asyncbuffer.h

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
#ifndef LOG4CXX_ASYNC_BUFFER_H
#define LOG4CXX_ASYNC_BUFFER_H
 
#include <log4cxx/helpers/messagebuffer.h>
#include <functional>
#include <vector>
#if LOG4CXX_ASYNC_BUFFER_SUPPORTS_FMT
#include <fmt/args.h>
#if LOG4CXX_WCHAR_T_API || LOG4CXX_LOGCHAR_IS_WCHAR
#include <fmt/xchar.h>
#endif // LOG4CXX_WCHAR_T_API || LOG4CXX_LOGCHAR_IS_WCHAR
#endif // LOG4CXX_ASYNC_BUFFER_SUPPORTS_FMT
 
#if defined(__cpp_concepts) && 202002 <= __cpp_concepts && defined(__GNUC__) && __GNUC__ <= 12
// GCC 12 has broken concepts
#define LOG4CXX_CONCEPTS 0
#elif defined(__cpp_concepts) && 202002 <= __cpp_concepts
#define LOG4CXX_CONCEPTS 1
#else
#define LOG4CXX_CONCEPTS 0
#endif
 
#if LOG4CXX_CONCEPTS
#include <concepts>
#endif
 
namespace LOG4CXX_NS
{
 
namespace helpers
{
 
class LOG4CXX_EXPORT AsyncBuffer
{
public: // ...structors
    AsyncBuffer();
 
    AsyncBuffer(AsyncBuffer&& other);
 
    ~AsyncBuffer();
 
public: // Operators
    template <typename T>
    AsyncBuffer& operator<<(const T& value)
    {
#if LOG4CXX_CONCEPTS
#if LOG4CXX_LOGCHAR_IS_UTF8
        if constexpr (requires(std::ostream& buf, T v) { buf << v; })
        {
            append([value](CharMessageBuffer& msgBuf)
                {
                    msgBuf << value;
                });
        }
#if LOG4CXX_WCHAR_T_API
        else if constexpr (requires(std::wostream& buf, T v) { buf << v; })
        {
            append([value](WideMessageBuffer& msgBuf)
                {
                    msgBuf << value;
                });
        }
#endif // LOG4CXX_WCHAR_T_API
        else
            static_assert(false, "operator<<(std::ostream&) overload must be provided");
#else // !LOG4CXX_LOGCHAR_IS_UTF8
        if constexpr (requires(std::wostream& buf, T v) { buf << v; })
        {
            append([value](WideMessageBuffer& msgBuf)
                {
                    msgBuf << value;
                });
        }
        else if constexpr (requires(std::ostream& buf, T v) { buf << v; })
        {
            append([value](CharMessageBuffer& msgBuf)
                {
                    msgBuf << value;
                });
        }
        else
            static_assert(false, "operator<<(std::wostream&) overload must be provided");
#endif // !LOG4CXX_LOGCHAR_IS_UTF8
#else // !LOG4CXX_CONCEPTS
        append([value](LogCharMessageBuffer& msgBuf)
            {
                msgBuf << value;
            });
#endif // !LOG4CXX_CONCEPTS
        return *this;
    }
 
#ifdef __cpp_init_captures // C++ >= 14
    template <typename T>
    AsyncBuffer& operator<<(const T&& rvalue)
    {
#if LOG4CXX_CONCEPTS
#if LOG4CXX_LOGCHAR_IS_UTF8
        if constexpr (requires(std::ostream& buf, T v) { buf << v; })
        {
            append([value = std::move(rvalue)](CharMessageBuffer& msgBuf)
                {
                    msgBuf << value;
                });
        }
#if LOG4CXX_WCHAR_T_API
        else if constexpr (requires(std::wostream& buf, T v) { buf << v; })
        {
            append([value = std::move(rvalue)](WideMessageBuffer& msgBuf)
                {
                    msgBuf << value;
                });
        }
#endif // LOG4CXX_WCHAR_T_API
        else
            static_assert(false, "operator<<(std::ostream&) overload must be provided");
#else // !LOG4CXX_LOGCHAR_IS_UTF8
        if constexpr (requires(std::wostream& buf, T v) { buf << v; })
        {
            append([value = std::move(rvalue)](WideMessageBuffer& msgBuf)
                {
                    msgBuf << value;
                });
        }
        else if constexpr (requires(std::ostream& buf, T v) { buf << v; })
        {
            append([value = std::move(rvalue)](CharMessageBuffer& msgBuf)
                {
                    msgBuf << value;
                });
        }
        else
            static_assert(false, "operator<<(std::wostream&) overload must be provided");
#endif // !LOG4CXX_LOGCHAR_IS_UTF8
#else // !LOG4CXX_CONCEPTS
        append([value = std::move(rvalue)](LogCharMessageBuffer& msgBuf)
            {
                msgBuf << value;
            });
#endif // !LOG4CXX_CONCEPTS
        return *this;
    }
 
