mirror of
https://github.com/monero-project/monero.git
synced 2024-12-15 04:46:31 +02:00
463 lines
13 KiB
C++
463 lines
13 KiB
C++
// Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
|
|
// All rights reserved.
|
|
//
|
|
// Redistribution and use in source and binary forms, with or without
|
|
// modification, are permitted provided that the following conditions are met:
|
|
// * Redistributions of source code must retain the above copyright
|
|
// notice, this list of conditions and the following disclaimer.
|
|
// * Redistributions in binary form must reproduce the above copyright
|
|
// notice, this list of conditions and the following disclaimer in the
|
|
// documentation and/or other materials provided with the distribution.
|
|
// * Neither the name of the Andrey N. Sabelnikov nor the
|
|
// names of its contributors may be used to endorse or promote products
|
|
// derived from this software without specific prior written permission.
|
|
//
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
|
|
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER BE LIABLE FOR ANY
|
|
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
|
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
//
|
|
|
|
#pragma once
|
|
|
|
#include <atomic>
|
|
#include <condition_variable>
|
|
#include <functional>
|
|
#include <mutex>
|
|
#include <thread>
|
|
|
|
namespace epee
|
|
{
|
|
class async_stdin_reader
|
|
{
|
|
public:
|
|
async_stdin_reader()
|
|
: m_run(true)
|
|
, m_has_read_request(false)
|
|
, m_read_status(state_init)
|
|
{
|
|
m_reader_thread = std::thread(std::bind(&async_stdin_reader::reader_thread_func, this));
|
|
}
|
|
|
|
~async_stdin_reader()
|
|
{
|
|
stop();
|
|
}
|
|
|
|
// Not thread safe. Only one thread can call this method at once.
|
|
bool get_line(std::string& line)
|
|
{
|
|
if (!start_read())
|
|
return false;
|
|
|
|
std::unique_lock<std::mutex> lock(m_response_mutex);
|
|
while (state_init == m_read_status)
|
|
{
|
|
m_response_cv.wait(lock);
|
|
}
|
|
|
|
bool res = false;
|
|
if (state_success == m_read_status)
|
|
{
|
|
line = m_line;
|
|
res = true;
|
|
}
|
|
|
|
m_read_status = state_init;
|
|
|
|
return res;
|
|
}
|
|
|
|
void stop()
|
|
{
|
|
if (m_run)
|
|
{
|
|
m_run.store(false, std::memory_order_relaxed);
|
|
|
|
#if defined(WIN32)
|
|
::CloseHandle(::GetStdHandle(STD_INPUT_HANDLE));
|
|
#endif
|
|
|
|
m_request_cv.notify_one();
|
|
m_reader_thread.join();
|
|
}
|
|
}
|
|
|
|
private:
|
|
bool start_read()
|
|
{
|
|
std::unique_lock<std::mutex> lock(m_request_mutex);
|
|
if (!m_run.load(std::memory_order_relaxed) || m_has_read_request)
|
|
return false;
|
|
|
|
m_has_read_request = true;
|
|
m_request_cv.notify_one();
|
|
return true;
|
|
}
|
|
|
|
bool wait_read()
|
|
{
|
|
std::unique_lock<std::mutex> lock(m_request_mutex);
|
|
while (m_run.load(std::memory_order_relaxed) && !m_has_read_request)
|
|
{
|
|
m_request_cv.wait(lock);
|
|
}
|
|
|
|
if (m_has_read_request)
|
|
{
|
|
m_has_read_request = false;
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool wait_stdin_data()
|
|
{
|
|
#if !defined(WIN32)
|
|
int stdin_fileno = ::fileno(stdin);
|
|
|
|
while (m_run.load(std::memory_order_relaxed))
|
|
{
|
|
fd_set read_set;
|
|
FD_ZERO(&read_set);
|
|
