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cloudi.hpp
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//-*-Mode:C++;coding:utf-8;tab-width:4;c-basic-offset:4;indent-tabs-mode:()-*-
// ex: set ft=cpp fenc=utf-8 sts=4 ts=4 sw=4 et nomod:
//
// MIT License
//
// Copyright (c) 2011-2023 Michael Truog <mjtruog at protonmail dot com>
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//
#ifdef CLOUDI_H
#warning "Only need to include cloudi.hpp (C++), not cloudi.h (C)"
#endif
#ifndef CLOUDI_HPP
#define CLOUDI_HPP
#include <stdint.h>
#include <sstream>
#include <string>
#define CLOUDI_MAX_BUFFERSIZE 2147483648U /* 2GB */
typedef struct cloudi_instance_t cloudi_instance_t;
namespace CloudI
{
class API
{
public:
class function_object_cxx_const
{
public:
virtual ~function_object_cxx_const() throw() {}
virtual void operator() (API const &,
int const,
std::string const &,
std::string const &,
void const * const,
uint32_t const,
void const * const,
uint32_t const,
uint32_t,
int8_t,
char const * const,
char const * const,
uint32_t const) const = 0;
};
class function_object_c_const
{
public:
virtual ~function_object_c_const() throw() {}
virtual void operator() (API const &,
int const,
char const * const,
char const * const,
void const * const,
uint32_t const,
void const * const,
uint32_t const,
uint32_t,
int8_t,
char const * const,
char const * const,
uint32_t const) const = 0;
};
class function_object_cxx
{
public:
virtual ~function_object_cxx() throw() {}
virtual void operator() (API const &,
int const,
std::string const &,
std::string const &,
void const * const,
uint32_t const,
void const * const,
uint32_t const,
uint32_t,
int8_t,
char const * const,
char const * const,
uint32_t const) = 0;
};
class function_object_c
{
public:
virtual ~function_object_c() throw() {}
virtual void operator() (API const &,
int const,
char const * const,
char const * const,
void const * const,
uint32_t const,
void const * const,
uint32_t const,
uint32_t,
int8_t,
char const * const,
char const * const,
uint32_t const) = 0;
};
class callback_function_generic
{
public:
virtual ~callback_function_generic() throw() {}
virtual void operator () (int const,
char const * const,
char const * const,
void const * const,
uint32_t const,
void const * const,
uint32_t const,
uint32_t,
int8_t,
char const * const,
char const * const,
uint32_t const) = 0;
};
// request_type values
static int const ASYNC = 1;
static int const SYNC = -1;
API(unsigned int const thread_index,
bool const terminate_return_value = true);
static unsigned int thread_count();
int subscribe(std::string const & pattern,
function_object_cxx_const const & object) const;
int subscribe(char const * const pattern,
function_object_c_const const & object) const;
int subscribe(std::string const & pattern,
function_object_cxx & object) const;
int subscribe(char const * const pattern,
function_object_c & object) const;
int subscribe(std::string const & pattern,
function_object_cxx * object) const;
int subscribe(char const * const pattern,
function_object_c * object) const;
int subscribe(std::string const & pattern,
void (*f) (API const &,
int const,
std::string const &,
std::string const &,
void const * const,
uint32_t const,
void const * const,
uint32_t const,
uint32_t,
int8_t,
char const * const,
char const * const,
uint32_t const)) const;
int subscribe(char const * const pattern,
void (*f) (API const &,
int const,
std::string const &,
std::string const &,
void const * const,
uint32_t const,
void const * const,
uint32_t const,
uint32_t,
int8_t,
char const * const,
char const * const,
uint32_t const)) const;
int subscribe(std::string const & pattern,
void (*f) (API const &,
int const,
char const * const,
char const * const,
void const * const,
uint32_t const,
void const * const,
uint32_t const,
uint32_t,
int8_t,
char const * const,
char const * const,
uint32_t const)) const;
int subscribe(char const * const pattern,
void (*f) (API const &,
int const,
char const * const,
char const * const,
void const * const,
uint32_t const,
void const * const,
uint32_t const,
uint32_t,
int8_t,
char const * const,
char const * const,
uint32_t const)) const;
template <typename T>
int subscribe(std::string const & pattern,
