ref: b75e3b2cf1e4c6282ab474da4a8a4b0636a75e9b dir: /libc/fmtlock.c/
#include <u.h> #include <libc.h> static Lock fmtl; void __fmtlock(void) { lock(&fmtl); } void __fmtunlock(void) { unlock(&fmtl); }