mirror of https://github.com/apache/activemq.git
56 lines
1.6 KiB
C++
56 lines
1.6 KiB
C++
/*
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Licensed to the Apache Software Foundation (ASF) under one
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or more contributor license agreements. See the NOTICE file
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distributed with this work for additional information
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regarding copyright ownership. The ASF licenses this file
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to you under the Apache License, Version 2.0 (the
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"License"); you may not use this file except in compliance
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with the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing,
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software distributed under the License is distributed on an
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"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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KIND, either express or implied. See the License for the
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specific language governing permissions and limitations
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under the License.
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*/
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#ifndef ACTIVEMQ_SEMAPHORE_H
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#define ACTIVEMQ_SEMAPHORE_H
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#include <semaphore.h>
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#include <string>
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namespace ActiveMQ {
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/// Abstraction class for Semaphores
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/**
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This class holds a logical semaphore. Since semaphores don't
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have exactly the same API across platforms, this class is
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provided to keep preprocessor statements out of the rest of the
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code.
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*/
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class Semaphore {
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public:
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/// Constructs a new semaphore
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explicit Semaphore(unsigned int defvalue = 0);
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/// Posts on the semaphore, waking a blocked thread
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void post();
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/// Waits for another thread to post
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void wait();
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~Semaphore();
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private:
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sem_t *sem_;
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static std::string getName_();
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static int counter_;
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};
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};
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#endif // ACTIVEMQ_SEMAPHORE_H
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