Move C/C++ sources to src subdirectory

src/blockstore_flush.h

@@ -0,0 +1,112 @@
+// Copyright (c) Vitaliy Filippov, 2019+
+// License: VNPL-1.1 (see README.md for details)
+
+struct copy_buffer_t
+{
+    uint64_t offset, len;
+    void *buf;
+};
+
+struct meta_sector_t
+{
+    uint64_t offset, len;
+    int state;
+    void *buf;
+    int usage_count;
+};
+
+struct flusher_sync_t
+{
+    bool fsync_meta;
+    int ready_count;
+    int state;
+};
+
+struct flusher_meta_write_t
+{
+    uint64_t sector, pos;
+    bool submitted;
+    void *buf;
+    std::map<uint64_t, meta_sector_t>::iterator it;
+};
+
+class journal_flusher_t;
+
+// Journal flusher coroutine
+class journal_flusher_co
+{
+    blockstore_impl_t *bs;
+    journal_flusher_t *flusher;
+    int wait_state, wait_count;
+    struct io_uring_sqe *sqe;
+    struct ring_data_t *data;
+
+    std::list<flusher_sync_t>::iterator cur_sync;
+
+    obj_ver_id cur;
+    std::map<obj_ver_id, dirty_entry>::iterator dirty_it, dirty_start, dirty_end;
+    std::map<object_id, uint64_t>::iterator repeat_it;
+    std::function<void(ring_data_t*)> simple_callback_r, simple_callback_w;
+
+    bool skip_copy, has_delete, has_writes;
+    blockstore_clean_db_t::iterator clean_it;
+    std::vector<copy_buffer_t> v;
+    std::vector<copy_buffer_t>::iterator it;
+    int copy_count;
+    uint64_t clean_loc, old_clean_loc;
+    flusher_meta_write_t meta_old, meta_new;
+    bool clean_init_bitmap;
+    uint64_t clean_bitmap_offset, clean_bitmap_len;
+    void *new_clean_bitmap;
+
+    uint64_t new_trim_pos;
+
+    // local: scan_dirty()
+    uint64_t offset, end_offset, submit_offset, submit_len;
+
+    friend class journal_flusher_t;
+    bool scan_dirty(int wait_base);
+    bool modify_meta_read(uint64_t meta_loc, flusher_meta_write_t &wr, int wait_base);
+    void update_clean_db();
+    bool fsync_batch(bool fsync_meta, int wait_base);
+    void bitmap_set(void *bitmap, uint64_t start, uint64_t len);
+public:
+    journal_flusher_co();
+    bool loop();
+};
+
+// Journal flusher itself
+class journal_flusher_t
+{
+    int trim_wanted = 0;
+    bool dequeuing;
+    int flusher_count;
+    int flusher_start_threshold;
+    journal_flusher_co *co;
+    blockstore_impl_t *bs;
+    friend class journal_flusher_co;
+
+    int journal_trim_counter, journal_trim_interval;
+    bool trimming;
+    void* journal_superblock;
+
+    int active_flushers;
+    int syncing_flushers;
+    std::list<flusher_sync_t> syncs;
+    std::map<object_id, uint64_t> sync_to_repeat;
+
+    std::map<uint64_t, meta_sector_t> meta_sectors;
+    std::deque<object_id> flush_queue;
+    std::map<object_id, uint64_t> flush_versions;
+public:
+    journal_flusher_t(int flusher_count, blockstore_impl_t *bs);
+    ~journal_flusher_t();
+    void loop();
+    bool is_active();
+    void mark_trim_possible();
+    void request_trim();
+    void release_trim();
+    void enqueue_flush(obj_ver_id oid);
+    void unshift_flush(obj_ver_id oid, bool force);
+    void remove_flush(object_id oid);
+};