[Draw] Remove pause button

vpr/main.ui

@@ -366,19 +366,6 @@
             <property name="top-attach">0</property>
           </packing>
         </child>
-        <child>
-          <object class="GtkButton" id="PauseButton">
-            <property name="label" translatable="yes">Pause</property>
-            <property name="visible">True</property>
-            <property name="can-focus">True</property>
-            <property name="receives-default">True</property>
-            <property name="image-position">right</property>
-          </object>
-          <packing>
-            <property name="left-attach">0</property>
-            <property name="top-attach">2</property>
-          </packing>
-        </child>
         <child>
           <object class="GtkButton" id="debugButton">
             <property name="label" translatable="yes">Debug</property>

vpr/src/base/vpr_signal_handler.cpp

@@ -4,9 +4,10 @@
  *        (ctrl-C from terminal) on POSIX systems. It is only active if
  *        VPR_USE_SIGACTION is defined.
  *
- * If a SIGINT occur the handler sets the 'forced_pause' flag of the VPR
- * context.  If 'forced_pause' is still true when another SIGINT occurs an
- * exception is thrown (typically ending the program).
+ * Behavior:
+ *  - SIGINT  : log, attempt to checkpoint, then exit with INTERRUPTED_EXIT_CODE
+ *  - SIGHUP  : log, attempt to checkpoint, continue running
+ *  - SIGTERM : log, attempt to checkpoint, then exit with INTERRUPTED_EXIT_CODE
  */
 #include "vtr_log.h"
 #include "vtr_time.h"
@@ -17,6 +18,7 @@
 #include "globals.h"
 
 #include "read_place.h"
+#include "read_route.h"
 #include "route_export.h"
 #include <atomic>
 
@@ -27,8 +29,6 @@
 void vpr_signal_handler(int signal);
 void checkpoint();
 
-std::atomic<int> uncleared_sigint_count(0);
-
 #ifdef VPR_USE_SIGACTION
 
 void vpr_install_signal_handler() {
@@ -44,23 +44,9 @@ void vpr_install_signal_handler() {
 
 void vpr_signal_handler(int signal) {
     if (signal == SIGINT) {
-        if (g_vpr_ctx.forced_pause()) {
-            uncleared_sigint_count++; //Previous SIGINT uncleared
-        } else {
-            uncleared_sigint_count.store(1); //Only this SIGINT outstanding
-        }
-
-        if (uncleared_sigint_count == 1) {
-            VTR_LOG("Recieved SIGINT: try again to really exit...\n");
-        } else if (uncleared_sigint_count == 2) {
-            VTR_LOG("Recieved two uncleared SIGINTs: Attempting to checkpoint and exit...\n");
-            checkpoint();
-            std::quick_exit(INTERRUPTED_EXIT_CODE);
-        } else if (uncleared_sigint_count == 3) {
-            //Really exit (e.g. SIGINT while checkpointing)
-            VTR_LOG("Recieved three uncleared SIGINTs: Exiting...\n");
-            std::quick_exit(INTERRUPTED_EXIT_CODE);
-        }
+        VTR_LOG("Recieved SIGINT: Attempting to checkpoint then exit...\n");
+        checkpoint();
+        std::quick_exit(INTERRUPTED_EXIT_CODE);
     } else if (signal == SIGHUP) {
         VTR_LOG("Recieved SIGHUP: Attempting to checkpoint...\n");
         checkpoint();
@@ -92,7 +78,10 @@ void checkpoint() {
     VTR_LOG("Attempting to checkpoint current placement to file: %s\n", placer_checkpoint_file.c_str());
     print_place(nullptr, nullptr, placer_checkpoint_file.c_str(), g_vpr_ctx.placement().block_locs());
 
+    bool is_flat = g_vpr_ctx.routing().is_flat;
+    const Netlist<>& router_net_list = is_flat ? (const Netlist<>&)g_vpr_ctx.atom().netlist() : (const Netlist<>&)g_vpr_ctx.clustering().clb_nlist;
+
     std::string router_checkpoint_file = "router_checkpoint.route";
     VTR_LOG("Attempting to checkpoint current routing to file: %s\n", router_checkpoint_file.c_str());
-    //print_route(nullptr, router_checkpoint_file.c_str());
+    print_route(router_net_list, nullptr, router_checkpoint_file.c_str(), is_flat);
 }

vpr/src/draw/draw.cpp

@@ -85,7 +85,6 @@ static void draw_main_canvas(ezgl::renderer* g);
 static void on_stage_change_setup(ezgl::application* app, bool is_new_window);
 
 static void setup_default_ezgl_callbacks(ezgl::application* app);
-static void set_force_pause(GtkWidget* /*widget*/, gint /*response_id*/, gpointer /*data*/);
 static void set_block_outline(GtkWidget* widget, gint /*response_id*/, gpointer /*data*/);
 static void set_block_text(GtkWidget* widget, gint /*response_id*/, gpointer /*data*/);
 static void set_draw_partitions(GtkWidget* widget, gint /*response_id*/, gpointer /*data*/);
@@ -317,13 +316,7 @@ void update_screen(ScreenUpdatePriority priority, const char* msg, enum pic_type
     draw_state->auto_proceed = (state_change && !should_pause);
 
     if (state_change                   //Must update buttons
-        || should_pause                //The priority means graphics should pause for user interaction
-        || draw_state->forced_pause) { //The user asked to pause
-
-        if (draw_state->forced_pause) {
-            VTR_LOG("Pausing in interactive graphics (user pressed 'Pause')\n");
-            draw_state->forced_pause = false; //Reset pause flag
-        }
+        || should_pause) {             //The priority means graphics should pause for user interaction
 
         application.run(on_stage_change_setup, act_on_mouse_press, act_on_mouse_move,
                         act_on_key_press);
@@ -956,10 +949,6 @@ static void setup_default_ezgl_callbacks(ezgl::application* app) {
     g_signal_connect(zoom_fit_button, "clicked",
                      G_CALLBACK(ezgl::press_zoom_fit), app);
 
-    // Connect Pause button
-    GObject* pause_button = app->get_object("PauseButton");
-    g_signal_connect(pause_button, "clicked", G_CALLBACK(set_force_pause), app);
-
     // Connect Block Outline checkbox
     GObject* block_outline = app->get_object("blockOutline");
     g_signal_connect(block_outline, "toggled", G_CALLBACK(set_block_outline),
@@ -1097,12 +1086,6 @@ static void set_draw_partitions(GtkWidget* widget, gint /*response_id*/, gpointe
     application.refresh_drawing();
 }
 
-static void set_force_pause(GtkWidget* /*widget*/, gint /*response_id*/, gpointer /*data*/) {
-    t_draw_state* draw_state = get_draw_state_vars();
-
-    draw_state->forced_pause = true;
-}
-
 static void run_graphics_commands(const std::string& commands) {
     //A very simmple command interpreter for scripting graphics
     t_draw_state* draw_state = get_draw_state_vars();

vpr/src/draw/draw_types.h

@@ -288,9 +288,6 @@ struct t_draw_state {
 
     std::string graphics_commands;
 
-    ///@brief If we should pause for user interaction (requested by user)
-    bool forced_pause = false;
-
     int sequence_number = 0;
 
     ///@brief net transparency factor (0 - Transparent, 255 - Opaque)