HelenOS sources

mpsc_create       405 uspace/lib/c/generic/async/server.c 	conn->msg_channel = mpsc_create(sizeof(ipc_call_t));
mpsc_create       205 uspace/lib/c/include/fibril_synch.h extern mpsc_t *mpsc_create(size_t);
mpsc_create       205 uspace/lib/posix/include/libc/fibril_synch.h extern mpsc_t *mpsc_create(size_t);
HelenOS homepage, sources at GitHub