Ingo Weinhold
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
54 lines
1.4 KiB
C
54 lines
1.4 KiB
C
/*
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* Copyright 2008, Ingo Weinhold, [email protected].
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* Copyright 2005-2007, Axel Dörfler, [email protected]. All rights reserved.
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* Distributed under the terms of the MIT License.
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*/
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#ifndef _KERNEL_LOW_RESOURCE_MANAGER_H
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#define _KERNEL_LOW_RESOURCE_MANAGER_H
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#include <SupportDefs.h>
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/* warning levels for low resource handlers */
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enum {
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B_NO_LOW_RESOURCE = 0,
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B_LOW_RESOURCE_NOTE,
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B_LOW_RESOURCE_WARNING,
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B_LOW_RESOURCE_CRITICAL,
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};
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enum {
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B_KERNEL_RESOURCE_PAGES = 0x01, /* physical pages */
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B_KERNEL_RESOURCE_MEMORY = 0x02, /* reservable memory */
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B_KERNEL_RESOURCE_SEMAPHORES = 0x04, /* semaphores */
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B_ALL_KERNEL_RESOURCES = B_KERNEL_RESOURCE_PAGES
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| B_KERNEL_RESOURCE_MEMORY
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| B_KERNEL_RESOURCE_SEMAPHORES
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};
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typedef void (*low_resource_func)(void *data, uint32 resources, int32 level);
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#ifdef __cplusplus
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extern "C" {
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#endif
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status_t low_resource_manager_init(void);
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status_t low_resource_manager_init_post_thread(void);
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int32 low_resource_state(uint32 resources);
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void low_resource(uint32 resource, uint64 requirements, uint32 flags,
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uint32 timeout);
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// these calls might get public some day
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status_t register_low_resource_handler(low_resource_func function, void *data,
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uint32 resources, int32 priority);
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status_t unregister_low_resource_handler(low_resource_func function,
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void *data);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _KERNEL_LOW_RESOURCE_MANAGER_H */
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