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-/******************************************************************************
-
- Copyright (c) 2009-2012, Intel Corporation
- All rights reserved.
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are met:
-
- 1. Redistributions of source code must retain the above copyright notice,
- this list of conditions and the following disclaimer.
-
- 2. Redistributions in binary form must reproduce the above copyright
- notice, this list of conditions and the following disclaimer in the
- documentation and/or other materials provided with the distribution.
-
- 3. Neither the name of the Intel Corporation nor the names of its
- contributors may be used to endorse or promote products derived from
- this software without specific prior written permission.
-
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- POSSIBILITY OF SUCH DAMAGE.
-
-******************************************************************************/
-
-#ifndef AVBTS_OSSIGNAL_HPP
-#define AVBTS_OSSIGNAL_HPP
-
-/**@file*/
-
-/**
- * @brief Provides a generic interface for OS's locking condition
- */
-class OSCondition {
-private:
- int wait_count;
-public:
- /**
- * @brief Waits until a condition is met
- * @return TRUE after waiting
- */
- virtual bool wait() = 0;
-
- /**
- * @brief Waits for lock
- * @return TRUE after waiting
- */
- virtual bool wait_prelock() = 0;
-
- /**
- * @brief Sends a signal to unblock other threads
- * @return TRUE
- */
- virtual bool signal() = 0;
-
- /**
- * @brief Deletes previously declared flags
- */
- virtual ~OSCondition() = 0;
-protected:
- /**
- * @brief Default constructor. Initializes internal variables
- */
- OSCondition() {
- wait_count = 0;
- };
-
- /**
- * @brief Counts up waiting condition
- * @return void
- */
- void up() {
- ++wait_count;
- }
-
- /**
- * @brief Conds down waiting condition
- * @return void
- */
- void down() {
- --wait_count;
- }
-
- /**
- * @brief Checks if OS is waiting
- * @return TRUE if up counter is greater than zero. FALSE otherwise.
- */
- bool waiting() {
- return wait_count > 0;
- }
-};
-
-inline OSCondition::~OSCondition() { }
-
-/**
- * @brief Provides factory design patter for OS Condition class
- */
-class OSConditionFactory {
-public:
- /**
- * @brief Creates OSCondition class
- * @return Pointer to OSCondition object
- */
- virtual OSCondition *createCondition() const = 0;
-
- /**
- * @brief Destroys OSCondition objects
- */
- virtual ~OSConditionFactory() = 0;
-};
-
-inline OSConditionFactory::~OSConditionFactory() {}
-
-
-#endif