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| author | Remko Tronçon <git@el-tramo.be> | 2009-12-03 20:06:33 (GMT) |
|---|---|---|
| committer | Remko Tronçon <git@el-tramo.be> | 2009-12-03 20:06:33 (GMT) |
| commit | 5df50c35e1baeee517a0895a2c8a2cc2052b087f (patch) | |
| tree | b9d90fd123ec251ebb930cfcfaa2ffc805433812 /3rdParty/CAres/src/ares_fds.c | |
| parent | 9b3edba27b8683f1a87ad66ee05802dd93bbbdfc (diff) | |
| download | swift-5df50c35e1baeee517a0895a2c8a2cc2052b087f.zip swift-5df50c35e1baeee517a0895a2c8a2cc2052b087f.tar.bz2 | |
Added C-Ares.
Diffstat (limited to '3rdParty/CAres/src/ares_fds.c')
| -rw-r--r-- | 3rdParty/CAres/src/ares_fds.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/3rdParty/CAres/src/ares_fds.c b/3rdParty/CAres/src/ares_fds.c new file mode 100644 index 0000000..6ffe9c7 --- /dev/null +++ b/3rdParty/CAres/src/ares_fds.c @@ -0,0 +1,63 @@ +/* $Id: ares_fds.c,v 1.12 2009-11-02 11:55:53 yangtse Exp $ */ + +/* Copyright 1998 by the Massachusetts Institute of Technology. + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting + * documentation, and that the name of M.I.T. not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" + * without express or implied warranty. + */ + +#include "ares_setup.h" + +#ifdef HAVE_SYS_TIME_H +#include <sys/time.h> +#endif + +#include "ares.h" +#include "ares_private.h" + +int ares_fds(ares_channel channel, fd_set *read_fds, fd_set *write_fds) +{ + struct server_state *server; + ares_socket_t nfds; + int i; + + /* Are there any active queries? */ + int active_queries = !ares__is_list_empty(&(channel->all_queries)); + + nfds = 0; + for (i = 0; i < channel->nservers; i++) + { + server = &channel->servers[i]; + /* We only need to register interest in UDP sockets if we have + * outstanding queries. + */ + if (active_queries && server->udp_socket != ARES_SOCKET_BAD) + { + FD_SET(server->udp_socket, read_fds); + if (server->udp_socket >= nfds) + nfds = server->udp_socket + 1; + } + /* We always register for TCP events, because we want to know + * when the other side closes the connection, so we don't waste + * time trying to use a broken connection. + */ + if (server->tcp_socket != ARES_SOCKET_BAD) + { + FD_SET(server->tcp_socket, read_fds); + if (server->qhead) + FD_SET(server->tcp_socket, write_fds); + if (server->tcp_socket >= nfds) + nfds = server->tcp_socket + 1; + } + } + return (int)nfds; +} |