59 lines
1.9 KiB
C++
59 lines
1.9 KiB
C++
/*
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* Copyright (c) 2013 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* sortix/kernel/segment.h
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* Structure representing a segment in a process.
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*/
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#ifndef _INCLUDE_SORTIX_KERNEL_SEGMENT_H
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#define _INCLUDE_SORTIX_KERNEL_SEGMENT_H
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#include <stddef.h>
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#include <stdint.h>
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namespace Sortix {
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class Process;
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struct segment
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{
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uintptr_t addr;
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size_t size;
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int prot;
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};
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static inline int segmentcmp(const void* a_ptr, const void* b_ptr)
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{
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const struct segment* a = (const struct segment*) a_ptr;
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const struct segment* b = (const struct segment*) b_ptr;
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return a->addr < b->addr ? -1 :
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b->addr < a->addr ? 1 :
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a->size < b->size ? -1 :
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b->size < a->size ? 1 :
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0 ;
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}
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bool AreSegmentsOverlapping(const struct segment* a, const struct segment* b);
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bool IsUserspaceSegment(const struct segment* segment);
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struct segment* FindOverlappingSegment(Process* process, const struct segment* new_segment);
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bool IsSegmentOverlapping(Process* process, const struct segment* new_segment);
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bool AddSegment(Process* process, const struct segment* new_segment);
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bool PlaceSegment(struct segment* solution, Process* process, void* addr_ptr,
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size_t size, int flags);
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} // namespace Sortix
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#endif
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