gdb: remove uses of iterate_over_inferiors in mi/mi-main.c

Replace with range-based loops.

gdb/ChangeLog:

	* mi/mi-main.c (run_one_inferior): Change return type to void, replace
	`void *` parameter with proper parameters.
	(mi_cmd_exec_run): Use range-based loop to iterate over inferiors.
	(print_one_inferior): Change return type to void, replace `void *`
	parameter with proper parameters.
	(mi_cmd_list_thread_groups): Use range-based loop to iterate over
	inferiors.
	(get_other_inferior): Remove.
	(mi_cmd_remove_inferior): Use range-based loop to iterate over
	inferiors.

2 files changed, 40 insertions, 46 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index c68bc990d04..0d3660249fa 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,18 @@
 2020-01-17  Simon Marchi  <simon.marchi@efficios.com>
 
+	* mi/mi-main.c (run_one_inferior): Change return type to void, replace
+	`void *` parameter with proper parameters.
+	(mi_cmd_exec_run): Use range-based loop to iterate over inferiors.
+	(print_one_inferior): Change return type to void, replace `void *`
+	parameter with proper parameters.
+	(mi_cmd_list_thread_groups): Use range-based loop to iterate over
+	inferiors.
+	(get_other_inferior): Remove.
+	(mi_cmd_remove_inferior): Use range-based loop to iterate over
+	inferiors.
+
+2020-01-17  Simon Marchi  <simon.marchi@efficios.com>
+
 	* mi/mi-interp.c (report_initial_inferior): Remove.
 	(mi_interp::init): Use range-based for to iterate over inferiors.
 
diff --git a/gdb/mi/mi-main.c b/gdb/mi/mi-main.c
index 014feaf6493..d0a3b288744 100644
--- a/gdb/mi/mi-main.c
+++ b/gdb/mi/mi-main.c
@@ -390,17 +390,14 @@ mi_cmd_exec_interrupt (const char *command, char **argv, int argc)
     }
 }
 
-/* Callback for iterate_over_inferiors which starts the execution
-   of the given inferior.
+/* Start the execution of the given inferior.
 
-   ARG is a pointer to an integer whose value, if non-zero, indicates
-   that the program should be stopped when reaching the main subprogram
-   (similar to what the CLI "start" command does).  */
+   START_P indicates whether the program should be stopped when reaching the
+   main subprogram (similar to what the CLI "start" command does).  */
 
-static int
-run_one_inferior (struct inferior *inf, void *arg)
+static void
+run_one_inferior (inferior *inf, bool start_p)
 {
-  int start_p = *(int *) arg;
   const char *run_cmd = start_p ? "start" : "run";
   struct target_ops *run_target = find_run_target ();
   int async_p = mi_async && run_target->can_async_p ();
@@ -417,7 +414,6 @@ run_one_inferior (struct inferior *inf, void *arg)
     switch_to_inferior_no_thread (inf);
   mi_execute_cli_command (run_cmd, async_p,
 			  async_p ? "&" : NULL);
-  return 0;
 }
 
 void
@@ -462,7 +458,8 @@ mi_cmd_exec_run (const char *command, char **argv, int argc)
     {
       scoped_restore_current_pspace_and_thread restore_pspace_thread;
 
-      iterate_over_inferiors (run_one_inferior, &start_p);
+      for (inferior *inf : all_inferiors ())
+	run_one_inferior (inf, start_p);
     }
   else
     {
@@ -633,16 +630,13 @@ struct print_one_inferior_data
   const std::set<int> *inferiors;
 };
 
-static int
-print_one_inferior (struct inferior *inferior, void *xdata)
+static void
+print_one_inferior (struct inferior *inferior, bool recurse,
+		    const std::set<int> &ids)
 {
-  struct print_one_inferior_data *top_data
-    = (struct print_one_inferior_data *) xdata;
   struct ui_out *uiout = current_uiout;
 
-  if (top_data->inferiors->empty ()
-      || (top_data->inferiors->find (inferior->pid)
-	  != top_data->inferiors->end ()))
+  if (ids.empty () || (ids.find (inferior->pid) != ids.end ()))
     {
       struct collect_cores_data data;
       ui_out_emit_tuple tuple_emitter (uiout, NULL);
@@ -675,11 +669,9 @@ print_one_inferior (struct inferior *inferior, void *xdata)
 	    uiout->field_signed (NULL, b);
 	}
 
-      if (top_data->recurse)
+      if (recurse)
 	print_thread_info (uiout, NULL, inferior->pid);
     }
-
-  return 0;
 }
 
 /* Output a field named 'cores' with a list as the value.  The
@@ -853,18 +845,14 @@ mi_cmd_list_thread_groups (const char *command, char **argv, int argc)
     }
   else
     {
-      struct print_one_inferior_data data;
-
-      data.recurse = recurse;
-      data.inferiors = &ids;
-
       /* Local thread groups.  Either no explicit ids -- and we
 	 print everything, or several explicit ids.  In both cases,
 	 we print more than one group, and have to use 'groups'
 	 as the top-level element.  */
       ui_out_emit_list list_emitter (uiout, "groups");
       update_thread_list ();
-      iterate_over_inferiors (print_one_inferior, &data);
+      for (inferior *inf : all_inferiors ())
+	print_one_inferior (inf, recurse, ids);
     }
 }
 
@@ -1719,23 +1707,11 @@ mi_cmd_add_inferior (const char *command, char **argv, int argc)
   current_uiout->field_fmt ("inferior", "i%d", inf->num);
 }
 
-/* Callback used to find the first inferior other than the current
-   one.  */
-
-static int
-get_other_inferior (struct inferior *inf, void *arg)
-{
-  if (inf == current_inferior ())
-    return 0;
-
-  return 1;
-}
-
 void
 mi_cmd_remove_inferior (const char *command, char **argv, int argc)
 {
   int id;
-  struct inferior *inf;
+  struct inferior *inf_to_remove;
 
   if (argc != 1)
     error (_("-remove-inferior should be passed a single argument"));
@@ -1743,18 +1719,23 @@ mi_cmd_remove_inferior (const char *command, char **argv, int argc)
   if (sscanf (argv[0], "i%d", &id) != 1)
     error (_("the thread group id is syntactically invalid"));
 
-  inf = find_inferior_id (id);
-  if (!inf)
+  inf_to_remove = find_inferior_id (id);
+  if (inf_to_remove == NULL)
     error (_("the specified thread group does not exist"));
 
-  if (inf->pid != 0)
+  if (inf_to_remove->pid != 0)
     error (_("cannot remove an active inferior"));
 
-  if (inf == current_inferior ())
+  if (inf_to_remove == current_inferior ())
     {
       struct thread_info *tp = 0;
-      struct inferior *new_inferior
-	= iterate_over_inferiors (get_other_inferior, NULL);
+      struct inferior *new_inferior = NULL;
+
+      for (inferior *inf : all_inferiors ())
+	{
+	  if (inf != inf_to_remove)
+	    new_inferior = inf;
+	}
 
       if (new_inferior == NULL)
 	error (_("Cannot remove last inferior"));
@@ -1769,7 +1750,7 @@ mi_cmd_remove_inferior (const char *command, char **argv, int argc)
       set_current_program_space (new_inferior->pspace);
     }
 
-  delete_inferior (inf);
+  delete_inferior (inf_to_remove);
 }