mirror of
https://github.com/openvswitch/ovs
synced 2025-10-21 14:49:41 +00:00
43 lines
1.2 KiB
C
43 lines
1.2 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2013 Nicira, Inc.
|
||
|
|
*
|
||
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
* you may not use this file except in compliance with the License.
|
||
|
|
* You may obtain a copy of the License at:
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
* See the License for the specific language governing permissions and
|
||
|
|
* limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef LATCH_H
|
||
|
|
#define LATCH_H 1
|
||
|
|
|
||
|
|
/* A thread-safe, signal-safe, pollable doorbell.
|
||
|
|
*
|
||
|
|
* This is a thin wrapper around a pipe that allows threads to notify each
|
||
|
|
* other that an event has occurred in a signal-safe way */
|
||
|
|
|
||
|
|
#include <stdbool.h>
|
||
|
|
#include "util.h"
|
||
|
|
|
||
|
|
struct latch {
|
||
|
|
int fds[2];
|
||
|
|
};
|
||
|
|
|
||
|
|
void latch_init(struct latch *);
|
||
|
|
void latch_destroy(struct latch *);
|
||
|
|
|
||
|
|
bool latch_poll(struct latch *);
|
||
|
|
void latch_set(struct latch *);
|
||
|
|
|
||
|
|
bool latch_is_set(const struct latch *);
|
||
|
|
void latch_wait(const struct latch *, const char *where);
|
||
|
|
#define latch_wait(latch) latch_wait(latch, SOURCE_LOCATOR)
|
||
|
|
|
||
|
|
#endif /* latch.h */
|