mutexattr_t
int __libc_mutex_init(mutex_t *, const mutexattr_t *);
int __libc_mutexattr_init(mutexattr_t *);
int __libc_mutexattr_settype(mutexattr_t *, int);
int __libc_mutexattr_destroy(mutexattr_t *);
int __libc_mutex_init_stub(mutex_t *, const mutexattr_t *);
int __libc_mutexattr_init_stub(mutexattr_t *);
int __libc_mutexattr_destroy_stub(mutexattr_t *);
int __libc_mutexattr_settype_stub(mutexattr_t *, int);
mutexattr_t atexit_mutex_attr;
int __libc_mutexattr_catchall_stub(mutexattr_t *);
__libc_mutex_init_stub(mutex_t *m, const mutexattr_t *a)
__libc_mutexattr_settype_stub(mutexattr_t *ma, int type)
__libc_mutexattr_catchall_stub(mutexattr_t *ma)