T & object,
void (T::*f) (API const &,
int const,
std::string const &,
std::string const &,
void const * const,
uint32_t const,
void const * const,
uint32_t const,
uint32_t,
int8_t,
char const * const,
char const * const,
uint32_t const)) const;
template <typename T>
int subscribe(char const * const pattern,
T & object,
void (T::*f) (API const &,
int const,
std::string const &,
std::string const &,
void const * const,
uint32_t const,
void const * const,
uint32_t const,
uint32_t,
int8_t,
char const * const,
char const * const,
uint32_t const)) const;
template <typename T>
int subscribe(std::string const & pattern,
T & object,
void (T::*f) (API const &,
int const,
char const * const,
char const * const,
void const * const,
uint32_t const,
void const * const,
uint32_t const,
uint32_t,
int8_t,
char const * const,
char const * const,
uint32_t const)) const;
template <typename T>
int subscribe(char const * const pattern,
T & object,
void (T::*f) (API const &,
int const,
char const * const,
char const * const,
void const * const,
uint32_t const,
void const * const,
uint32_t const,
uint32_t,
int8_t,
char const * const,
char const * const,
uint32_t const)) const;
private:
int subscribe(char const * const pattern,
callback_function_generic * p) const;
public:
int subscribe_count(char const * const pattern) const;
inline int subscribe_count(std::string const & pattern) const
{
return subscribe_count(pattern.c_str());
}
int unsubscribe(char const * const pattern) const;
inline int unsubscribe(std::string const & pattern) const
{
return unsubscribe(pattern.c_str());
}
int send_async(char const * const name,
void const * const request,
uint32_t const request_size) const;
inline int send_async(std::string const & name,
void const * const request,
uint32_t const request_size) const
{
return send_async(name.c_str(),
request,
request_size);
}
int send_async(char const * const name,
void const * const request_info,
uint32_t const request_info_size,
void const * const request,
uint32_t const request_size,
uint32_t timeout,
int8_t const priority) const;
inline int send_async(std::string const & name,
void const * const request_info,
uint32_t const request_info_size,
void const * const request,
uint32_t const request_size,
uint32_t timeout,
int8_t const priority) const
{
return send_async(name.c_str(),
request_info,
request_info_size,
request,
request_size,
timeout,
priority);
}
int send_sync(char const * const name,
void const * const request,
uint32_t const request_size) const;
inline int send_sync(std::string const & name,
void const * const request,
uint32_t const request_size) const
{
return send_sync(name.c_str(),
request,
request_size);
}
int send_sync(char const * const name,
void const * const request_info,
uint32_t const request_info_size,
void const * const request,
uint32_t const request_size,
uint32_t timeout,
int8_t const priority) const;
inline int send_sync(std::string const & name,
void const * const request_info,
uint32_t const request_info_size,
void const * const request,
uint32_t const request_size,
uint32_t timeout,
int8_t const priority) const
{
return send_sync(name.c_str(),
request_info,
request_info_size,
request,
request_size,
timeout,
priority);
}
int mcast_async(char const * const name,
void const * const request,
uint32_t const request_size) const;
inline int mcast_async(std::string const & name,
void const * const request,
uint32_t const request_size) const
{
return mcast_async(name.c_str(),
request,
request_size);
}
int mcast_async(char const * const name,
void const * const request_info,
uint32_t const request_info_size,
void const * const request,
uint32_t const request_size,
uint32_t timeout,
int8_t const priority) const;
inline int mcast_async(std::string const & name,
void const * const request_info,
uint32_t const request_info_size,
void const * const request,
uint32_t const request_size,
uint32_t timeout,
int8_t const priority) const
{
return mcast_async(name.c_str(),
request_info,
request_info_size,
request,
request_size,
timeout,
priority);
}
char const * get_response() const;
uint32_t get_response_size() const;
char const * get_response_info() const;
uint32_t get_response_info_size() const;
