From ecf1e4c6c6efc3edeb006ff120ac60a191ddce50 Mon Sep 17 00:00:00 2001
From: Anton Kling <anton@kling.gg>
Date: Mon, 30 Oct 2023 20:46:36 +0100
Subject: Kernel/LibC: Add signals and support for custom signal handlers to
 processes.

---
 sched/scheduler.h | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

(limited to 'sched/scheduler.h')

diff --git a/sched/scheduler.h b/sched/scheduler.h
index 7df7c40..fc92ff3 100644
--- a/sched/scheduler.h
+++ b/sched/scheduler.h
@@ -4,6 +4,7 @@
 #include <fs/vfs.h>
 #include <halts.h>
 #include <mmu.h>
+#include <signal.h>
 
 #define MAX_PATH 256
 #define KEYBOARD_HALT 0
@@ -19,6 +20,8 @@ void *mmap(void *addr, size_t length, int prot, int flags, int fd,
            size_t offset);
 int munmap(void *addr, size_t length);
 int msync(void *addr, size_t length, int flags);
+int kill(pid_t pid, int sig);
+void set_signal_handler(int sig, void (*handler)(int));
 
 typedef struct {
   void *u_address;
@@ -34,25 +37,26 @@ struct Process {
   char program_name[100];
   char current_working_directory[MAX_PATH];
   uint32_t eip, esp, ebp;
+  uint8_t incoming_signal;
+  uint32_t signal_handler_stack;
+  void *signal_handlers[20];
   PageDirectory *cr3;
   vfs_fd_t *file_descriptors[100];
   vfs_inode_t *read_halt_inode[100];
   vfs_inode_t *write_halt_inode[100];
   vfs_inode_t *disconnect_halt_inode[100];
-  //	struct vfs_fd_t ** file_descriptors;
   uint32_t halts[2];
   struct Halt *halt_list;
   void *data_segment_end;
-  //	uint32_t *halts;
   process_t *next;
   process_t *parent;
+  // TODO: Create a linkedlist of childs so that the parent process
+  // can do stuff such as reap zombies and get status.
   process_t *child;
   MemoryMap *maps[100];
   uint32_t sleep_until;
   int child_rc;
   int dead;
-  // FIXME: Create a linkedlisti of childs so that the parent process
-  // can do stuff such as reap zombies and get status.
 };
 
 process_t *get_current_task(void);
-- 
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