fflush_unlocked(3)

#include <stdio.h>

int getc_unlocked(FILE *\nstream\n);\n
\nint getchar_unlocked(void);\n
\nint putc_unlocked(int \nc\n, FILE *\nstream\n);\n
\nint putchar_unlocked(int \nc\n);

void clearerr_unlocked(FILE *\nstream\n);\n
\nint feof_unlocked(FILE *\nstream\n);\n
\nint ferror_unlocked(FILE *\nstream\n);\n
\nint fileno_unlocked(FILE *\nstream\n);\n
\nint fflush_unlocked(FILE *_Nullable \nstream\n);

int fgetc_unlocked(FILE *\nstream\n);\n
\nint fputc_unlocked(int \nc\n, FILE *\nstream\n);

size_t fread_unlocked(void \nptr\n[restrict .\nsize\n * .\nn\n],\n
\n                      size_t \nsize\n, size_t \nn\n,\n
\n                      FILE *restrict \nstream\n);\n
\nsize_t fwrite_unlocked(const void \nptr\n[restrict .\nsize\n * .\nn\n],\n
\n                      size_t \nsize\n, size_t \nn\n,\n
\n                      FILE *restrict \nstream\n);

char *fgets_unlocked(char \ns\n[restrict .\nn\n], int \nn\n, FILE *restrict \nstream\n);\n
\nint fputs_unlocked(const char *restrict \ns\n, FILE *restrict \nstream\n);

#include <wchar.h>

wint_t getwc_unlocked(FILE *\nstream\n);\n
\nwint_t getwchar_unlocked(void);\n
\nwint_t fgetwc_unlocked(FILE *\nstream\n);

wint_t fputwc_unlocked(wchar_t \nwc\n, FILE *\nstream\n);\n
\nwint_t putwc_unlocked(wchar_t \nwc\n, FILE *\nstream\n);\n
\nwint_t putwchar_unlocked(wchar_t \nwc\n);

wchar_t *fgetws_unlocked(wchar_t \nws\n[restrict .\nn\n], int \nn\n,\n
\n                      FILE *restrict \nstream\n);\n
\nint fputws_unlocked(const wchar_t *restrict \nws\n,\n
\n                      FILE *restrict \nstream\n);

\n
    /* glibc >= 2.24: */ _POSIX_C_SOURCE >= 199309L
\n
        || /* glibc <= 2.23: */ _POSIX_C_SOURCE
\n
        || /* glibc <= 2.19: */ _SVID_SOURCE || _BSD_SOURCE

\n
    /* glibc >= 2.19: */ _DEFAULT_SOURCE
\n
        || /* glibc <= 2.19: */ _SVID_SOURCE || _BSD_SOURCE

\n
    _GNU_SOURCE