Perhaps I do not understand the use of the P99 library , but what advantages does it give with respect to C11 (mainly regarding multithreading), if anything more than an emulator.
Speed? Efficiency?
Or just backward compatibility?
The main advantage that it provides for C11 is that it works with C99 compilers. Support for C11 does not yet exist. It also provides many features that are not found on C11.