/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
-#include <errno.h>
-#include <sys/time.h> /* struct timeval */
-#include <sys/types.h>
-#include <sys/socket.h>
-
+#include "portable.h"
#include "gras/Transport/transport_private.h"
XBT_LOG_EXTERNAL_CATEGORY(transport);
XBT_LOG_DEFAULT_CATEGORY(transport);
-
-
/**
* gras_trp_select:
*
- * Returns the next socket to service having a message awaiting.
+ * Returns the next socket to service because it receives a message.
*
* if timeout<0, we ought to implement the adaptative timeout (FIXME)
*
xbt_error_t errcode;
xbt_dynar_t sockets= gras_socketset_get();
int done = -1;
- double wakeup = gras_os_time() + 1000000*timeout;
+ double wakeup = gras_os_time() + timeout;
double now = 0;
/* nextToService used to make sure socket with high number do not starve */
/* static int nextToService = 0; */
struct timeval tout, *p_tout;
int max_fds=0; /* first arg of select: number of existing sockets */
+ /* but accept() of winsock returns sockets bigger than the limit, so don't bother
+ with this tiny optimisation on BillWare */
fd_set FDS;
int ready; /* return of select: number of socket ready to be serviced */
+ int fd_setsize; /* FD_SETSIZE not always defined. Get this portably */
gras_socket_t sock_iter; /* iterating over all sockets */
int cursor; /* iterating over all sockets */
+
+ /* Compute FD_SETSIZE */
+#ifdef HAVE_SYSCONF
+ fd_setsize = sysconf( _SC_OPEN_MAX );
+#else
+# ifdef HAVE_GETDTABLESIZE
+ fd_setsize = getdtablesize();
+# else
+ fd_setsize = FD_SETSIZE;
+# endif /* !USE_SYSCONF */
+#endif
+
*dst=NULL;
while (done == -1) {
if (timeout > 0) { /* did we timeout already? */
/* construct the set of socket to ear from */
FD_ZERO(&FDS);
+ max_fds = -1;
xbt_dynar_foreach(sockets,cursor,sock_iter) {
if (sock_iter->incoming) {
+ DEBUG1("Considering socket %d for select",sock_iter->sd);
+#ifndef HAVE_WINSOCK_H
if (max_fds < sock_iter->sd)
max_fds = sock_iter->sd;
+#endif
FD_SET(sock_iter->sd, &FDS);
} else {
DEBUG1("Not considering socket %d for select",sock_iter->sd);
}
}
- /* we cannot have more than FD_SETSIZE sockets */
- if (++max_fds > FD_SETSIZE) {
- WARN0("too many open sockets.");
+ if (max_fds == -1) {
+ if (timeout > 0) {
+ DEBUG1("No socket to select onto. Sleep %f sec instead.",timeout);
+ gras_os_sleep(timeout);
+ return timeout_error;
+ } else {
+ DEBUG0("No socket to select onto. Return directly.");
+ return timeout_error;
+ }
+ }
+
+#ifndef HAVE_WINSOCK_H
+ /* we cannot have more than FD_SETSIZE sockets
+ ... but with WINSOCK which returns sockets higher than the limit (killing this optim) */
+ if (++max_fds > fd_setsize && fd_setsize > 0) {
+ WARN1("too many open sockets (%d).",max_fds);
done = 0;
break;
}
+#else
+ max_fds = fd_setsize;
+#endif
if (timeout > 0) {
/* set the timeout */
/* no timeout: good luck! */
p_tout = NULL;
}
-
+
DEBUG1("Selecting over %d socket(s)", max_fds-1);
ready = select(max_fds, &FDS, NULL, NULL, p_tout);
if (ready == -1) {
if ( sock_iter->accepting
&& sock_iter->plugin->socket_accept) {
/* not a socket but an ear. accept on it and serve next socket */
- gras_socket_t accepted;
-
- TRY(sock_iter->plugin->socket_accept(sock_iter,&accepted));
- accepted->raw = sock_iter->raw;
+ gras_socket_t accepted=NULL;
+
+ TRY((sock_iter->plugin->socket_accept)(sock_iter,&accepted));
+ DEBUG2("accepted=%p,&accepted=%p",accepted,&accepted);
+ accepted->meas = sock_iter->meas;
} else {
#if 0
FIXME: this fails of files. quite logical
#endif
/* Got a suited socket ! */
*dst = sock_iter;
+ XBT_OUT;
return no_error;
#if 0
}
}
+ XBT_OUT;
return timeout_error;
}
xbt_error_t gras_trp_sg_setup(gras_trp_plugin_t *plug) {
return mismatch_error;
}
+
