Eliminate clear_quit_flag

Nothing calls this anymore.

gdb/ChangeLog:
2016-04-12  Pedro Alves  <palves@redhat.com>

	* defs.h (clear_quit_flag): Remove declaration.
	* extension-priv.h (struct extension_language_ops)
	<clear_quit_flag>: Remove field and update comments.
	* extension.c (clear_quit_flag): Delete.
	* guile/guile.c (guile_extension_ops): Adjust.
	* python/python.c (python_extension_ops): Adjust.
	(gdbpy_clear_quit_flag): Delete.

6 files changed, 11 insertions, 37 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 46f8668..7f0df5f 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,15 @@
 2016-04-12  Pedro Alves  <palves@redhat.com>
 
+	* defs.h (clear_quit_flag): Remove declaration.
+	* extension-priv.h (struct extension_language_ops)
+	<clear_quit_flag>: Remove field and update comments.
+	* extension.c (clear_quit_flag): Delete.
+	* guile/guile.c (guile_extension_ops): Adjust.
+	* python/python.c (python_extension_ops): Adjust.
+	(gdbpy_clear_quit_flag): Delete.
+
+2016-04-12  Pedro Alves  <palves@redhat.com>
+
 	* main.c (captured_main): Don't clear the quit flag.
 
 2016-04-12  Pedro Alves  <palves@redhat.com>
diff --git a/gdb/defs.h b/gdb/defs.h
index ad9b259..006f660 100644
--- a/gdb/defs.h
+++ b/gdb/defs.h
@@ -139,8 +139,6 @@ extern char *debug_file_directory;
    These functions use the extension_language_ops API to allow extension
    language(s) and GDB SIGINT handling to coexist seamlessly.  */
 
-/* * Clear the quit flag.  */
-extern void clear_quit_flag (void);
 /* * Evaluate to non-zero if the quit flag is set, zero otherwise.  This
    will clear the quit flag as a side effect.  */
 extern int check_quit_flag (void);
diff --git a/gdb/extension-priv.h b/gdb/extension-priv.h
index 5ccbc29..d7bc572 100644
--- a/gdb/extension-priv.h
+++ b/gdb/extension-priv.h
@@ -232,7 +232,7 @@ struct extension_language_ops
   enum ext_lang_bp_stop (*breakpoint_cond_says_stop)
     (const struct extension_language_defn *, struct breakpoint *);
 
-  /* The next three are used to connect GDB's SIGINT handling with the
+  /* The next two are used to connect GDB's SIGINT handling with the
      extension language's.
 
      Terminology: If an extension language can use GDB's SIGINT handling then
@@ -242,9 +242,6 @@ struct extension_language_ops
      These need not be implemented, but if one of them is implemented
      then they all must be.  */
 
-  /* Clear the SIGINT indicator.  */
-  void (*clear_quit_flag) (const struct extension_language_defn *);
-
   /* Set the SIGINT indicator.
      This is called by GDB's SIGINT handler and must be async-safe.  */
   void (*set_quit_flag) (const struct extension_language_defn *);
diff --git a/gdb/extension.c b/gdb/extension.c
index c00db47..17268d6 100644
--- a/gdb/extension.c
+++ b/gdb/extension.c
@@ -794,25 +794,6 @@ restore_active_ext_lang (struct active_ext_lang_state *previous)
   xfree (previous);
 }
 
-/* Clear the quit flag.
-   The flag is cleared in all extension languages,
-   not just the currently active one.  */
-
-void
-clear_quit_flag (void)
-{
-  int i;
-  const struct extension_language_defn *extlang;
-
-  ALL_ENABLED_EXTENSION_LANGUAGES (i, extlang)
-    {
-      if (extlang->ops->clear_quit_flag != NULL)
-	extlang->ops->clear_quit_flag (extlang);
-    }
-
-  quit_flag = 0;
-}
-
 /* Set the quit flag.
    This only sets the flag in the currently active extension language.
    If the currently active extension language does not have cooperative
diff --git a/gdb/guile/guile.c b/gdb/guile/guile.c
index 7352b57..f9481c9 100644
--- a/gdb/guile/guile.c
+++ b/gdb/guile/guile.c
@@ -155,7 +155,6 @@ const struct extension_language_ops guile_extension_ops =
   gdbscm_breakpoint_cond_says_stop,
 
   NULL, /* gdbscm_check_quit_flag, */
-  NULL, /* gdbscm_clear_quit_flag, */
   NULL, /* gdbscm_set_quit_flag, */
 };
 
diff --git a/gdb/python/python.c b/gdb/python/python.c
index 4dff2e6..9c972ec 100644
--- a/gdb/python/python.c
+++ b/gdb/python/python.c
@@ -146,7 +146,6 @@ static enum ext_lang_rc gdbpy_apply_type_printers
    const struct ext_lang_type_printers *, struct type *, char **);
 static void gdbpy_free_type_printers (const struct extension_language_defn *,
 				      struct ext_lang_type_printers *);
-static void gdbpy_clear_quit_flag (const struct extension_language_defn *);
 static void gdbpy_set_quit_flag (const struct extension_language_defn *);
 static int gdbpy_check_quit_flag (const struct extension_language_defn *);
 static enum ext_lang_rc gdbpy_before_prompt_hook
@@ -184,7 +183,6 @@ const struct extension_language_ops python_extension_ops =
   gdbpy_breakpoint_has_cond,
   gdbpy_breakpoint_cond_says_stop,
 
-  gdbpy_clear_quit_flag,
   gdbpy_set_quit_flag,
   gdbpy_check_quit_flag,
 
@@ -270,15 +268,6 @@ ensure_python_env (struct gdbarch *gdbarch,
   return make_cleanup (restore_python_env, env);
 }
 
-/* Clear the quit flag.  */
-
-static void
-gdbpy_clear_quit_flag (const struct extension_language_defn *extlang)
-{
-  /* This clears the flag as a side effect.  */
-  PyOS_InterruptOccurred ();
-}
-
 /* Set the quit flag.  */
 
 static void