Tweaks to scheduling (priority) and fixes for the shell

gui.c

@@ -77,6 +77,23 @@ int wallpaper_lock = 0;
 
 struct ModeInfoBlock *modeinfo = (void *)0;
 
+static void gui_window_set_focus(struct window_t *win) {
+	if (win->focused) return;
+
+	for (int i = 0;i < window_count; i++) {
+		if (windows[i]->focused) {
+			windows[i]->focused = 0;
+			windows[i]->mytask->priority -= 10;
+			if (windows[i]->mytask->priority < 1) {
+				windows[i]->mytask->priority = 1;
+			}
+		}
+	}
+
+	win->mytask->priority += 10;
+	win->focused = 1;
+}
+
 void init_gui(multiboot_info_t *mbinfo) {
 	if (mbinfo->flags & 1 << 11) {
 		serialnos = 0;
@@ -333,7 +350,6 @@ extern int gui_change_window_caption(int serialno, char *cap) {
 
 int gui_add_window(unsigned char *contents, char *name, int x, int y, int w, int h, unsigned char *icon, unsigned int flags, void (*keyboard_d)(unsigned char c, unsigned char state)) {
 	struct window_t *new_window;
-	int i;
 
 	if (window_count == 0) {
 		windows = (struct window_t **)dbmalloc(sizeof(struct window_t *), "gui: add window (malloc)");
@@ -356,7 +372,7 @@ int gui_add_window(unsigned char *contents, char *name, int x, int y, int w, int
 	new_window->mclick = 0;
 	new_window->flags = flags;
     new_window->event_msg_count = 0;
-	
+	new_window->focused = 0;
 
 	if (contents == (void *)0) {
 		new_window->contents = (unsigned char *)malloc(w * h * depth);
@@ -380,15 +396,12 @@ int gui_add_window(unsigned char *contents, char *name, int x, int y, int w, int
 
 	strncpy(new_window->name, name, 128);
 	new_window->zorder = window_count;
-	new_window->focused = 1;
-
-	for (i = 0;i < window_count; i++) {
-		windows[i]->focused = 0;
-	}
 
 	windows[window_count] = new_window;
 	window_count++;
 
+	
+
 	keyboard_set_handler(new_window->keyboard_dest);
 	
 	if (current_task != (void *)0) {
@@ -402,6 +415,10 @@ int gui_add_window(unsigned char *contents, char *name, int x, int y, int w, int
 		current_task->window_count++;
 	}
 	
+	new_window->mytask = current_task;
+
+	gui_window_set_focus(new_window);
+
 	return new_window->serialno;
 }
 
@@ -433,7 +450,7 @@ void gui_destroy_window(int serialno, struct task_t *task) {
 			window_count--;
 
 			if (win->focused && window_count > 0) {
-				windows[window_count - 1]->focused = 1;
+				gui_window_set_focus(windows[window_count - 1]);
 			}
 
 			windows = (struct window_t **)realloc(windows, sizeof(struct window_t *) * window_count);
@@ -556,14 +573,12 @@ void gui_sink_to_bottom(int wh) {
 
 	for (int i = wh; i >= 1; i--) {
 		windows[i] = windows[i - 1];
-		windows[i]->focused = 0;
 		windows[i]->zorder++;
 	}
 
 	windows[0] = win;
 	windows[0]->zorder = 0;
-	windows[0]->focused = 0;
-	windows[window_count-1]->focused = 1;
+	gui_window_set_focus(windows[window_count - 1]);
 }
 
 int gui_raise_to_icon_top(int wh) {
@@ -594,18 +609,13 @@ void gui_raise_to_top(int wh) {
 	struct window_t *win;
 	win = windows[wh];
 
-	for (int i = 0; i < wh; i++) {
-		windows[i]->focused = 0;
-	}
-
 	for (int i = wh; i < window_count - 1; i++) {
 		windows[i] = windows[i+1];
 		windows[i]->zorder--;
-		windows[i]->focused = 0;
 	}
 	windows[window_count - 1] = win;
 	windows[window_count - 1]->zorder = window_count - 1;
-	windows[window_count - 1]->focused = 1;
+	gui_window_set_focus(windows[window_count - 1]);
 	keyboard_set_handler(windows[window_count - 1]->keyboard_dest);
 }
 

gui.h

@@ -45,6 +45,7 @@ struct window_t {
 	unsigned char lclick;
 	unsigned char rclick;
 	unsigned char mclick;
+	struct task_t *mytask;
 };
 
 extern void init_gui(multiboot_info_t *mbinfo);

programs/shell/shell.c

@@ -486,7 +486,15 @@ int main(int argc, char **argv) {
 							}
 							free(porig);
 						}
-
+						if (!found) {
+							// try cwd
+							sprintf(buffer, "%s:%s%s", current_drive, cwd, argv_s[0]);
+							if (!stat(buffer, &s)) {
+								if (S_ISREG(s.st_mode)) {
+									found = 1;
+								}
+							}							
+						}
 					} else {
 						if (argv_s[0][0] == '/') {
 							strcpy(buffer2, argv_s[0]);

schedule.c

@@ -111,6 +111,7 @@ void init_scheduler(void) {
   current_task->cr3 = page_directory;
   current_task->kstack = _sys_stack + KRNL_STACK_SIZE;
   current_task->state = TASK_RUNNING;
+  current_task->priority = 1;
   first_task = current_task;
   last_task = current_task;
   strcpy(current_task->name, "KERNEL");
@@ -157,7 +158,6 @@ void sched_free_task(struct task_t *this_task) {
   // free stack virt space
 
   for (i=0;i<this_task->window_count;i++) {
-
     gui_destroy_window(this_task->window_list[i]->serialno, this_task);
   }
 
@@ -216,7 +216,7 @@ void schedule(struct regs *r) {
   unsigned int *status;
   unsigned int *wait_return;
 	
-  if (block_buffer_trim_timer == 20) {
+  if (block_buffer_trim_timer == 200) {
 	  hd_buffer_trim();
 	  block_buffer_trim_timer = 0;
   }
@@ -294,11 +294,8 @@ void schedule(struct regs *r) {
   }
   if (previous_task != current_task) {
     // do switch
-    if (current_task == first_task) {
-      current_task->timetorun = 1;
-    } else {
-      current_task->timetorun = 5;
-    }
+    current_task->timetorun = current_task->priority;
+
     fpu_disable();
 
     if (r->int_no == 0x30) {
@@ -309,7 +306,6 @@ void schedule(struct regs *r) {
   } 
 }
 
-
 struct task_t *sched_new_task() {
   struct task_t *new_task = (struct task_t *)malloc(sizeof(struct task_t));
   memset(new_task, 0, sizeof(struct task_t));
@@ -338,6 +334,7 @@ struct task_t *sched_new_task() {
   new_task->waiting_socket_count = 0;
   new_task->sem_count = 0;
   new_task->cwd = (char *)malloc(strlen(current_task->cwd) + 1);
+  new_task->priority = 5;
   strcpy(new_task->cwd, current_task->cwd);
   strcpy(new_task->name, current_task->name);
   int i;

schedule.h

@@ -59,6 +59,7 @@ struct task_t {
   unsigned int *user_pages_virt;
   unsigned int user_stack_pages[USER_STACK_SIZE / 0x1000];
   unsigned int user_env_pages[64];
+  unsigned int priority;
   struct vfs_device_t *selected_device;
   char *cwd;
   struct window_t **window_list;