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#ifndef INTERNAL_H
#define INTERNAL_H

#include "config.h"
#include "sqfs/predef.h"

#include "sqfs/block_processor.h"
#include "sqfs/compress.h"
#include "sqfs/inode.h"
#include "sqfs/table.h"
#include "sqfs/error.h"
#include "sqfs/data.h"
#include "sqfs/io.h"
#include "util.h"

#include <string.h>
#include <stdlib.h>

#ifdef WITH_PTHREAD
#include <pthread.h>
#endif


#define MK_BLK_SIG(chksum, size) \
	(((uint64_t)(size) << 32) | (uint64_t)(chksum))

#define BLK_SIZE(sig) ((sig) >> 32)

#define INIT_BLOCK_COUNT (128)


typedef struct {
	uint64_t offset;
	uint64_t signature;
} blk_info_t;


#ifdef WITH_PTHREAD
typedef struct {
	sqfs_block_processor_t *shared;
	sqfs_compressor_t *cmp;
	pthread_t thread;
	uint8_t scratch[];
} compress_worker_t;
#endif

struct sqfs_block_processor_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;
	bool terminate;
	size_t backlog;
	int status;

	/* used by main thread only */
	uint32_t enqueue_id;
	uint32_t 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;

	uint64_t start;

	size_t file_start;
	size_t num_blocks;
	size_t max_blocks;
	blk_info_t *blocks;
	sqfs_compressor_t *cmp;

	/* used only by workers */
	size_t max_block_size;

#ifdef WITH_PTHREAD
	compress_worker_t *workers[];
#else
	uint8_t scratch[];
#endif
};

SQFS_INTERNAL
int sqfs_block_process(sqfs_block_t *block, sqfs_compressor_t *cmp,
		       uint8_t *scratch, size_t scratch_size);

SQFS_INTERNAL int process_completed_block(sqfs_block_processor_t *proc,
					  sqfs_block_t *block);

SQFS_INTERNAL int grow_fragment_table(sqfs_block_processor_t *proc,
				      size_t index);

SQFS_INTERNAL size_t deduplicate_blocks(sqfs_block_processor_t *proc,
					size_t count);

SQFS_INTERNAL int store_block_location(sqfs_block_processor_t *proc,
				       uint64_t offset, uint32_t size,
				       uint32_t chksum);

#endif /* INTERNAL_H */