1 files changed, 140 insertions, 0 deletions

diff --git a/tools/perf/ui/tui/setup.c b/tools/perf/ui/tui/setup.c
new file mode 100644
index 00000000000..0194cea2ea0
--- /dev/null
+++ b/tools/perf/ui/tui/setup.c
@@ -0,0 +1,140 @@
+#include <newt.h>
+#include <signal.h>
+#include <stdbool.h>
+
+#include "../../util/cache.h"
+#include "../../util/debug.h"
+#include "../browser.h"
+#include "../helpline.h"
+#include "../ui.h"
+#include "../util.h"
+#include "../libslang.h"
+#include "../keysyms.h"
+
+pthread_mutex_t ui__lock = PTHREAD_MUTEX_INITIALIZER;
+
+static volatile int ui__need_resize;
+
+void ui__refresh_dimensions(bool force)
+{
+        if (force || ui__need_resize) {
+                ui__need_resize = 0;
+                pthread_mutex_lock(&ui__lock);
+                SLtt_get_screen_size();
+                SLsmg_reinit_smg();
+                pthread_mutex_unlock(&ui__lock);
+        }
+}
+
+static void ui__sigwinch(int sig __used)
+{
+        ui__need_resize = 1;
+}
+
+static void ui__setup_sigwinch(void)
+{
+        static bool done;
+
+        if (done)
+                return;
+
+        done = true;
+        pthread__unblock_sigwinch();
+        signal(SIGWINCH, ui__sigwinch);
+}
+
+int ui__getch(int delay_secs)
+{
+        struct timeval timeout, *ptimeout = delay_secs ? &timeout : NULL;
+        fd_set read_set;
+        int err, key;
+
+        ui__setup_sigwinch();
+
+        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();
+}
+
+static void newt_suspend(void *d __used)
+{
+        newtSuspend();
+        raise(SIGTSTP);
+        newtResume();
+}
+
+static void ui__signal(int sig)
+{
+        ui__exit(false);
+        psignal(sig, "perf");
+        exit(0);
+}
+
+int ui__init(bool fallback_to_pager __used)
+{
+        int err;
+
+        newtInit();
+        err = SLkp_init();
+        if (err < 0) {
+                pr_err("TUI initialization failed.\n");
+                goto out;
+        }
+
+        SLkp_define_keysym((char *)"^(kB)", SL_KEY_UNTAB);
+
+        newtSetSuspendCallback(newt_suspend, NULL);
+        ui_helpline__init();
+        ui_browser__init();
+
+        signal(SIGSEGV, ui__signal);
+        signal(SIGFPE, ui__signal);
+        signal(SIGINT, ui__signal);
+        signal(SIGQUIT, ui__signal);
+        signal(SIGTERM, ui__signal);
+out:
+        return err;
+}
+
+void ui__exit(bool wait_for_ok)
+{
+        if (wait_for_ok)
+                ui__question_window("Fatal Error",
+                                    ui_helpline__last_msg,
+                                    "Press any key...", 0);
+
+        SLtt_set_cursor_visibility(1);
+        SLsmg_refresh();
+        SLsmg_reset_smg();
+        SLang_reset_tty();
+}