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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/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/trace.h"
#include "src/core/lib/http/parser.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/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();
gpr_mu_init(&g_init_mu);
grpc_register_built_in_plugins();
g_initializations = 0;
}
static bool append_filter(grpc_exec_ctx *exec_ctx,
grpc_channel_stack_builder *builder, void *arg) {
return grpc_channel_stack_builder_append_filter(
builder, (const grpc_channel_filter *)arg, NULL, NULL);
}
static bool prepend_filter(grpc_exec_ctx *exec_ctx,
grpc_channel_stack_builder *builder, void *arg) {
return grpc_channel_stack_builder_prepend_filter(
builder, (const grpc_channel_filter *)arg, NULL, NULL);
}
static void register_builtin_channel_init() {
grpc_channel_init_register_stage(GRPC_CLIENT_SUBCHANNEL,
GRPC_CHANNEL_INIT_BUILTIN_PRIORITY,
grpc_add_connected_filter, NULL);
grpc_channel_init_register_stage(GRPC_CLIENT_DIRECT_CHANNEL,
GRPC_CHANNEL_INIT_BUILTIN_PRIORITY,
grpc_add_connected_filter, NULL);
grpc_channel_init_register_stage(GRPC_SERVER_CHANNEL,
GRPC_CHANNEL_INIT_BUILTIN_PRIORITY,
grpc_add_connected_filter, NULL);
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);
grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
gpr_mu_lock(&g_init_mu);
if (++g_initializations == 1) {
gpr_time_init();
grpc_slice_intern_init();
grpc_mdctx_global_init();
grpc_channel_init_init();
grpc_register_tracer(&grpc_api_trace);
grpc_register_tracer(&grpc_trace_channel);
grpc_register_tracer(&grpc_connectivity_state_trace);
grpc_register_tracer(&grpc_trace_channel_stack_builder);
grpc_register_tracer(&grpc_http1_trace);
grpc_register_tracer(&grpc_cq_pluck_trace); // default on
grpc_register_tracer(&grpc_combiner_trace);
grpc_register_tracer(&grpc_server_channel_trace);
grpc_register_tracer(&grpc_bdp_estimator_trace);
grpc_register_tracer(&grpc_cq_event_timeout_trace); // default on
grpc_register_tracer(&grpc_trace_operation_failures);
grpc_register_tracer(&grpc_resource_quota_trace);
grpc_register_tracer(&grpc_call_error_trace);
#ifndef NDEBUG
grpc_register_tracer(&grpc_trace_pending_tags);
grpc_register_tracer(&grpc_trace_cq_refcount);
grpc_register_tracer(&grpc_trace_closure);
grpc_register_tracer(&grpc_trace_error_refcount);
grpc_register_tracer(&grpc_trace_stream_refcount);
grpc_register_tracer(&grpc_trace_fd_refcount);
grpc_register_tracer(&grpc_trace_metadata);
#endif
grpc_security_pre_init();
grpc_iomgr_init(&exec_ctx);
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 != NULL) {
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(&exec_ctx);
}
gpr_mu_unlock(&g_init_mu);
grpc_exec_ctx_finish(&exec_ctx);
GRPC_API_TRACE("grpc_init(void)", 0, ());
}
void grpc_shutdown(void) {
int i;
GRPC_API_TRACE("grpc_shutdown(void)", 0, ());
grpc_exec_ctx exec_ctx =
GRPC_EXEC_CTX_INITIALIZER(0, grpc_never_ready_to_finish, NULL);
gpr_mu_lock(&g_init_mu);
if (--g_initializations == 0) {
grpc_iomgr_shutdown(&exec_ctx);
gpr_timers_global_destroy();
grpc_tracer_shutdown();
for (i = g_number_of_plugins; i >= 0; i--) {
if (g_all_of_the_plugins[i].destroy != NULL) {
g_all_of_the_plugins[i].destroy();
}
}
grpc_mdctx_global_shutdown(&exec_ctx);
grpc_handshaker_factory_registry_shutdown(&exec_ctx);
grpc_slice_intern_shutdown();
}
gpr_mu_unlock(&g_init_mu);
grpc_exec_ctx_finish(&exec_ctx);
}
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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