[英]std::ofstream behaves differently in DLL
我正在開發一個插件。 看看下面的代碼。
string request(char post_params[]) {
CURL *curl;
CURLcode res;
std::string buffer; //here we'll write response
curl = curl_easy_init();
if (curl) {
curl_easy_setopt(curl, CURLOPT_URL, url);
curl_easy_setopt(curl, CURLOPT_POSTFIELDS, post_params);
curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, (long) strlen(post_params));
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, writer);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &buffer);
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
return buffer;
}
....
bool perform(..) {
std::ofstream file ("d:/t/t.txt");
file << "opened";
file.close();
string resp = request(....);
...
}
如果代碼在應用程序內啟動,則會創建文件d:/t/t.txt
,但如果代碼編譯為DLL,並從運行我的插件的應用程序啟動,則不會創建該文件。 但是如果我注釋掉string resp = request(....);
接下來, 將創建該文件。 有人可以解釋一下這里有什么?
如果使用Visual Studio,請確保將msvcprtd.lib(Debug)和msvcprt.lib(Release)添加到依賴項中。
std::ofstream file ("d:/t/t.txt");
// Make sure the file is opened before trying to write in it
if (!file.is_open())
{
// print error message
}
else
{
file << "opened";
file.close();
}
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