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/* SPDX-License-Identifier: LGPL-3.0-or-later */
/*
* internal.h
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#ifndef INTERNAL_H
#define INTERNAL_H
#include "config.h"
#include "sqfs/data_writer.h"
#include "sqfs/compress.h"
#include "sqfs/inode.h"
#include "sqfs/table.h"
#include "sqfs/error.h"
#include "sqfs/block.h"
#include "sqfs/io.h"
#include "util.h"
#include <string.h>
#include <stdlib.h>
#include <zlib.h>
#ifdef WITH_PTHREAD
#include <pthread.h>
#endif
#define MK_BLK_HASH(chksum, size) \
(((sqfs_u64)(size) << 32) | (sqfs_u64)(chksum))
#define INIT_BLOCK_COUNT (128)
typedef struct {
sqfs_u64 offset;
sqfs_u64 hash;
} blk_info_t;
typedef struct {
sqfs_u32 index;
sqfs_u32 offset;
sqfs_u64 hash;
} frag_info_t;
#ifdef WITH_PTHREAD
typedef struct {
sqfs_data_writer_t *shared;
sqfs_compressor_t *cmp;
pthread_t thread;
sqfs_u8 scratch[];
} compress_worker_t;
#endif
struct sqfs_data_writer_t {
/* synchronization primitives */
#ifdef WITH_PTHREAD
pthread_mutex_t mtx;
pthread_cond_t queue_cond;
pthread_cond_t done_cond;
#endif
/* needs rw access by worker and main thread */
sqfs_block_t *queue;
sqfs_block_t *queue_last;
sqfs_block_t *done;
size_t backlog;
int status;
/* used by main thread only */
sqfs_u32 enqueue_id;
sqfs_u32 dequeue_id;
unsigned int num_workers;
size_t max_backlog;
size_t devblksz;
sqfs_file_t *file;
sqfs_fragment_t *fragments;
size_t num_fragments;
size_t max_fragments;
sqfs_u64 start;
size_t file_start;
size_t num_blocks;
size_t max_blocks;
blk_info_t *blocks;
sqfs_compressor_t *cmp;
sqfs_block_t *frag_block;
frag_info_t *frag_list;
size_t frag_list_num;
size_t frag_list_max;
const sqfs_block_hooks_t *hooks;
void *user_ptr;
/* file API */
sqfs_inode_generic_t *inode;
sqfs_block_t *blk_current;
sqfs_u32 blk_flags;
size_t blk_index;
/* used only by workers */
size_t max_block_size;
#ifdef WITH_PTHREAD
compress_worker_t *workers[];
#else
sqfs_u8 scratch[];
#endif
};
SQFS_INTERNAL int process_completed_block(sqfs_data_writer_t *proc,
sqfs_block_t *block);
SQFS_INTERNAL
int process_completed_fragment(sqfs_data_writer_t *proc, sqfs_block_t *frag,
sqfs_block_t **blk_out);
SQFS_INTERNAL void free_blk_list(sqfs_block_t *list);
SQFS_INTERNAL
int data_writer_init(sqfs_data_writer_t *proc, size_t max_block_size,
sqfs_compressor_t *cmp, unsigned int num_workers,
size_t max_backlog, size_t devblksz, sqfs_file_t *file);
SQFS_INTERNAL void data_writer_cleanup(sqfs_data_writer_t *proc);
SQFS_INTERNAL
void data_writer_store_done(sqfs_data_writer_t *proc, sqfs_block_t *blk,
int status);
SQFS_INTERNAL
sqfs_block_t *data_writer_next_work_item(sqfs_data_writer_t *proc);
SQFS_INTERNAL
int data_writer_do_block(sqfs_block_t *block, sqfs_compressor_t *cmp,
sqfs_u8 *scratch, size_t scratch_size);
SQFS_INTERNAL
int test_and_set_status(sqfs_data_writer_t *proc, int status);
SQFS_INTERNAL
int data_writer_enqueue(sqfs_data_writer_t *proc, sqfs_block_t *block);
#endif /* INTERNAL_H */
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