Error: using typedef-name 'xTaskGetInfoResult' after 'struct'

[ashleycox]

I'm trying to compile the notification example given in the documentation but am getting the error: "exit status 1 using typedef-name 'xTaskGetInfoResult' after 'struct'". My code is below but all looks correct, can anyone tell me where I'm going wrong? Compiling for an Arduino Nano with IDE 1.8.15.

#include <HeliOS_Arduino.h>

//Our first task checks the state of the mp3 player
void taskA(int id_) {
  /*
     Obtain the task id of task "B" using its friendly name
     since it should not be assumed that task "B" will always
     have a task id of 2.
     Then check the status of the MP3 player
     pass a 4-byte notification containing the player state to the playAudio task
  */
  xTaskNotify(xTaskGetId("TASKB"), 4, "test");
} //end player state function

/*
   Create the second task "B"
*/
void taskB(int id_) {
  /*
     Obtain the notification bytes and value from the xTaskGetInfoResult
     structure by first making a call to the xTaskGetInfo() function call
     using the task's id stored in id_.
  */
  struct xTaskGetInfoResult* res = xTaskGetInfo(id_);
  /* Because xTaskInfo() can return a null pointer, always check
     that the structure's pointer is not null before accessing
     its members.
  */
  if (res) {
    /*
       res->notificationBytes contains the notification bytes
       res->notificationValue contains the notification value
    */
  }
  /* Always call xMemFree() to free the managed memory allocated by
     xTaskGetInfo();
  */
  xMemFree(res);
}

void setup() {
  /*
     xHeliOSSetup() must be the first function call
     made to initialize HeliOS and its data structures
  */
  xHeliOSSetup();

  /*
     Declare and initialize an int to temporarily hold the
     task id.
  */
  int id = 0;

  /*
     Pass the task friendly name and function to xTaskAdd()
     to add the task to HeliOS. xTaskAdd() will return a
     task id greater than zero if the task is added unsuccessfully.
  */
  id = xTaskAdd("TASKA", &taskA);

  /*
     Pass the task id of the task to set its state from stopped
     to running.
  */
  xTaskSart(id);

  /*
     Pass the task friendly name and function to xTaskAdd()
     to add the task to HeliOS. xTaskAdd() will return a
     task id greater than zero if the task is added unsuccessfully.
  */
  id = xTaskAdd("TASKB", &taskB);

  /*
     Pass the task id of the task to set its state from stopped
     to waiting.
  */
  xTaskWait(id);
}

void loop() {
  /*
     Pass control to the the HeliOS scheduler. xHeliOSLoop() should
     be the only code inside the microcontroller project's
     main loop.
  */
  xHeliOSLoop();
}

[ashleycox]

Figured it out. There is an error in the example. Changed struct xTaskGetInfoResult* res = xTaskGetInfo(id); to xTaskGetInfoResult res = xTaskGetInfo(id);