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https://github.com/openvswitch/ovs
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8f3676cfce
Required to expose headers which depend on SOURCE_LOCATOR Signed-off-by: Thomas Graf <tgraf@noironetworks.com> Acked-by: Ben Pfaff <blp@nicira.com>
48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
/*
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* Copyright (c) 2013 Nicira, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef LATCH_H
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#define LATCH_H 1
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/* A thread-safe, signal-safe, pollable doorbell.
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*
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* This is a thin wrapper around a pipe that allows threads to notify each
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* other that an event has occurred in a signal-safe way */
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#include <stdbool.h>
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#include "util.h"
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struct latch {
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#ifndef _WIN32
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int fds[2];
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#else
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HANDLE wevent;
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bool is_set;
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#endif
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};
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void latch_init(struct latch *);
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void latch_destroy(struct latch *);
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bool latch_poll(struct latch *);
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void latch_set(struct latch *);
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bool latch_is_set(const struct latch *);
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void latch_wait_at(const struct latch *, const char *where);
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#define latch_wait(latch) latch_wait_at(latch, OVS_SOURCE_LOCATOR)
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#endif /* latch.h */
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