Does C have an equivalent of std::less from C++?

Does C have an equivalent of std::less from C++?

c pointers undefined-behavior memory-model memory-segmentation

c

Difference between memory_order_consume and memory_order_acquire

c++ c atomic memory-model stdatomic

c

Does Delphi have any equivalent to C's volatile variable?

c multithreading delphi volatile memory-model

c