FD_SET(stdin_fileno, &read_set);
|
|
|
|
struct timeval tv;
|
|
tv.tv_sec = 0;
|
|
tv.tv_usec = 100 * 1000;
|
|
|
|
int retval = ::select(stdin_fileno + 1, &read_set, NULL, NULL, &tv);
|
|
if (retval < 0)
|
|
return false;
|
|
else if (0 < retval)
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
return true;
|
|
}
|
|
|
|
void reader_thread_func()
|
|
{
|
|
while (true)
|
|
{
|
|
if (!wait_read())
|
|
break;
|
|
|
|
std::string line;
|
|
bool read_ok = true;
|
|
if (wait_stdin_data())
|
|
{
|
|
if (m_run.load(std::memory_order_relaxed))
|
|
{
|
|
std::getline(std::cin, line);
|
|
read_ok = !std::cin.eof() && !std::cin.fail();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
read_ok = false;
|
|
}
|
|
|
|
{
|
|
std::unique_lock<std::mutex> lock(m_response_mutex);
|
|
if (m_run.load(std::memory_order_relaxed))
|
|
{
|
|
m_line = std::move(line);
|
|
m_read_status = read_ok ? state_success : state_error;
|
|
}
|
|
else
|
|
{
|
|
m_read_status = state_cancelled;
|
|
}
|
|
m_response_cv.notify_one();
|
|
}
|
|
}
|
|
}
|
|
|
|
enum t_state
|
|
{
|
|
state_init,
|
|
state_success,
|
|
state_error,
|
|
state_cancelled
|
|
};
|
|
|
|
private:
|
|
std::thread m_reader_thread;
|
|
std::atomic<bool> m_run;
|
|
|
|
std::string m_line;
|
|
bool m_has_read_request;
|
|
t_state m_read_status;
|
|
|
|
std::mutex m_request_mutex;
|
|
std::mutex m_response_mutex;
|
|
std::condition_variable m_request_cv;
|
|
std::condition_variable m_response_cv;
|
|
};
|
|
|
|
|
|
template<class t_server>
|
|
bool empty_commands_handler(t_server* psrv, const std::string& command)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
|
|
class async_console_handler
|
|
{
|
|
public:
|
|
async_console_handler()
|
|
{
|
|
}
|
|
|
|
template<class t_server, class chain_handler>
|
|
bool run(t_server* psrv, chain_handler ch_handler, const std::string& prompt = "#", const std::string& usage = "")
|
|
{
|
|
return run(prompt, usage, [&](const std::string& cmd) { return ch_handler(psrv, cmd); }, [&] { psrv->send_stop_signal(); });
|
|
}
|
|
|
|
template<class chain_handler>
|
|
bool run(chain_handler ch_handler, const std::string& prompt = "#", const std::string& usage = "")
|
|
{
|
|
return run(prompt, usage, [&](const std::string& cmd) { return ch_handler(cmd); }, [] { });
|
|
}
|
|
|
|
void stop()
|
|
{
|
|
m_running = false;
|
|
m_stdin_reader.stop();
|
|
}
|
|
|
|
private:
|
|
template<typename t_cmd_handler, typename t_exit_handler>
|
|
bool run(const std::string& prompt, const std::string& usage, const t_cmd_handler& cmd_handler, const t_exit_handler& exit_handler)
|
|
{
|
|
TRY_ENTRY();
|
|
bool continue_handle = true;
|
|
while(continue_handle)
|
|
{
|
|
if (!m_running)
|
|
{
|
|
break;
|
|
}
|
|
if (!prompt.empty())
|
|
{
|
|
epee::log_space::set_console_color(epee::log_space::console_color_yellow, true);
|
|
std::cout << prompt;
|
|
if (' ' != prompt.back())
|
|
std::cout << ' ';
|
|
epee::log_space::reset_console_color();
|
|
std::cout.flush();
|
|
}
|
|
|
|
std::string command;
|
|
if(!m_stdin_reader.get_line(command))
|
|
{
|
|
LOG_PRINT("Failed to read line.", LOG_LEVEL_0);
|
|
}
|
|
string_tools::trim(command);
|
|
|
|
LOG_PRINT_L2("Read command: " << command);
|
|
if(0 == command.compare("exit") || 0 == command.compare("q"))
|
|
{
|
|
