xv6/fd.h

struct fd {
  enum { FD_CLOSED, FD_NONE, FD_PIPE, FD_FILE } type;
  int ref; // reference count
  char readable;
  char writable;
  struct pipe *pipe;
  struct inode *ip;
  uint off;
};

extern struct fd fds[NFD];
file descriptors pipes 2006-06-27 14:35:53 +00:00			`struct fd {`
open() 2006-07-29 09:35:02 +00:00			`enum { FD_CLOSED, FD_NONE, FD_PIPE, FD_FILE } type;`
more name cleanup 2006-07-16 02:04:58 +00:00			`int ref; // reference count`
file descriptors pipes 2006-06-27 14:35:53 +00:00			`char readable;`
writeable => writable 2006-09-06 18:06:04 +00:00			`char writable;`
file descriptors pipes 2006-06-27 14:35:53 +00:00			`struct pipe *pipe;`
open() 2006-07-29 09:35:02 +00:00			`struct inode *ip;`
fix race in holding() check in acquire() give cpu1 a TSS and gdt for when it enters scheduler() and a pseudo proc[] entry for each cpu cpu0 waits for each other cpu to start up read() for files 2006-08-08 19:58:06 +00:00			`uint off;`
file descriptors pipes 2006-06-27 14:35:53 +00:00			`};`

			`extern struct fd fds[NFD];`