uint32_t get_trans_id_count() const;
char const * get_trans_id(unsigned int const i = 0) const;
bool get_trans_id_null(unsigned int const i = 0) const;
uint32_t get_subscribe_count() const;
int forward_(int const request_type,
char const * const name,
void const * const request_info,
uint32_t const request_info_size,
void const * const request,
uint32_t const request_size,
uint32_t timeout,
int8_t const priority,
char const * const trans_id,
char const * const source,
uint32_t const source_size) const;
inline int forward_(int const request_type,
std::string const & name,
void const * const request_info,
uint32_t const request_info_size,
void const * const request,
uint32_t const request_size,
uint32_t timeout,
int8_t const priority,
char const * const trans_id,
char const * const source,
uint32_t const source_size) const
{
return forward_(request_type,
name.c_str(),
request_info,
request_info_size,
request,
request_size,
timeout,
priority,
trans_id,
source,
source_size);
}
int forward_async(char const * const name,
void const * const request_info,
uint32_t const request_info_size,
void const * const request,
uint32_t const request_size,
uint32_t timeout,
int8_t const priority,
char const * const trans_id,
char const * const source,
uint32_t const source_size) const;
inline int forward_async(std::string const & name,
void const * const request_info,
uint32_t const request_info_size,
void const * const request,
uint32_t const request_size,
uint32_t timeout,
int8_t const priority,
char const * const trans_id,
char const * const source,
uint32_t const source_size) const
{
return forward_async(name.c_str(),
request_info,
request_info_size,
request,
request_size,
timeout,
priority,
trans_id,
source,
source_size);
}
int forward_sync(char const * const name,
void const * const request_info,
uint32_t const request_info_size,
void const * const request,
uint32_t const request_size,
uint32_t timeout,
int8_t const priority,
char const * const trans_id,
char const * const source,
uint32_t const source_size) const;
inline int forward_sync(std::string const & name,
void const * const request_info,
uint32_t const request_info_size,
void const * const request,
uint32_t const request_size,
uint32_t timeout,
int8_t const priority,
char const * const trans_id,
char const * const source,
uint32_t const source_size) const
{
return forward_sync(name.c_str(),
request_info,
request_info_size,
request,
request_size,
timeout,
priority,
trans_id,
source,
source_size);
}
int return_(int const request_type,
char const * const name,
char const * const pattern,
void const * const response_info,
uint32_t const response_info_size,
void const * const response,
uint32_t const response_size,
uint32_t timeout,
char const * const trans_id,
char const * const source,
uint32_t const source_size) const;
inline int return_(int const request_type,
std::string const & name,
std::string const & pattern,
void const * const response_info,
uint32_t const response_info_size,
void const * const response,
uint32_t const response_size,
uint32_t timeout,
char const * const trans_id,
char const * const source,
uint32_t const source_size) const
{
return return_(request_type,
name.c_str(),
pattern.c_str(),
response_info,
response_info_size,
response,
response_size,
timeout,
trans_id,
source,
source_size);
}
int return_async(char const * const name,
char const * const pattern,
void const * const response_info,
uint32_t const response_info_size,
void const * const response,
uint32_t const response_size,
uint32_t timeout,
char const * const trans_id,
char const * const source,
uint32_t const source_size) const;
inline int return_async(std::string const & name,
std::string const & pattern,
void const * const response_info,
uint32_t const response_info_size,
void const * const response,
uint32_t const response_size,
uint32_t timeout,
char const * const trans_id,
char const * const source,
uint32_t const source_size) const
{
return return_async(name.c_str(),
pattern.c_str(),
response_info,
response_info_size,
response,
response_size,
timeout,
trans_id,
source,
source_size);
}
int return_sync(char const * const name,
char const * const pattern,
void const * const response_info,
