Hello,

I would like to get the minimal value of a queue, because I am trying to modify this code https://github.com/Seeed-Studio/Seeed_Arduino_Linechart/blob/master/examples/basic/basic.ino
I thought about writing a for loop with an if loop inside to compare each element but I don't manage to get the value inside the queue. I have tried like the vectors data[i] where data is a std::queue type and i the index.

Does anyone could give me some help?

Best regards,

Alice

Hello,
It work fine if set nb_recs < 40. can you let me know maximum of nb_recs. Thank you

Hi,

Is this library works with esp32 ?

Our process is

1. Using Wire.onReceive to get data from other controller.
2. Push data to queue
3. On the void loop we retrieve the data from queue do a bit manipulation and send to server

Is this process possible ?

how to print all the members of a static queue without deleting them from queue

Hey,

really like your library. Most implementations do not use the word pull , but use the keyword pop.

Could you maybe implement that? I was trying to add an extra function in the header just to call the pull function, but my C++ is not up to par.

Thanks

Hello,

I'm considering this library as a dependency for an application.
Althought I'd prefer to rely on a library which have unit tests.

You can find some links dealing with continuous integration and Arduino
https://github.com/adafruit/travis-ci-arduino
https://www.pololu.com/blog/654/continuous-testing-for-arduino-libraries-using-platformio-and-travis-ci
(they are using http://platformio.org/ )

Kind regards

PS : see also https://docs.travis-ci.com/user/integration/platformio/

https://github.com/platformio/platformio-remote-unit-testing-example

See also https://github.com/mmurdoch/arduinounit/

and discussion at mmurdoch/arduinounit#63

When trying to access the current remaining count or get count for a queue, the getCount() always gives value as 0 and getRemainingCount() always stays at 50. The queue publish and pop are working because they execute corrdinates on an arm running the motors, but the number of coordinates in the queue currently is not accessible.
Since i'm not able to publish the number of coordinates currently in the queue, it is making it difficult to know when to send next list of points.

Hi,

I am using your (slightly modified) library on a project where I am using a FIFO queue. However before adding a new item I need to check if the last item in the queue has the same properties which I am trying to add. If yes I just don't add a new item. I was wondering if a peek_last() method is worth to be added to the main library (considering that with a LIFO queue it might not make much sense to have it)

Best regards

Hi,

Are there limits on the data types that one may use in the Queues created by this library?

Seeing as initialisation of the Queue involves setting the size of members of the Queue I can see it wouldn't be a good idea to use this library with items whose size isn't known at compile (aka an Arduino String).

But how about queueing objects which are members of a class? Fiddling around with your library I can get expected behaviour when queueing ints, etc. But get 'invalid conversion' errors when using the same code with class objects.

Is this behaviour you would expect? I'd appreciate any feedback you may have!

The Arduino IDE probably provides a size_t but plain C++ does not. I think cppQueue.h should include stddef.h to be more self-contained.

I've noticed this problem when including cppQueue.h from a C++ source file instead of an .ino sketch. Compiling with the Arduino IDE gives the following error:

[library path omitted]src/cppQueue.h:37:2: error: 'size_t' does not name a type
  size_t   queue_sz; //!< Size of the full queue
  ^~~~~~

Building with PlatformIO through Deviot for ESP8266.

This is the build error:

/Users/booli/queue_test.ino:52:1: error: 'Queue' does not name a type
Queue sendLogDataQueue(sizeof(Logdata), 24, LIFO, true);
^

Relevant code:

#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
#include <SoftwareSerial.h>
#include <TickerScheduler.h>
#include <time.h>
#include <FS.h>
#include <Queue.h>
#include "SimpleTime.h"
#include "config.h"
#include "credentials.h"

// Solar data variables
float solar_yield = 0;
float consumption_yield = 0;
uint32_t aggregate_tick = 0;

typedef struct { 
    uint32_t    solar;
    uint32_t    consumption;
    char        date_hour[10];
} Logdata;

Queue sendLogDataQueue(sizeof(Logdata), 24, LIFO, true);

void setup() { 
   // stuff
}

void loop () { 
  // stuff 
}

It does work when I put the library directly into my project folder an use "Queue.h"

issue added from #1 Request

Are there any plans to make this library interrupt safe? That is, safe to use the queue when accessing or modifying a queue in an interrupt service and the setup() and loop() functions.

I had some trouble using the SimpleQueue.ino example script, here's SimplerQueue.ino on the off chance it's useful to anyone:

#include <cppQueue.h>

typedef struct strRec {
  char  url[300];
  char  misc1[255];
} Rec;

cppQueue  queue1(sizeof(Rec), 10, LIFO, true); 

void setup() {
  Serial.begin(115200); 
  
  // Put a sample record into the queue
  Rec test = {"http://google.com", "some stuff"};
  queue1.push(&test);

}

void loop() {  

  // iterate through the queue
  while (!queue1.isEmpty())
  {
    Rec rec;
    queue1.pop(&rec);
    Serial.println("There's something in the queue!");
    Serial.println();
    Serial.print(rec.url);
    Serial.print(" ");
    Serial.print(rec.misc1);

    Serial.println();
    String url = rec.url;
    Serial.println("URL = " + url);
    
    Serial.println();
  }   
  delay(1000);
}

Hello First of all thank you very much for your development
I am new about Arduino
I want to "991" string transmit to Queue list , but always only get ‘1’.
This string ''991' has been pushed to Queue through q.push(). in addition, the string data is also read through the q.pop() ,but the read value is '1'.
maybe I'm using pointer incorrectly!
can you give me some help, thanks a lot.

#include <Arduino_BuiltIn.h>

#include<cppQueue.h>
#include<String.h>

#define QueueLength 10

cppQueue q(sizeof(String* ),QueueLength,FIFO,true);

//Crate 5*5 array
int Location[5][5]
{
{0,0,0,0,0},
{0,0,0,0,0},
{0,0,0,0,0},
{0,0,0,0,0},
{0,0,0,0,0}
};

int Step = 0;
int occupied =1;
int Null =0;
String coordinate(2) ;
int x =9;
int y =9;
int StartButton=2;

void setup() {
// put your setup code here, to run once:
Serial.begin(9600);
Location[x][y]=1; //write 1 to strat position
Step=Step+1;
// char Str1 =char(x);
//char Str2 =char(y);
//char Str3 =char(Step);
String Str1;
String * Str2;
Str1.concat (x) ;
Str1.concat (y) ;
Str1.concat (Step) ;

Str2 = &Str1;
q.push(&Str2);

}

void loop() {
//get location from queue list

if (!q.isEmpty())
{
//String snd;
//String Str;
String * Str1;
for(int i=0; i<3; i++)
{

 Serial.println( q.pop(&Str1)); 
     
 }     

delay(500);
}

}

Line 37. Why? queue certainly isnt initialized to ANYTHING at that point.

Hello,

It will be nice to publish Doxygen doc to GitHub pages.
Doc can be updated automatically using Travis.
https://www.google.fr/search?q=deploy+Doxygen+documentation+with+Travis+CI

Kind regards