#endif // __cpp_init_captures
 
public: // Accessors
    bool empty() const;
 
    void renderMessage(LogCharMessageBuffer& msg) const;
 
public: // Modifiers
    void clear();
 
#if LOG4CXX_ASYNC_BUFFER_SUPPORTS_FMT
    using StringViewType = fmt::basic_string_view<char>;
    using FmtArgStore    = fmt::dynamic_format_arg_store<fmt::format_context>;
    template <typename... Args>
    void setMessage(fmt::format_string<Args...> fmt_str, Args&&... args)
    {
        auto store = FmtArgStore();
        ( store.push_back(std::forward<Args>(args)), ...);
        initializeForFmt(std::move(fmt_str), std::move(store));
    }
 
#if LOG4CXX_WCHAR_T_API || LOG4CXX_LOGCHAR_IS_WCHAR
    using WideStringViewType = fmt::basic_string_view<wchar_t>;
    using WideFmtArgStore    = fmt::dynamic_format_arg_store<fmt::wformat_context>;
    template <typename... Args>
    void setMessage(fmt::wformat_string<Args...> fmt_str, Args&&... args)
    {
        auto store = WideFmtArgStore();
        ( store.push_back(std::forward<Args>(args)), ...);
        initializeForFmt(std::move(fmt_str), std::move(store));
    }
#endif // LOG4CXX_WCHAR_T_API || LOG4CXX_LOGCHAR_IS_WCHAR
#endif // LOG4CXX_ASYNC_BUFFER_SUPPORTS_FMT
 
private:
    AsyncBuffer(const AsyncBuffer&) = delete;
    AsyncBuffer& operator=(const AsyncBuffer&) = delete;
 
    LOG4CXX_DECLARE_PRIVATE_MEMBER_PTR(Private, m_priv)
#if LOG4CXX_CONCEPTS
    using MessageBufferAppender = std::function<void(CharMessageBuffer&)>;
 
    void append(MessageBufferAppender&& f);
 
#if LOG4CXX_WCHAR_T_API
    using WideMessageBufferAppender = std::function<void(WideMessageBuffer&)>;
 
    void append(WideMessageBufferAppender&& f);
#endif // LOG4CXX_WCHAR_T_API
#else // !LOG4CXX_CONCEPTS
    using MessageBufferAppender = std::function<void(LogCharMessageBuffer&)>;
 
    void append(MessageBufferAppender&& f);
#endif // !LOG4CXX_CONCEPTS
 
#if LOG4CXX_ASYNC_BUFFER_SUPPORTS_FMT
    void initializeForFmt(StringViewType&& format_string, FmtArgStore&& args);
 
#if LOG4CXX_WCHAR_T_API || LOG4CXX_LOGCHAR_IS_WCHAR
    void initializeForFmt(WideStringViewType&& format_string, WideFmtArgStore&& args);
#endif // LOG4CXX_WCHAR_T_API || LOG4CXX_LOGCHAR_IS_WCHAR
#endif // LOG4CXX_ASYNC_BUFFER_SUPPORTS_FMT
};
 
} // namespace helpers
} // namespace LOG4CXX_NS
 
#if !defined(LOG4CXX_THRESHOLD) || LOG4CXX_THRESHOLD <= 10000
#define LOG4CXX_DEBUG_ASYNC(logger, message) do { \
        if (LOG4CXX_UNLIKELY(::LOG4CXX_NS::Logger::isDebugEnabledFor(logger))) {\
            ::LOG4CXX_NS::helpers::AsyncBuffer buf; \
            logger->addDebugEvent(std::move(buf << message), LOG4CXX_LOCATION); }} while (0)
 
