1 files changed, 146 insertions, 0 deletions
diff --git a/libpager/priv.h b/libpager/priv.h
new file mode 100644
index 00000000..0232e3e8
--- /dev/null
+++ b/libpager/priv.h
@@ -0,0 +1,146 @@
+/* Private data for pager library.
+   Copyright (C) 1994,95,96,97,99 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   This program is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include <mach.h>
+#include <hurd.h>
+#include <sys/mman.h>
+#include "pager.h"
+#include <hurd/ports.h>
+
+/* Define this if you think the kernel is sending memory_object_init
+   out of sequence with memory_object_terminate. */
+/* #undef KERNEL_INIT_RACE */
+
+struct pager
+{
+  struct port_info port;
+  struct user_pager_info *upi;
+
+  enum
+    {
+      NOTINIT,			/* before memory_object_init */
+      NORMAL,			/* while running */
+      SHUTDOWN,			/* ignore all further requests */
+    } pager_state;
+
+  struct mutex interlock;
+  struct condition wakeup;
+
+  struct lock_request *lock_requests; /* pending lock requests */
+  struct attribute_request *attribute_requests; /* pending attr requests */
+
+  boolean_t may_cache;
+  memory_object_copy_strategy_t copy_strategy;
+
+  /* Interface ports */
+  memory_object_control_t memobjcntl;
+  memory_object_name_t memobjname;
+
+  int seqno;
+
+  int noterm;			/* number of threads blocking termination */
+
+  struct pager *next, **pprev;
+
+  int termwaiting:1;
+  int waitingforseqno:1;
+
+#ifdef KERNEL_INIT_RACE
+  /* Out of sequence object_init calls waiting for
+     terminations. */
+  struct pending_init *init_head, *init_tail;
+#endif
+
+  char *pagemap;
+  int pagemapsize;
+};
+
+struct lock_request
+{
+  struct lock_request *next, **prevp;
+  vm_address_t start, end;
+  int pending_writes;
+  int locks_pending;
+  int threads_waiting;
+};
+
+struct attribute_request
+{
+  struct attribute_request *next, **prevp;
+  boolean_t may_cache;
+  memory_object_copy_strategy_t copy_strategy;
+  int threads_waiting;
+  int attrs_pending;
+};
+
+#ifdef KERNEL_INIT_RACE
+struct pending_init
+{
+  mach_port_t control;
+  mach_port_t name;
+  struct pending_init *next;
+};
+#endif
+
+enum page_errors
+{
+  PAGE_NOERR,
+  PAGE_ENOSPC,
+  PAGE_EIO,
+  PAGE_EDQUOT,
+};
+
+extern int _pager_page_errors[];
+
+/* Pagemap format */
+/* These are binary state bits */
+/* #define PM_INIT       0x80	data has been written */
+#define PM_INCORE     0x80	/* kernel might have a copy */
+#define PM_PAGINGOUT  0x40	/* being written to disk */
+#define PM_PAGEINWAIT 0x20	/* provide data back when write done */
+#define PM_INVALID    0x10	/* data on disk is irrevocably wrong */
+
+/* These take values of enum page_errors */
+
+/* Doesn't belong here; this is the error that should have been passed
+   through m_o_data_error to the user but isn't; this lets internal use
+   of the pager know what the error is.  */
+#define PM_ERROR(byte) (((byte) & 0xc) >> 2)
+#define SET_PM_ERROR(byte,err) (((byte) & ~0xc) | ((err) << 2))
+
+/* Issue this error on next data_request, but only if it asks for
+   write access.  */
+#define PM_NEXTERROR(byte) ((byte) & 0x3)
+#define SET_PM_NEXTERROR(byte,err) (((byte) & ~0x3) | (err))
+
+struct port_class *_pager_class;
+
+
+void _pager_wait_for_seqno (struct pager *, int);
+void _pager_release_seqno (struct pager *, int);
+void _pager_block_termination (struct pager *);
+void _pager_allow_termination (struct pager *);
+error_t _pager_pagemap_resize (struct pager *, vm_address_t);
+void _pager_mark_next_request_error (struct pager *, vm_address_t,
+				     vm_size_t, error_t);
+void _pager_mark_object_error (struct pager *, vm_address_t,
+			       vm_size_t, error_t);
+void _pager_lock_object (struct pager *, vm_offset_t, vm_size_t, int, int,
+			 vm_prot_t, int);
+void _pager_free_structure (struct pager *);
+void _pager_clean (void *arg);
+void _pager_real_dropweak (void *arg);