| /* |
| * Copyright 2015, Google Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| */ |
| |
| #include <grpc++/completion_queue.h> |
| |
| #include <memory> |
| |
| #include <grpc/grpc.h> |
| #include <grpc/support/log.h> |
| #include "src/cpp/util/time.h" |
| |
| namespace grpc { |
| |
| CompletionQueue::CompletionQueue() { cq_ = grpc_completion_queue_create(); } |
| |
| CompletionQueue::CompletionQueue(grpc_completion_queue* take) : cq_(take) {} |
| |
| CompletionQueue::~CompletionQueue() { grpc_completion_queue_destroy(cq_); } |
| |
| void CompletionQueue::Shutdown() { grpc_completion_queue_shutdown(cq_); } |
| |
| // Helper class so we can declare a unique_ptr with grpc_event |
| class EventDeleter { |
| public: |
| void operator()(grpc_event* ev) { |
| if (ev) grpc_event_finish(ev); |
| } |
| }; |
| |
| CompletionQueue::NextStatus CompletionQueue::AsyncNextInternal( |
| void** tag, bool* ok, gpr_timespec deadline) { |
| std::unique_ptr<grpc_event, EventDeleter> ev; |
| |
| for (;;) { |
| ev.reset(grpc_completion_queue_next(cq_, deadline)); |
| if (!ev) { /* got a NULL back because deadline passed */ |
| return TIMEOUT; |
| } |
| if (ev->type == GRPC_QUEUE_SHUTDOWN) { |
| return SHUTDOWN; |
| } |
| auto cq_tag = static_cast<CompletionQueueTag*>(ev->tag); |
| *ok = ev->data.op_complete == GRPC_OP_OK; |
| *tag = cq_tag; |
| if (cq_tag->FinalizeResult(tag, ok)) { |
| return GOT_EVENT; |
| } |
| } |
| } |
| |
| CompletionQueue::NextStatus CompletionQueue::AsyncNext( |
| void** tag, bool* ok, std::chrono::system_clock::time_point deadline) { |
| gpr_timespec gpr_deadline; |
| Timepoint2Timespec(deadline, &gpr_deadline); |
| return AsyncNextInternal(tag, ok, gpr_deadline); |
| } |
| |
| bool CompletionQueue::Pluck(CompletionQueueTag* tag) { |
| std::unique_ptr<grpc_event, EventDeleter> ev; |
| |
| ev.reset(grpc_completion_queue_pluck(cq_, tag, gpr_inf_future)); |
| bool ok = ev->data.op_complete == GRPC_OP_OK; |
| void* ignored = tag; |
| GPR_ASSERT(tag->FinalizeResult(&ignored, &ok)); |
| GPR_ASSERT(ignored == tag); |
| // Ignore mutations by FinalizeResult: Pluck returns the C API status |
| return ev->data.op_complete == GRPC_OP_OK; |
| } |
| |
| void CompletionQueue::TryPluck(CompletionQueueTag* tag) { |
| std::unique_ptr<grpc_event, EventDeleter> ev; |
| |
| ev.reset(grpc_completion_queue_pluck(cq_, tag, gpr_inf_past)); |
| if (!ev) return; |
| bool ok = ev->data.op_complete == GRPC_OP_OK; |
| void* ignored = tag; |
| // the tag must be swallowed if using TryPluck |
| GPR_ASSERT(!tag->FinalizeResult(&ignored, &ok)); |
| } |
| |
| } // namespace grpc |