAL_EVENT_HAVE_THREAD_SUPPORT
|
|
/* turn on libevent thread safety */
|
|
evthread_use_pthreads ();
|
|
#endif
|
|
|
|
/* Retrieve the upper level specified event system, if any.
|
|
* Default to select() on OS X and poll() everywhere else because
|
|
* various parts of OMPI / ORTE use libevent with pty's. pty's
|
|
* *only* work with select on OS X (tested on Tiger and Leopard);
|
|
* we *know* that both select and poll works with pty's everywhere
|
|
* else we care about (other mechansisms such as epoll *may* work
|
|
* with pty's -- we have not tested comprehensively with newer
|
|
* versions of Linux, etc.). So the safe thing to do is:
|
|
*
|
|
* - On OS X, default to using "select" only
|
|
* - Everywhere else, default to using "poll" only (because poll
|
|
* is more scalable than select)
|
|
*
|
|
* An upper layer may override this setting if it knows that pty's
|
|
* won't be used with libevent. For example, we currently have
|
|
* ompi_mpi_init() set to use "all" (to include epoll and friends)
|
|
* so that the TCP BTL can be a bit more scalable -- because we
|
|
* *know* that MPI apps don't use pty's with libevent.
|
|
* Note that other tools explicitly *do* use pty's with libevent:
|
|
*
|
|
* - orted
|
|
* - orterun (probably only if it launches locally)
|
|
* - ...?
|
|
*/
|
|
|
|
while( NULL != (*_eventop) ) {
|
|
opal_argv_append_nosize(&modules, (*_eventop)->name);
|
|
if( 0 != position ) {
|
|
position += snprintf( available_eventops + position,
|
|
(size_t)(1024 - position),
|
|
", %s", (*_eventop)->name );
|
|
} else {
|
|
position += snprintf( available_eventops + position,
|
|
(size_t)(1024 - position),
|
|
"%s", (*_eventop)->name );
|
|
}
|
|
available_eventops[position] = '\0';
|
|
_eventop++; /* go to the next available eventop */
|
|
}
|
|
asprintf( &help_msg,
|
|
"Comma-delimited list of libevent subsystems "
|
|
"to use (%s -- available on your platform)",
|
|
available_eventops );
|
|
mca_base_param_reg_string_name("opal", "event_include",
|
|
help_msg, false, false,
|
|
#ifdef __APPLE__
|
|
"select",
|
|
#else
|
|
#ifdef __WINDOWS__
|
|
"win32",
|
|
#else
|
|
"poll",
|
|
#endif
|
|
#endif
|
|
&event_module_include);
|
|
|
|
if (dumpit) {
|
|
opal_output(0, "event: available subsystems: %s", available_eventops);
|
|
}
|
|
|
|
free(help_msg); /* release the help message */
|
|
|
|
if (NULL == event_module_include) {
|
|
/* Shouldn't happen, but... */
|
|
event_module_include = strdup("select");
|
|
}
|
|
includes = opal_argv_split(event_module_include,',');
|
|
free(event_module_include);
|
|
|
|
/* get a configuration object */
|
|
config = event_config_new();
|
|
/* cycle thru the available subsystems */
|
|
for (i=0; NULL != modules[i]; i++) {
|
|
/* if this module isn't included in the given ones,
|
|
* then exclude it
|
|
*/
|
|
dumpit = true;
|
|
for (j=0; NULL != includes[j]; j++) {
|
|
if (0 == strcmp("all", includes[j]) ||
|
|
0 == strcmp(modules[i], includes[j])) {
|
|
dumpit = false;
|
|
break;
|
|
}
|
|
}
|
|
if (dumpit) {
|
|
event_config_avoid_method(config, modules[i]);
|
|
}
|
|
}
|
|
opal_argv_free(includes);
|
|
opal_argv_free(modules);
|
|
|
|
return OPAL_SUCCESS;
|
|
}
|
|
|
|
int opal_event_reinit(opal_event_base_t *evbase)
|
|
{
|
|
return event_reinit(evbase->base);
|
|
}
|
|
|
|
struct timeval *opal_event_base_init_common_timeout (opal_event_base_t *evbase,
|
|
struct timeval *tv_in)
|
|
{
|
|
return (struct timeval*)event_base_init_common_timeout (evbase->base, tv_in);
|
|
}
|
|
|