tools/perf/util/ui/setup.c

   1 #include <newt.h>
   2 #include <signal.h>
   3 #include <stdbool.h>
   4
   5 #include "../cache.h"
   6 #include "../debug.h"
   7 #include "browser.h"
   8 #include "helpline.h"
   9 #include "ui.h"
  10 #include "util.h"
  11 #include "libslang.h"
  12 #include "keysyms.h"
  13
  14 pthread_mutex_t ui__lock = PTHREAD_MUTEX_INITIALIZER;
  15
  16 static volatile int ui__need_resize;
  17
  18 void ui__refresh_dimensions(bool force)
  19 {
  20         if (force || ui__need_resize) {
  21                 ui__need_resize = 0;
  22                 pthread_mutex_lock(&ui__lock);
  23                 SLtt_get_screen_size();
  24                 SLsmg_reinit_smg();
  25                 pthread_mutex_unlock(&ui__lock);
  26         }
  27 }
  28
  29 static void ui__sigwinch(int sig __used)
  30 {
  31         ui__need_resize = 1;
  32 }
  33
  34 static void ui__setup_sigwinch(void)
  35 {
  36         static bool done;
  37
  38         if (done)
  39                 return;
  40
  41         done = true;
  42         pthread__unblock_sigwinch();
  43         signal(SIGWINCH, ui__sigwinch);
  44 }
  45
  46 int ui__getch(int delay_secs)
  47 {
  48         struct timeval timeout, *ptimeout = delay_secs ? &timeout : NULL;
  49         fd_set read_set;
  50         int err, key;
  51
  52         ui__setup_sigwinch();
  53
  54         FD_ZERO(&read_set);
  55         FD_SET(0, &read_set);
  56
  57         if (delay_secs) {
  58                 timeout.tv_sec = delay_secs;
  59                 timeout.tv_usec = 0;
  60         }
  61
  62         err = select(1, &read_set, NULL, NULL, ptimeout);
  63
  64         if (err == 0)
  65                 return K_TIMER;
  66
  67         if (err == -1) {
  68                 if (errno == EINTR)
  69                         return K_RESIZE;
  70                 return K_ERROR;
  71         }
  72
  73         key = SLang_getkey();
  74         if (key != K_ESC)
  75                 return key;
  76
  77         FD_ZERO(&read_set);
  78         FD_SET(0, &read_set);
  79         timeout.tv_sec = 0;
  80         timeout.tv_usec = 20;
  81         err = select(1, &read_set, NULL, NULL, &timeout);
  82         if (err == 0)
  83                 return K_ESC;
  84
  85         SLang_ungetkey(key);
  86         return SLkp_getkey();
  87 }
  88
  89 static void newt_suspend(void *d __used)
  90 {
  91         newtSuspend();
  92         raise(SIGTSTP);
  93         newtResume();
  94 }
  95
  96 static int ui__init(void)
  97 {
  98         int err = SLkp_init();
  99
 100         if (err < 0)
 101                 goto out;
 102
 103         SLkp_define_keysym((char *)"^(kB)", SL_KEY_UNTAB);
 104 out:
 105         return err;
 106 }
 107
 108 static void ui__exit(void)
 109 {
 110         SLtt_set_cursor_visibility(1);
 111         SLsmg_refresh();
 112         SLsmg_reset_smg();
 113         SLang_reset_tty();
 114 }
 115
 116 static void ui__signal(int sig)
 117 {
 118         ui__exit();
 119         psignal(sig, "perf");
 120         exit(0);
 121 }
 122
 123 void setup_browser(bool fallback_to_pager)
 124 {
 125         if (!isatty(1) || !use_browser || dump_trace) {
 126                 use_browser = 0;
 127                 if (fallback_to_pager)
 128                         setup_pager();
 129                 return;
 130         }
 131
 132         use_browser = 1;
 133         newtInit();
 134         ui__init();
 135         newtSetSuspendCallback(newt_suspend, NULL);
 136         ui_helpline__init();
 137         ui_browser__init();
 138
 139         signal(SIGSEGV, ui__signal);
 140         signal(SIGFPE, ui__signal);
 141         signal(SIGINT, ui__signal);
 142         signal(SIGQUIT, ui__signal);
 143         signal(SIGTERM, ui__signal);
 144 }
 145
 146 void exit_browser(bool wait_for_ok)
 147 {
 148         if (use_browser > 0) {
 149                 if (wait_for_ok) {
 150                         char title[] = "Fatal Error", ok[] = "Ok";
 151                         newtWinMessage(title, ok, ui_helpline__last_msg);
 152                 }
 153                 ui__exit();
 154         }
 155 }