platform: add CriticalSectionLock

[0xc0170]

Critical section class RAII addition

I realized we dont have it here, and often used C API. This file is based on the class we used to have in core-util module (same thing, no changes, just different location).

cc @pan- @sg- @c1728p9 @bulislaw

[bulislaw]

Does it make sense to wrap it in NonCopyable?

[bulislaw]

We could have simple test for that (and C version) ;) Could you add a ticket to IOTMORF-1036?

[0xc0170]

We could have simple test for that (and C version) ;) Could you add a ticket to IOTMORF-1036?

Created

[pan-]

@bulislaw Would be better if the class was marked as non copyable.

@0xc0170 It might be interesting to add a lock and unlock member function to allows user code to lock and unlock if needed in the middle of an algorithm:

CriticalSectionLock cs_lock;

// part of the algorithm needing the lock. 
// For example finding a value in a shared data structure 

cs_lock.unlock();

// part of the algorithm that can run without the lock
// For example computing a value from the data found.

cs_lock.lock();

// part of the algorithm needing the lock. 
// For example finding adding the result in a shared data structure

[0xc0170]

@pan- Updated

[studavekar]

/morph test

[mbed-bot]

Result: SUCCESS

Your command has finished executing! Here's what you wrote!

/morph test

Output

mbed Build Number: 1184

All builds and test passed!