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/*
*
* 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++/server_context.h>
#include <mutex>
#include <grpc++/impl/call.h>
#include <grpc/grpc.h>
#include <grpc/support/log.h>
#include "src/cpp/util/time.h"
namespace grpc {
// CompletionOp
class ServerContext::CompletionOp GRPC_FINAL : public CallOpBuffer {
public:
// initial refs: one in the server context, one in the cq
CompletionOp() : refs_(2), finalized_(false), cancelled_(false) {
AddServerRecvClose(&cancelled_);
}
bool FinalizeResult(void** tag, bool* status) GRPC_OVERRIDE;
bool CheckCancelled(CompletionQueue* cq);
void Unref();
private:
std::mutex mu_;
int refs_;
bool finalized_;
bool cancelled_;
};
void ServerContext::CompletionOp::Unref() {
std::unique_lock<std::mutex> lock(mu_);
if (--refs_ == 0) {
lock.unlock();
delete this;
}
}
bool ServerContext::CompletionOp::CheckCancelled(CompletionQueue* cq) {
cq->TryPluck(this);
std::lock_guard<std::mutex> g(mu_);
return finalized_ ? cancelled_ : false;
}
bool ServerContext::CompletionOp::FinalizeResult(void** tag, bool* status) {
GPR_ASSERT(CallOpBuffer::FinalizeResult(tag, status));
std::unique_lock<std::mutex> lock(mu_);
finalized_ = true;
if (!*status) cancelled_ = true;
if (--refs_ == 0) {
lock.unlock();
delete this;
}
return false;
}
// ServerContext body
ServerContext::ServerContext()
: completion_op_(nullptr),
call_(nullptr),
sent_initial_metadata_(false) {}
ServerContext::ServerContext(gpr_timespec deadline, grpc_metadata* metadata,
size_t metadata_count)
: completion_op_(nullptr),
deadline_(Timespec2Timepoint(deadline)),
call_(nullptr),
sent_initial_metadata_(false) {
for (size_t i = 0; i < metadata_count; i++) {
client_metadata_.insert(std::make_pair(
grpc::string(metadata[i].key),
grpc::string(metadata[i].value,
metadata[i].value + metadata[i].value_length)));
}
}
ServerContext::~ServerContext() {
if (call_) {
grpc_call_destroy(call_);
}
if (completion_op_) {
completion_op_->Unref();
}
}
void ServerContext::BeginCompletionOp(Call* call) {
GPR_ASSERT(!completion_op_);
completion_op_ = new CompletionOp();
call->PerformOps(completion_op_);
}
void ServerContext::AddInitialMetadata(const grpc::string& key,
const grpc::string& value) {
initial_metadata_.insert(std::make_pair(key, value));
}
void ServerContext::AddTrailingMetadata(const grpc::string& key,
const grpc::string& value) {
trailing_metadata_.insert(std::make_pair(key, value));
}
} // namespace grpc
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