Implement basic node.js binding (not published on npm yet)

node-binding/client.h

@@ -0,0 +1,142 @@
+// Copyright (c) Vitaliy Filippov, 2019+
+// License: VNPL-1.1 (see README.md for details)
+
+#ifndef NODE_VITASTOR_CLIENT_H
+#define NODE_VITASTOR_CLIENT_H
+
+#include <mutex>
+
+#include <nan.h>
+#include <vitastor_c.h>
+#include <vitastor_kv.h>
+
+class NodeVitastorRequest;
+
+class NodeVitastor: public Nan::ObjectWrap
+{
+public:
+    // constructor({ ...config })
+    static NAN_METHOD(Create);
+    // read(pool, inode, offset, len, callback(err, buffer, version))
+    static NAN_METHOD(Read);
+    // write(pool, inode, offset, buffer, { version }?, callback(err))
+    static NAN_METHOD(Write);
+    // sync(callback(err))
+    static NAN_METHOD(Sync);
+    // read_bitmap(pool, inode, offset, len, with_parents, callback(err, bitmap_buffer))
+    static NAN_METHOD(ReadBitmap);
+//    // destroy()
+//    static NAN_METHOD(Destroy);
+
+    ~NodeVitastor();
+
+private:
+    vitastor_c *c = NULL;
+    int eventfd = -1;
+    uv_poll_t poll_watcher;
+    // FIXME: Is it really needed?
+    std::mutex mu;
+
+    NodeVitastor();
+
+    static void on_io_readable(uv_poll_t* handle, int status, int revents);
+    static void on_read_finish(void *opaque, long retval, uint64_t version);
+    static void on_write_finish(void *opaque, long retval);
+    static void on_read_bitmap_finish(void *opaque, long retval, uint8_t *bitmap);
+
+    friend class NodeVitastorImage;
+    friend class NodeVitastorKV;
+    friend class NodeVitastorKVListing;
+};
+
+class NodeVitastorImage: public Nan::ObjectWrap
+{
+public:
+    // constructor(node_vitastor, name)
+    static NAN_METHOD(Create);
+    // read(offset, len, callback(err, buffer, version))
+    static NAN_METHOD(Read);
+    // write(offset, buffer, { version }?, callback(err))
+    static NAN_METHOD(Write);
+    // sync(callback(err))
+    static NAN_METHOD(Sync);
+    // read_bitmap(offset, len, with_parents, callback(err, bitmap_buffer))
+    static NAN_METHOD(ReadBitmap);
+    // get_info(callback({ num, name, size, parent_id?, readonly?, meta?, mod_revision, block_size, bitmap_granularity, immediate_commit }))
+    static NAN_METHOD(GetInfo);
+
+    ~NodeVitastorImage();
+
+private:
+    NodeVitastor *cli = NULL;
+    std::string name;
+    void *watch = NULL;
+    std::vector<NodeVitastorRequest*> on_init;
+    Nan::Persistent<v8::Object> cliObj;
+
+    NodeVitastorImage();
+
+    static void on_watch_start(void *opaque, long retval);
+    void exec_request(NodeVitastorRequest *req);
+    void exec_or_wait(NodeVitastorRequest *req);
+};
+
+class NodeVitastorKV: public Nan::ObjectWrap
+{
+public:
+    // constructor(node_vitastor)
+    static NAN_METHOD(Create);
+    // open(inode_id, { ...config }, callback(err))
+    static NAN_METHOD(Open);
+    // set_config({ ...config })
+    static NAN_METHOD(SetConfig);
+    // close(callback())
+    static NAN_METHOD(Close);
+    // get_size()
+    static NAN_METHOD(GetSize);
+    // get(key, callback(err, value))
+    static NAN_METHOD(Get);
+    // get_cached(key, callback(err, value))
+    static NAN_METHOD(GetCached);
+    // set(key, value, callback(err), cas_compare(old_value))
+    static NAN_METHOD(Set);
+    // del(key, callback(err), cas_compare(old_value))
+    static NAN_METHOD(Del);
+    // list(start_key?)
+    static NAN_METHOD(List);
+
+    ~NodeVitastorKV();
+
+    static Nan::Persistent<v8::Function> listing_class;
+
+private:
+    NodeVitastor *cli = NULL;
+    vitastorkv_dbw_t *dbw = NULL;
+
+    NodeVitastorKV();
+
+    static void get_impl(const Nan::FunctionCallbackInfo<v8::Value> & info, bool allow_cache);
+
+    friend class NodeVitastorKVListing;
+};
+
+class NodeVitastorKVListing: public Nan::ObjectWrap
+{
+public:
+    // constructor(node_vitastor_kv, start_key?)
+    static NAN_METHOD(Create);
+    // next(callback(err, value))
+    static NAN_METHOD(Next);
+    // close()
+    static NAN_METHOD(Close);
+
+    ~NodeVitastorKVListing();
+
+private:
+    NodeVitastorKV *kv = NULL;
+    void *handle = NULL;
+
+    NodeVitastorKVListing();
+};
+
+#endif