diff options
Diffstat (limited to 'libpager/offer-page.c')
| -rw-r--r-- | libpager/offer-page.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/libpager/offer-page.c b/libpager/offer-page.c new file mode 100644 index 00000000..0d62da6a --- /dev/null +++ b/libpager/offer-page.c @@ -0,0 +1,52 @@ +/* Wrapper for unsolicited memory_object_data_supply + Copyright (C) 1996, 1997 Free Software Foundation, Inc. + Written by Michael I. Bushnell, p/BSG. + + This file is part of the GNU Hurd. + + The GNU Hurd 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. + + The GNU Hurd 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., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */ + + +#include "priv.h" + +void +pager_offer_page (struct pager *p, + int precious, + int writelock, + vm_offset_t offset, + vm_address_t buf) +{ + mutex_lock (&p->interlock); + + if (_pager_pagemap_resize (p, offset + vm_page_size)) + { + char *pm_entry = &p->pagemap[offset / vm_page_size]; + + while (*pm_entry & PM_INCORE) + { + mutex_unlock (&p->interlock); + pager_flush_some (p, offset, vm_page_size, 1); + mutex_lock (&p->interlock); + } + *pm_entry |= PM_INCORE; + + memory_object_data_supply (p->memobjcntl, offset, buf, vm_page_size, 0, + writelock ? VM_PROT_WRITE : VM_PROT_NONE, + precious, MACH_PORT_NULL); + } + + mutex_unlock (&p->interlock); +} + |