C++ 客户端上的Grpc访问冲突
我正在玩弄C++ 客户端上的Grpc访问冲突,c++,c++17,visual-studio-2019,grpc,access-violation,C++,C++17,Visual Studio 2019,Grpc,Access Violation,我正在玩弄GRPC。目前，我使用C#web应用程序作为我的GRPC服务器，使用C++控制台应用程序作为客户端 我能够成功地连接并与服务器通信，没有任何问题。问题出现在 我退出C++控制台客户端应用程序。退出时，将抛出访问冲突 堆栈跟踪 MeterReaderClientCpp.exe!`anonymous namespace'::ThreadInternalsWindows::thread_body MeterReaderClientCpp.exe!__acrt_lock ntdll.dll
GRPCC#GRPCC++C++MeterReaderClientCpp.exe!`anonymous namespace'::ThreadInternalsWindows::thread_body
MeterReaderClientCpp.exe!__acrt_lock
ntdll.dll!RtlpWaitOnCriticalSection()
ntdll.dll!RtlpEnterCriticalSectionContended()
ntdll.dll!RtlEnterCriticalSection()
MeterReaderClientCpp.exe!__acrt_lock(__acrt_lock_id _Lock) Line 55
MeterReaderClientCpp.exe!_free_dbg(void * block, int block_use) Line 1019
MeterReaderClientCpp.exe!free(void * block) Line 32
MeterReaderClientCpp.exe!gpr_free(void * p) Line 53
MeterReaderClientCpp.exe!`anonymous namespace'::ThreadInternalsWindows::destroy_thread() Line 142
MeterReaderClientCpp.exe!`anonymous namespace'::ThreadInternalsWindows::Join() Line 112
MeterReaderClientCpp.exe!grpc_core::Thread::Join() Line 147
MeterReaderClientCpp.exe!gc_completed_threads() Line 74
MeterReaderClientCpp.exe!stop_threads() Line 331
MeterReaderClientCpp.exe!grpc_timer_manager_set_threading(bool threaded) Line 351
MeterReaderClientCpp.exe!grpc_shutdown_internal_locked() Line 175
MeterReaderClientCpp.exe!grpc_shutdown_internal(void * __formal) Line 208
MeterReaderClientCpp.exe!`anonymous namespace'::ThreadInternalsWindows::thread_body(void * v) Line 128
int main( )
{
using namespace MeterReaderWeb::Services;
using namespace google::protobuf::util;
using namespace google::protobuf;
std::cout << "Press enter\n";
std::cin.ignore( );
std::cout << "Calling Grpc service\n";
std::fstream file{ R"(C:\Certificates\certificate.cer)", std::ios::in | std::ios::beg };
if ( !file.is_open( ) )
{
std::cerr << "Failed to open file\n";
return 1;
}
std::stringstream buffer;
buffer << file.rdbuf( );
grpc::SslCredentialsOptions options;
options.pem_root_certs = buffer.str( );
auto credentials{ grpc::SslCredentials( options ) };
auto channel{ grpc::CreateChannel( "localhost:5001", credentials ) };
auto stub{ MeterReadingService::NewStub( channel ) };
ReadingPacket packet;
packet.set_status( ReadingStatus::METER_READER_SUCCESS );
packet.set_notes( "Here are some random notes" );
auto message{ packet.add_readings( ) };
message->set_customer_id( 1 );
message->set_reading_value( 10001 );
auto timestamp{ message->mutable_reading_time( ) };
timestamp->CopyFrom( TimeUtil::GetCurrentTime( ) );
grpc::ClientContext context;
StatusMessage response;
if ( auto status{ stub->AddReading( &context, packet, &response ) }; status.ok( ) )
{
std::cout << "Added reading successfully\n";
auto responseStatus{ response.status( ) };
if ( responseStatus == ReadingStatus::METER_READER_SUCCESS )
{
std::cout << "Server status: success\n"
<< "Message: " << response.message( ) << '\n';
}
}
else
{
std::cerr << "Error: " << status.error_message( ) << '\n';
std::cerr << "Error Details: " << status.error_details( ) << '\n';
}
std::cin.ignore( );
}
int main( )
{
std::cout << "Press enter\n";
std::cin.ignore( );
std::cout << "Calling Grpc service\n";
grpc_init( );
{ // <- Intentionally added scope here.
