8d1316fd23
CACHE_DONT_LOCK_KERNEL_SPACE. If the former is given, the slab memory manager does not wait when reserving memory or pages. The latter prevents area operations. The new flags add a bit of flexibility. E.g. when allocating page mapping objects for userland areas CACHE_DONT_WAIT_FOR_MEMORY is sufficient, i.e. the allocation will succeed as long as pages are available. git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@35246 a95241bf-73f2-0310-859d-f6bbb57e9c96
68 lines
1.8 KiB
C
68 lines
1.8 KiB
C
/*
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* Copyright 2008, Axel Dörfler. All Rights Reserved.
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* Copyright 2007, Hugo Santos. All Rights Reserved.
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*
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* Distributed under the terms of the MIT License.
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*/
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#ifndef _SLAB_SLAB_H_
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#define _SLAB_SLAB_H_
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#include <KernelExport.h>
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#include <OS.h>
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enum {
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/* create_object_cache_etc flags */
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CACHE_NO_DEPOT = 1 << 0,
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CACHE_UNLOCKED_PAGES = 1 << 1,
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CACHE_LARGE_SLAB = 1 << 2,
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/* object_cache_{alloc,free}() flags */
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CACHE_DONT_WAIT_FOR_MEMORY = 1 << 8,
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CACHE_DONT_LOCK_KERNEL_SPACE = 1 << 9,
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/* internal */
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CACHE_ALIGN_ON_SIZE = 1 << 30,
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CACHE_DURING_BOOT = 1 << 31
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};
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struct ObjectCache;
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typedef struct ObjectCache object_cache;
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typedef status_t (*object_cache_constructor)(void* cookie, void* object);
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typedef void (*object_cache_destructor)(void* cookie, void* object);
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typedef void (*object_cache_reclaimer)(void* cookie, int32 level);
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#ifdef __cplusplus
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extern "C" {
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#endif
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object_cache* create_object_cache(const char* name, size_t object_size,
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size_t alignment, void* cookie, object_cache_constructor constructor,
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object_cache_destructor);
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object_cache* create_object_cache_etc(const char* name, size_t object_size,
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size_t alignment, size_t max_byte_usage, uint32 flags, void* cookie,
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object_cache_constructor constructor, object_cache_destructor destructor,
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object_cache_reclaimer reclaimer);
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void delete_object_cache(object_cache* cache);
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status_t object_cache_set_minimum_reserve(object_cache* cache,
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size_t objectCount);
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void* object_cache_alloc(object_cache* cache, uint32 flags);
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void object_cache_free(object_cache* cache, void* object, uint32 flags);
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status_t object_cache_reserve(object_cache* cache, size_t object_count,
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uint32 flags);
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void object_cache_get_usage(object_cache* cache, size_t* _allocatedMemory);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SLAB_SLAB_H_ */
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