8 #define FSETLOCKING_QUERY 0
9 #define FSETLOCKING_INTERNAL 1
10 #define FSETLOCKING_BYCALLER 2
13 int __fsetlocking(FILE *, int);
14 int __fwriting(FILE *);
15 int __freading(FILE *);
16 int __freadable(FILE *);
17 int __fwritable(FILE *);
19 size_t __fbufsize(FILE *);
20 size_t __fpending(FILE *);