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-rw-r--r--lib/libc/include/libc_private.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/lib/libc/include/libc_private.h b/lib/libc/include/libc_private.h
index f369cc7..d4265e9 100644
--- a/lib/libc/include/libc_private.h
+++ b/lib/libc/include/libc_private.h
@@ -38,6 +38,8 @@
#ifndef _LIBC_PRIVATE_H_
#define _LIBC_PRIVATE_H_
+#include <spinlock.h>
+
/*
* This global flag is non-zero when a process has created one
* or more threads. It is used to avoid calling locking functions
@@ -120,4 +122,10 @@ int _yp_check(char **);
*/
extern const char *__progname;
+/*
+ * This is the lock to make malloc() thread-safe. It is externalized
+ * so that thread libraries can protect malloc across fork().
+ */
+extern spinlock_t *__malloc_lock;
+
#endif /* _LIBC_PRIVATE_H_ */
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