__time_critical_func macro

Indicates a function is time/latency critical and should not run from flash Decorates a function name, such that the function will execute from RAM (assuming it is not inlined into a flash function by the compiler) to avoid possible flash latency. Currently this macro is identical in implementation to `__not_in_flash_func`, however the semantics are distinct and a `__time_critical_func` may in the future be treated more specially to reduce the overhead when calling such function from a flash function. For example a function called my_func taking an int parameter: void __time_critical(my_func)(int some_arg) { The function is placed in the `.time_critical.` linker section \see __not_in_flash_func