94 lines
2.8 KiB
C++
94 lines
2.8 KiB
C++
/*
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* Copyright 2015 gRPC authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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#include <grpcpp/completion_queue.h>
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#include <memory>
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#include <grpc/grpc.h>
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#include <grpc/support/log.h>
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#include <grpcpp/impl/grpc_library.h>
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#include <grpcpp/support/time.h>
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namespace grpc_impl {
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static ::grpc::internal::GrpcLibraryInitializer g_gli_initializer;
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// 'CompletionQueue' constructor can safely call GrpcLibraryCodegen(false) here
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// i.e not have GrpcLibraryCodegen call grpc_init(). This is because, to create
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// a 'grpc_completion_queue' instance (which is being passed as the input to
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// this constructor), one must have already called grpc_init().
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CompletionQueue::CompletionQueue(grpc_completion_queue* take)
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: GrpcLibraryCodegen(false), cq_(take) {
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InitialAvalanching();
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}
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void CompletionQueue::Shutdown() {
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g_gli_initializer.summon();
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CompleteAvalanching();
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}
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CompletionQueue::NextStatus CompletionQueue::AsyncNextInternal(
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void** tag, bool* ok, gpr_timespec deadline) {
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for (;;) {
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auto ev = grpc_completion_queue_next(cq_, deadline, nullptr);
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switch (ev.type) {
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case GRPC_QUEUE_TIMEOUT:
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return TIMEOUT;
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case GRPC_QUEUE_SHUTDOWN:
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return SHUTDOWN;
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case GRPC_OP_COMPLETE:
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auto core_cq_tag =
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static_cast<::grpc::internal::CompletionQueueTag*>(ev.tag);
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*ok = ev.success != 0;
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*tag = core_cq_tag;
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if (core_cq_tag->FinalizeResult(tag, ok)) {
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return GOT_EVENT;
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}
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break;
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}
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}
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}
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CompletionQueue::CompletionQueueTLSCache::CompletionQueueTLSCache(
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CompletionQueue* cq)
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: cq_(cq), flushed_(false) {
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grpc_completion_queue_thread_local_cache_init(cq_->cq_);
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}
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CompletionQueue::CompletionQueueTLSCache::~CompletionQueueTLSCache() {
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GPR_ASSERT(flushed_);
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}
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bool CompletionQueue::CompletionQueueTLSCache::Flush(void** tag, bool* ok) {
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int res = 0;
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void* res_tag;
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flushed_ = true;
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if (grpc_completion_queue_thread_local_cache_flush(cq_->cq_, &res_tag,
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&res)) {
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auto core_cq_tag =
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static_cast<::grpc::internal::CompletionQueueTag*>(res_tag);
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*ok = res == 1;
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if (core_cq_tag->FinalizeResult(tag, ok)) {
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return true;
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}
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}
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return false;
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}
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} // namespace grpc_impl
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