/usr/include/caf/detail/logging.hpp is in libcaf-dev 0.13.2-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* ____ _ _____ *
* / ___| / \ | ___| C++ *
* | | / _ \ | |_ Actor *
* | |___ / ___ \| _| Framework *
* \____/_/ \_|_| *
* *
* Copyright (C) 2011 - 2015 *
* Dominik Charousset <dominik.charousset (at) haw-hamburg.de> *
* *
* Distributed under the terms and conditions of the BSD 3-Clause License or *
* (at your option) under the terms and conditions of the Boost Software *
* License 1.0. See accompanying files LICENSE and LICENSE_ALTERNATIVE. *
* *
* If you did not receive a copy of the license files, see *
* http://opensource.org/licenses/BSD-3-Clause and *
* http://www.boost.org/LICENSE_1_0.txt. *
******************************************************************************/
#ifndef CAF_LOGGING_HPP
#define CAF_LOGGING_HPP
#include <thread>
#include <cstring>
#include <sstream>
#include <iostream>
#include <type_traits>
#include <unordered_map>
#include "caf/config.hpp"
#include "caf/to_string.hpp"
#include "caf/abstract_actor.hpp"
#include "caf/detail/singletons.hpp"
#include "caf/detail/scope_guard.hpp"
#include "caf/detail/shared_spinlock.hpp"
/*
* To enable logging, you have to define CAF_DEBUG. This enables
* CAF_LOG_ERROR messages. To enable more debugging output, you can
* define CAF_LOG_LEVEL to:
* 1: + warning
* 2: + info
* 3: + debug
* 4: + trace (prints for each logged method entry and exit message)
*
* Note: this logger emits log4j style XML output; logs are best viewed
* using a log4j viewer, e.g., http://code.google.com/p/otroslogviewer/
*
*/
namespace caf {
namespace detail {
class singletons;
class logging {
public:
friend class detail::singletons;
// returns the actor ID for the current thread or 0 if none is assigned
actor_id get_aid();
// associates given actor id with this thread,
// returns the previously set actor id
actor_id set_aid(actor_id aid);
virtual void log(const char* level, const char* class_name,
const char* function_name, const char* file_name,
int line_num, const std::string& msg) = 0;
class trace_helper {
public:
trace_helper(std::string class_name, const char* fun_name,
const char* file_name, int line_num, const std::string& msg);
~trace_helper();
private:
std::string m_class;
const char* m_fun_name;
const char* m_file_name;
int m_line_num;
};
protected:
virtual ~logging();
static logging* create_singleton();
virtual void initialize() = 0;
virtual void stop() = 0;
inline void dispose() {
delete this;
}
private:
detail::shared_spinlock m_aids_lock;
std::unordered_map<std::thread::id, actor_id> m_aids;
};
struct oss_wr {
inline oss_wr() {
// nop
}
inline oss_wr(oss_wr&& other) : m_str(std::move(other.m_str)) {
// nop
}
std::string m_str;
inline std::string str() {
return std::move(m_str);
}
};
inline oss_wr operator<<(oss_wr&& lhs, std::string str) {
lhs.m_str += std::move(str);
return std::move(lhs);
}
inline oss_wr operator<<(oss_wr&& lhs, const char* str) {
lhs.m_str += str;
return std::move(lhs);
}
template <class T>
oss_wr operator<<(oss_wr&& lhs, T rhs) {
std::ostringstream oss;
oss << rhs;
lhs.m_str += oss.str();
return std::move(lhs);
}
} // namespace detail
} // namespace caf
#define CAF_VOID_STMT static_cast<void>(0)
#define CAF_CAT(a, b) a##b
#define CAF_ERROR 0
#define CAF_WARNING 1
#define CAF_INFO 2
#define CAF_DEBUG 3
#define CAF_TRACE 4
