Base: added support for signals.

Added signals. Programs can sign up to recieve said signals and
interpret them how they want.

6 files changed, 88 insertions, 13 deletions

diff --git a/src/pOS/arch/x86/kernel/drivers/keyboard/include/kbbuf.h b/src/pOS/arch/x86/kernel/drivers/keyboard/include/kbbuf.h
index 6b76fa0..566765a 100644
--- a/src/pOS/arch/x86/kernel/drivers/keyboard/include/kbbuf.h
+++ b/src/pOS/arch/x86/kernel/drivers/keyboard/include/kbbuf.h
@@ -3,6 +3,7 @@
 
 #include <stdbool.h>
 #include <kernel/tty.h>
+#include <kernel/signals.h>
 #include "scancodes.h"
 
 #define KEYBUFSIZ 128
diff --git a/src/pOS/arch/x86/kernel/drivers/keyboard/kbbuf.cpp b/src/pOS/arch/x86/kernel/drivers/keyboard/kbbuf.cpp
index 0892865..7bc3766 100644
--- a/src/pOS/arch/x86/kernel/drivers/keyboard/kbbuf.cpp
+++ b/src/pOS/arch/x86/kernel/drivers/keyboard/kbbuf.cpp
@@ -19,30 +19,24 @@ int KB_BUF::scan(unsigned char code)
 
   switch(code)
   {
-  /* IMPLEMENT WITH SIG CODES */
     case ESC:
+        Signals::send_signal(ESC_SIG);
         break;
 
     case UP_ARROW:
-        if(shifted)
-            TTY::tty_scroll(+1);
-        else
-            TTY::tty_cursor_move(0, -1);
+        Signals::send_signal(UP_ARROW_SIG);
         break;
 
     case LEFT_ARROW:
-        TTY::tty_cursor_move(-1, 0);
+        Signals::send_signal(LEFT_ARROW_SIG);
         break;
 
     case RIGHT_ARROW:
-        TTY::tty_cursor_move(1, 0);
+        Signals::send_signal(RIGHT_ARROW_SIG);
         break;
 
     case DOWN_ARROW:
-        if(shifted)
-            TTY::tty_scroll(-1);
-        else
-            TTY::tty_cursor_move(0, +1);
+        Signals::send_signal(DOWN_ARROW_SIG);
         break;
     /* IMPLEMENT WITH SIG CODES */
 
diff --git a/src/pOS/arch/x86/kernel/shell/shell.cpp b/src/pOS/arch/x86/kernel/shell/shell.cpp
index 9dc1fcd..bbaf182 100644
--- a/src/pOS/arch/x86/kernel/shell/shell.cpp
+++ b/src/pOS/arch/x86/kernel/shell/shell.cpp
@@ -2,22 +2,45 @@
 
 char Shell::prefix[10];
 
+void signal_handler(Signal_Type signal)
+{
+    switch(signal)
+    {
+        case ESC_SIG:
+            break;
+        case LEFT_ARROW_SIG:
+            TTY::tty_cursor_move(-1, 0);
+            break;
+        case RIGHT_ARROW_SIG:
+            TTY::tty_cursor_move(+1, 0);
+            break;
+        case UP_ARROW_SIG:
+            /* TODO: implement history */
+            break;
+        case DOWN_ARROW_SIG:
+            break;
+        case KILL_SIG:
+            break;
+    }
+}
+
 int Shell::init(void)
 {
     Shell::set_prefix("pOS# ");
+    Signals::register_recieve(signal_handler);
     return run();
 }
 
 int Shell::run(void)
 {
     char c;
-    char cmd[20];        /* Mem management */
     int indx = 0;
+    char cmd[20];        /* Mem management */
     printf("pOS# ");
     while((c = getc()) && c != EOF)
     {
         putc(c);
-        /* TODO: Handle signals */
+
         if(c == '\b')
             indx--;
         else if(c == '\n')
diff --git a/src/pOS/arch/x86/kernel/signals.cpp b/src/pOS/arch/x86/kernel/signals.cpp
new file mode 100644
index 0000000..b43c9fb
--- /dev/null
+++ b/src/pOS/arch/x86/kernel/signals.cpp
@@ -0,0 +1,33 @@
+#include <kernel/signals.h>
+
+static int index = 0;
+
+static void* singnal_handlers[10] =
+{
+    0,0,0,0,0,0,0,0,0,0
+};
+
+int Signals::send_signal(Signal_Type signal)
+{
+    for(size_t i = 0; i < 10; i++)
+    {
+        void (*handler)(Signal_Type sig);
+
+        handler = reinterpret_cast<void (*)(Signal_Type sig)>(singnal_handlers[i]);
+        if (handler)
+        {
+            handler(signal);
+        }
+    }
+
+    return 0;
+}
+
+int Signals::register_recieve(void (*handler)(Signal_Type sig))
+{
+    singnal_handlers[index++] = reinterpret_cast<void *&>(handler);
+    if(index >= 10)         /* 10 max, temp*/
+        index = 0;
+
+    return 0;
+}
diff --git a/src/pOS/include/kernel/shell/shell.h b/src/pOS/include/kernel/shell/shell.h
index ced7ca6..32ab101 100644
--- a/src/pOS/include/kernel/shell/shell.h
+++ b/src/pOS/include/kernel/shell/shell.h
@@ -3,6 +3,7 @@
 
 #include <stdio.h>
 #include <assert.h>
+#include <kernel/signals.h>
 #include <kernel/shell/cmd.h>
 
 class Shell
diff --git a/src/pOS/include/kernel/signals.h b/src/pOS/include/kernel/signals.h
new file mode 100644
index 0000000..65b9c62
--- /dev/null
+++ b/src/pOS/include/kernel/signals.h
@@ -0,0 +1,23 @@
+#ifndef _SIGNALS_H_
+#define _SIGNALS_H_
+
+#include <stddef.h>
+
+enum Signal_Type
+{
+    ESC_SIG,
+    LEFT_ARROW_SIG,
+    RIGHT_ARROW_SIG,
+    UP_ARROW_SIG,
+    DOWN_ARROW_SIG,
+    KILL_SIG
+};
+
+class Signals
+{
+public:
+    static int send_signal(Signal_Type signal);
+    static int register_recieve(void (*handler)(Signal_Type sig));
+};
+
+#endif