Built motion from commit 6a09e18b.|2.6.11

[motion2.git] / legacy-libs / grpc-cloned / deps / grpc / src / core / ext / filters / client_channel / resolver / dns / c_ares / grpc_ares_ev_driver_posix.cc

diff --git a/legacy-libs/grpc-cloned/deps/grpc/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver_posix.cc b/legacy-libs/grpc-cloned/deps/grpc/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver_posix.cc
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+++ b/legacy-libs/grpc-cloned/deps/grpc/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver_posix.cc
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+/*
+ *
+ * Copyright 2016 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+#include <grpc/support/port_platform.h>
+
+#include "src/core/lib/iomgr/port.h"
+#if GRPC_ARES == 1 && defined(GRPC_POSIX_SOCKET_ARES_EV_DRIVER)
+
+#include <ares.h>
+#include <string.h>
+#include <sys/ioctl.h>
+
+#include "src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver.h"
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+#include <grpc/support/time.h>
+#include "src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.h"
+#include "src/core/lib/gpr/string.h"
+#include "src/core/lib/iomgr/ev_posix.h"
+#include "src/core/lib/iomgr/iomgr_internal.h"
+#include "src/core/lib/iomgr/sockaddr_utils.h"
+
+namespace grpc_core {
+
+class GrpcPolledFdPosix : public GrpcPolledFd {
+ public:
+  GrpcPolledFdPosix(ares_socket_t as, grpc_pollset_set* driver_pollset_set)
+      : as_(as) {
+    gpr_asprintf(&name_, "c-ares fd: %d", (int)as);
+    fd_ = grpc_fd_create((int)as, name_, false);
+    driver_pollset_set_ = driver_pollset_set;
+    grpc_pollset_set_add_fd(driver_pollset_set_, fd_);
+  }
+
+  ~GrpcPolledFdPosix() {
+    gpr_free(name_);
+    grpc_pollset_set_del_fd(driver_pollset_set_, fd_);
+    /* c-ares library will close the fd inside grpc_fd. This fd may be picked up
+       immediately by another thread, and should not be closed by the following
+       grpc_fd_orphan. */
+    int dummy_release_fd;
+    grpc_fd_orphan(fd_, nullptr, &dummy_release_fd, "c-ares query finished");
+  }
+
+  void RegisterForOnReadableLocked(grpc_closure* read_closure) override {
+    grpc_fd_notify_on_read(fd_, read_closure);
+  }
+
+  void RegisterForOnWriteableLocked(grpc_closure* write_closure) override {
+    grpc_fd_notify_on_write(fd_, write_closure);
+  }
+
+  bool IsFdStillReadableLocked() override {
+    size_t bytes_available = 0;
+    return ioctl(grpc_fd_wrapped_fd(fd_), FIONREAD, &bytes_available) == 0 &&
+           bytes_available > 0;
+  }
+
+  void ShutdownLocked(grpc_error* error) override {
+    grpc_fd_shutdown(fd_, error);
+  }
+
+  ares_socket_t GetWrappedAresSocketLocked() override { return as_; }
+
+  const char* GetName() override { return name_; }
+
+  char* name_;
+  ares_socket_t as_;
+  grpc_fd* fd_;
+  grpc_pollset_set* driver_pollset_set_;
+};
+
+class GrpcPolledFdFactoryPosix : public GrpcPolledFdFactory {
+ public:
+  GrpcPolledFd* NewGrpcPolledFdLocked(ares_socket_t as,
+                                      grpc_pollset_set* driver_pollset_set,
+                                      grpc_combiner* combiner) override {
+    return New<GrpcPolledFdPosix>(as, driver_pollset_set);
+  }
+
+  void ConfigureAresChannelLocked(ares_channel channel) override {}
+};
+
+UniquePtr<GrpcPolledFdFactory> NewGrpcPolledFdFactory(grpc_combiner* combiner) {
+  return UniquePtr<GrpcPolledFdFactory>(New<GrpcPolledFdFactoryPosix>());
+}
+
+}  // namespace grpc_core
+
+#endif /* GRPC_ARES == 1 && defined(GRPC_POSIX_SOCKET_ARES_EV_DRIVER) */