#! ./tesh

$ $SG_TEST_EXENV ${bindir:=.}/s4u_mutex
> [Jupiter:worker:(0) 0.000000] [s4u_test/INFO] Hello s4u, I'm ready to compute after a lock_guard
> [Jupiter:worker:(0) 0.000000] [s4u_test/INFO] I'm done, good bye
> [Tremblay:worker:(0) 0.000000] [s4u_test/INFO] Hello s4u, I'm ready to compute after a regular lock
> [Tremblay:worker:(0) 0.000000] [s4u_test/INFO] I'm done, good bye
> [Jupiter:worker:(0) 0.000000] [s4u_test/INFO] Hello s4u, I'm ready to compute after a lock_guard
> [Jupiter:worker:(0) 0.000000] [s4u_test/INFO] I'm done, good bye
> [Tremblay:worker:(0) 0.000000] [s4u_test/INFO] Hello s4u, I'm ready to compute after a regular lock
> [Tremblay:worker:(0) 0.000000] [s4u_test/INFO] I'm done, good bye
> [Jupiter:worker:(0) 0.000000] [s4u_test/INFO] Hello s4u, I'm ready to compute after a lock_guard
> [Jupiter:worker:(0) 0.000000] [s4u_test/INFO] I'm done, good bye
> [Tremblay:worker:(0) 0.000000] [s4u_test/INFO] Hello s4u, I'm ready to compute after a regular lock
> [Tremblay:worker:(0) 0.000000] [s4u_test/INFO] I'm done, good bye
> [Jupiter:worker:(0) 0.000000] [s4u_test/INFO] Hello s4u, I'm ready to compute after a lock_guard
> [Jupiter:worker:(0) 0.000000] [s4u_test/INFO] I'm done, good bye
> [Tremblay:worker:(0) 0.000000] [s4u_test/INFO] Hello s4u, I'm ready to compute after a regular lock
> [Tremblay:worker:(0) 0.000000] [s4u_test/INFO] I'm done, good bye
> [Jupiter:worker:(0) 0.000000] [s4u_test/INFO] Hello s4u, I'm ready to compute after a lock_guard
> [Jupiter:worker:(0) 0.000000] [s4u_test/INFO] I'm done, good bye
> [Tremblay:worker:(0) 0.000000] [s4u_test/INFO] Hello s4u, I'm ready to compute after a regular lock
> [Tremblay:worker:(0) 0.000000] [s4u_test/INFO] I'm done, good bye
> [Jupiter:worker:(0) 0.000000] [s4u_test/INFO] Hello s4u, I'm ready to compute after a lock_guard
> [Jupiter:worker:(0) 0.000000] [s4u_test/INFO] I'm done, good bye
> [Tremblay:worker:(0) 0.000000] [s4u_test/INFO] Hello s4u, I'm ready to compute after a regular lock
> [Tremblay:worker:(0) 0.000000] [s4u_test/INFO] I'm done, good bye
> [Tremblay:main:(0) 10.000000] [s4u_test/INFO] Results is -> 12