76 lines
3.3 KiB
C
76 lines
3.3 KiB
C
/*
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* Copyright 2020 Axel Davy <davyaxel0@gmail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* on the rights to use, copy, modify, merge, publish, distribute, sub
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* license, and/or sell copies of the Software, and to permit persons to whom
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* the Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE. */
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#ifndef _NINE_MEMORY_HELPER_H_
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#define _NINE_MEMORY_HELPER_H_
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struct NineDevice9;
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struct nine_allocator;
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struct nine_allocation;
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/* Note: None of these functions are thread safe, thus the worker thread is disallowed
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* to call any of them. Only exception is nine_free_worker reserved for it. */
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struct nine_allocation *
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nine_allocate(struct nine_allocator *allocator, unsigned size);
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/* Note: Suballocations MUST be freed before their parent */
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void nine_free(struct nine_allocator *allocator, struct nine_allocation *allocation);
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void nine_free_worker(struct nine_allocator *allocator, struct nine_allocation *allocation);
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void *nine_get_pointer(struct nine_allocator *allocator, struct nine_allocation *allocation);
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/* We don't need the pointer anymore, but we are likely to need it again soon */
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void nine_pointer_weakrelease(struct nine_allocator *allocator, struct nine_allocation *allocation);
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/* We don't need the pointer anymore, probably for a long time */
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void nine_pointer_strongrelease(struct nine_allocator *allocator, struct nine_allocation *allocation);
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/* You can strong release when counter becomes 0.
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* Once a counter is used for a given allocation, the same must keep being used */
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void nine_pointer_delayedstrongrelease(struct nine_allocator *allocator,
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struct nine_allocation *allocation,
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unsigned *counter);
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/* Note: It is disallowed to release a suballocation before its parent.
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* It is disallowed to suballocate on a suballocation. */
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struct nine_allocation *
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nine_suballocate(struct nine_allocator* allocator, struct nine_allocation *allocation, int offset);
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/* Won't be freed - but at least we can use the same interface */
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struct nine_allocation *
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nine_wrap_external_pointer(struct nine_allocator* allocator, void* data);
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/* memfd_virtualsizelimit: Limit for the virtual memory usage (in MB)
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* above which memfd files are unmapped (to reduce virtual memory usage).
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* If negative, disables memfd usage. */
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struct nine_allocator *
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nine_allocator_create(struct NineDevice9 *device, int memfd_virtualsizelimit);
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void
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nine_allocator_destroy(struct nine_allocator *allocator);
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#endif /* _NINE_MEMORY_HELPER_H_ */
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