continue_handle = false;
|
|
}else if (command.empty())
|
|
{
|
|
continue;
|
|
}
|
|
else if(cmd_handler(command))
|
|
{
|
|
continue;
|
|
} else
|
|
{
|
|
std::cout << "unknown command: " << command << std::endl;
|
|
std::cout << usage;
|
|
}
|
|
}
|
|
exit_handler();
|
|
return true;
|
|
CATCH_ENTRY_L0("console_handler", false);
|
|
}
|
|
|
|
private:
|
|
async_stdin_reader m_stdin_reader;
|
|
bool m_running = true;
|
|
};
|
|
|
|
|
|
template<class t_server, class t_handler>
|
|
bool start_default_console(t_server* ptsrv, t_handler handlr, const std::string& prompt, const std::string& usage = "")
|
|
{
|
|
std::shared_ptr<async_console_handler> console_handler = std::make_shared<async_console_handler>();
|
|
boost::thread([=](){console_handler->run<t_server, t_handler>(ptsrv, handlr, prompt, usage);}).detach();
|
|
return true;
|
|
}
|
|
|
|
template<class t_server>
|
|
bool start_default_console(t_server* ptsrv, const std::string& prompt, const std::string& usage = "")
|
|
{
|
|
return start_default_console(ptsrv, empty_commands_handler<t_server>, prompt, usage);
|
|
}
|
|
|
|
template<class t_server, class t_handler>
|
|
bool no_srv_param_adapter(t_server* ptsrv, const std::string& cmd, t_handler handlr)
|
|
{
|
|
return handlr(cmd);
|
|
}
|
|
|
|
template<class t_server, class t_handler>
|
|
bool run_default_console_handler_no_srv_param(t_server* ptsrv, t_handler handlr, const std::string& prompt, const std::string& usage = "")
|
|
{
|
|
async_console_handler console_handler;
|
|
return console_handler.run(ptsrv, boost::bind<bool>(no_srv_param_adapter<t_server, t_handler>, _1, _2, handlr), prompt, usage);
|
|
}
|
|
|
|
template<class t_server, class t_handler>
|
|
bool start_default_console_handler_no_srv_param(t_server* ptsrv, t_handler handlr, const std::string& prompt, const std::string& usage = "")
|
|
{
|
|
boost::thread( boost::bind(run_default_console_handler_no_srv_param<t_server, t_handler>, ptsrv, handlr, prompt, usage) );
|
|
return true;
|
|
}
|
|
|
|
/*template<class a>
|
|
bool f(int i, a l)
|
|
{
|
|
return true;
|
|
}*/
|
|
/*
|
|
template<class chain_handler>
|
|
bool default_console_handler2(chain_handler ch_handler, const std::string usage)
|
|
*/
|
|
|
|
|
|
/*template<class t_handler>
|
|
bool start_default_console2(t_handler handlr, const std::string& usage = "")
|
|
{
|
|
//std::string usage_local = usage;
|
|
boost::thread( boost::bind(default_console_handler2<t_handler>, handlr, usage) );
|
|
//boost::function<bool ()> p__ = boost::bind(f<t_handler>, 1, handlr);
|
|
//boost::function<bool ()> p__ = boost::bind(default_console_handler2<t_handler>, handlr, usage);
|
|
//boost::thread tr(p__);
|
|
return true;
|
|
}*/
|
|
|
|
/************************************************************************/
|
|
/* */
|
|
/************************************************************************/
|
|
class console_handlers_binder
|
|
{
|
|
typedef boost::function<bool (const std::vector<std::string> &)> console_command_handler;
|
|
typedef std::map<std::string, std::pair<console_command_handler, std::string> > command_handlers_map;
|
|
std::unique_ptr<boost::thread> m_console_thread;
|
|
command_handlers_map m_command_handlers;
|
|
async_console_handler m_console_handler;
|
|
public:
|
|
