[英]Mutex is not supported when compiling with /clr or clr:pure (cpprestsdk aka casablanca)
我在visual c++
使用64 bit
配置創建了一個CLR project
,並嘗試使用cpprestsdk aka casablanca 64bit
。
但是當我運行項目時,發生了錯誤:
1>------ Build started: Project: Timestamp, Configuration: Debug x64 ------
1>MyForm.cpp
1>c:\program files (x86)\microsoft visual studio\2017\community\vc\tools\msvc\14.13.26128\include\mutex(8): fatal error C1189: #error: <mutex> is not supported when compiling with /clr or /clr:pure.
1>Testapi.cpp
1>c:\program files (x86)\microsoft visual studio\2017\community\vc\tools\msvc\14.13.26128\include\mutex(8): fatal error C1189: #error: <mutex> is not supported when compiling with /clr or /clr:pure.
1>Generating Code...
1>Done building project "Timestamp.vcxproj" -- FAILED.
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
其他錯誤:
E2093 a local lambda is not allowed in a member function of a managed class Timestamp c:\Users\Laptop-attendance\source\repos\Timestamp\Timestamp\Testapi.h 97
IDE在.then
函數(如.then([=](http_response response)
顯示有關'['
字符的錯誤,如果您指出該錯誤,則說"a local lambda is not allowed in a member function of a managed class"
如果我在具有64位配置的Visual c ++的Windows Console Application
中嘗試cpprestsdk
,則可以正常工作。
我正在使用Visual Studio 2017。
您認為cpprestsdk不能在vc ++的CLR項目中使用嗎?
謝謝。
這是我的代碼,以及有關cpprestsdk的代碼,我只是從其教程中獲得的:
#ifndef TESTAPI_H
#define TESTAPI_H
#pragma once
#include <cpprest/http_client.h>
#include <cpprest/filestream.h>
#include <cpprest/json.h>
namespace Timestamp {
using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;
using namespace utility; // Common utilities like string conversions
using namespace web; // Common features like URIs.
using namespace web::http; // Common HTTP functionality
using namespace web::http::client; // HTTP client features
using namespace concurrency::streams; // Asynchronous streams
/// <summary>
/// Summary for Testapi
/// </summary>
public ref class Testapi : public System::Windows::Forms::Form
{
public:
Testapi(void)
{
InitializeComponent();
//
//TODO: Add the constructor code here
//
}
protected:
/// <summary>
/// Clean up any resources being used.
/// </summary>
~Testapi()
{
if (components)
{
delete components;
}
}
private:
/// <summary>
/// Required designer variable.
/// </summary>
System::ComponentModel::Container ^components;
#pragma region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
void InitializeComponent(void)
{
this->SuspendLayout();
//
// Testapi
//
this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
this->ClientSize = System::Drawing::Size(284, 261);
this->Name = L"Testapi";
this->Text = L"Testapi";
this->Load += gcnew System::EventHandler(this, &Testapi::Testapi_Load);
this->ResumeLayout(false);
}
#pragma endregion
private: System::Void Testapi_Load(System::Object^ sender, System::EventArgs^ e) {
auto fileStream = std::make_shared<ostream>();
// Open stream to output file.
pplx::task<void> requestTask = fstream::open_ostream(U("results.html")).then([=](ostream outFile)
{
*fileStream = outFile;
// Create http_client to send the request.
http_client client(U("http://13.231.231.252:3000/api/individual_employment_setting/detail/172"));
// Build request URI and start the request.
//uri_builder builder(U("/search"));
//builder.append_query(U("q"), U("cpprestsdk github"));
return client.request(methods::GET);
})
// Handle response headers arriving.
.then([=](http_response response)
{
printf("Received response status code:%u\n", response.status_code());
// Write response body into the file.
// return response.body().read_to_end(fileStream->streambuf());
stringstreambuf buffer;
response.body().read_to_end(buffer).get();
//show content in console
printf("Response body: \n %s", buffer.collection().c_str());
//parse content into a JSON object:
//json::value jsonvalue = json::value::parse(buffer.collection());
return fileStream->print(buffer.collection()); //write to file anyway
})
// Close the file stream.
.then([=](size_t)
{
return fileStream->close();
});
// Wait for all the outstanding I/O to complete and handle any exceptions
try
{
requestTask.wait();
}
catch (const std::exception &e)
{
printf("Error exception:%s\n", e.what());
}
}
};
}
#endif /*TESTAPI_H*/
在回答的最后 ,漢斯·帕桑特(Hans Passant)給出了一個提示,對您的情況很有用。 基本上,您需要一個單獨的c ++庫(關閉了cpprest
支持),在其中包裝cpprest
代碼,從CLR項目鏈接此庫,並確保沒有包含的標頭會引入<mutex>
。
只是一個例子,在restwrapper.h頭文件中有一個這樣的類:
class RestWrapper
{
public:
void test();
};
在其實現文件restwrapper.cpp中 :
#include "restwrapper.h"
#include <cpprest/http_client.h>
#include <cpprest/filestream.h>
#include <cpprest/json.h>
using namespace utility; // Common utilities like string conversions
using namespace web; // Common features like URIs.
using namespace web::http; // Common HTTP functionality
using namespace web::http::client; // HTTP client features
using namespace concurrency::streams; // Asynchronous streams
void RestWrapper::test()
{
auto fileStream = std::make_shared<ostream>();
// Open stream to output file.
pplx::task<void> requestTask = fstream::open_ostream(U("results.html")).then([=](ostream outFile)
{
*fileStream = outFile;
// Create http_client to send the request.
http_client client(U("http://13.231.231.252:3000/api/individual_employment_setting/detail/172"));
//etc ...
}
您可以在DLL中編譯此類(鏈接cpprest
及其所有相關的庫),然后使CLR項目鏈接該庫。 在CLR項目中,您僅需要包含restwrapper.h ,而后者不包含任何內容:
#include <restwrapper.h>
System::Void Testapi_Load(System::Object^ sender, System::EventArgs^ e)
{
RestWrapper wrapper;
wrapper.test();
}
您可以從CLR項目中調用使用互斥鎖的類,您需要做的是創建一個普通的c ++項目並創建具有所需功能但不在其標頭中公開<mutex>
的類,然后您可以自由調用這些類來自您的CLR項目。
只需右鍵單擊您的.cpp文件,然后在“常規->公共語言運行時支持”下選擇“無公共語言運行時支持”。
真正最簡單的解決方案。
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.