sys/src/libc/9sys/privalloc.c

   1 #include <u.h>
   2 #include <libc.h>
   3
   4 static Lock     privlock;
   5
   6 extern void     **_privates;
   7 extern int      _nprivates;
   8
   9 void **
  10 privalloc(void)
  11 {
  12         void **p;
  13
  14         lock(&privlock);
  15         if(_nprivates > 0)
  16                 p = &_privates[--_nprivates];
  17         else
  18                 p = nil;
  19         unlock(&privlock);
  20
  21         return p;
  22 }