MutexRTOS.h

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#pragma once
#include "AudioToolsConfig.h"
#include "AudioTools/Concurrency/Mutex.h"
 
#ifdef ESP32
#  include "freertos/FreeRTOS.h"
#  include "freertos/semphr.h"
#elif defined(__linux__)
#else
#  include "FreeRTOS.h"
#  include "semphr.h"
#endif
 
namespace audio_tools {
 
class MutexRTOS : public MutexBase {
public:
  MutexRTOS() {
    xSemaphore = xSemaphoreCreateBinary();
    unlock();
  }
  virtual ~MutexRTOS() {
    vSemaphoreDelete(xSemaphore);
  }
  void lock() override {
    xSemaphoreTake(xSemaphore, portMAX_DELAY);
  }
  void unlock() override {
    xSemaphoreGive(xSemaphore);
  }
 
protected:
  SemaphoreHandle_t xSemaphore = NULL;
};
 
class MutexRecursiveRTOS : public MutexBase {
public:
  MutexRecursiveRTOS() {
    // the recursive take/give functions need a recursive mutex: with a
    // binary semaphore the first lock() would block forever
    xSemaphore = xSemaphoreCreateRecursiveMutex();
  }
  virtual ~MutexRecursiveRTOS() {
    vSemaphoreDelete(xSemaphore);
  }
  void lock() override {
    xSemaphoreTakeRecursive(xSemaphore, portMAX_DELAY);
  }
  void unlock() override {
    xSemaphoreGiveRecursive(xSemaphore);
  }
 
protected:
  SemaphoreHandle_t xSemaphore = NULL;
};
 
 
using Mutex = MutexRTOS;
 
using MutexRecursive = MutexRecursiveRTOS;
 
 
}