huangduirong

Results 2 issues of huangduirong

We wish to use the event function of libhv to replace libevent in the openEuler community. However, during verification, we found that the signal event is missing in the event...

This PR mainly adds the signal event function to the event module of libhv. Add two interfaces hsig_add and hsig_del, also add UT test cases corresponding to the event function....