reorganize file structure to match the upstream requirements

1 files changed, 47 insertions, 0 deletions

diff --git a/userprog/process.h b/userprog/process.h
new file mode 100644
index 0000000..1609801
--- /dev/null
+++ b/userprog/process.h
@@ -0,0 +1,47 @@
+#ifndef USERPROG_PROCESS_H
+#define USERPROG_PROCESS_H
+
+#include "threads/thread.h"
+
+/* In the current implementation, the capacity is fixed to 1024 (PGSIZE/4) */
+struct fd_table {
+    struct file** fds;
+    int fd_free;    /* lowest-index free FD table entry */
+    int fd_max;     /* highest-index used FD table entry */
+    int fd_cap;     /* FD table capacity */
+};
+
+struct process {
+    /* process tree */
+    tid_t thread_id;
+    tid_t parent_tid;
+    struct list_elem parentelem;       /* Owned by parent */
+
+    /* communication with parent process */
+    struct semaphore exit_sem;
+    struct lock exit_lock;
+    int exit_status;
+
+    /* files */
+    struct file *executable;           /* Loaded executable, if any. */
+    struct fd_table fd_table;          /* File descriptor table */
+
+    /* Owned by syscall.c */
+    void* syscall_buffer;
+    size_t syscall_buffer_page_cnt;
+};
+
+void process_init (void);
+struct process* process_current (void);
+tid_t process_execute (const char *file_name);
+int process_wait (tid_t);
+void process_exit (void);
+void process_activate (void);
+
+int process_open_file(const char* fname);
+struct file* process_get_file(int fd);
+void process_lock_filesys (void);
+void process_unlock_filesys (void);
+bool process_close_file(int fd);
+
+#endif /* userprog/process.h */