#define CAF_LVL_NAME0() "ERROR"
#define CAF_LVL_NAME1() "WARN "
#define CAF_LVL_NAME2() "INFO "
#define CAF_LVL_NAME3() "DEBUG"
#define CAF_LVL_NAME4() "TRACE"
#define CAF_CONCAT_(LHS, RHS) LHS ## RHS
#define CAF_CONCAT(LHS, RHS) CAF_CONCAT_(LHS, RHS)
#define CAF_UNIFYN(NAME) CAF_CONCAT(NAME, __LINE__)
#define CAF_PRINT_ERROR_IMPL(lvlname, classname, funname, message) \
{ \
std::cerr << "[" << lvlname << "] " << classname << "::" << funname \
<< ": " << message << "\n"; \
} \
CAF_VOID_STMT
#ifndef CAF_LOG_LEVEL
inline caf::actor_id caf_set_aid_dummy() { return 0; }
#define CAF_LOG_IMPL(lvlname, classname, funname, message) \
CAF_PRINT_ERROR_IMPL(lvlname, classname, funname, message)
#define CAF_PUSH_AID(unused) static_cast<void>(0)
#define CAF_PUSH_AID_FROM_PTR(unused) static_cast<void>(0)
#define CAF_SET_AID(unused) caf_set_aid_dummy()
#else
#define CAF_LOG_IMPL(lvlname, classname, funname, message) \
if (strcmp(lvlname, "ERROR") == 0) { \
CAF_PRINT_ERROR_IMPL(lvlname, classname, funname, message); \
} \
caf::detail::singletons::get_logger()->log(lvlname, classname, funname, \
__FILE__, __LINE__, \
(caf::detail::oss_wr{} \
<< std::boolalpha \
<< message).str())
#define CAF_PUSH_AID(aid_arg) \
auto CAF_UNIFYN(caf_aid_tmp) \
= caf::detail::singletons::get_logger()->set_aid(aid_arg); \
auto CAF_UNIFYN(aid_aid_tmp_guard) = caf::detail::make_scope_guard([=] { \
caf::detail::singletons::get_logger()->set_aid(CAF_UNIFYN(caf_aid_tmp)); \
})
#define CAF_PUSH_AID_FROM_PTR(some_ptr) \
auto CAF_UNIFYN(caf_aid_ptr) = some_ptr; \
CAF_PUSH_AID(CAF_UNIFYN(caf_aid_ptr) ? CAF_UNIFYN(caf_aid_ptr)->id() : 0)
#define CAF_SET_AID(aid_arg) \
caf::detail::singletons::get_logger()->set_aid(aid_arg)
#endif
#define CAF_PRINT0(lvlname, classname, funname, msg) \
CAF_LOG_IMPL(lvlname, classname, funname, msg)
#define CAF_PRINT_IF0(stmt, lvlname, classname, funname, msg) \
if (stmt) { \
CAF_LOG_IMPL(lvlname, classname, funname, msg); \
} \
CAF_VOID_STMT
#define CAF_PRINT1(lvlname, classname, funname, msg) \
CAF_PRINT0(lvlname, classname, funname, msg)
#define CAF_PRINT_IF1(stmt, lvlname, classname, funname, msg) \
CAF_PRINT_IF0(stmt, lvlname, classname, funname, msg)
#if !defined(CAF_LOG_LEVEL) || CAF_LOG_LEVEL < CAF_TRACE
#define CAF_PRINT4(arg0, arg1, arg2, arg3)
#else
#define CAF_PRINT4(lvlname, classname, funname, msg) \
caf::detail::logging::trace_helper CAF_UNIFYN(caf_log_trace_) { \
classname, funname, __FILE__, __LINE__, \
(caf::detail::oss_wr{} << msg).str() \
}
#endif
#if !defined(CAF_LOG_LEVEL) || CAF_LOG_LEVEL < CAF_DEBUG
#define CAF_PRINT3(arg0, arg1, arg2, arg3)
#define CAF_PRINT_IF3(arg0, arg1, arg2, arg3, arg4)
#else
#define CAF_PRINT3(lvlname, classname, funname, msg) \
CAF_PRINT0(lvlname, classname, funname, msg)
#define CAF_PRINT_IF3(stmt, lvlname, classname, funname, msg) \
CAF_PRINT_IF0(stmt, lvlname, classname, funname, msg)
#endif
#if !defined(CAF_LOG_LEVEL) || CAF_LOG_LEVEL < CAF_INFO
#define CAF_PRINT2(arg0, arg1, arg2, arg3)
#define CAF_PRINT_IF2(arg0, arg1, arg2, arg3, arg4)
#else
#define CAF_PRINT2(lvlname, classname, funname, msg) \
CAF_PRINT0(lvlname, classname, funname, msg)
#define CAF_PRINT_IF2(stmt, lvlname, classname, funname, msg) \
CAF_PRINT_IF0(stmt, lvlname, classname, funname, msg)
#endif
#define CAF_EVAL(what) what
/**
* @def CAF_LOGC
* Logs a message with custom class and function names.
