[PATCH 4/10] give user ability to set refresh time

[Sergey Senozhatsky]

    Introduce ability to set powertop refresh timeout via `-s` switch.
    Currently, measurement timeout is allowed to be within [1,32] secs
    range.

Signed-off-by: Sergey Senozhatsky <sergey.senozhat...@gmail.com>

---
 main.cpp |   27 ++++++++++++++++++++++-----
 1 file changed, 22 insertions(+), 5 deletions(-)

diff --git a/main.cpp b/main.cpp
index afc124b..77e6d05 100644
--- a/main.cpp
+++ b/main.cpp
@@ -60,7 +60,7 @@
 #define DEBUGFS_MAGIC          0x64626720
 
 int debug_learning = 0;
-
+unsigned time_out = 20;
 int leave_powertop = 0;
 
 static const struct option long_options[] =
@@ -83,6 +83,20 @@ static void print_version()
        printf(_("Powertop version" POWERTOP_VERSION ", compiled on "__DATE__ 
"\n"));
 }
 
+static bool set_refresh_timeout()
+{
+       static char buf[4];
+       mvprintw(1, 0, "%s (currently %u): ", _("Set refresh time out"), 
time_out);
+       memset(buf, '\0', sizeof(buf));
+       get_user_input(buf, sizeof(buf) - 1);
+       show_tab(0);
+       unsigned time = strtoul(buf, NULL, 0);
+       if (!time) return 0;
+       if (time > 32) time = 32;
+       time_out = time;
+       return 1;
+}
+
 static void print_usage()
 {
        printf(_("Usage: powertop [OPTIONS]\n\n"));
@@ -136,6 +150,10 @@ static void do_sleep(int seconds)
                case 10:
                        cursor_enter();
                        break;
+               case 's':
+                       if (set_refresh_timeout())
+                               return;
+                       break;
                case 'r':
                        window_refresh();
                        return;
@@ -259,7 +277,6 @@ int main(int argc, char **argv)
        int c;
        bool wantreport = FALSE;
        char filename[4096];;
-       int  timetotest = 20;
        int  iterations = 1;
        struct statfs st_fs;
 
@@ -349,7 +366,7 @@ int main(int argc, char **argv)
                                break;
 
                        case 't':
-                               timetotest = (optarg ? atoi(optarg) : 20);
+                               time_out = (optarg ? atoi(optarg) : 20);
                                break;
 
                        case 'i':
@@ -368,7 +385,7 @@ int main(int argc, char **argv)
        }
 
        if (wantreport)
-                report(timetotest, iterations, filename);
+                report(time_out, iterations, filename);
 
        if (debug_learning)
                printf("Learning debugging enabled\n");
@@ -397,7 +414,7 @@ int main(int argc, char **argv)
 
 
        while (!leave_powertop) {
-               one_measurement(timetotest);
+               one_measurement(time_out);
                show_cur_tab();
                learn_parameters(15, 0);
        }

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