std::string get_usage()
|
|
{
|
|
std::stringstream ss;
|
|
size_t max_command_len = 0;
|
|
for(auto& x:m_command_handlers)
|
|
if(x.first.size() > max_command_len)
|
|
max_command_len = x.first.size();
|
|
|
|
for(auto& x:m_command_handlers)
|
|
{
|
|
ss.width(max_command_len + 3);
|
|
ss << std::left << x.first << x.second.second << ENDL;
|
|
}
|
|
return ss.str();
|
|
}
|
|
void set_handler(const std::string& cmd, const console_command_handler& hndlr, const std::string& usage = "")
|
|
{
|
|
command_handlers_map::mapped_type & vt = m_command_handlers[cmd];
|
|
vt.first = hndlr;
|
|
vt.second = usage;
|
|
}
|
|
bool process_command_vec(const std::vector<std::string>& cmd)
|
|
{
|
|
if(!cmd.size())
|
|
return false;
|
|
auto it = m_command_handlers.find(cmd.front());
|
|
if(it == m_command_handlers.end())
|
|
return false;
|
|
std::vector<std::string> cmd_local(cmd.begin()+1, cmd.end());
|
|
return it->second.first(cmd_local);
|
|
}
|
|
|
|
bool process_command_str(const std::string& cmd)
|
|
{
|
|
std::vector<std::string> cmd_v;
|
|
boost::split(cmd_v,cmd,boost::is_any_of(" "), boost::token_compress_on);
|
|
return process_command_vec(cmd_v);
|
|
}
|
|
|
|
/*template<class t_srv>
|
|
bool start_handling(t_srv& srv, const std::string& usage_string = "")
|
|
{
|
|
start_default_console_handler_no_srv_param(&srv, boost::bind(&console_handlers_binder::process_command_str, this, _1));
|
|
return true;
|
|
}*/
|
|
|
|
bool start_handling(const std::string& prompt, const std::string& usage_string = "")
|
|
{
|
|
m_console_thread.reset(new boost::thread(boost::bind(&console_handlers_binder::run_handling, this, prompt, usage_string)));
|
|
m_console_thread->detach();
|
|
return true;
|
|
}
|
|
|
|
void stop_handling()
|
|
{
|
|
m_console_handler.stop();
|
|
}
|
|
|
|
bool run_handling(const std::string& prompt, const std::string& usage_string)
|
|
{
|
|
return m_console_handler.run(boost::bind(&console_handlers_binder::process_command_str, this, _1), prompt, usage_string);
|
|
}
|
|
|
|
/*template<class t_srv>
|
|
bool run_handling(t_srv& srv, const std::string& usage_string)
|
|
{
|
|
return run_default_console_handler_no_srv_param(&srv, boost::bind<bool>(&console_handlers_binder::process_command_str, this, _1), usage_string);
|
|
}*/
|
|
};
|
|
|
|
/* work around because of broken boost bind */
|
|
template<class t_server>
|
|
class srv_console_handlers_binder: public console_handlers_binder
|
|
{
|
|
bool process_command_str(t_server* /*psrv*/, const std::string& cmd)
|
|
{
|
|
return console_handlers_binder::process_command_str(cmd);
|
|
}
|
|
public:
|
|
bool start_handling(t_server* psrv, const std::string& prompt, const std::string& usage_string = "")
|
|
{
|
|
boost::thread(boost::bind(&srv_console_handlers_binder<t_server>::run_handling, this, psrv, prompt, usage_string)).detach();
|
|
return true;
|
|
}
|
|
|
|
bool run_handling(t_server* psrv, const std::string& prompt, const std::string& usage_string)
|
|
{
|
|
return m_console_handler.run(psrv, boost::bind(&srv_console_handlers_binder<t_server>::process_command_str, this, _1, _2), prompt, usage_string);
|
|
}
|
|
|
|
void stop_handling()
|
|
{
|
|
m_console_handler.stop();
|
|
}
|
|
|
|
private:
|
|
async_console_handler m_console_handler;
|
|
};
|
|
}
|