ui_out_table: Replace boolean flag with enum

[deliverable/binutils-gdb.git] / gdb / top.h

diff --git a/gdb/top.h b/gdb/top.h
index 009fdb75e8c6d50fcfedf46553e90499d4a2e7aa..482ed3efe9be40b42f9fc342b987c9aa90333fcb 100644 (file)
--- a/gdb/top.h
+++ b/gdb/top.h
@@ -25,6 +25,24 @@
 
 struct tl_interp_info;
 
+/* Prompt state.  */
+
+enum prompt_state
+{
+  /* The command line is blocked simulating synchronous execution.
+     This is used to implement the foreground execution commands
+     ('run', 'continue', etc.).  We won't display the prompt and
+     accept further commands until the execution is actually over.  */
+  PROMPT_BLOCKED,
+
+  /* The command finished; display the prompt before returning back to
+     the top level.  */
+  PROMPT_NEEDED,
+
+  /* We've displayed the prompt already, ready for input.  */
+  PROMPTED,
+};
+
 /* All about a user interface instance.  Each user interface has its
    own I/O files/streams, readline state, its own top level
    interpreter (for the main UI, this is the interpreter specified
@@ -39,6 +57,9 @@ struct ui
   /* Pointer to next in singly-linked list.  */
   struct ui *next;
 
+  /* Convenient handle (UI number).  Unique across all UIs.  */
+  int num;
+
   /* The UI's command line buffer.  This is to used to accumulate
      input until we have a whole command line.  */
   struct buffer line_buffer;
@@ -73,6 +94,13 @@ struct ui
      "start" -ex "next"') are processed.  */
   int async;
 
+  /* The number of nested readline secondary prompts that are
+     currently active.  */
+  int secondary_prompt_depth;
+
+  /* The UI's stdin.  Set to stdin for the main UI.  */
+  FILE *stdin_stream;
+
   /* stdio stream that command input is being read from.  Set to stdin
      normally.  Set by source_command to the file we are sourcing.
      Set to NULL if we are executing a user-defined command or
@@ -87,6 +115,14 @@ struct ui
      it with the event loop.  */
   int input_fd;
 
+  /* Whether ISATTY returns true on input_fd.  Cached here because
+     quit_force needs to know this _after_ input_fd might be
+     closed.  */
+  int input_interactive_p;
+
+  /* See enum prompt_state's description.  */
+  enum prompt_state prompt_state;
+
   /* The fields below that start with "m_" are "private".  They're
      meant to be accessed through wrapper macros that make them look
      like globals.  */
@@ -119,30 +155,66 @@ extern struct ui *current_ui;
 /* The list of all UIs.  */
 extern struct ui *ui_list;
 
-/* State for SWITCH_THRU_ALL_UIS.  Declared here because it is meant
-   to be created on the stack, but should be treated as opaque.  */
-struct switch_thru_all_uis
+/* State for SWITCH_THRU_ALL_UIS.  */
+class switch_thru_all_uis
 {
-  struct ui *iter;
-  struct cleanup *old_chain;
+public:
+
+  switch_thru_all_uis () : m_iter (ui_list), m_save_ui (&current_ui)
+  {
+    current_ui = ui_list;
+  }
+
+  /* If done iterating, return true; otherwise return false.  */
+  bool done () const
+  {
+    return m_iter == NULL;
+  }
+
+  /* Move to the next UI, setting current_ui if iteration is not yet
+     complete.  */
+  void next ()
+  {
+    m_iter = m_iter->next;
+    if (m_iter != NULL)
+      current_ui = m_iter;
+  }
+
+ private:
+
+  /* No need for these.  They are intentionally not defined
+     anywhere.  */
+  switch_thru_all_uis &operator= (const switch_thru_all_uis &);
+  switch_thru_all_uis (const switch_thru_all_uis &);
+
+  /* Used to iterate through the UIs.  */
+  struct ui *m_iter;
+
+  /* Save and restore current_ui.  */
+  scoped_restore_tmpl<struct ui *> m_save_ui;
 };
 
-/* Functions to drive SWITCH_THRU_ALL_UIS.  Though declared here by
-   necessity, these functions should not be used other than via the
-   SWITCH_THRU_ALL_UIS macro defined below.  */
-extern void switch_thru_all_uis_init (struct switch_thru_all_uis *state);
-extern int switch_thru_all_uis_cond (struct switch_thru_all_uis *state);
-extern void switch_thru_all_uis_next (struct switch_thru_all_uis *state);
-
   /* Traverse through all UI, and switch the current UI to the one
      being iterated.  */
-#define SWITCH_THRU_ALL_UIS(STATE)             \
-  for (switch_thru_all_uis_init (&STATE);              \
-       switch_thru_all_uis_cond (&STATE);              \
-       switch_thru_all_uis_next (&STATE))
+#define SWITCH_THRU_ALL_UIS()          \
+  for (switch_thru_all_uis stau_state; !stau_state.done (); stau_state.next ())
+
+/* Traverse over all UIs.  */
+#define ALL_UIS(UI)                            \
+  for (UI = ui_list; UI; UI = UI->next)                \
+
+/* Create a new UI.  */
+extern struct ui *new_ui (FILE *instream, FILE *outstream, FILE *errstream);
+extern void delete_ui (struct ui *todel);
+
+/* Cleanup that deletes a UI.  */
+extern struct cleanup *make_delete_ui_cleanup (struct ui *ui);
+
+/* Register the UI's input file descriptor in the event loop.  */
+extern void ui_register_input_event_handler (struct ui *ui);
 
-/* Cleanup that restores the current UI.  */
-extern void restore_ui_cleanup (void *data);
+/* Unregister the UI's input file descriptor from the event loop.  */
+extern void ui_unregister_input_event_handler (struct ui *ui);
 
 /* From top.c.  */
 extern char *saved_command_line;
@@ -159,7 +231,7 @@ extern void read_command_file (FILE *);
 extern void init_history (void);
 extern void command_loop (void);
 extern int quit_confirm (void);
-extern void quit_force (char *, int);
+extern void quit_force (int *, int);
 extern void quit_command (char *, int);
 extern void quit_cover (void);
 extern void execute_command (char *, int);
@@ -190,9 +262,10 @@ extern char *get_prompt (void);
    by gdb for its command prompt.  */
 extern void set_prompt (const char *s);
 
-/* Return 1 if the current input handler is a secondary prompt, 0 otherwise.  */
+/* Return 1 if UI's current input handler is a secondary prompt, 0
+   otherwise.  */
 
-extern int gdb_in_secondary_prompt_p (void);
+extern int gdb_in_secondary_prompt_p (struct ui *ui);
 
 /* From random places.  */
 extern int readnow_symbol_files;