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/*

Copyright (c) DataStax, Inc.

Licensed under the Apache License, Version 2.0 (the "License");

you may not use this file except in compliance with the License.

You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software

distributed under the License is distributed on an "AS IS" BASIS,

WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

See the License for the specific language governing permissions and

limitations under the License.

*/

#include "async.hpp"

#include "memory.hpp"

namespace cass {

Async::Async()

: handle_(NULL) { }

Async::~Async() {

close_handle();

}

int Async::start(uv_loop_t* loop, const Async::Callback& callback) {

if (handle_ == NULL) {

handle_ = Memory::allocate<uv_async_t>();

handle_->data = this;

int rc = uv_async_init(loop, handle_, on_async);

if (rc != 0) return rc;

}

callback_ = callback;

return 0;

}

void Async::send() {

if (handle_ == NULL) return;

uv_async_send(handle_);

}

void Async::close_handle() {

if (handle_ == NULL) return;

uv_close(reinterpret_cast<uv_handle_t*>(handle_), on_close);

handle_ = NULL;

}

bool Async::is_running() const {

if (handle_ == NULL) return false;

return uv_is_active(reinterpret_cast<uv_handle_t*>(handle_)) != 0;

}

void Async::on_async(uv_async_t* handle) {

Async* async = static_cast<Async*>(handle->data);

async->callback_(async);

}

void Async::on_close(uv_handle_t* handle) {

Memory::deallocate(reinterpret_cast<uv_async_t*>(handle));

}

} // namespace cass