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babd05a6c6
The old EV_FD_SET() macro was confusing, as it would enable receipt but there was no way to indicate that EAGAIN was received, hence the recently added FD_WAIT_* flags. They're not enough as we're still facing a conflict between EV_FD_* and FD_WAIT_*. So let's offer I/O functions what they need to explicitly request polling.
128 lines
2.8 KiB
C
128 lines
2.8 KiB
C
/*
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* include/proto/fd.h
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* File descriptors states.
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*
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* Copyright (C) 2000-2012 Willy Tarreau - w@1wt.eu
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation, version 2.1
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* exclusively.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _PROTO_FD_H
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#define _PROTO_FD_H
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#include <stdio.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <common/config.h>
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#include <types/fd.h>
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/* Deletes an FD from the fdsets, and recomputes the maxfd limit.
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* The file descriptor is also closed.
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*/
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void fd_delete(int fd);
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/* disable the specified poller */
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void disable_poller(const char *poller_name);
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/*
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* Initialize the pollers till the best one is found.
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* If none works, returns 0, otherwise 1.
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* The pollers register themselves just before main() is called.
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*/
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int init_pollers();
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/*
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* Deinitialize the pollers.
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*/
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void deinit_pollers();
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/*
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* Some pollers may lose their connection after a fork(). It may be necessary
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* to create initialize part of them again. Returns 0 in case of failure,
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* otherwise 1. The fork() function may be NULL if unused. In case of error,
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* the the current poller is destroyed and the caller is responsible for trying
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* another one by calling init_pollers() again.
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*/
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int fork_poller();
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/*
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* Lists the known pollers on <out>.
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* Should be performed only before initialization.
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*/
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int list_pollers(FILE *out);
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/*
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* Runs the polling loop
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*/
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void run_poller();
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#define EV_FD_ISSET(fd, ev) (cur_poller.is_set((fd), (ev)))
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/* event manipulation primitives for use by I/O callbacks */
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static inline void fd_want_recv(int fd)
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{
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cur_poller.set(fd, DIR_RD);
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}
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static inline void fd_stop_recv(int fd)
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{
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cur_poller.clr(fd, DIR_RD);
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}
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static inline void fd_poll_recv(int fd)
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{
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cur_poller.wai(fd, DIR_RD);
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}
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static inline void fd_want_send(int fd)
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{
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cur_poller.set(fd, DIR_WR);
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}
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static inline void fd_stop_send(int fd)
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{
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cur_poller.clr(fd, DIR_WR);
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}
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static inline void fd_poll_send(int fd)
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{
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cur_poller.wai(fd, DIR_WR);
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}
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static inline void fd_stop_both(int fd)
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{
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cur_poller.rem(fd);
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}
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/* Prepares <fd> for being polled */
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static inline void fd_insert(int fd)
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{
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fdtab[fd].ev = 0;
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if (fd + 1 > maxfd)
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maxfd = fd + 1;
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}
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#endif /* _PROTO_FD_H */
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/*
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* Local variables:
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* c-indent-level: 8
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* c-basic-offset: 8
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* End:
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*/
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