1 files changed, 137 insertions, 0 deletions
diff --git a/lib/sqfs/data_writer/internal.h b/lib/sqfs/data_writer/internal.h
new file mode 100644
index 0000000..10cc82c
--- /dev/null
+++ b/lib/sqfs/data_writer/internal.h
@@ -0,0 +1,137 @@
+/* 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/data.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) \
+	(((uint64_t)(size) << 32) | (uint64_t)(chksum))
+
+#define INIT_BLOCK_COUNT (128)
+
+
+typedef struct {
+	uint64_t offset;
+	uint64_t hash;
+} blk_info_t;
+
+typedef struct {
+	uint32_t index;
+	uint32_t offset;
+	uint64_t hash;
+} frag_info_t;
+
+
+#ifdef WITH_PTHREAD
+typedef struct {
+	sqfs_data_writer_t *shared;
+	sqfs_compressor_t *cmp;
+	pthread_t thread;
+	uint8_t 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 */
+	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;
+
+	sqfs_block_t *frag_block;
+	frag_info_t *frag_list;
+	size_t frag_list_num;
+	size_t frag_list_max;
+
+	/* used only by workers */
+	size_t max_block_size;
+
+#ifdef WITH_PTHREAD
+	compress_worker_t *workers[];
+#else
+	uint8_t 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,
+			 uint8_t *scratch, size_t scratch_size);
+
+#endif /* INTERNAL_H */