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/*
*
* Copyright 2016 gRPC authors.
*
* 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 <grpc/grpc.h>
#include <node.h>
#include <uv.h>
#include <v8.h>
#include "call.h"
#include "completion_queue.h"
namespace grpc {
namespace node {
using v8::Local;
using v8::Object;
using v8::Value;
grpc_completion_queue *queue;
uv_prepare_t prepare;
int pending_batches;
void drain_completion_queue(uv_prepare_t *handle) {
Nan::HandleScope scope;
grpc_event event;
(void)handle;
do {
event = grpc_completion_queue_next(queue, gpr_inf_past(GPR_CLOCK_MONOTONIC),
NULL);
if (event.type == GRPC_OP_COMPLETE) {
const char *error_message;
if (event.success) {
error_message = NULL;
} else {
error_message = "The async function encountered an error";
}
CompleteTag(event.tag, error_message);
grpc::node::DestroyTag(event.tag);
pending_batches--;
if (pending_batches == 0) {
uv_prepare_stop(&prepare);
}
}
} while (event.type != GRPC_QUEUE_TIMEOUT);
}
grpc_completion_queue *GetCompletionQueue() { return queue; }
void CompletionQueueNext() {
if (pending_batches == 0) {
GPR_ASSERT(!uv_is_active((uv_handle_t *)&prepare));
uv_prepare_start(&prepare, drain_completion_queue);
}
pending_batches++;
}
void CompletionQueueInit(Local<Object> exports) {
queue = grpc_completion_queue_create_for_next(NULL);
uv_prepare_init(uv_default_loop(), &prepare);
pending_batches = 0;
}
} // namespace node
} // namespace grpc
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