text: /*
  ;    Project:       Open Vehicle Monitor System
  ;    Date:          14th March 2017
  ;
  ;    Changes:
  ;    1.0  Initial release
  ;
  ;    (C) 2011       Michael Stegen / Stegen Electronics
  ;    (C) 2011-2017  Mark Webb-Johnson
  ;    (C) 2011        Sonny Chen @ EPRO/DX
  ;    (C) 2018       Michael Balzer
  ;
  ; Permission is hereby granted, free of charge, to any person obtaining a copy
  ; of this software and associated documentation files (the "Software"), to deal
  ; in the Software without restriction, including without limitation the rights
  ; to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  ; copies of the Software, and to permit persons to whom the Software is
  ; furnished to do so, subject to the following conditions:
  ;
  ; The above copyright notice and this permission notice shall be included in
  ; all copies or substantial portions of the Software.
  ;
  ; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  ; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  ; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  ; AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  ; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  ; OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  ; THE SOFTWARE.
  */
  
  #ifndef __OVMS_SEMAPHORE_H__
  #define __OVMS_SEMAPHORE_H__
  
  #include "freertos/FreeRTOS.h"
  #include "freertos/task.h"
  #include "freertos/queue.h"
  #include <freertos/semphr.h>
  
  class OvmsSemaphore
    {
    public:
      OvmsSemaphore(int maxcount=1, int initcount=0);
      ~OvmsSemaphore();
  
    public:
      bool Take(TickType_t timeout = portMAX_DELAY);
      void Give();
      bool IsAvail();
      int GetCount();
  
    protected:
      QueueHandle_t m_semaphore;
    };
  
  #endif //#ifndef __OVMS_MUTEX_H__
  