uint32_t const response_info_size,
void const * const response,
uint32_t const response_size,
uint32_t timeout,
char const * const trans_id,
char const * const source,
uint32_t const source_size) const;
inline int return_sync(std::string const & name,
std::string const & pattern,
void const * const response_info,
uint32_t const response_info_size,
void const * const response,
uint32_t const response_size,
uint32_t timeout,
char const * const trans_id,
char const * const source,
uint32_t const source_size) const
{
return return_sync(name.c_str(),
pattern.c_str(),
response_info,
response_info_size,
response,
response_size,
timeout,
trans_id,
source,
source_size);
}
int recv_async() const;
int recv_async(uint32_t timeout) const;
int recv_async(char const * const trans_id) const;
int recv_async(uint32_t timeout,
char const * const trans_id) const;
inline int recv_async(uint32_t timeout,
std::string const & trans_id) const
{
return recv_async(timeout,
trans_id.c_str());
}
int recv_async(uint32_t timeout,
bool consume) const;
int recv_async(char const * const trans_id,
bool consume) const;
inline int recv_async(std::string const & trans_id,
bool consume) const
{
return recv_async(trans_id.c_str(),
consume);
}
int recv_async(uint32_t timeout,
char const * const trans_id,
bool consume) const;
inline int recv_async(uint32_t timeout,
std::string const & trans_id,
bool consume) const
{
return recv_async(timeout,
trans_id.c_str(),
consume);
}
uint32_t process_index() const;
static uint32_t process_index_();
uint32_t process_count() const;
uint32_t process_count_max() const;
static uint32_t process_count_max_();
uint32_t process_count_min() const;
static uint32_t process_count_min_();
char const * prefix() const;
uint32_t timeout_initialize() const;
static uint32_t timeout_initialize_();
uint32_t timeout_async() const;
uint32_t timeout_sync() const;
uint32_t timeout_terminate() const;
static uint32_t timeout_terminate_();
int8_t priority_default() const;
int poll(int timeout = -1) const;
int shutdown() const;
int shutdown(char const * const reason) const;
inline int shutdown(std::string const & reason) const
{
return shutdown(reason.c_str());
}
static char const ** info_key_value_parse(void const * const info,
uint32_t const info_size);
static void info_key_value_parse_destroy(char const ** pairs);
static char const * info_key_value_new(char const ** pairs,
uint32_t & info_size);
static char const * info_key_value_new(char const ** pairs,
uint32_t & info_size,
bool response);
// return/forward automatic delete/free
void free_with_delete() const;
void free_name() const;
void free_pattern() const;
void free_request_info() const;
void free_request() const;
void free_response_info() const;
void free_response() const;
// enumeration namespace that is valid with the C++98 standard
class return_value
{
public:
enum
{
success = 0,
// programs can use exit status
// values [1..6] without conflicts
// with internal cloudi error conditions
// API specific errors
terminate = 110, // error_poll_HUP
timeout = 7,
error_function_parameter = 8,
error_read_underflow = 9,
error_ei_decode = 10,
// reuse some exit status values from os_spawn
invalid_input = 11,
out_of_memory = 12,
// reuse some exit status values from GEPD
error_read_EAGAIN = 81,
error_read_EBADF = 82,
error_read_EFAULT = 83,
error_read_EINTR = 84,
error_read_EINVAL = 85,
error_read_EIO = 86,
error_read_EISDIR = 87,
error_read_null = 88,
error_read_overflow = 89,
error_read_unknown = 90,
error_write_EAGAIN = 91,
error_write_EBADF = 92,
error_write_EFAULT = 93,
error_write_EFBIG = 94,
error_write_EINTR = 95,
error_write_EINVAL = 96,
error_write_EIO = 97,
error_write_ENOSPC = 98,
error_write_EPIPE = 99,
error_write_null = 100,
error_write_overflow = 101,
error_write_unknown = 102,
error_ei_encode = 103,
error_poll_EBADF = 104,
error_poll_EFAULT = 105,
error_poll_EINTR = 106,
error_poll_EINVAL = 107,
error_poll_ENOMEM = 108,
error_poll_ERR = 109,
error_poll_HUP = 110,
error_poll_NVAL = 111,
error_poll_unknown = 112
};
};
typedef int return_value_type;
// Get the backtrace at the current point of execution
// (e.g., when throwing an exception):
// #include <boost/exception/all.hpp>
// ...
