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 * in the documentation and/or other materials provided with the
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#include <grpc++/client_context.h>

#include <grpc/grpc.h>
#include "src/cpp/util/time.h"

using std::chrono::system_clock;

namespace grpc {

ClientContext::ClientContext()
    : initial_metadata_received_(false),
      call_(nullptr),
      cq_(nullptr),
      absolute_deadline_(gpr_inf_future) {}

ClientContext::~ClientContext() {
  if (call_) {
    grpc_call_destroy(call_);
  }
  if (cq_) {
    grpc_completion_queue_shutdown(cq_);
    // Drain cq_.
    grpc_event* ev;
    grpc_completion_type t;
    do {
      ev = grpc_completion_queue_next(cq_, gpr_inf_future);
      t = ev->type;
      grpc_event_finish(ev);
    } while (t != GRPC_QUEUE_SHUTDOWN);
    grpc_completion_queue_destroy(cq_);
  }
}

void ClientContext::set_absolute_deadline(
    const system_clock::time_point& deadline) {
  Timepoint2Timespec(deadline, &absolute_deadline_);
}

system_clock::time_point ClientContext::absolute_deadline() {
  return Timespec2Timepoint(absolute_deadline_);
}

void ClientContext::AddMetadata(const grpc::string& meta_key,
                                const grpc::string& meta_value) {
  send_initial_metadata_.insert(std::make_pair(meta_key, meta_value));
}

void ClientContext::TryCancel() {
  if (call_) {
    grpc_call_cancel(call_);
  }
}

}  // namespace grpc