Wemos D1 8266 lite / mini no std::mutex

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1

Hi,

hopefully I have chosen the right Category. If not feel free to move it :slight_smile: .

I am actually porting some ESP32 code to ESP8266 (D1 Mini). Strangely, I can use std::mutex on the ESP32, but I cannot use it on the 8266.

Installed PIO fresh on a VM (latest version) and wrote a very simple example:

platformio.ini:

[env:d1_mini]
platform = espressif8266
board = d1_mini
framework = arduino

main.cpp:

#include <Arduino.h>

#include <mutex>

using std::mutex;

void setup() {}

void loop() {}

Output:

src\main.cpp:5:12: error: 'mutex' has not been declared in 'std'
    5 | using std::mutex;
      |            ^~~~~
*** [.pio\build\d1_mini\src\main.cpp.o] Error 1

I know there is also a mutex of FreeRTOS, but i´d like to stick with the std one, which should be available since C++ 11.
Does someone maybe know the reason why it is not available here, and what to do to fix it?

2

It’s the responsibility of the toolchain creators to provide the mutex. If it doesn’t provide it there’s not much you can do except write wrapper classes / polyfills. Please ask at Arduino-ESP8266: Issues · esp8266/Arduino · GitHub

1 Like
3

Thank you, have opened an issue: