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// Copyright (C) 2007 Davis E. King (davis@dlib.net)
// License: Boost Software License See LICENSE.txt for the full license.
#ifndef DLIB_CONFIG_READER_THREAD_SAFe_
#define DLIB_CONFIG_READER_THREAD_SAFe_
#include "config_reader_kernel_abstract.h"
#include <string>
#include <iostream>
#include <sstream>
#include "../algs.h"
#include "../interfaces/enumerable.h"
#include "../threads.h"
#include "config_reader_thread_safe_abstract.h"
namespace dlib
{
template <
typename config_reader_base,
typename map_string_void
>
class config_reader_thread_safe_1
{
/*!
CONVENTION
- get_mutex() == *m
- *cr == the config reader being extended
- block_table[x] == (void*)&block(x)
- block_table.size() == the number of blocks in *cr
- block_table[key] == a config_reader_thread_safe_1 that contains &cr.block(key)
- if (own_pointers) then
- this object owns the m and cr pointers and should delete them when destructed
!*/
public:
config_reader_thread_safe_1 (
const config_reader_base* base,
rmutex* m_
);
config_reader_thread_safe_1();
typedef typename config_reader_base::config_reader_error config_reader_error;
typedef typename config_reader_base::config_reader_access_error config_reader_access_error;
config_reader_thread_safe_1(
std::istream& in
);
config_reader_thread_safe_1(
const std::string& config_file
);
virtual ~config_reader_thread_safe_1(
);
void clear (
);
void load_from (
std::istream& in
);
void load_from (
const std::string& config_file
);
bool is_key_defined (
const std::string& key
) const;
bool is_block_defined (
const std::string& name
) const;
typedef config_reader_thread_safe_1 this_type;
const this_type& block (
const std::string& name
) const;
const std::string& operator[] (
const std::string& key
) const;
template <
typename queue_of_strings
>
void get_keys (
queue_of_strings& keys
) const;
template <
typename queue_of_strings
>
void get_blocks (
queue_of_strings& blocks
) const;
inline const rmutex& get_mutex (
) const;
private:
void fill_block_table (
);
/*!
ensures
- block_table.size() == the number of blocks in cr
- block_table[key] == a config_reader_thread_safe_1 that contains &cr.block(key)
!*/
rmutex* m;
config_reader_base* cr;
map_string_void block_table;
const bool own_pointers;
// restricted functions
config_reader_thread_safe_1(config_reader_thread_safe_1&);
config_reader_thread_safe_1& operator=(config_reader_thread_safe_1&);
};
// ----------------------------------------------------------------------------------------
// ----------------------------------------------------------------------------------------
// member function definitions
// ----------------------------------------------------------------------------------------
// ----------------------------------------------------------------------------------------
template <
typename config_reader_base,
typename map_string_void
>
config_reader_thread_safe_1<config_reader_base,map_string_void>::
config_reader_thread_safe_1(
const config_reader_base* base,
rmutex* m_
) :
m(m_),
cr(const_cast<config_reader_base*>(base)),
own_pointers(false)
{
fill_block_table();
}
// ----------------------------------------------------------------------------------------
template <
typename config_reader_base,
typename map_string_void
>
config_reader_thread_safe_1<config_reader_base,map_string_void>::
config_reader_thread_safe_1(
) :
m(0),
cr(0),
own_pointers(true)
{
try
{
m = new rmutex;
cr = new config_reader_base;
}
catch (...)
{
if (m) delete m;
if (cr) delete cr;
throw;
}
}
// ----------------------------------------------------------------------------------------
template <
typename config_reader_base,
typename map_string_void
>
void config_reader_thread_safe_1<config_reader_base,map_string_void>::
clear(
)
{
auto_mutex M(*m);
cr->clear();
fill_block_table();
}
// ----------------------------------------------------------------------------------------
template <
typename config_reader_base,
typename map_string_void
>
void config_reader_thread_safe_1<config_reader_base,map_string_void>::
load_from(
std::istream& in
)
{
auto_mutex M(*m);
cr->load_from(in);
fill_block_table();
}
// ----------------------------------------------------------------------------------------
template <
typename config_reader_base,
typename map_string_void
>
void config_reader_thread_safe_1<config_reader_base,map_string_void>::
load_from(
const std::string& config_file
)
{
auto_mutex M(*m);
cr->load_from(config_file);
fill_block_table();
}
// ----------------------------------------------------------------------------------------
template <
typename config_reader_base,
typename map_string_void
>
config_reader_thread_safe_1<config_reader_base,map_string_void>::
config_reader_thread_safe_1(
std::istream& in
) :
m(0),
cr(0),
own_pointers(true)
{
try
{
m = new rmutex;
cr = new config_reader_base(in);
fill_block_table();
}
catch (...)
{
if (m) delete m;
if (cr) delete cr;
throw;
}
}
// ----------------------------------------------------------------------------------------
template <
typename config_reader_base,
typename map_string_void
>
config_reader_thread_safe_1<config_reader_base,map_string_void>::
config_reader_thread_safe_1(
const std::string& config_file
) :
m(0),
cr(0),
own_pointers(true)
{
try
{
m = new rmutex;
cr = new config_reader_base(config_file);
fill_block_table();
}
catch (...)
{
if (m) delete m;
if (cr) delete cr;
throw;
}
}
// ----------------------------------------------------------------------------------------
template <
typename config_reader_base,
typename map_string_void
>
config_reader_thread_safe_1<config_reader_base,map_string_void>::
~config_reader_thread_safe_1(
)
{
if (own_pointers)
{
delete m;
delete cr;
}
// clear out the block table
block_table.reset();
while (block_table.move_next())
{
delete static_cast<config_reader_thread_safe_1*>(block_table.element().value());
}
block_table.clear();
}
// ----------------------------------------------------------------------------------------
template <
typename config_reader_base,
typename map_string_void
>
bool config_reader_thread_safe_1<config_reader_base,map_string_void>::
is_key_defined (
const std::string& key
) const
{
auto_mutex M(*m);
return cr->is_key_defined(key);
}
// ----------------------------------------------------------------------------------------
template <
typename config_reader_base,
typename map_string_void
>
bool config_reader_thread_safe_1<config_reader_base,map_string_void>::
is_block_defined (
const std::string& name
) const
{
auto_mutex M(*m);
return cr->is_block_defined(name);
}
// ----------------------------------------------------------------------------------------
template <
typename config_reader_base,
typename map_string_void
>
const config_reader_thread_safe_1<config_reader_base,map_string_void>& config_reader_thread_safe_1<config_reader_base,map_string_void>::
block (
const std::string& name
) const
{
auto_mutex M(*m);
if (block_table.is_in_domain(name) == false)
{
throw config_reader_access_error(name,"");
}
return *static_cast<config_reader_thread_safe_1*>(block_table[name]);
}
// ----------------------------------------------------------------------------------------
template <
typename config_reader_base,
typename map_string_void
>
const std::string& config_reader_thread_safe_1<config_reader_base,map_string_void>::
operator[] (
const std::string& key
) const
{
auto_mutex M(*m);
return (*cr)[key];
}
// ----------------------------------------------------------------------------------------
template <
typename config_reader_base,
typename map_string_void
>
template <
typename queue_of_strings
>
void config_reader_thread_safe_1<config_reader_base,map_string_void>::
get_keys (
queue_of_strings& keys
) const
{
auto_mutex M(*m);
cr->get_keys(keys);
}
// ----------------------------------------------------------------------------------------
template <
typename config_reader_base,
typename map_string_void
>
template <
typename queue_of_strings
>
void config_reader_thread_safe_1<config_reader_base,map_string_void>::
get_blocks (
queue_of_strings& blocks
) const
{
auto_mutex M(*m);
cr->get_blocks(blocks);
}
// ----------------------------------------------------------------------------------------
template <
typename config_reader_base,
typename map_string_void
>
const rmutex& config_reader_thread_safe_1<config_reader_base,map_string_void>::
get_mutex (
) const
{
return *m;
}
// ----------------------------------------------------------------------------------------
// ----------------------------------------------------------------------------------------
// private member functions
// ----------------------------------------------------------------------------------------
// ----------------------------------------------------------------------------------------
template <
typename config_reader_base,
typename map_string_void
>
void config_reader_thread_safe_1<config_reader_base,map_string_void>::
fill_block_table (
)
{
using namespace std;
// first empty out the block table
block_table.reset();
while (block_table.move_next())
{
delete static_cast<config_reader_thread_safe_1*>(block_table.element().value());
}
block_table.clear();
std::vector<std::string> blocks;
cr->get_blocks(blocks);
// now fill the block table up to match what is in cr
for (unsigned long i = 0; i < blocks.size(); ++i)
{
config_reader_thread_safe_1* block = new config_reader_thread_safe_1(&cr->block(blocks[i]),m);
void* temp = block;
block_table.add(blocks[i],temp);
}
}
// ----------------------------------------------------------------------------------------
}
#endif // DLIB_CONFIG_READER_THREAD_SAFe_
|
