Kernel: Add basic IPC and move to microkernel design.

The IPC design is currently a WIP and is nowhere near complete

2 files changed, 17 insertions, 1 deletions

diff --git a/kernel/sched/scheduler.c b/kernel/sched/scheduler.c
index 7d13277..ccc5956 100644
--- a/kernel/sched/scheduler.c
+++ b/kernel/sched/scheduler.c
@@ -17,7 +17,19 @@ u32 next_pid = 0;
 
 extern u32 read_eip(void);
 
-process_t *get_current_task(void) { return current_task; }
+process_t *get_current_task(void) {
+  return current_task;
+}
+
+bool get_task_from_pid(u32 pid, process_t **out) {
+  for (process_t *tmp = ready_queue; tmp; tmp = tmp->next) {
+    if (tmp->pid == pid) {
+      *out = tmp;
+      return true;
+    }
+  }
+  return false;
+}
 
 void set_signal_handler(int sig, void (*handler)(int)) {
   if (sig >= 20 || sig < 0)
diff --git a/kernel/sched/scheduler.h b/kernel/sched/scheduler.h
index f57a319..17e5d56 100644
--- a/kernel/sched/scheduler.h
+++ b/kernel/sched/scheduler.h
@@ -3,8 +3,10 @@
 #include <fs/ext2.h>
 #include <fs/vfs.h>
 #include <halts.h>
+#include <ipc.h>
 #include <mmu.h>
 #include <signal.h>
+#include <stdbool.h>
 
 #define MAX_PATH 256
 #define KEYBOARD_HALT 0
@@ -41,6 +43,7 @@ struct Process {
   u32 signal_handler_stack;
   void *signal_handlers[20];
   PageDirectory *cr3;
+  struct IpcMailbox ipc_mailbox;
   vfs_fd_t *file_descriptors[100];
   vfs_inode_t *read_halt_inode[100];
   vfs_inode_t *write_halt_inode[100];
@@ -59,6 +62,7 @@ struct Process {
   int dead;
 };
 
+bool get_task_from_pid(u32 pid, process_t **out);
 process_t *get_current_task(void);
 int get_free_fd(process_t *p, int allocate);
 void free_process(void);