Index280 switch function 121-125 symmetric coroutines 39, 40 synchronous code writing 7 syscall ABI 51 system calls (syscalls) 14, 43, 51 System V ABI 98 for x86-64 99-102 T task 8, 27, 28 thread of execution 27 thread pool 72 threads 13, 27 definition 28 OS threads 27 user-level threads 27 versus concurrency 13 timers 266 Tok io 160 U UNIX family 14 user-level threads 28V variables 214 base examples, improving 217-222 base examples, setting up 215-217 W Waker 190 creating 188-190 wepoll 44 Win64 98 Win API 14 Windows 51 raw syscall on 55 Windows API using 58-60 Windows Subsystem for Linux (WSL) 45