perf ui: Change fallback policy of setup_browser()

If gtk2 support is not enabled (or failed for some reason) try TUI again
instead of falling directly back to the stdio interface.

Signed-off-by: Namhyung Kim <namhyung.kim@lge.com>
Acked-by: Pekka Enberg <penberg@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1335761711-31403-6-git-send-email-namhyung.kim@lge.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

4 files changed, 16 insertions, 18 deletions

diff --git a/tools/perf/ui/gtk/setup.c b/tools/perf/ui/gtk/setup.c
index 8c3b573e863d..829529957766 100644
--- a/tools/perf/ui/gtk/setup.c
+++ b/tools/perf/ui/gtk/setup.c
@@ -1,9 +1,9 @@
 #include "gtk.h"
 #include "../../util/cache.h"
 
-void perf_gtk__init(bool fallback_to_pager __used)
+int perf_gtk__init(void)
 {
-        gtk_init(NULL, NULL);
+        return gtk_init_check(NULL, NULL) ? 0 : -1;
 }
 
 void perf_gtk__exit(bool wait_for_ok __used)
diff --git a/tools/perf/ui/setup.c b/tools/perf/ui/setup.c
index 98130e099a0d..9f5f888f73e3 100644
--- a/tools/perf/ui/setup.c
+++ b/tools/perf/ui/setup.c
@@ -13,13 +13,14 @@ void setup_browser(bool fallback_to_pager)
 
         switch (use_browser) {
         case 2:
-                perf_gtk__init(fallback_to_pager);
-                break;
-
+                if (perf_gtk__init() == 0)
+                        break;
+                /* fall through */
         case 1:
-                ui__init(fallback_to_pager);
-                break;
-
+                use_browser = 1;
+                if (ui__init() == 0)
+                        break;
+                /* fall through */
         default:
                 if (fallback_to_pager)
                         setup_pager();
diff --git a/tools/perf/ui/tui/setup.c b/tools/perf/ui/tui/setup.c
index 0194cea2ea0e..d33e943ac434 100644
--- a/tools/perf/ui/tui/setup.c
+++ b/tools/perf/ui/tui/setup.c
@@ -100,7 +100,7 @@ static void ui__signal(int sig)
         exit(0);
 }
 
-int ui__init(bool fallback_to_pager __used)
+int ui__init(void)
 {
         int err;
 
diff --git a/tools/perf/util/cache.h b/tools/perf/util/cache.h
index 761d4e998101..cff18c617d13 100644
--- a/tools/perf/util/cache.h
+++ b/tools/perf/util/cache.h
@@ -45,27 +45,24 @@ void setup_browser(bool fallback_to_pager);
 void exit_browser(bool wait_for_ok);
 
 #ifdef NO_NEWT_SUPPORT
-static inline int ui__init(bool fallback_to_pager)
+static inline int ui__init(void)
 {
-        if (fallback_to_pager)
-                setup_pager();
-        return 0;
+        return -1;
 }
 static inline void ui__exit(bool wait_for_ok __used) {}
 #else
-int ui__init(bool fallback_to_pager);
+int ui__init(void);
 void ui__exit(bool wait_for_ok);
 #endif
 
 #ifdef NO_GTK2_SUPPORT
-static inline void perf_gtk__init(bool fallback_to_pager)
+static inline int perf_gtk__init(void)
 {
-        if (fallback_to_pager)
-                setup_pager();
+        return -1;
 }
 static inline void perf_gtk__exit(bool wait_for_ok __used) {}
 #else
-void perf_gtk__init(bool fallback_to_pager);
+int perf_gtk__init(void);
 void perf_gtk__exit(bool wait_for_ok);
 #endif
 #endif /* NO_NEWT_SUPPORT && NO_GTK2_SUPPORT */