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/*
*
* Copyright 2015 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 <limits.h>
#include <memory.h>
#include <grpc/fork.h>
#include <grpc/grpc.h>
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include <grpc/support/time.h>
#include "src/core/lib/channel/channel_stack.h"
#include "src/core/lib/channel/connected_channel.h"
#include "src/core/lib/channel/handshaker_registry.h"
#include "src/core/lib/debug/stats.h"
#include "src/core/lib/debug/trace.h"
#include "src/core/lib/gpr/fork.h"
#include "src/core/lib/gpr/thd_internal.h"
#include "src/core/lib/http/parser.h"
#include "src/core/lib/iomgr/call_combiner.h"
#include "src/core/lib/iomgr/combiner.h"
#include "src/core/lib/iomgr/executor.h"
#include "src/core/lib/iomgr/iomgr.h"
#include "src/core/lib/iomgr/resource_quota.h"
#include "src/core/lib/iomgr/timer_manager.h"
#include "src/core/lib/profiling/timers.h"
#include "src/core/lib/slice/slice_internal.h"
#include "src/core/lib/surface/api_trace.h"
#include "src/core/lib/surface/call.h"
#include "src/core/lib/surface/channel_init.h"
#include "src/core/lib/surface/completion_queue.h"
#include "src/core/lib/surface/init.h"
#include "src/core/lib/surface/lame_client.h"
#include "src/core/lib/surface/server.h"
#include "src/core/lib/transport/bdp_estimator.h"
#include "src/core/lib/transport/connectivity_state.h"
#include "src/core/lib/transport/transport_impl.h"
/* (generated) built in registry of plugins */
extern void grpc_register_built_in_plugins(void);
#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_log_verbosity_init();
grpc_fork_support_init();
gpr_mu_init(&g_init_mu);
grpc_register_built_in_plugins();
grpc_cq_global_init();
g_initializations = 0;
grpc_fork_handlers_auto_register();
}
static bool append_filter(grpc_channel_stack_builder* builder, void* arg) {
return grpc_channel_stack_builder_append_filter(
builder, (const grpc_channel_filter*)arg, nullptr, nullptr);
}
static bool prepend_filter(grpc_channel_stack_builder* builder, void* arg) {
return grpc_channel_stack_builder_prepend_filter(
builder, (const grpc_channel_filter*)arg, nullptr, nullptr);
}
static void register_builtin_channel_init() {
grpc_channel_init_register_stage(GRPC_CLIENT_SUBCHANNEL,
GRPC_CHANNEL_INIT_BUILTIN_PRIORITY,
grpc_add_connected_filter, nullptr);
grpc_channel_init_register_stage(GRPC_CLIENT_DIRECT_CHANNEL,
GRPC_CHANNEL_INIT_BUILTIN_PRIORITY,
grpc_add_connected_filter, nullptr);
grpc_channel_init_register_stage(GRPC_SERVER_CHANNEL,
GRPC_CHANNEL_INIT_BUILTIN_PRIORITY,
grpc_add_connected_filter, nullptr);
grpc_channel_init_register_stage(GRPC_CLIENT_LAME_CHANNEL,
GRPC_CHANNEL_INIT_BUILTIN_PRIORITY,
append_filter, (void*)&grpc_lame_filter);
grpc_channel_init_register_stage(GRPC_SERVER_CHANNEL, INT_MAX, prepend_filter,
(void*)&grpc_server_top_filter);
}
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();
gpr_thd_init();
grpc_stats_init();
grpc_slice_intern_init();
grpc_mdctx_global_init();
grpc_channel_init_init();
grpc_security_pre_init();
grpc_core::ExecCtx::GlobalInit();
grpc_iomgr_init();
gpr_timers_global_init();
grpc_handshaker_factory_registry_init();
grpc_security_init();
for (i = 0; i < g_number_of_plugins; i++) {
if (g_all_of_the_plugins[i].init != nullptr) {
g_all_of_the_plugins[i].init();
}
}
/* register channel finalization AFTER all plugins, to ensure that it's run
* at the appropriate time */
grpc_register_security_filters();
register_builtin_channel_init();
grpc_tracer_init("GRPC_TRACE");
/* no more changes to channel init pipelines */
grpc_channel_init_finalize();
grpc_iomgr_start();
}
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_core::ExecCtx exec_ctx(0);
{
grpc_timer_manager_set_threading(
false); // shutdown timer_manager thread
grpc_executor_shutdown();
for (i = g_number_of_plugins; i >= 0; i--) {
if (g_all_of_the_plugins[i].destroy != nullptr) {
g_all_of_the_plugins[i].destroy();
}
}
}
grpc_iomgr_shutdown();
gpr_timers_global_destroy();
grpc_tracer_shutdown();
grpc_mdctx_global_shutdown();
grpc_handshaker_factory_registry_shutdown();
grpc_slice_intern_shutdown();
grpc_stats_shutdown();
}
grpc_core::ExecCtx::GlobalShutdown();
}
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;
}
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