76: typedef union
77: {
78:   struct __pthread_mutex_s
79:   {
80:     int __lock;
81:     unsigned int __count;
82:     int __owner;
83: #if __WORDSIZE == 64
84:     unsigned int __nusers;
85: #endif
86:     /* KIND must stay at this position in the structure to maintain
87:        binary compatibility.  */
88:     int __kind;
89: #if __WORDSIZE == 64
90:     int __spins;
91:     __pthread_list_t __list;
92: # define __PTHREAD_MUTEX_HAVE_PREV      1
93: #else
94:     unsigned int __nusers;
95:     __extension__ union
96:     {
97:       int __spins;
98:       __pthread_slist_t __list;
99:     };
100: #endif
101:   } __data;
102:   char __size[__SIZEOF_PTHREAD_MUTEX_T];
103:   long int __align;
104: } pthread_mutex_t;
105: