The Tor Browser: ipc/chromium/src/third_party/libevent/evmap-internal.h@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /*

     2  * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson

     3  *

     4  * Redistribution and use in source and binary forms, with or without

     5  * modification, are permitted provided that the following conditions

     6  * are met:

     7  * 1. Redistributions of source code must retain the above copyright

     8  *    notice, this list of conditions and the following disclaimer.

     9  * 2. Redistributions in binary form must reproduce the above copyright

    10  *    notice, this list of conditions and the following disclaimer in the

    11  *    documentation and/or other materials provided with the distribution.

    12  * 3. The name of the author may not be used to endorse or promote products

    13  *    derived from this software without specific prior written permission.

    14  *

    15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR

    16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

    17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

    18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,

    19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

    20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

    21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

    22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

    23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

    24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    25  */

    26 #ifndef _EVMAP_H_

    27 #define _EVMAP_H_

    29 /** @file evmap-internal.h

    30  *

    31  * An event_map is a utility structure to map each fd or signal to zero or

    32  * more events.  Functions to manipulate event_maps should only be used from

    33  * inside libevent.  They generally need to hold the lock on the corresponding

    34  * event_base.

    35  **/

    37 struct event_base;

    38 struct event;

    40 /** Initialize an event_map for use.

    41  */

    42 void evmap_io_initmap(struct event_io_map* ctx);

    43 void evmap_signal_initmap(struct event_signal_map* ctx);

    45 /** Remove all entries from an event_map.

    47 	@param ctx the map to clear.

    48  */

    49 void evmap_io_clear(struct event_io_map* ctx);

    50 void evmap_signal_clear(struct event_signal_map* ctx);

    52 /** Add an IO event (some combination of EV_READ or EV_WRITE) to an

    53     event_base's list of events on a given file descriptor, and tell the

    54     underlying eventops about the fd if its state has changed.

    56     Requires that ev is not already added.

    58     @param base the event_base to operate on.

    59     @param fd the file descriptor corresponding to ev.

    60     @param ev the event to add.

    61 */

    62 int evmap_io_add(struct event_base *base, evutil_socket_t fd, struct event *ev);

    63 /** Remove an IO event (some combination of EV_READ or EV_WRITE) to an

    64     event_base's list of events on a given file descriptor, and tell the

    65     underlying eventops about the fd if its state has changed.

    67     @param base the event_base to operate on.

    68     @param fd the file descriptor corresponding to ev.

    69     @param ev the event to remove.

    70  */

    71 int evmap_io_del(struct event_base *base, evutil_socket_t fd, struct event *ev);

    72 /** Active the set of events waiting on an event_base for a given fd.

    74     @param base the event_base to operate on.

    75     @param fd the file descriptor that has become active.

    76     @param events a bitmask of EV_READ|EV_WRITE|EV_ET.

    77 */

    78 void evmap_io_active(struct event_base *base, evutil_socket_t fd, short events);

    81 /* These functions behave in the same way as evmap_io_*, except they work on

    82  * signals rather than fds.  signals use a linear map everywhere; fds use

    83  * either a linear map or a hashtable. */

    84 int evmap_signal_add(struct event_base *base, int signum, struct event *ev);

    85 int evmap_signal_del(struct event_base *base, int signum, struct event *ev);

    86 void evmap_signal_active(struct event_base *base, evutil_socket_t signum, int ncalls);

    88 void *evmap_io_get_fdinfo(struct event_io_map *ctx, evutil_socket_t fd);

    90 void evmap_check_integrity(struct event_base *base);

    92 #endif /* _EVMAP_H_ */

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