perf ui: Improve handling sigwinch a bit
No need to unblock it at each ui__getch() and also allow other users to
check if a resize is needed, or force an refresh of terminal dimensions.
The 'force' one shouldn't be needed, but its in a slow path, so leave it
like that for now, I'll revisit this another day.
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-aujchu6yx3bfy64non1rky0w@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/ui/browser.c b/tools/perf/util/ui/browser.c
index 5359f37..370c470 100644
--- a/tools/perf/util/ui/browser.c
+++ b/tools/perf/util/ui/browser.c
@@ -4,6 +4,7 @@
#include "libslang.h"
#include <newt.h>
#include "ui.h"
+#include "util.h"
#include <linux/compiler.h>
#include <linux/list.h>
#include <linux/rbtree.h>
@@ -291,53 +292,10 @@
browser->seek(browser, browser->top_idx, SEEK_SET);
}
-static int ui__getch(int delay_secs)
-{
- struct timeval timeout, *ptimeout = delay_secs ? &timeout : NULL;
- fd_set read_set;
- int err, key;
-
- FD_ZERO(&read_set);
- FD_SET(0, &read_set);
-
- if (delay_secs) {
- timeout.tv_sec = delay_secs;
- timeout.tv_usec = 0;
- }
-
- err = select(1, &read_set, NULL, NULL, ptimeout);
-
- if (err == 0)
- return K_TIMER;
-
- if (err == -1) {
- if (errno == EINTR)
- return K_RESIZE;
- return K_ERROR;
- }
-
- key = SLang_getkey();
- if (key != K_ESC)
- return key;
-
- FD_ZERO(&read_set);
- FD_SET(0, &read_set);
- timeout.tv_sec = 0;
- timeout.tv_usec = 20;
- err = select(1, &read_set, NULL, NULL, &timeout);
- if (err == 0)
- return K_ESC;
-
- SLang_ungetkey(key);
- return SLkp_getkey();
-}
-
int ui_browser__run(struct ui_browser *self, int delay_secs)
{
int err, key;
- pthread__unblock_sigwinch();
-
while (1) {
off_t offset;
@@ -351,10 +309,7 @@
key = ui__getch(delay_secs);
if (key == K_RESIZE) {
- pthread_mutex_lock(&ui__lock);
- SLtt_get_screen_size();
- SLsmg_reinit_smg();
- pthread_mutex_unlock(&ui__lock);
+ ui__refresh_dimensions(false);
ui_browser__refresh_dimensions(self);
__ui_browser__show_title(self, self->title);
ui_helpline__puts(self->helpline);