ref: 40177b86bf5108016fc3a275096e44dc4ada5e9c
dir: /sys/src/libc/9sys/privalloc.c/
#include <u.h> #include <libc.h> static Lock privlock; extern void **_privates; extern int _nprivates; void ** privalloc(void) { void **p; lock(&privlock); if(_nprivates > 0) p = &_privates[--_nprivates]; else p = nil; unlock(&privlock); return p; }