sylveos

commit e250c356eea26ef63234d8d2798e3299daeb9806
parent 983567d8f6eacfe06970a6e28110ccdcb9cf6ab2
Author: Sylvia Ivory <git@sivory.net>
Date:   Thu, 12 Mar 2026 20:11:32 -0700

Process outline

Diffstat:
A
sylveos/process.zig
 | 
57
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++

1 file changed, 57 insertions(+), 0 deletions(-)
diff --git a/sylveos/process.zig b/sylveos/process.zig
@@ -0,0 +1,57 @@
+const std = @import("std");
+const pi = @import("pi");
+
+const Registers = pi.interrupts.Registers;
+const ProcMap = pi.procmap.ProcMap;
+const vfs = pi.fs.vfs;
+
+var processes: std.DoublyLinkedList = .{};
+var allocator: std.mem.Allocator = undefined;
+var pid_counter: usize = 1;
+
+// TODO; virtual handles (stdin, stdout, stderr)
+pub const Handle = struct {
+    entry: vfs.DirectoryEntry,
+    closed: bool,
+};
+
+pub const Process = struct {
+    pid: usize,
+    node: std.DoublyLinkedList.Node,
+    registers: Registers,
+    proc_map: ProcMap,
+    handles: std.ArrayList(Handle),
+
+    pub fn close(self: *Process) void {
+        allocator.free(self.proc_map.pt);
+
+        for (self.handles.items) |handle| {
+            if (handle.closed) continue;
+            handle.entry.close();
+        }
+
+        self.handles.deinit(allocator);
+        allocator.destroy(self);
+    }
+};
+
+pub fn init(alloc: std.mem.Allocator) !void {
+    allocator = alloc;
+}
+
+pub fn destroy() void {
+    var process_node = processes.first;
+
+    while (process_node) |n| {
+        process_node = n.next;
+        get_current().close();
+    }
+}
+
+fn get_current() *Process {
+    return @alignCast(@fieldParentPtr("node", processes.first.?));
+}
+
+pub fn get_pid() *Process {
+    return get_current().pid;
+}