libbb: use _unlocked variants of stdio I/O.
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/include/libbb.h b/include/libbb.h
index 953bec3..963ae1e 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -160,6 +160,44 @@
#endif
+/* Busybox does not use threads, we can speed up stdio.
+ * But don't define foo to foo_unlocked if foo_unlocked
+ * is a macro (it might be defined back to foo!).
+ */
+#ifndef getc_unlocked
+# undef getc
+# define getc(stream) getc_unlocked(stream)
+#endif
+#ifndef getchar_unlocked
+# undef getchar
+# define getchar() getchar_unlocked()
+#endif
+#ifndef putc_unlocked
+# undef putc
+# define putc(c, stream) putc_unlocked(c, stream)
+#endif
+#ifndef putchar_unlocked
+# undef putchar
+# define putchar(c) putchar_unlocked(c)
+#endif
+#ifndef fgetc_unlocked
+# undef fgetc
+# define fgetc(stream) fgetc_unlocked(stream)
+#endif
+#ifndef fputc_unlocked
+# undef fputc
+# define fputc(c, stream) fputc_unlocked(c, stream)
+#endif
+#ifndef fgets_unlocked
+# undef fgets
+# define fgets(s, n, stream) fgets_unlocked(s, n, stream)
+#endif
+#ifndef fputs_unlocked
+# undef fputs
+# define fputs(s, stream) fputs_unlocked(s, stream)
+#endif
+
+
/* Make all declarations hidden (-fvisibility flag only affects definitions) */
/* (don't include system headers after this until corresponding pop!) */
PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN