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https://github.com/neovim/neovim.git
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a89088b7a0
Problem: Error when the drive of the swap file was disconnected.
Solution: Try closing and re-opening the swap file. (closes vim/vim#4378)
b58a4b938c
Co-authored-by: Bram Moolenaar <Bram@vim.org>
69 lines
2.6 KiB
C
69 lines
2.6 KiB
C
#pragma once
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include "nvim/map_defs.h"
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/// A block number.
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///
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/// Blocks numbered from 0 upwards have been assigned a place in the actual
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/// file. The block number is equal to the page number in the file. The blocks
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/// with negative numbers are currently in memory only.
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typedef int64_t blocknr_T;
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/// A block header.
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///
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/// There is a block header for each previously used block in the memfile.
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///
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/// The block may be linked in the used list OR in the free list.
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///
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/// The used list is a doubly linked list, most recently used block first.
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/// The blocks in the used list have a block of memory allocated.
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/// The free list is a single linked list, not sorted.
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/// The blocks in the free list have no block of memory allocated and
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/// the contents of the block in the file (if any) is irrelevant.
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typedef struct {
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blocknr_T bh_bnum; ///< key used in hash table
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void *bh_data; ///< pointer to memory (for used block)
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unsigned bh_page_count; ///< number of pages in this block
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#define BH_DIRTY 1U
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#define BH_LOCKED 2U
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unsigned bh_flags; ///< BH_DIRTY or BH_LOCKED
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} bhdr_T;
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typedef enum {
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MF_DIRTY_NO = 0, ///< no dirty blocks
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MF_DIRTY_YES, ///< there are dirty blocks
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MF_DIRTY_YES_NOSYNC, ///< there are dirty blocks, do not sync yet
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} mfdirty_T;
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/// A memory file.
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typedef struct {
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char *mf_fname; ///< name of the file
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char *mf_ffname; ///< idem, full path
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int mf_fd; ///< file descriptor
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int mf_flags; ///< flags used when opening this memfile
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bool mf_reopen; ///< mf_fd was closed, retry opening
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bhdr_T *mf_free_first; ///< first block header in free list
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/// The used blocks are kept in mf_hash.
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/// mf_hash are used to quickly find a block in the used list.
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PMap(int64_t) mf_hash;
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/// When a block with a negative number is flushed to the file, it gets
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/// a positive number. Because the reference to the block is still the negative
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/// number, we remember the translation to the new positive number.
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Map(int64_t, int64_t) mf_trans;
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blocknr_T mf_blocknr_max; ///< highest positive block number + 1
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blocknr_T mf_blocknr_min; ///< lowest negative block number - 1
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blocknr_T mf_neg_count; ///< number of negative blocks numbers
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blocknr_T mf_infile_count; ///< number of pages in the file
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unsigned mf_page_size; ///< number of bytes in a page
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mfdirty_T mf_dirty;
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} memfile_T;
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