mirror of https://github.com/grpc/grpc.git
Vijay Pai
6 years ago
parent
830e5ad5df
commit
9e6511ae2e
20 changed files with 156 additions and 245 deletions
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/*
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* |
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* Copyright 2018 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 <functional> |
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#include <grpcpp/impl/codegen/callback_common.h> |
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#include <grpcpp/impl/codegen/status.h> |
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#include "src/core/lib/gprpp/memory.h" |
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#include "src/core/lib/surface/completion_queue.h" |
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namespace grpc { |
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namespace internal { |
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namespace { |
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template <class Func, class Arg> |
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void CatchingCallback(Func&& func, Arg&& arg) { |
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#if GRPC_ALLOW_EXCEPTIONS |
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try { |
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func(arg); |
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} catch (...) { |
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// nothing to return or change here, just don't crash the library
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} |
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#else // GRPC_ALLOW_EXCEPTIONS
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func(arg); |
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#endif // GRPC_ALLOW_EXCEPTIONS
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} |
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class CallbackWithSuccessImpl : public grpc_core::CQCallbackInterface { |
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public: |
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static void operator delete(void* ptr, std::size_t size) { |
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assert(size == sizeof(CallbackWithSuccessImpl)); |
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} |
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// This operator should never be called as the memory should be freed as part
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// of the arena destruction. It only exists to provide a matching operator
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// delete to the operator new so that some compilers will not complain (see
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// https://github.com/grpc/grpc/issues/11301) Note at the time of adding this
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// there are no tests catching the compiler warning.
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static void operator delete(void*, void*) { assert(0); } |
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CallbackWithSuccessImpl(grpc_call* call, CallbackWithSuccessTag* parent, |
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std::function<void(bool)> f) |
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: call_(call), parent_(parent), func_(std::move(f)) { |
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grpc_call_ref(call); |
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} |
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void Run(bool ok) override { |
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void* ignored = parent_->ops(); |
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bool new_ok = ok; |
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GPR_ASSERT(parent_->ops()->FinalizeResult(&ignored, &new_ok)); |
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GPR_ASSERT(ignored == parent_->ops()); |
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// Last use of func_, so ok to move it out for rvalue call above
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CatchingCallback(std::move(func_), ok); |
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func_ = nullptr; // reset to clear this out for sure
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grpc_call_unref(call_); |
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} |
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private: |
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grpc_call* call_; |
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CallbackWithSuccessTag* parent_; |
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std::function<void(bool)> func_; |
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}; |
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class CallbackWithStatusImpl : public grpc_core::CQCallbackInterface { |
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public: |
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static void operator delete(void* ptr, std::size_t size) { |
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assert(size == sizeof(CallbackWithStatusImpl)); |
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} |
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// This operator should never be called as the memory should be freed as part
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// of the arena destruction. It only exists to provide a matching operator
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// delete to the operator new so that some compilers will not complain (see
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// https://github.com/grpc/grpc/issues/11301) Note at the time of adding this
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// there are no tests catching the compiler warning.
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static void operator delete(void*, void*) { assert(0); } |
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CallbackWithStatusImpl(grpc_call* call, CallbackWithStatusTag* parent, |
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std::function<void(Status)> f) |
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: call_(call), parent_(parent), func_(std::move(f)), status_() { |
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grpc_call_ref(call); |
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} |
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void Run(bool ok) override { |
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void* ignored = parent_->ops(); |
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GPR_ASSERT(parent_->ops()->FinalizeResult(&ignored, &ok)); |
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GPR_ASSERT(ignored == parent_->ops()); |
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// Last use of func_ or status_, so ok to move them out
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CatchingCallback(std::move(func_), std::move(status_)); |
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func_ = nullptr; // reset to clear this out for sure
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grpc_call_unref(call_); |
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} |
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Status* status_ptr() { return &status_; } |
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private: |
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grpc_call* call_; |
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CallbackWithStatusTag* parent_; |
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std::function<void(Status)> func_; |
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Status status_; |
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}; |
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} // namespace
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CallbackWithSuccessTag::CallbackWithSuccessTag(grpc_call* call, |
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std::function<void(bool)> f, |
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CompletionQueueTag* ops) |
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: impl_(new (grpc_call_arena_alloc(call, sizeof(CallbackWithSuccessImpl))) |
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CallbackWithSuccessImpl(call, this, std::move(f))), |
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ops_(ops) {} |
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void CallbackWithSuccessTag::force_run(bool ok) { impl_->Run(ok); } |
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CallbackWithStatusTag::CallbackWithStatusTag(grpc_call* call, |
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std::function<void(Status)> f, |
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CompletionQueueTag* ops) |
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: ops_(ops) { |
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auto* impl = new (grpc_call_arena_alloc(call, sizeof(CallbackWithStatusImpl))) |
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CallbackWithStatusImpl(call, this, std::move(f)); |
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impl_ = impl; |
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status_ = impl->status_ptr(); |
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} |
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void CallbackWithStatusTag::force_run(Status s) { |
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*status_ = std::move(s); |
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impl_->Run(true); |
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} |
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} // namespace internal
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} // namespace grpc
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