reasonably ok multithreading

source/main.cpp

@@ -1,6 +1,7 @@
 #include <locale.h>
 #include <pthread.h>
 #include <sys/ioctl.h>
+#include <unistd.h>
 #include "cli.hpp"
 #include "bash_history.yy.hpp"
 #include "storage.hpp"
@@ -67,17 +68,10 @@ void export_result(const char * const result) {
 }
 
 void * async(void * arg) {
-    entry_t entry;
-
-    while (true) {
+    while (do_run) {
+        tui_take_input();
         if (is_input_changed) {
-            query(rl_line_buffer, entry_lines, selection_offset);
-            is_input_changed = false;
-        } else {
-            requery();
-        }
-        while (entry = get_entry(), entry.command != NULL) {
-            tui_append_back(entry);
+            cancel_all_queries();
         }
     }
 
@@ -85,7 +79,6 @@ void * async(void * arg) {
 }
 
 signed main(const int argc, const char * const * const argv) {
-    extern void testtest(void);
     // NOTE: never returns on error
     parse_arguments(argc, argv);
 
@@ -96,12 +89,23 @@ signed main(const int argc, const char * const * const argv) {
     pthread_t query_thread;
     pthread_create(&query_thread, NULL, async, NULL);
     while (do_run) {
-        tui_take_input();
+        entry_t entry;
+        if (do_redisplay) {
+            do_redisplay = false;
             if (is_input_changed) {
-            testtest();
+                is_input_changed = false;
+                query(rl_line_buffer, entry_lines, selection_offset);
+            } else {
+                requery();
+            }
+            while (entry = get_entry(), entry.command != NULL) {
+                tui_append_back(entry);
             }
             tui_refresh();
         }
+        usleep(1000);
+    }
+    pthread_join(query_thread, NULL);
 
     query(rl_line_buffer, 1, selection_offset + selection_relative);
     export_result(get_entry().command);

source/storage.cpp

@@ -137,7 +137,7 @@ void requery(void) {
     sqlite3_reset(*stmt);
 }
 
-void testtest(void) {
+void cancel_all_queries(void) {
     sqlite3_interrupt(db);
 }
 

source/storage.hpp

@@ -13,6 +13,7 @@ extern int deinit_storage(void);
 extern int insert_entry(const entry_t entry);
 extern void query(const char * const string, const size_t limit, const size_t offset);
 extern void requery(void);
+extern void cancel_all_queries(void);
 extern entry_t get_entry(void);
 
 #endif

source/tui.cpp

@@ -5,8 +5,10 @@
 #include <readline/readline.h>
 
 extern bool do_execute;
+
 size_t entry_lines;
 bool is_input_changed = true;
+bool do_redisplay     = true;
 
 static WINDOW * main_window;
 static WINDOW * entry_window;
@@ -30,7 +32,7 @@ int init_tui(void) {
     // Ncurses
 	initscr();
     nonl();
-    halfdelay(1);
+    cbreak();    //halfdelay(1);
 	noecho();
 	curs_set(0);
     keypad(stdscr, TRUE);
@@ -136,6 +138,7 @@ void tui_take_input(void) {
         case CTRL('k'): {
             if (selection_relative != entry_lines-1) {
                 ++selection_relative;
+                do_redisplay = true;
             } else {
                 ++selection_offset;
                 is_input_changed = true;
@@ -146,6 +149,7 @@ void tui_take_input(void) {
         case CTRL('j'): {
             if (selection_relative != 0) {
                 --selection_relative;
+                do_redisplay = true;
             } else {
                 if (selection_offset != 0) {
                     --selection_offset;
@@ -162,13 +166,15 @@ void tui_take_input(void) {
         case CTRL('d'): {
             if (selection_offset == 0) {
                 selection_relative = 0;
+                do_redisplay = true;
             } else
             if (selection_offset > paging_size) {
                 selection_offset -= paging_size;
+                is_input_changed = true;
             } else {
                 selection_offset = 0;
-            }
                 is_input_changed = true;
+            }
         } break;
         case CTRL('q'): {
             do_execute = false;
@@ -184,4 +190,8 @@ void tui_take_input(void) {
             is_input_changed = true;
         } break;
     }
+
+    if (is_input_changed) {
+        do_redisplay = true;
+    }
 }

source/tui.hpp

@@ -9,7 +9,9 @@ extern "C" char * rl_line_buffer;
 extern size_t entry_lines;
 extern size_t selection_offset;
 extern size_t selection_relative;
+
 extern bool is_input_changed;
+extern bool do_redisplay;
 
 extern int init_tui(void);
 extern int deinit_tui(void);