Initial checkin of gRPC to third_party/

third_party/grpc/src/core/surface/init.c

+/*
+ *
+ * Copyright 2015-2016, 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/support/port_platform.h>
+
+#include <memory.h>
+
+#include <grpc/census.h>
+#include <grpc/grpc.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/time.h>
+#include "src/core/channel/channel_stack.h"
+#include "src/core/client_config/lb_policy_registry.h"
+#include "src/core/client_config/lb_policies/pick_first.h"
+#include "src/core/client_config/lb_policies/round_robin.h"
+#include "src/core/client_config/resolver_registry.h"
+#include "src/core/client_config/resolvers/dns_resolver.h"
+#include "src/core/client_config/resolvers/sockaddr_resolver.h"
+#include "src/core/client_config/subchannel.h"
+#include "src/core/client_config/subchannel_index.h"
+#include "src/core/debug/trace.h"
+#include "src/core/iomgr/executor.h"
+#include "src/core/iomgr/iomgr.h"
+#include "src/core/profiling/timers.h"
+#include "src/core/surface/api_trace.h"
+#include "src/core/surface/call.h"
+#include "src/core/surface/completion_queue.h"
+#include "src/core/surface/init.h"
+#include "src/core/surface/surface_trace.h"
+#include "src/core/transport/chttp2_transport.h"
+#include "src/core/transport/connectivity_state.h"
+
+#ifndef GRPC_DEFAULT_NAME_PREFIX
+#define GRPC_DEFAULT_NAME_PREFIX "dns:///"
+#endif
+
+#define MAX_PLUGINS 128
+
+static gpr_once g_basic_init = GPR_ONCE_INIT;
+static gpr_mu g_init_mu;
+static int g_initializations;
+
+static void do_basic_init(void) {
+  gpr_mu_init(&g_init_mu);
+  g_initializations = 0;
+}
+
+typedef struct grpc_plugin {
+  void (*init)();
+  void (*destroy)();
+} grpc_plugin;
+
+static grpc_plugin g_all_of_the_plugins[MAX_PLUGINS];
+static int g_number_of_plugins = 0;
+
+void grpc_register_plugin(void (*init)(void), void (*destroy)(void)) {
+  GRPC_API_TRACE("grpc_register_plugin(init=%p, destroy=%p)", 2,
+                 ((void*)(intptr_t)init, (void*)(intptr_t)destroy));
+  GPR_ASSERT(g_number_of_plugins != MAX_PLUGINS);
+  g_all_of_the_plugins[g_number_of_plugins].init = init;
+  g_all_of_the_plugins[g_number_of_plugins].destroy = destroy;
+  g_number_of_plugins++;
+}
+
+void grpc_init(void) {
+  int i;
+  gpr_once_init(&g_basic_init, do_basic_init);
+
+  gpr_mu_lock(&g_init_mu);
+  if (++g_initializations == 1) {
+    gpr_time_init();
+    grpc_mdctx_global_init();
+    grpc_lb_policy_registry_init(grpc_pick_first_lb_factory_create());
+    grpc_register_lb_policy(grpc_pick_first_lb_factory_create());
+    grpc_register_lb_policy(grpc_round_robin_lb_factory_create());
+    grpc_resolver_registry_init(GRPC_DEFAULT_NAME_PREFIX);
+    grpc_register_resolver_type(grpc_dns_resolver_factory_create());
+    grpc_register_resolver_type(grpc_ipv4_resolver_factory_create());
+    grpc_register_resolver_type(grpc_ipv6_resolver_factory_create());
+#ifdef GPR_POSIX_SOCKET
+    grpc_register_resolver_type(grpc_unix_resolver_factory_create());
+#endif
+    grpc_register_tracer("api", &grpc_api_trace);
+    grpc_register_tracer("channel", &grpc_trace_channel);
+    grpc_register_tracer("http", &grpc_http_trace);
+    grpc_register_tracer("flowctl", &grpc_flowctl_trace);
+    grpc_register_tracer("connectivity_state", &grpc_connectivity_state_trace);
+    grpc_security_pre_init();
+    grpc_iomgr_init();
+    grpc_executor_init();
+    grpc_tracer_init("GRPC_TRACE");
+    /* Only initialize census if no one else has and some features are
+     * available. */
+    if (census_enabled() == CENSUS_FEATURE_NONE &&
+        census_supported() != CENSUS_FEATURE_NONE) {
+      if (census_initialize(census_supported())) { /* enable all features. */
+        gpr_log(GPR_ERROR, "Could not initialize census.");
+      }
+    }
+    gpr_timers_global_init();
+    grpc_cq_global_init();
+    grpc_subchannel_index_init();
+    for (i = 0; i < g_number_of_plugins; i++) {
+      if (g_all_of_the_plugins[i].init != NULL) {
+        g_all_of_the_plugins[i].init();
+      }
+    }
+  }
+  gpr_mu_unlock(&g_init_mu);
+  GRPC_API_TRACE("grpc_init(void)", 0, ());
+}
+
+void grpc_shutdown(void) {
+  int i;
+  GRPC_API_TRACE("grpc_shutdown(void)", 0, ());
+  gpr_mu_lock(&g_init_mu);
+  if (--g_initializations == 0) {
+    grpc_executor_shutdown();
+    grpc_cq_global_shutdown();
+    grpc_iomgr_shutdown();
+    grpc_subchannel_index_shutdown();
+    census_shutdown();
+    gpr_timers_global_destroy();
+    grpc_tracer_shutdown();
+    grpc_resolver_registry_shutdown();
+    grpc_lb_policy_registry_shutdown();
+    for (i = 0; i < g_number_of_plugins; i++) {
+      if (g_all_of_the_plugins[i].destroy != NULL) {
+        g_all_of_the_plugins[i].destroy();
+      }
+    }
+    grpc_mdctx_global_shutdown();
+  }
+  gpr_mu_unlock(&g_init_mu);
+}
+
+int grpc_is_initialized(void) {
+  int r;
+  gpr_once_init(&g_basic_init, do_basic_init);
+  gpr_mu_lock(&g_init_mu);
+  r = g_initializations > 0;
+  gpr_mu_unlock(&g_init_mu);
+  return r;
+}