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/* |
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* select.C: select(2) socket engine. |
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* |
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* Copyright © 2007 Pippijn van Steenhoven / The Ermyth Team |
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* Rights to this code are as documented in COPYING. |
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* |
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* |
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* Portions of this file were derived from sources bearing the following license: |
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* Rights to this code are documented in doc/pod/license.pod. |
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* Copyright © 2005-2007 Atheme Project (http://www.atheme.org) |
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*/ |
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|
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static char const rcsid[] = "$Id: select.C,v 1.6 2007-09-05 11:23:15 pippijn Exp $"; |
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|
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#include "atheme.h" |
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#include "internal.h" |
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#include "datastream.h" |
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|
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fd_set readfds, writefds; |
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|
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/* |
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* init_socket_queues() |
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* |
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* inputs: |
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* none |
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* |
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* outputs: |
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* none |
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* |
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* side effects: |
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* when using select, we don't need to do anything here. |
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*/ |
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void |
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init_socket_queues (void) |
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{ |
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return; |
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} |
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|
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/* |
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* update_select_sets() |
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* |
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* inputs: |
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* none |
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* |
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* outputs: |
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* none |
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* |
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* side effects: |
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* registered sockets are prepared for the select() loop. |
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*/ |
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static void |
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update_select_sets (void) |
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{ |
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connection_t::list_type::iterator it = connection_t::list.begin (); |
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connection_t::list_type::iterator et = connection_t::list.end (); |
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connection_t *cptr; |
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|
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FD_ZERO (&readfds); |
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FD_ZERO (&writefds); |
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|
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while (it != et) |
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{ |
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cptr = *it; |
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|
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if (cptr->is_connecting ()) |
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FD_SET (cptr->fd, &writefds); |
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|
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else if (cptr->is_listening ()) |
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FD_SET (cptr->fd, &readfds); |
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|
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if (sendq_nonempty (cptr)) |
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FD_SET (cptr->fd, &writefds); |
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|
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else |
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FD_SET (cptr->fd, &readfds); |
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|
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++it; |
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} |
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} |
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|
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/* |
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* connection_t::select() |
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* |
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* inputs: |
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* delay in nanoseconds |
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* |
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* outputs: |
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* none |
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* |
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* side effects: |
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* registered sockets and their associated handlers are acted on. |
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*/ |
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void |
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connection_t::select (time_t delay) |
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{ |
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int sr; |
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connection_t::list_type::iterator it = connection_t::list.begin (); |
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connection_t::list_type::iterator et = connection_t::list.end (); |
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connection_t *cptr; |
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timeval to; |
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|
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update_select_sets (); |
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to.tv_sec = 0; |
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to.tv_usec = delay; |
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|
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if ((sr = select (system_state.maxfd + 1, &readfds, &writefds, NULL, &to)) > 0) |
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{ |
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/* Iterate twice, so we don't touch freed memory if |
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* a connection is closed. |
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* -- jilles */ |
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while (it != et) |
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{ |
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cptr = *it; |
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|
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if (FD_ISSET (cptr->fd, &writefds)) |
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{ |
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if (cptr->is_connecting ()) |
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cptr.callback.connected (cptr); |
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else |
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cptr->write_handler (cptr); |
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} |
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|
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++it; |
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} |
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|
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for (it = connection_t::list.begin (), et = connection_t::list.end (); it != et; ++it) |
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{ |
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cptr = *it; |
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|
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if (FD_ISSET (cptr->fd, &readfds)) |
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{ |
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cptr->read_handler (cptr); |
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} |
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} |
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|
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for (it = connection_t::list.begin (), et = connection_t::list.end (); it != et; ++it) |
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{ |
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cptr = *it; |
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if (cptr->flags & CF_DEAD) |
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cptr->close (); |
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} |
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} |
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else |
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{ |
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if (sr == 0) |
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{ |
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/* select() timed out */ |
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} |
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else if ((sr == -1) && (errno == EINTR)) |
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{ |
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/* some signal interrupted us, restart select() */ |
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} |
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else if (sr == -1) |
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{ |
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return; |
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} |
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} |
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} |
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|
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/* vim:cinoptions=>s,e0,n0,f0,{0,}0,^0,=s,ps,t0,c3,+s,(2s,us,)20,*30,gs,hs |
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* vim:ts=8 |
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* vim:sw=8 |
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* vim:noexpandtab |
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*/ |
