Move Process & Thread to the object folder.

zion/object/process.h

@@ -0,0 +1,52 @@
+#pragma once
+
+#include <stdint.h>
+
+#include "capability/capability.h"
+#include "lib/linked_list.h"
+#include "lib/ref_ptr.h"
+#include "lib/shared_ptr.h"
+#include "memory/virtual_memory.h"
+
+// Forward decl due to cyclic dependency.
+class Thread;
+
+class Process : public KernelObject {
+ public:
+  enum State {
+    UNSPECIFIED,
+    SETUP,
+    RUNNING,
+    FINISHED,
+  };
+  static RefPtr<Process> RootProcess();
+  static RefPtr<Process> Create();
+
+  uint64_t id() const { return id_; }
+  VirtualMemory& vmm() { return vmm_; }
+
+  RefPtr<Thread> CreateThread();
+  RefPtr<Thread> GetThread(uint64_t tid);
+
+  SharedPtr<Capability> GetCapability(uint64_t cid);
+  uint64_t AddCapability(const RefPtr<Thread>& t);
+  // Checks the state of all child threads and transitions to
+  // finished if all have finished.
+  void CheckState();
+
+  State GetState() { return state_; }
+
+ private:
+  friend class MakeRefCountedFriend<Process>;
+  Process();
+  Process(uint64_t id) : id_(id), vmm_(VirtualMemory::ForRoot()) {}
+  uint64_t id_;
+  VirtualMemory vmm_;
+  State state_;
+
+  uint64_t next_thread_id_ = 0;
+  uint64_t next_cap_id_ = 0x100;
+
+  LinkedList<RefPtr<Thread>> threads_;
+  LinkedList<SharedPtr<Capability>> caps_;
+};