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-rw-r--r--src/stdio/open_memstream.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/src/stdio/open_memstream.c b/src/stdio/open_memstream.c
index c7330abe..9eafdfba 100644
--- a/src/stdio/open_memstream.c
+++ b/src/stdio/open_memstream.c
@@ -77,12 +77,13 @@ FILE *open_memstream(char **bufp, size_t *sizep)
f->seek = ms_seek;
f->close = ms_close;
- if (!libc.threaded) {
- f->lock = -1;
- f->next = libc.ofl_head;
- if (libc.ofl_head) libc.ofl_head->prev = f;
- libc.ofl_head = f;
- }
+ if (!libc.threaded) f->lock = -1;
+
+ OFLLOCK();
+ f->next = libc.ofl_head;
+ if (libc.ofl_head) libc.ofl_head->prev = f;
+ libc.ofl_head = f;
+ OFLUNLOCK();
return f;
}