+
+struct private_inferior;
+
+/* GDB represents the state of each program execution with an object
+ called an inferior. An inferior typically corresponds to a process
+ but is more general and applies also to targets that do not have a
+ notion of processes. Each run of an executable creates a new
+ inferior, as does each attachment to an existing process.
+ Inferiors have unique internal identifiers that are different from
+ target process ids. Each inferior may in turn have multiple
+ threads running in it. */
+
+struct inferior
+{
+ /* Pointer to next inferior in singly-linked list of inferiors. */
+ struct inferior *next;
+
+ /* Convenient handle (GDB inferior id). Unique across all
+ inferiors. */
+ int num;
+
+ /* Actual target inferior id, usually, a process id. This matches
+ the ptid_t.pid member of threads of this inferior. */
+ int pid;
+
+ /* See the definition of stop_kind above. */
+ enum stop_kind stop_soon;
+
+ /* Nonzero if this child process was attached rather than
+ forked. */
+ int attach_flag;
+
+ /* What is left to do for an execution command after any thread of
+ this inferior stops. For continuations associated with a
+ specific thread, see `struct thread_info'. */
+ struct continuation *continuations;
+
+ /* Private data used by the target vector implementation. */
+ struct private_inferior *private;
+};
+
+/* Create an empty inferior list, or empty the existing one. */
+extern void init_inferior_list (void);
+
+/* Add an inferior to the inferior list, print a message that a new
+ inferior is found, and return the pointer to the new inferior.
+ Caller may use this pointer to initialize the private inferior
+ data. */
+extern struct inferior *add_inferior (int pid);
+
+/* Same as add_inferior, but don't print new inferior notifications to
+ the CLI. */
+extern struct inferior *add_inferior_silent (int pid);
+
+/* Delete an existing inferior list entry, due to inferior exit. */
+extern void delete_inferior (int pid);
+
+/* Same as delete_inferior, but don't print new inferior notifications
+ to the CLI. */
+extern void delete_inferior_silent (int pid);
+
+/* Delete an existing inferior list entry, due to inferior detaching. */
+extern void detach_inferior (int pid);
+
+/* Get rid of all inferiors. */
+extern void discard_all_inferiors (void);
+
+/* Translate the integer inferior id (GDB's homegrown id, not the system's)
+ into a "pid" (which may be overloaded with extra inferior information). */
+extern int gdb_inferior_id_to_pid (int);
+
+/* Translate a target 'pid' into the integer inferior id (GDB's
+ homegrown id, not the system's). */
+extern int pid_to_gdb_inferior_id (int pid);
+
+/* Boolean test for an already-known pid. */
+extern int in_inferior_list (int pid);
+
+/* Boolean test for an already-known inferior id (GDB's homegrown id,
+ not the system's). */
+extern int valid_inferior_id (int num);
+
+/* Search function to lookup a inferior by target 'pid'. */
+extern struct inferior *find_inferior_pid (int pid);
+
+/* Inferior iterator function.
+
+ Calls a callback function once for each inferior, so long as the
+ callback function returns false. If the callback function returns
+ true, the iteration will end and the current inferior will be
+ returned. This can be useful for implementing a search for a
+ inferior with arbitrary attributes, or for applying some operation
+ to every inferior.
+
+ It is safe to delete the iterated inferior from the callback. */
+extern struct inferior *iterate_over_inferiors (int (*) (struct inferior *,
+ void *),
+ void *);
+
+/* Prints the list of inferiors and their details on UIOUT.
+
+ If REQUESTED_INFERIOR is not -1, it's the GDB id of the inferior
+ that should be printed. Otherwise, all inferiors are printed. */
+extern void print_inferior (struct ui_out *uiout, int requested_inferior);
+
+/* Returns true if the inferior list is not empty. */
+extern int have_inferiors (void);
+
+/* Return a pointer to the current inferior. It is an error to call
+ this if there is no current inferior. */
+extern struct inferior *current_inferior (void);
+
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