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/**
* Copyright (C) 2008 10gen Inc.info
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "pch.h"
#include "mmap.h"
namespace mongo {
//extern bool checkNsFilesOnLoad;
static set<RamStoreFile*> files;
void RamStoreFile::grow(int offset, int len) {
cout << "GROW ofs:" << offset << " len:" << len;
assert( len > 0 );
Node& n = _m[offset];
cout << " oldlen:" << n.len << endl;
assert( n.len > 0 );
if( len > n.len ) {
n.p = (char *) realloc(n.p, len);
memset(((char *)n.p) + n.len, 0, len - n.len);
n.len = len;
}
}
/* maxLen can be -1 for existing data */
void* RamStoreFile::at(int offset, int maxLen) {
if( offset != _last ) {
if( _m.count(_last) ) {
_m[_last].check();
if( !(offset < _last || offset >= _last + _m[_last].len) ) {
cout << offset << ' ' << _last << ' ' << _m[_last].len << endl;
assert(false);
}
}
}
_last = offset;
Node& n = _m[offset];
if( n.len == 0 ) {
// create
if( strstr(name, ".ns") == 0 )
cout << "CREATE " << name << " ofs:" << offset << " len:" << maxLen << endl;
assert( maxLen >= 0 );
n.p = (char *) calloc(maxLen+1, 1);
n.len = maxLen;
}
assert( n.len >= maxLen );
n.check();
return n.p;
}
void RamStoreFile::Node::check() {
assert( p[len] == 0 );
}
void RamStoreFile::check() {
for( std::map<int,Node>::iterator i = _m.begin(); i != _m.end(); i++ ) {
i->second.check();
}
}
void RamStoreFile::validate() {
for( set<RamStoreFile*>::iterator i = files.begin(); i != files.end(); i++ ) {
(*i)->check();
}
}
RamStoreFile::~RamStoreFile() {
check();
files.erase(this);
}
RamStoreFile::RamStoreFile() : _len(0) {
// checkNsFilesOnLoad = false;
files.insert(this);
}
}
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