1/* 2 * Copyright (c) 2013 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 29#ifdef XNU_KERNEL_PRIVATE 30 31#ifndef _VM_VM_COMPRESSOR_PAGER_H_ 32#define _VM_VM_COMPRESSOR_PAGER_H_ 33 34#include <mach/mach_types.h> 35#include <kern/kern_types.h> 36#include <vm/vm_external.h> 37 38extern kern_return_t vm_compressor_pager_put( 39 memory_object_t mem_obj, 40 memory_object_offset_t offset, 41 ppnum_t ppnum, 42 void **current_chead, 43 char *scratch_buf, 44 int *compressed_count_delta_p); 45extern kern_return_t vm_compressor_pager_get( 46 memory_object_t mem_obj, 47 memory_object_offset_t offset, 48 ppnum_t ppnum, 49 int *my_fault_type, 50 int flags, 51 int *compressed_count_delta_p); 52 53#define C_DONT_BLOCK 0x01 54#define C_KEEP 0x02 55 56extern unsigned int vm_compressor_pager_state_clr( 57 memory_object_t mem_obj, 58 memory_object_offset_t offset); 59extern vm_external_state_t vm_compressor_pager_state_get( 60 memory_object_t mem_obj, 61 memory_object_offset_t offset); 62 63#define VM_COMPRESSOR_PAGER_STATE_GET(object, offset) \ 64 (((COMPRESSED_PAGER_IS_ACTIVE || \ 65 DEFAULT_FREEZER_COMPRESSED_PAGER_IS_ACTIVE) && \ 66 (object)->internal && \ 67 (object)->pager != NULL && \ 68 !(object)->terminating && \ 69 (object)->alive) \ 70 ? vm_compressor_pager_state_get((object)->pager, \ 71 (offset) + (object)->paging_offset) \ 72 : VM_EXTERNAL_STATE_UNKNOWN) 73 74#define VM_COMPRESSOR_PAGER_STATE_CLR(object, offset) \ 75 MACRO_BEGIN \ 76 if ((COMPRESSED_PAGER_IS_ACTIVE || \ 77 DEFAULT_FREEZER_COMPRESSED_PAGER_IS_ACTIVE) && \ 78 (object)->internal && \ 79 (object)->pager != NULL && \ 80 !(object)->terminating && \ 81 (object)->alive) { \ 82 int _num_pages_cleared; \ 83 _num_pages_cleared = \ 84 vm_compressor_pager_state_clr( \ 85 (object)->pager, \ 86 (offset) + (object)->paging_offset); \ 87 if (_num_pages_cleared) { \ 88 vm_compressor_pager_count((object)->pager, \ 89 -_num_pages_cleared, \ 90 FALSE, /* shared */ \ 91 (object)); \ 92 } \ 93 if (_num_pages_cleared && \ 94 (object)->purgable != VM_PURGABLE_DENY && \ 95 (object)->vo_purgeable_owner != NULL) { \ 96 /* less compressed purgeable pages */ \ 97 assert(_num_pages_cleared == 1); \ 98 vm_purgeable_compressed_update( \ 99 (object), \ 100 -_num_pages_cleared); \ 101 } \ 102 } \ 103 MACRO_END 104 105extern void vm_compressor_pager_transfer( 106 memory_object_t dst_mem_obj, 107 memory_object_offset_t dst_offset, 108 memory_object_t src_mem_obj, 109 memory_object_offset_t src_offset); 110extern memory_object_offset_t vm_compressor_pager_next_compressed( 111 memory_object_t mem_obj, 112 memory_object_offset_t offset); 113 114extern void vm_compressor_init(void); 115extern int vm_compressor_put(ppnum_t pn, int *slot, void **current_chead, char *scratch_buf); 116extern int vm_compressor_get(ppnum_t pn, int *slot, int flags); 117extern int vm_compressor_free(int *slot, int flags); 118extern unsigned int vm_compressor_pager_reap_pages(memory_object_t mem_obj, int flags); 119extern unsigned int vm_compressor_pager_get_slots_occupied(memory_object_t mem_obj); 120extern unsigned int vm_compressor_pager_get_count(memory_object_t mem_obj); 121extern void vm_compressor_pager_count(memory_object_t mem_obj, 122 int compressed_count_delta, 123 boolean_t shared_lock, 124 vm_object_t object); 125extern void vm_compressor_transfer(int *dst_slot_p, int *src_slot_p); 126 127#endif /* _VM_VM_COMPRESSOR_PAGER_H_ */ 128 129#endif /* XNU_KERNEL_PRIVATE */ 130