// typedef boost::error_info<struct stack, std::string> errinfo_stack;
// ...
// throw (boost::enable_error_info(e)
// << errinfo_stack(CloudI::API::backtrace()));
static std::string backtrace();
// Use fatal_error as the base class for exceptions
// that must cause the service process to restart
// (e.g., an assert exception).
// Any exceptions that use std::exception as the base class
// will cause a null response.
class fatal_error : public std::exception
{
public:
fatal_error() throw() {}
virtual ~fatal_error() throw() {}
virtual char const * what() const throw()
{
return "Fatal Error!";
}
};
class invalid_input_exception : public std::exception
{
public:
invalid_input_exception(int const status) throw()
{
std::ostringstream str;
str << "Invalid Input (" << status << ")";
m_what = str.str();
}
virtual ~invalid_input_exception() throw() {}
virtual char const * what() const throw()
{
return m_what.c_str();
}
private:
std::string m_what;
};
class return_async_exception : public std::exception
{
public:
return_async_exception() throw() {}
virtual ~return_async_exception() throw() {}
virtual char const * what() const throw()
{
return "Asynchronous Call Return Invalid";
}
};
class return_sync_exception : public std::exception
{
public:
return_sync_exception() throw() {}
virtual ~return_sync_exception() throw() {}
virtual char const * what() const throw()
{
return "Synchronous Call Return Invalid";
}
};
class forward_async_exception : public std::exception
{
public:
forward_async_exception() throw() {}
virtual ~forward_async_exception() throw() {}
virtual char const * what() const throw()
{
return "Asynchronous Call Forward Invalid";
}
};
class forward_sync_exception : public std::exception
{
public:
forward_sync_exception() throw() {}
virtual ~forward_sync_exception() throw() {}
virtual char const * what() const throw()
{
return "Synchronous Call Forward Invalid";
}
};
class terminate_exception : public std::exception
{
public:
terminate_exception(uint32_t const timeout) throw() :
m_timeout(timeout)
{
}
virtual ~terminate_exception() throw() {}
virtual char const * what() const throw()
{
return "Terminate";
}
uint32_t timeout() const
{
return m_timeout;
}
private:
uint32_t const m_timeout;
};
private:
class callback_function_cxx_or1;
class callback_function_cxx_or2;
class callback_function_cxx_or3;
class callback_function_cxx_or4;
class callback_function_cxx_op1;
class callback_function_cxx_op2;
class callback_function_cxx_s1;
class callback_function_cxx_s2;
template <typename T>
class callback_function_cxx_m1;
template <typename T>
class callback_function_cxx_m2;
class impl_t
{
public:
impl_t();
impl_t(impl_t const & impl);
~impl_t();
cloudi_instance_t * api() const;
private:
void * const m_p;
};
impl_t const m_impl;
};
// callback function object-reference type 1 (C++ const)
class API::callback_function_cxx_or1 : public callback_function_generic
{
public:
callback_function_cxx_or1(function_object_cxx_const const & object,
API const & api) :
m_object(object), m_api(api) {}
virtual ~callback_function_cxx_or1() throw() {}
virtual void operator () (int const request_type,
char const * const name,
char const * const pattern,
void const * const request_info,
uint32_t const request_info_size,
void const * const request,
uint32_t const request_size,
uint32_t timeout,
int8_t priority,
char const * const trans_id,
char const * const source,
uint32_t const source_size)
{
m_object(m_api,
request_type,
std::string(name),
std::string(pattern),
request_info,
request_info_size,
request,
request_size,
timeout,
priority,
trans_id,
source,
source_size);
}
private:
function_object_cxx_const const & m_object;
API const m_api;
};
// callback function object-reference type 2 (C const)
class API::callback_function_cxx_or2 : public callback_function_generic
{
public:
callback_function_cxx_or2(function_object_c_const const & object,
API const & api) :
m_object(object), m_api(api) {}
virtual ~callback_function_cxx_or2() throw() {}
virtual void operator () (int const request_type,
char const * const name,
char const * const pattern,
void const * const request_info,
uint32_t const request_info_size,
void const * const request,
uint32_t const request_size,