5 files changed, 32 insertions, 14 deletions

diff --git a/console.c b/console.c
index 6c1ae53..4ab263d 100644
--- a/console.c
+++ b/console.c
@@ -55,11 +55,12 @@ void console_leave(struct console *cons, PANEL *pan) {
     cbreak();
 }
 
-void console_update(struct console *cons, PANEL *pan) {
-    ssize_t nb;
+int console_update(struct console *cons, PANEL *pan) {
     char c;
+    int did_read = 0;
 
-    while ((nb = read(cons->master, &c, 1)) > 0) {
+    while (read(cons->master, &c, 1) > 0) {
+        did_read = 1;
         if (!cons->isesc) {
             if (c == 0x1b) {
                 cons->isesc = 1;
@@ -72,6 +73,8 @@ void console_update(struct console *cons, PANEL *pan) {
             }
         }
     }
+
+    return did_read;
 }
 
 void console_input(struct console *cons, int ch) {
diff --git a/console.h b/console.h
index 054b768..23a3eb4 100644
--- a/console.h
+++ b/console.h
@@ -11,7 +11,7 @@ extern int console_init(struct console *cons);
 extern int console_deinit(struct console *cons);
 extern void console_enter(struct console *cons, PANEL *pan);
 extern void console_leave(struct console *cons, PANEL *pan);
-extern void console_update(struct console *cons, PANEL *pan);
+extern int console_update(struct console *cons, PANEL *pan);
 extern void console_input(struct console *cons, int ch);
 
 extern int console_configslave(struct console *cons);
diff --git a/debugger.c b/debugger.c
index 401f6dd..3902819 100644
--- a/debugger.c
+++ b/debugger.c
@@ -546,7 +546,7 @@ int dbg_free(struct thread *th) {
     return -1;
 }
 
-void dbg_sync(struct process *proc) {
+int dbg_sync(struct process *proc) {
     struct thread *acted = NULL;
 
     struct list *threads = &proc->threads;
@@ -566,6 +566,8 @@ void dbg_sync(struct process *proc) {
         capture_state(proc);
         resume_threads(proc);
     }
+
+    return acted != NULL;
 }
 
 int dbg_intr(struct thread *th) {
diff --git a/debugger.h b/debugger.h
index b26adf8..6a3fba7 100644
--- a/debugger.h
+++ b/debugger.h
@@ -67,7 +67,7 @@ extern struct process *dbg_attach(pid_t pid, int child);
 extern void dbg_detach(struct process *proc);
 extern int dbg_free(struct thread *th);
 
-extern void dbg_sync(struct process *proc);
+extern int dbg_sync(struct process *proc);
 
 extern int dbg_intr(struct thread *th);
 extern int dbg_cont(struct thread *th);
diff --git a/misplays.c b/misplays.c
index a2535c3..3e3ae20 100644
--- a/misplays.c
+++ b/misplays.c
@@ -193,10 +193,12 @@ static void info_update(struct thread *th, PANEL *pan) {
     disasm(th, pan);
 }
 
-static void wait_all_threads(struct list *processes) {
+static int wait_all_threads(struct list *processes) {
+    int action = 0;
     for (struct process *proc = processes->head; proc != processes->end; proc = proc->next) {
-        dbg_sync(proc);
+        action |= dbg_sync(proc);
     }
+    return action;
 }
 
 static void layout(struct list *processes, struct thread *th) {
@@ -286,14 +288,11 @@ int main(int argc, char **argv) {
 
     int quit = 0;
     int mode = 0;
+    int dirty = 1;
+    int pressed = 0;
     while (!quit) {
-        wait_all_threads(&processes);
-        layout(&processes, th);
-        console_update(&cons, right);
-        info_update(th, left);
-        cursupdate();
-
         int ch = getch();
+        pressed = 1;
 
         if (mode == 0) {
             switch (ch) {
@@ -406,6 +405,9 @@ int main(int argc, char **argv) {
                     b->enabled = en;
                     b->tid = tid;
                     break;
+                case ERR:
+                    pressed = 0;
+                    break;
             }
         } else {
             switch (ch) {
@@ -417,12 +419,23 @@ int main(int argc, char **argv) {
                     console_leave(&cons, right);
                     break;
                 case ERR:
+                    pressed = 0;
                     break;
                 default:
                     console_input(&cons, ch);
                     break;
             }
         }
+
+        dirty |= wait_all_threads(&processes);
+        dirty |= console_update(&cons, right);
+
+        if (dirty || pressed) {
+            layout(&processes, th);
+            info_update(th, left);
+            cursupdate();
+            dirty = 0;
+        }
     }
 
     for (struct process *p = processes.head; p != processes.end; p = p->next) {