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
65 lines
1.5 KiB
C
65 lines
1.5 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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#ifdef __cplusplus
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#include <new>
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static const struct nogrow_t {
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} nogrow = {};
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inline void*
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operator new(size_t size, const nogrow_t& nogrow)
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{
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return malloc_nogrow(size);
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}
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#endif /* __cplusplus */
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#endif /* _KERNEL_MEMHEAP_H */
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