我没有足够的声誉积分来评论,以询问他们是否解决了最初提出的问题here。我有一个同样的问题,即在构建ofstream时程序崩溃。 它不是多线程访问,但是可以快速连续调用。我相信它是第二次崩溃。我使用范围来确保流对象被销毁。 为什么会这样?
我也尝试过std :: fopen。这还会导致崩溃。
以下是使用ofstream的代码:
static bool writeConfigFile (const char * filename, const Config & cfg)
{
logsPrintLine(_SLOG_SETCODE(_SLOGC_CONFIG, 0), _SLOG_INFO, "Write config file (%s stream)", filename);
ofstream os(filename); // FIXME: Crashes here creating ofstream 2nd time
if (os.good())
{
// Uses stream insertion operator to output attributes to stream
// in human readable form (about 2kb)
outputConfig(cfg, os);
if (!os.good())
{
logsPrintLine(_SLOG_SETCODE(_SLOGC_CONFIG, 0), _SLOG_NOTICE, "Failed to write configuration file (%s)", filename);
return false;
}
logsPrintLine(_SLOG_SETCODE(_SLOGC_CONFIG, 0), _SLOG_INFO, "Configuration written to file (%s)", filename);
return true;
}
logsPrintLine(_SLOG_SETCODE(_SLOGC_CONFIG, 0), _SLOG_NOTICE, "Cannot write configuration file (%s)", filename);
return false;
}
/**
* Called when configuration settings have been read/received and validated
* @return true if successfully set, and written to file
*/
bool Config::set (SysConfigSource source, const struct SCADA_dsconfig * p)
{
Lock lock(mtxSet); // This is locking a mutex on construction of the lock. Release it on destruction.
// Setup the non-current one to switch to
Config * pCfg = pConfig.other();
unsigned i, f, n = 0;
// set attributes in pCfg based on the config received
// and some constants ...
pCfg->setWritten(writeConfigFile("test.conf", *pCfg));
if (!pCfg->isWritten())
{
// Don't set system config status here. Existing one still in use.
logsPrintLine(_SLOG_SETCODE(_SLOGC_CONFIG, 0), _SLOG_NOTICE, "Config file not written. Retain prior config.");
return false;
}
pConfig.swap(); // switch-in the new config
setSystemConfigSource(source);
toSyslog(pCfg);
notifyConfigChange();
return true;
}
答案 0 :(得分:0)
也许会发布一段源代码,以了解错误的出处。
这是我如何使用fstream
的非常基本的代码段。.希望对您有所帮助。
#include <iostream>
#include <fstream>
#include <string>
int main() {
while (1) {
std::string testString;
std::ofstream outFile;
outFile.open("Test", std::ios_base::app); // Appends to file, does not delete existing code
std::cout << "Enter a string: ";
std::cin >> testString;
outFile << testString << std::endl;
outFile.close();
}
}
答案 1 :(得分:0)
原来是设备驱动程序总线主机问题。启动devb-ahci时添加“ ahci nobmstr”。
派生