b1f4df4a62
serve, bin sizes and page size. This minimizes the amount of "large" allocations made in heaps that don't have a bin for the allocation size (combining multiple pages). This is desirable as such large allocations are generally pretty inefficient, and also because it separates larger from smaller allocations better, making the chance of a heap becoming empty higher. For now there are three heap classes "small", "large" and "huge", with a predefined set of bin sizes for each. This might need some finetuning later on. Reduce the grow size to 4MB though as the allocations should now be spread across heap classes which each grow on their own. git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26210 a95241bf-73f2-0310-859d-f6bbb57e9c96
48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
/*
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* Copyright 2002-2006, 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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* Copyright 2001-2002, Travis Geiselbrecht. All rights reserved.
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* Distributed under the terms of the NewOS License.
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*/
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#ifndef _KERNEL_HEAP_H
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#define _KERNEL_HEAP_H
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#include <OS.h>
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// allocate 16MB initial heap for the kernel
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#define INITIAL_HEAP_SIZE 16 * 1024 * 1024
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// grow by another 4MB each time the heap runs out of memory
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#define HEAP_GROW_SIZE 4 * 1024 * 1024
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// allocate a dedicated 1MB area for dynamic growing
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#define HEAP_DEDICATED_GROW_SIZE 1 * 1024 * 1024
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// use areas for allocations bigger than 1MB
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#define HEAP_AREA_USE_THRESHOLD 1 * 1024 * 1024
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#ifdef __cplusplus
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extern "C" {
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#endif
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// malloc_nogrow disallows waiting for a grow to happen - only to be used by
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// vm functions that may deadlock on a triggered area creation
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void *malloc_nogrow(size_t size);
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void *memalign(size_t alignment, size_t size);
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void deferred_free(void* block);
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void* malloc_referenced(size_t size);
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void* malloc_referenced_acquire(void* data);
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void malloc_referenced_release(void* data);
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status_t heap_init(addr_t heapBase, size_t heapSize);
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status_t heap_init_post_sem();
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status_t heap_init_post_thread();
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#ifdef __cplusplus
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}
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#endif
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#endif /* _KERNEL_MEMHEAP_H */
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