本文整理汇总了C++中DurableMappedFile::create方法的典型用法代码示例。如果您正苦于以下问题：C++ DurableMappedFile::create方法的具体用法？C++ DurableMappedFile::create怎么用？C++ DurableMappedFile::create使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类DurableMappedFile的用法示例。
在下文中一共展示了DurableMappedFile::create方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: run
void run() {
try { boost::filesystem::remove(fn); }
catch(...) { }
MMAPV1LockerImpl lockState;
Lock::GlobalWrite lk(&lockState);
{
DurableMappedFile f;
unsigned long long len = 256 * 1024 * 1024;
verify( f.create(fn, len, /*sequential*/false) );
{
char *p = (char *) f.getView();
verify(p);
// write something to the private view as a test
if (storageGlobalParams.dur)
privateViews.makeWritable(p, 6);
strcpy(p, "hello");
}
if (storageGlobalParams.dur) {
char *w = (char *) f.view_write();
strcpy(w + 6, "world");
}
MongoFileFinder ff;
ASSERT( ff.findByPath(fn) );
ASSERT( ff.findByPath("asdf") == 0 );
}
{
MongoFileFinder ff;
ASSERT( ff.findByPath(fn) == 0 );
}
int N = 10000;
#if !defined(_WIN32) && !defined(__linux__)
// seems this test is slow on OS X.
N = 100;
#endif
// we make a lot here -- if we were leaking, presumably it would fail doing this many.
Timer t;
for( int i = 0; i < N; i++ ) {
DurableMappedFile f;
verify( f.open(fn, i%4==1) );
{
char *p = (char *) f.getView();
verify(p);
if (storageGlobalParams.dur)
privateViews.makeWritable(p, 4);
strcpy(p, "zzz");
}
if (storageGlobalParams.dur) {
char *w = (char *) f.view_write();
if( i % 2 == 0 )
++(*w);
verify( w[6] == 'w' );
}
}
if( t.millis() > 10000 ) {
mongo::unittest::log() << "warning: MMap LeakTest is unusually slow N:" << N <<
' ' << t.millis() << "ms" << endl;
}
}