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// engine.cpp
#include "stdafx.h"
#include "engine.h"
#include "../util/file.h"
namespace mongo {
Scope::Scope(){
}
Scope::~Scope(){
}
ScriptEngine::ScriptEngine(){
}
ScriptEngine::~ScriptEngine(){
}
int Scope::invoke( const char* code , const BSONObj& args, int timeoutMs ){
ScriptingFunction func = createFunction( code );
uassert( "compile failed" , func );
return invoke( func , args, timeoutMs );
}
bool Scope::execFile( const string& filename , bool printResult , bool reportError , bool assertOnError, int timeoutMs ){
path p( filename );
if ( is_directory( p ) ){
cerr << "can't read directory [" << filename << "]" << endl;
if ( assertOnError )
assert( 0 );
return false;
}
if ( ! exists( p ) ){
cerr << "file [" << filename << "] doesn't exist" << endl;
if ( assertOnError )
assert( 0 );
return false;
}
File f;
f.open( filename.c_str() );
fileofs L = f.len();
assert( L <= 0x7ffffffe );
char * data = (char*)malloc( (size_t) L+1 );
data[L] = 0;
f.read( 0 , data , (size_t) L );
return exec( data , filename , printResult , reportError , assertOnError, timeoutMs );
}
typedef map< string , list<Scope*> > PoolToScopes;
class ScopeCache {
public:
ScopeCache(){
_magic = 17;
}
~ScopeCache(){
assert( _magic == 17 );
_magic = 1;
if ( inShutdown() )
return;
clear();
}
void done( const string& pool , Scope * s ){
boostlock lk( _mutex );
list<Scope*> & l = _pools[pool];
if ( l.size() > 10 ){
delete s;
}
else {
l.push_back( s );
s->reset();
}
}
Scope * get( const string& pool ){
boostlock lk( _mutex );
list<Scope*> & l = _pools[pool];
if ( l.size() == 0 )
return 0;
Scope * s = l.back();
l.pop_back();
s->reset();
return s;
}
void clear(){
set<Scope*> seen;
for ( PoolToScopes::iterator i=_pools.begin() ; i != _pools.end(); i++ ){
for ( list<Scope*>::iterator j=i->second.begin(); j != i->second.end(); j++ ){
Scope * s = *j;
assert( ! seen.count( s ) );
delete s;
seen.insert( s );
}
}
_pools.clear();
}
private:
PoolToScopes _pools;
mutex _mutex;
int _magic;
};
thread_specific_ptr<ScopeCache> scopeCache;
class PooledScope : public Scope {
public:
PooledScope( const string pool , Scope * real ) : _pool( pool ) , _real( real ){};
virtual ~PooledScope(){
ScopeCache * sc = scopeCache.get();
assert( sc );
sc->done( _pool , _real );
_real = 0;
}
void reset(){
_real->reset();
}
void init( BSONObj * data ){
_real->init( data );
}
void localConnect( const char * dbName ){
_real->localConnect( dbName );
}
void externalSetup(){
_real->externalSetup();
}
double getNumber( const char *field ){
return _real->getNumber( field );
}
string getString( const char *field ){
return _real->getString( field );
}
bool getBoolean( const char *field ){
return _real->getBoolean( field );
}
BSONObj getObject( const char *field ){
return _real->getObject( field );
}
int type( const char *field ){
return _real->type( field );
}
void setNumber( const char *field , double val ){
_real->setNumber( field , val );
}
void setString( const char *field , const char * val ){
_real->setString( field , val );
}
void setObject( const char *field , const BSONObj& obj , bool readOnly=true ){
_real->setObject( field , obj , readOnly );
}
void setBoolean( const char *field , bool val ){
_real->setBoolean( field , val );
}
void setThis( const BSONObj * obj ){
_real->setThis( obj );
}
ScriptingFunction createFunction( const char * code ){
return _real->createFunction( code );
}
/**
* @return 0 on success
*/
int invoke( ScriptingFunction func , const BSONObj& args, int timeoutMs , bool ignoreReturn ){
return _real->invoke( func , args , timeoutMs , ignoreReturn );
}
string getError(){
return _real->getError();
}
bool exec( const string& code , const string& name , bool printResult , bool reportError , bool assertOnError, int timeoutMs = 0 ){
return _real->exec( code , name , printResult , reportError , assertOnError , timeoutMs );
}
bool execFile( const string& filename , bool printResult , bool reportError , bool assertOnError, int timeoutMs = 0 ){
return _real->execFile( filename , printResult , reportError , assertOnError , timeoutMs );
}
void injectNative( const char *field, NativeFunction func ){
_real->injectNative( field , func );
}
void gc(){
_real->gc();
}
private:
string _pool;
Scope * _real;
};
auto_ptr<Scope> ScriptEngine::getPooledScope( const string& pool ){
if ( ! scopeCache.get() ){
scopeCache.reset( new ScopeCache() );
}
Scope * s = scopeCache->get( pool );
if ( ! s ){
s = createScope();
}
auto_ptr<Scope> p;
p.reset( new PooledScope( pool , s ) );
return p;
}
void ScriptEngine::threadDone(){
ScopeCache * sc = scopeCache.get();
if ( sc ){
sc->clear();
}
}
ScriptEngine * globalScriptEngine;
}
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