本文整理汇总了C++中MongoDataFile::openExisting方法的典型用法代码示例。如果您正苦于以下问题：C++ MongoDataFile::openExisting方法的具体用法？C++ MongoDataFile::openExisting怎么用？C++ MongoDataFile::openExisting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MongoDataFile的用法示例。
在下文中一共展示了MongoDataFile::openExisting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: openExistingFile
bool Database::openExistingFile( int n ) {
assert(this);
Lock::assertWriteLocked(name);
{
// must not yet be visible to others as we aren't in the db's write lock and
// we will write to _files vector - thus this assert.
bool loaded = dbHolder().__isLoaded(name, path);
assert( !loaded );
}
// additionally must be in the dbholder mutex (no assert for that yet)
// todo: why here? that could be bad as we may be read locked only here
namespaceIndex.init();
if ( n < 0 || n >= DiskLoc::MaxFiles ) {
massert( 15924 , str::stream() << "getFile(): bad file number value " << n << " (corrupt db?): run repair", false);
}
{
if( n < (int) _files.size() && _files[n] ) {
dlog(2) << "openExistingFile " << n << " is already open" << endl;
return true;
}
}
{
boost::filesystem::path fullName = fileName( n );
string fullNameString = fullName.string();
MongoDataFile *df = new MongoDataFile(n);
try {
if( !df->openExisting( fullNameString.c_str() ) ) {
delete df;
return false;
}
}
catch ( AssertionException& ) {
delete df;
throw;
}
while ( n >= (int) _files.size() ) {
_files.push_back(0);
}
_files[n] = df;
}
return true;
}