Eliminate immediate_quit

This finally gets rid of immediate_quit (and surrounding
infrustruture), as nothing sets it anymore.

gdb_call_async_signal_handler was only necessary in order to handle
immediate_quit.  We can just call mark_async_signal_handler directly
on all hosts now.

In turn, we can clean up mingw-hdep.c's gdb_select a bit, as
sigint_event / sigint_handler is no longer needed.

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

	* defs.h: Update comments on SIGINT handling.
	(immediate_quit): Delete declaration.
	* event-loop.c (call_async_signal_handler): Delete.
	* event-loop.h (call_async_signal_handler): Delete declaration.
	(mark_async_signal_handler): Update comments.
	(gdb_call_async_signal_handler): Delete declaration.
	* event-top.c (handle_sigint): Call mark_async_signal_handler
	instead of gdb_call_async_signal_handler.
	* exceptions.c (prepare_to_throw_exception): Remove reference to
	immediate_quit.
	(exception_fprintf): Remove comments about immediate_quit.
	* mingw-hdep.c (sigint_event, sigint_handler): Delete.
	(gdb_select): Don't wait on sigint_event.
	(gdb_call_async_signal_handler): Delete.
	(_initialize_mingw_hdep): Delete.
	* posix-hdep.c (gdb_call_async_signal_handler): Delete.
	* utils.c (immediate_quit): Delete.

1 files changed, 0 insertions, 13 deletions

diff --git a/gdb/posix-hdep.c b/gdb/posix-hdep.c
index 90cab8f..e9db576 100644
--- a/gdb/posix-hdep.c
+++ b/gdb/posix-hdep.c
@@ -30,16 +30,3 @@ gdb_select (int n, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
 {
   return select (n, readfds, writefds, exceptfds, timeout);
 }
-
-/* Wrapper for the body of signal handlers.  Nothing special needed on
-   POSIX platforms.  */
-
-void
-gdb_call_async_signal_handler (struct async_signal_handler *handler,
-			       int immediate_p)
-{
-  if (immediate_p)
-    call_async_signal_handler (handler);
-  else
-    mark_async_signal_handler (handler);
-}