5c99d63970
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
57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
/*
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* Copyright 2004-2008, Axel Dörfler, axeld@pinc-software.de.
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* Distributed under the terms of the MIT License.
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*/
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#ifndef _KERNEL_FILE_CACHE_H
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#define _KERNEL_FILE_CACHE_H
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#include <vfs.h>
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#include <vm_types.h>
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#include <module.h>
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// temporary/optional cache syscall API
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#define CACHE_SYSCALLS "cache"
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#define CACHE_CLEAR 1 // takes no parameters
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#define CACHE_SET_MODULE 2 // gets the module name as parameter
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#define CACHE_MODULES_NAME "file_cache"
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#define FILE_CACHE_SEQUENTIAL_ACCESS 0x01
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#define FILE_CACHE_LOADED_COMPLETELY 0x02
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#define FILE_CACHE_NO_IO 0x04
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struct cache_module_info {
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module_info info;
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void (*node_opened)(struct vnode *vnode, int32 fdType, dev_t mountID,
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ino_t parentID, ino_t vnodeID, const char *name, off_t size);
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void (*node_closed)(struct vnode *vnode, int32 fdType, dev_t mountID,
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ino_t vnodeID, int32 accessType);
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void (*node_launched)(size_t argCount, char * const *args);
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};
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#ifdef __cplusplus
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extern "C" {
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#endif
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extern void cache_node_opened(struct vnode *vnode, int32 fdType, vm_cache *cache,
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dev_t mountID, ino_t parentID, ino_t vnodeID, const char *name);
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extern void cache_node_closed(struct vnode *vnode, int32 fdType, vm_cache *cache,
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dev_t mountID, ino_t vnodeID);
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extern void cache_node_launched(size_t argCount, char * const *args);
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extern void cache_prefetch_vnode(struct vnode *vnode, off_t offset, size_t size);
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extern void cache_prefetch(dev_t mountID, ino_t vnodeID, off_t offset, size_t size);
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extern status_t file_map_init(void);
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extern status_t file_cache_init_post_boot_device(void);
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extern status_t file_cache_init(void);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _KRENEL_FILE_CACHE_H */
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