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// class modl implementation.
#ifndef MODL_CPP
#define MODL_CPP
#include <limits.h>
#include <stdlib.h>
#include <dlfcn.h>
#include <stdio.h>
#include "s_conf.h"
#include "s_mutx.h"
#include "s_ncur.h"
#include "modl.h"
#include "dir.h"
using namespace std;
modl::modl( )
{
map_mods = new hmap<dynmod*,string>(80);
pthread_mutex_init( &mut_map_mods, NULL );
if ( s_conf::get().get_val( "PRE_MODS_COMMANDS" ).compare( "ON" ) == 0 )
preload_modules( new string("mods/commands/") );
if ( s_conf::get().get_val( "PRE_MODS_HTML" ).compare( "ON" ) == 0 )
preload_modules( new string("mods/html/") );
}
modl::~modl()
{
pthread_mutex_lock ( &mut_map_mods );
// dlclose all the_module's first!
map_mods->run_func ( &modl::dlclose_ );
// then clean the hash map.
map_mods->make_empty ( );
pthread_mutex_unlock ( &mut_map_mods );
pthread_mutex_destroy( &mut_map_mods );
}
void
modl::preload_modules( string *p_path )
{
dir* p_dir = new dir();
p_dir->open_dir( *p_path );
p_dir->read_dir();
vector<string>* p_dir_vec = p_dir->get_dir_vec();
if ( ! p_dir_vec->empty() )
{
vector<string>::iterator iter = p_dir_vec->begin();
do
{
if ( iter->length() >= 3 && iter->compare( iter->length()-3, 3, ".so" ) == 0 )
cache_module( *p_path + *iter );
}
while ( ++iter != p_dir_vec->end() );
}
p_dir->close_dir();
p_dir->~dir();
}
void
modl::dlclose_( dynmod* mod )
{
dlclose( mod->the_module );
}
dynmod*
modl::cache_module( string s_name )
{
void *the_module = NULL;
function *the_func = NULL;
the_module = dlopen( s_name.c_str(), RTLD_NOW );
if ( the_module == NULL )
{
pthread_mutex_lock ( &s_mutx::get
().mut_stdout );
#ifdef NCURSES
s_ncur::get
().print( dlerror() );
#else
cerr << "dlerror: " << dlerror() << endl;
#endif
pthread_mutex_unlock( &s_mutx::get
().mut_stdout );
return NULL;
}
the_func = (function*) dlsym( the_module, "extern_function" );
if ( the_func == NULL )
{
pthread_mutex_lock ( &s_mutx::get
().mut_stdout );
#ifdef NCURSES
s_ncur::get
().print( dlerror() );
#else
cerr << "dlerror: " << dlerror() << endl;
#endif
pthread_mutex_unlock( &s_mutx::get
().mut_stdout );
return NULL;
}
#ifdef VERBOSE
pthread_mutex_lock ( &s_mutx::get
().mut_stdout );
cout << MODULEC << s_name << endl;
pthread_mutex_unlock( &s_mutx::get
().mut_stdout );
#endif
#ifdef NCURSES
{
string s_tmp( MODULEC );
s_tmp.append( s_name );
s_ncur::get
().print( s_tmp.c_str() );
}
#endif
dynmod *mod = new dynmod; // encapsulates the function and module handler.
mod->the_func = the_func ; // the function to execute
mod->the_module = the_module; // the module handler to close if function
// is not needed anymore.
pthread_mutex_lock ( &mut_map_mods );
map_mods->add_elem ( mod, s_name );
pthread_mutex_unlock( &mut_map_mods );
// DO NOT CLOSE AS LONG THERE EXIST A POINTER TO THE FUNCTION
// dlclose( module );
return mod;
}
dynmod*
modl::get_module( string s_name )
{
#ifdef VERBOSE
pthread_mutex_lock ( &s_mutx::get
().mut_stdout );
cout << MODULER << s_name << endl;
pthread_mutex_unlock( &s_mutx::get
().mut_stdout );
#endif
#ifdef NCURSES
{
string s_tmp( MODULER );
s_tmp.append( s_name );
s_ncur::get
().print( s_tmp.c_str() );
}
#endif
pthread_mutex_lock ( &mut_map_mods );
dynmod* mod = map_mods->get_elem( s_name );
pthread_mutex_unlock( &mut_map_mods );
return ! mod ? cache_module( s_name ) : mod;
}
#endif
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