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-rw-r--r--include/stdio_ext.h17
1 files changed, 14 insertions, 3 deletions
diff --git a/include/stdio_ext.h b/include/stdio_ext.h
index 31c7a4e7a1..c7b77246b7 100644
--- a/include/stdio_ext.h
+++ b/include/stdio_ext.h
@@ -4,8 +4,19 @@
extern int __fsetlocking_internal (FILE *__fp, int __type) attribute_hidden;
-#ifndef NOT_IN_libc
-# define __fsetlocking(fp, type) INTUSE(__fsetlocking) (fp, type)
-#endif
+#define __fsetlocking(fp, type) \
+ ({ int __result = ((fp->_flags & _IO_USER_LOCK) \
+ ? FSETLOCKING_BYCALLER : FSETLOCKING_INTERNAL); \
+ \
+ if (type != FSETLOCKING_QUERY) \
+ { \
+ fp->_flags &= ~_IO_USER_LOCK; \
+ if (type == FSETLOCKING_BYCALLER) \
+ fp->_flags |= _IO_USER_LOCK; \
+ } \
+ \
+ __result; \
+ })
+
#endif