grpc::SslCredentialsOptions options;
if ( auto certificate{ ReadCertificate( ) } )
options.pem_root_certs = std::move( certificate ).value( );
else return 1;
auto credentials{ grpc::SslCredentials( options ) };
auto channel{ grpc::CreateChannel( "localhost:5001", credentials ) };
auto stub{ MeterReadingService::NewStub( channel ) };
std::cout << "Sending single packet\n";
SendPacket( stub.get( ), 8000 );
std::cout << "Sending multiple packets\n";
StreamDiagnostics( stub.get( ), 3 );
}
std::cout << "Shutting down library\n";
grpc_shutdown_blocking( );
std::cout << "Shut down complete press enter to exit\n";
std::cin.ignore( );
}
int main（）
{
使用命名空间MeterReaderWeb:：Services；
使用名称空间google:：protobuf:：util；
使用名称空间google：：protobuf；
std:：coutcopyFrom（TimeUtil:：GetCurrentTime（））；
grpc:：ClientContext；
状态消息响应；
if（自动状态{stub->AddReading（&context，packet，&response）}；status.ok（））
{
std：：cout好的，我相信我已经找到了导致问题的原因
在我最初的帖子中，我说：
我已经尝试向grpc\u init（）
和grpc\u shutdown（）
添加调用，尽管
客户端示例不包含这两个调用
加上这些都没有效果。”
这是真的，但在重新阅读grpc\u shutdown（）
的文档后，我注意到了这一点（我的重点）：
最后一次调用grpc_shutdown
将启动grpc清理
库内部，这可能发生在另一个线程中
已完成清理，grpc未使用内存，也未使用任何指令
在grpc库中执行。调用之前，所有应用程序
拥有的grpc对象必须已销毁。
这就是我认为我出错的地方。我调用了grpc\u shutdown（）
，而我的作用域中仍然有grpc对象。为了更正，我对grpc对象的作用域进行了限定，然后在退出该作用域后调用了grpc\u shutdown（）
。这似乎纠正了问题
新Grpc客户端
int main( )
{
using namespace MeterReaderWeb::Services;
using namespace google::protobuf::util;
using namespace google::protobuf;
std::cout << "Press enter\n";
std::cin.ignore( );
std::cout << "Calling Grpc service\n";
std::fstream file{ R"(C:\Certificates\certificate.cer)", std::ios::in | std::ios::beg };
if ( !file.is_open( ) )
{
std::cerr << "Failed to open file\n";
return 1;
}
std::stringstream buffer;
buffer << file.rdbuf( );
grpc::SslCredentialsOptions options;
options.pem_root_certs = buffer.str( );
auto credentials{ grpc::SslCredentials( options ) };
auto channel{ grpc::CreateChannel( "localhost:5001", credentials ) };
auto stub{ MeterReadingService::NewStub( channel ) };
ReadingPacket packet;
packet.set_status( ReadingStatus::METER_READER_SUCCESS );
packet.set_notes( "Here are some random notes" );
auto message{ packet.add_readings( ) };
message->set_customer_id( 1 );
message->set_reading_value( 10001 );
auto timestamp{ message->mutable_reading_time( ) };
timestamp->CopyFrom( TimeUtil::GetCurrentTime( ) );
grpc::ClientContext context;
StatusMessage response;
if ( auto status{ stub->AddReading( &context, packet, &response ) }; status.ok( ) )
{
std::cout << "Added reading successfully\n";
auto responseStatus{ response.status( ) };
if ( responseStatus == ReadingStatus::METER_READER_SUCCESS )
{
std::cout << "Server status: success\n"
<< "Message: " << response.message( ) << '\n';
}
}
else
{
std::cerr << "Error: " << status.error_message( ) << '\n';
std::cerr << "Error Details: " << status.error_details( ) << '\n';
}
std::cin.ignore( );
}
int main( )
{
std::cout << "Press enter\n";
std::cin.ignore( );
std::cout << "Calling Grpc service\n";
grpc_init( );
{ // <- Intentionally added scope here.
grpc::SslCredentialsOptions options;
if ( auto certificate{ ReadCertificate( ) } )
options.pem_root_certs = std::move( certificate ).value( );
else return 1;
auto credentials{ grpc::SslCredentials( options ) };
auto channel{ grpc::CreateChannel( "localhost:5001", credentials ) };
auto stub{ MeterReadingService::NewStub( channel ) };
std::cout << "Sending single packet\n";
SendPacket( stub.get( ), 8000 );
std::cout << "Sending multiple packets\n";
StreamDiagnostics( stub.get( ), 3 );
}
std::cout << "Shutting down library\n";
grpc_shutdown_blocking( );
std::cout << "Shut down complete press enter to exit\n";
std::cin.ignore( );
}
int main（）
{
标准：：cout