Using k_thread's as a part of a class.

[dipakgmx]

I would like to implement an object with the thread object being a part of the class. Using the K_THREAD_STACK_DEFINE results in errors.

A MWE I have, is like this:

class myClass
{
public:
  myClass();

private:
  K_THREAD_STACK_DEFINE(m_stackArea, 1000);

};

But this results in errors during the build:

error: section attribute not allowed for 'm_stackArea'
K_THREAD_STACK_DEFINE(m_stackArea, 1000);

So, how does one go about including the thread as member variable within the class?

[jukkar]

Try to use K_THREAD_STACK_MEMBER that can be embedded within other data structures.

[dipakgmx]

I did come across this macro but wasn't sure, since it mentions something on the lines that this shouldn't be used.

> This is now deprecated, as stacks defined in this way are not usable from user mode. Use K_KERNEL_STACK_MEMBER.

So, now I did test using this macro and it works 👍, but am not sure if this is a long term solution, with the warning about this being deprecated.

One more question, regarding this macro. The docs mention it is very important that any RAM preceding this member not be writable by threads else a stack overflow will lead to silent corruption. How can I ensure this?