*/
#define CAF_LOGC(level, classname, funname, msg) \
CAF_CAT(CAF_PRINT, level)(CAF_CAT(CAF_LVL_NAME, level)(), classname, \
funname, msg)
/**
* @def CAF_LOGF
* Logs a message inside a free function.
*/
#define CAF_LOGF(level, msg) CAF_LOGC(level, "NONE", __func__, msg)
/**
* @def CAF_LOGMF
* Logs a message inside a member function.
*/
#define CAF_LOGMF(level, msg) \
CAF_LOGC(level, typeid(*this).name(), __func__, msg)
/**
* @def CAF_LOGC
* Logs a message with custom class and function names.
*/
#define CAF_LOGC_IF(stmt, level, classname, funname, msg) \
CAF_CAT(CAF_PRINT_IF, level)(stmt, CAF_CAT(CAF_LVL_NAME, level)(), \
classname, funname, msg)
/**
* @def CAF_LOGF
* Logs a message inside a free function.
*/
#define CAF_LOGF_IF(stmt, level, msg) \
CAF_LOGC_IF(stmt, level, "NONE", __func__, msg)
/**
* @def CAF_LOGMF
* Logs a message inside a member function.
*/
#define CAF_LOGMF_IF(stmt, level, msg) \
CAF_LOGC_IF(stmt, level, typeid(*this).name(), __func__, msg)
// convenience macros to safe some typing when printing arguments
#define CAF_ARG(arg) #arg << " = " << arg
#define CAF_TARG(arg, trans) #arg << " = " << trans(arg)
#define CAF_MARG(arg, memfun) #arg << " = " << arg.memfun()
#define CAF_TSARG(arg) #arg << " = " << to_string(arg)
/******************************************************************************
* convenience macros *
******************************************************************************/
#define CAF_LOG_ERROR(msg) CAF_LOGMF(CAF_ERROR, msg)
#define CAF_LOG_WARNING(msg) CAF_LOGMF(CAF_WARNING, msg)
#define CAF_LOG_DEBUG(msg) CAF_LOGMF(CAF_DEBUG, msg)
#define CAF_LOG_INFO(msg) CAF_LOGMF(CAF_INFO, msg)
#define CAF_LOG_TRACE(msg) CAF_LOGMF(CAF_TRACE, msg)
#define CAF_LOG_ERROR_IF(stmt, msg) CAF_LOGMF_IF(stmt, CAF_ERROR, msg)
#define CAF_LOG_WARNING_IF(stmt, msg) CAF_LOGMF_IF(stmt, CAF_WARNING, msg)
#define CAF_LOG_DEBUG_IF(stmt, msg) CAF_LOGMF_IF(stmt, CAF_DEBUG, msg)
#define CAF_LOG_INFO_IF(stmt, msg) CAF_LOGMF_IF(stmt, CAF_INFO, msg)
#define CAF_LOG_TRACE_IF(stmt, msg) CAF_LOGMF_IF(stmt, CAF_TRACE, msg)
#define CAF_LOGF_ERROR(msg) CAF_LOGF(CAF_ERROR, msg)
#define CAF_LOGF_WARNING(msg) CAF_LOGF(CAF_WARNING, msg)
#define CAF_LOGF_DEBUG(msg) CAF_LOGF(CAF_DEBUG, msg)
#define CAF_LOGF_INFO(msg) CAF_LOGF(CAF_INFO, msg)
#define CAF_LOGF_TRACE(msg) CAF_LOGF(CAF_TRACE, msg)
#define CAF_LOGF_ERROR_IF(stmt, msg) CAF_LOGF_IF(stmt, CAF_ERROR, msg)
#define CAF_LOGF_WARNING_IF(stmt, msg) CAF_LOGF_IF(stmt, CAF_WARNING, msg)
#define CAF_LOGF_DEBUG_IF(stmt, msg) CAF_LOGF_IF(stmt, CAF_DEBUG, msg)
#define CAF_LOGF_INFO_IF(stmt, msg) CAF_LOGF_IF(stmt, CAF_INFO, msg)
#define CAF_LOGF_TRACE_IF(stmt, msg) CAF_LOGF_IF(stmt, CAF_TRACE, msg)
#endif // CAF_LOGGING_HPP
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