77 lines
2.8 KiB
C++
77 lines
2.8 KiB
C++
/** @file AllocError.hpp
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*
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* @author Roland Conybeare, Dec 2025
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**/
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#pragma once
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#include <cstdint>
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#include <cstddef>
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namespace xo {
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namespace mm {
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enum class error : int32_t {
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/** sentinel **/
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invalid = -1,
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/** not an error **/
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none,
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/** reserved size exhauged **/
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reserve_exhausted,
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/** unable to commit (i.e. mprotect failure) **/
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commit_failed,
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/** allocation size too big (See @ref ArenaConfig::header_size_mask_) **/
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header_size_mask,
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/** sub_alloc not preceded by super alloc (or another sub_alloc) **/
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orphan_sub_alloc,
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/** attempt to call alloc_info for allocator with alloc header feature disabled
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* (e.g. @ref see ArenaConfig::store_header_flag_)
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**/
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alloc_info_disabled,
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/** attempt to call alloc_info for address not owned by allocator **/
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alloc_info_address,
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/** for example: alloc iteration not supported in arenas with
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* AllocConfig.store_header_flag_ = false
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**/
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alloc_iterator_not_supported,
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/** attempt to deref an iterator that does not refer to an alloc **/
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alloc_iterator_deref,
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/** attempt to advance an iterator that does not refer to an alloc **/
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alloc_iterator_next,
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};
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struct AllocError {
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using size_type = std::size_t;
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using value_type = std::byte*;
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AllocError() = default;
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explicit AllocError(error err,
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uint32_t seq) : error_{err},
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error_seq_{seq} {}
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AllocError(error err,
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uint32_t seq,
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size_type req_z,
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size_type com_z,
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size_type rsv_z) : error_{err},
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error_seq_{seq},
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request_z_{req_z},
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committed_z_{com_z},
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reserved_z_{rsv_z} {}
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/** error code **/
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error error_ = error::none;
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/** sequence# of this error.
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* Each error event within an allocator gets next sequence number
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**/
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uint32_t error_seq_ = 0;
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/** reqeust size assoc'd with errror **/
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size_type request_z_ = 0;
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/** committed allocator memory at time of error **/
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size_type committed_z_ = 0;
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/** reserved allocator memory at time of error **/
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size_type reserved_z_ = 0;
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};
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} /*namespace mm*/
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} /*namespace xo*/
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/* end AllocError.hpp */
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