haiku/headers/private/kernel/vm_cache.h

/*
 * Copyright 2003-2007, Axel Dörfler, axeld@pinc-software.de.
 * Distributed under the terms of the MIT License.
 *
 * Copyright 2001-2002, Travis Geiselbrecht. All rights reserved.
 * Distributed under the terms of the NewOS License.
 */
#ifndef _KERNEL_VM_CACHE_H
#define _KERNEL_VM_CACHE_H


#include <kernel.h>
#include <vm.h>


struct kernel_args;


#ifdef __cplusplus
extern "C" {
#endif

status_t vm_cache_init(struct kernel_args *args);
struct VMCache *vm_cache_acquire_locked_page_cache(struct vm_page *page,
	bool dontWait);

#ifdef __cplusplus
}
#endif

#endif	/* _KERNEL_VM_CACHE_H */
Added prototype for vm_cache_write_modified(). Changed size argument of vm_cache_resize() from size_t to off_t. git-svn-id: file:///srv/svn/repos/haiku/trunk/current@10200 a95241bf-73f2-0310-859d-f6bbb57e9c96 2004-11-23 06:17:39 +03:00			`/*`
* vm_copy_on_write_area() did not always correctly divide the ref_count of the two cache_refs - it needs to count the consumers of the lower cache to find its actual number of references; the upper cache could still be in use by someone else. * There were several locking bugs in the VM code; since cache_ref::cache can change, we must not access it without having the cache_ref locked. * As a result, map_backing_store() now requires you to have the lock of the store's cache_ref held. * And therefore, some functions in vm_cache.c must no longer lock the cache_ref on their own, but require the caller to have it locked already. * Added the -s option to the cache/cache_ref KDL commands: it will only print the requested structure, and not its counterpart (useful if accessing one structure results in a page fault, as was possible previously). git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19796 a95241bf-73f2-0310-859d-f6bbb57e9c96 2007-01-14 21:41:57 +03:00			`* Copyright 2003-2007, Axel Dörfler, axeld@pinc-software.de.`
Added prototype for vm_cache_write_modified(). Changed size argument of vm_cache_resize() from size_t to off_t. git-svn-id: file:///srv/svn/repos/haiku/trunk/current@10200 a95241bf-73f2-0310-859d-f6bbb57e9c96 2004-11-23 06:17:39 +03:00			`* Distributed under the terms of the MIT License.`
			`*`
			`* Copyright 2001-2002, Travis Geiselbrecht. All rights reserved.`
			`* Distributed under the terms of the NewOS License.`
			`*/`
It is accomplished ... git-svn-id: file:///srv/svn/repos/haiku/trunk/current@10 a95241bf-73f2-0310-859d-f6bbb57e9c96 2002-07-09 16:24:59 +04:00			`#ifndef _KERNEL_VM_CACHE_H`
			`#define _KERNEL_VM_CACHE_H`

Made C++ safe. git-svn-id: file:///srv/svn/repos/haiku/trunk/current@5075 a95241bf-73f2-0310-859d-f6bbb57e9c96 2003-10-17 18:42:45 +04:00
It is accomplished ... git-svn-id: file:///srv/svn/repos/haiku/trunk/current@10 a95241bf-73f2-0310-859d-f6bbb57e9c96 2002-07-09 16:24:59 +04:00			`#include <kernel.h>`
			`#include <vm.h>`

* vm.h no longer includes vm_types.h - only those that actually need access to the private VM types are including vm_types.h now. * Removed vm_page, vm_area, vm_cache, and vm_address_space typedefs; it's cleaner this way, and the actual types are only used in C++ files now, anyway. * And that caused changes in many files... * Made commpage.h self-containing. * Minor cleanup. git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22329 a95241bf-73f2-0310-859d-f6bbb57e9c96 2007-09-27 16:21:33 +04:00
Some header work: removed unnecessary dependencies to stage2.h, fixed some broken C++ export definitions, added missing licenses etc. git-svn-id: file:///srv/svn/repos/haiku/trunk/current@3152 a95241bf-73f2-0310-859d-f6bbb57e9c96 2003-05-03 20:03:26 +04:00			`struct kernel_args;`


Made C++ safe. git-svn-id: file:///srv/svn/repos/haiku/trunk/current@5075 a95241bf-73f2-0310-859d-f6bbb57e9c96 2003-10-17 18:42:45 +04:00			`#ifdef __cplusplus`
			`extern "C" {`
			`#endif`

Got rid of regions - we're now back in area-land. Renamed vm_area::lock to vm_area::protection to be less confusing - wiring is still called wiring, though (might be renamed to lock later, as that's how BeOS calls it). git-svn-id: file:///srv/svn/repos/haiku/trunk/current@9858 a95241bf-73f2-0310-859d-f6bbb57e9c96 2004-11-08 17:16:35 +03:00			`status_t vm_cache_init(struct kernel_args *args);`
Merged branch haiku/branches/developer/bonefish/vm into trunk. This introduces the following relevant changes: * VMCache: - Renamed vm_cache to VMCache, merged it with vm_store and made it a C++ class with virtual methods (replacing the store operations). Turned the different store implementations into subclasses. - Introduced MergeStore() callback, changed semantics of Commit(). - Changed locking and referencing semantics. A reference can only be acquired/released with the cache locked. An unreferenced cache is deleted and a mergeable cache merged when it is unlocked. This removes the "busy" state of a cache and simplifies the page fault code. * Added VMAnonymousCache, which will implement swap support (work by Zhao Shuai). It is not integrated and used yet, though. * Enabled the mutex/recursive lock holder asserts. * Fixed DoublyLinkedList::Swap(). * Generalized the low memory handler to a low resource handler. And made semaphores and reserved memory handled resources. Made vm_try_resource_memory() optionally wait (with timeout), and used that feature to reserve memory for areas. ... git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26572 a95241bf-73f2-0310-859d-f6bbb57e9c96 2008-07-23 00:36:32 +04:00			`struct VMCache vm_cache_acquire_locked_page_cache(struct vm_page page,`
			`bool dontWait);`
It is accomplished ... git-svn-id: file:///srv/svn/repos/haiku/trunk/current@10 a95241bf-73f2-0310-859d-f6bbb57e9c96 2002-07-09 16:24:59 +04:00
Made C++ safe. git-svn-id: file:///srv/svn/repos/haiku/trunk/current@5075 a95241bf-73f2-0310-859d-f6bbb57e9c96 2003-10-17 18:42:45 +04:00			`#ifdef __cplusplus`
			`}`
			`#endif`

Some header work: removed unnecessary dependencies to stage2.h, fixed some broken C++ export definitions, added missing licenses etc. git-svn-id: file:///srv/svn/repos/haiku/trunk/current@3152 a95241bf-73f2-0310-859d-f6bbb57e9c96 2003-05-03 20:03:26 +04:00			`#endif /* _KERNEL_VM_CACHE_H */`