1fe4406f37
b9e0ea0 Merge commit '7fa9d8bdea3773d1195b04d98fcf27cf48ddd81d' as 'tool/mbed/mbed-sdk' 7fa9d8b Squashed 'tool/mbed/mbed-sdk/' content from commit 7c21ce5 git-subtree-dir: tmk_core git-subtree-split: b9e0ea08cb940de20b3610ecdda18e9d8cd7c552
61 lines
2.2 KiB
C++
61 lines
2.2 KiB
C++
/* mbed Microcontroller Library
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* Copyright (c) 2006-2012 ARM Limited
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef SEMAPHORE_H
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#define SEMAPHORE_H
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#include <stdint.h>
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#include "cmsis_os.h"
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namespace rtos {
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/** The Semaphore class is used to manage and protect access to a set of shared resources. */
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class Semaphore {
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public:
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/** Create and Initialize a Semaphore object used for managing resources.
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@param number of available resources; maximum index value is (count-1).
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*/
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Semaphore(int32_t count);
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/** Wait until a Semaphore resource becomes available.
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@param millisec timeout value or 0 in case of no time-out. (default: osWaitForever).
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@return number of available tokens, or -1 in case of incorrect parameters
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*/
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int32_t wait(uint32_t millisec=osWaitForever);
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/** Release a Semaphore resource that was obtain with Semaphore::wait.
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@return status code that indicates the execution status of the function.
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*/
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osStatus release(void);
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~Semaphore();
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private:
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osSemaphoreId _osSemaphoreId;
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osSemaphoreDef_t _osSemaphoreDef;
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#ifdef CMSIS_OS_RTX
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uint32_t _semaphore_data[2];
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#endif
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};
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}
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#endif
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