+struct ustcomm_notify_buf_mapped {
+ char data[USTCOMM_DATA_SIZE];
+};
+
+/* Ensure directory existence, usefull for unix sockets */
+extern int ensure_dir_exists(const char *dir);
+
+/* Create and delete sockets */
+extern struct ustcomm_sock * ustcomm_init_sock(int fd, int epoll_fd,
+ struct list_head *list);
+extern void ustcomm_del_sock(struct ustcomm_sock *sock, int keep_in_epoll);
+
+/* Create and delete named sockets */
+extern struct ustcomm_sock * ustcomm_init_named_socket(const char *name,
+ int epoll_fd);
+extern void ustcomm_del_named_sock(struct ustcomm_sock *sock,
+ int keep_socket_file);
+
+/* Send and receive functions for file descriptors */
+extern int ustcomm_send_fd(int sock, const struct ustcomm_header *header,
+ const char *data, int *fd);
+extern int ustcomm_recv_fd(int sock, struct ustcomm_header *header,
+ char *data, int *fd);
+
+/* Normal send and receive functions */
+extern int ustcomm_send(int sock, const struct ustcomm_header *header,
+ const char *data);
+extern int ustcomm_recv(int sock, struct ustcomm_header *header,
+ char *data);
+
+/* Receive and allocate data, not to be used inside libust */
+extern int ustcomm_recv_alloc(int sock,
+ struct ustcomm_header *header,
+ char **data);
+
+/* Request function, send and receive */
+extern int ustcomm_req(int sock,
+ const struct ustcomm_header *req_header,
+ const char *req_data,
+ struct ustcomm_header *res_header,
+ char *res_data);
+
+extern int ustcomm_request_consumer(pid_t pid, const char *channel);
+extern int ustcomm_connect_app(pid_t pid, int *app_fd);
+extern int ustcomm_connect_path(const char *path, int *connection_fd);
+
+extern int nth_token_is(const char *str, const char *token, int tok_no);
+
+extern char *nth_token(const char *str, int tok_no);
+
+/* String serialising functions, printf straight into a buffer */
+#define USTCOMM_POISON_PTR (void *)0x19831018
+
+extern char * ustcomm_print_data(char *data_field, int field_size,
+ int *offset, const char *format, ...);
+extern char * ustcomm_restore_ptr(char *ptr, char *data_field,
+ int data_field_size);
+
+#define COMPUTE_MSG_SIZE(struct_ptr, offset) \
+ (size_t) (long)(struct_ptr)->data - (long)(struct_ptr) + (offset)
+
+/* Packing and unpacking functions, making life easier */
+extern int ustcomm_pack_trace_info(struct ustcomm_header *header,
+ struct ustcomm_trace_info *trace_inf,
+ const char *trace);
+
+extern int ustcomm_unpack_trace_info(struct ustcomm_trace_info *trace_inf);
+
+extern int ustcomm_pack_channel_info(struct ustcomm_header *header,
+ struct ustcomm_channel_info *ch_inf,
+ const char *trace,
+ const char *channel);
+
+extern int ustcomm_unpack_channel_info(struct ustcomm_channel_info *ch_inf);