static member function and thread

[stub]

Several objects of the same class, which contains a static member function,
are created in several threads.

If the said member function is called in the threads concurrently, it must
be made to be thread-safe. For a non-static member function, this should
not be a concern. Is this a correct understanding?

Similarly, for a static member variable, if more than one thread read/write
it, should the accesses of threads be synchronized?

 

[Moonlit]

Hi,

Several objects of the same class, which contains a static member function,
are created in several threads.

If the said member function is called in the threads concurrently, it must
be made to be thread-safe. For a non-static member function, this should
not be a concern. Is this a correct understanding?

Non static/static for methods, only has to do with the fact that for non
static members the 'this' pointer is passed as an extra parameter to the
routine. For the rest there is no difference.

Similarly, for a static member variable, if more than one thread read/write
it, should the accesses of threads be synchronized?

The following for most platforms, but since I don't know every OS/platform
there might be an awkward system around that doesn't comply with the
following.

Usually you should take care that not more than one thread accesses the same
variable for writing/writing or writing/reading (reading/reading should
work. Code itself can be accessed by more than one thread without problems.

You can achieve this by using mutexes, critical sections etc.

Regards, Ron AF Greve