#if LOG4CXX_ASYNC_BUFFER_SUPPORTS_FMT
#define LOG4CXX_DEBUG_FMT_ASYNC(logger, fmt, ...) do { \
        if (LOG4CXX_UNLIKELY(::LOG4CXX_NS::Logger::isDebugEnabledFor(logger))) {\
            ::LOG4CXX_NS::helpers::AsyncBuffer buf;\
            buf.setMessage(fmt LOG4CXX_FMT_VA_ARG(__VA_ARGS__));\
            logger->addDebugEvent(std::move(buf), LOG4CXX_LOCATION); }} while (0)
#endif // LOG4CXX_ASYNC_BUFFER_SUPPORTS_FMT
#else
#define LOG4CXX_DEBUG_ASYNC(logger, message)
#define LOG4CXX_DEBUG_FMT_ASYNC(logger, message)
#endif
 
#if !defined(LOG4CXX_THRESHOLD) || LOG4CXX_THRESHOLD <= 5000
#define LOG4CXX_TRACE_ASYNC(logger, message) do { \
        if (LOG4CXX_UNLIKELY(::LOG4CXX_NS::Logger::isTraceEnabledFor(logger))) {\
            ::LOG4CXX_NS::helpers::AsyncBuffer buf; \
            logger->addTraceEvent(std::move(buf << message), LOG4CXX_LOCATION); }} while (0)
 
#if LOG4CXX_ASYNC_BUFFER_SUPPORTS_FMT
#define LOG4CXX_TRACE_FMT_ASYNC(logger, fmt, ...) do { \
        if (LOG4CXX_UNLIKELY(::LOG4CXX_NS::Logger::isTraceEnabledFor(logger))) {\
            ::LOG4CXX_NS::helpers::AsyncBuffer buf;\
            buf.setMessage(fmt LOG4CXX_FMT_VA_ARG(__VA_ARGS__));\
            logger->addTraceEvent(std::move(buf), LOG4CXX_LOCATION); }} while (0)
#endif // LOG4CXX_ASYNC_BUFFER_SUPPORTS_FMT
 
#else
#define LOG4CXX_TRACE_ASYNC(logger, message)
#define LOG4CXX_TRACE_FMT_ASYNC(logger, message)
#endif
 
#if !defined(LOG4CXX_THRESHOLD) || LOG4CXX_THRESHOLD <= 20000
#define LOG4CXX_INFO_ASYNC(logger, message) do { \
        if (::LOG4CXX_NS::Logger::isInfoEnabledFor(logger)) {\
            ::LOG4CXX_NS::helpers::AsyncBuffer buf;\
            logger->addInfoEvent(std::move(buf << message), LOG4CXX_LOCATION);\
        }} while (0)
 
#endif
 
#if LOG4CXX_ASYNC_BUFFER_SUPPORTS_FMT
#define LOG4CXX_INFO_FMT_ASYNC(logger, fmt, ...) do { \
        if (::LOG4CXX_NS::Logger::isInfoEnabledFor(logger)) {\
            ::LOG4CXX_NS::helpers::AsyncBuffer buf;\
            buf.setMessage(fmt LOG4CXX_FMT_VA_ARG(__VA_ARGS__));\
            logger->addInfoEvent(std::move(buf), LOG4CXX_LOCATION); }} while (0)
#endif // LOG4CXX_ASYNC_BUFFER_SUPPORTS_FMT
 
#else
#define LOG4CXX_INFO_ASYNC(logger, message)
#define LOG4CXX_INFO_FMT_ASYNC(logger, message)
#endif
 
#if !defined(LOG4CXX_THRESHOLD) || LOG4CXX_THRESHOLD <= 30000
#define LOG4CXX_WARN_ASYNC(logger, message) do { \
        if (::LOG4CXX_NS::Logger::isWarnEnabledFor(logger)) {\
            ::LOG4CXX_NS::helpers::AsyncBuffer buf; \
            logger->addWarnEvent(std::move(buf << message), LOG4CXX_LOCATION); }} while (0)
 
#if LOG4CXX_ASYNC_BUFFER_SUPPORTS_FMT
#define LOG4CXX_WARN_FMT_ASYNC(logger, fmt, ...) do { \
        if (::LOG4CXX_NS::Logger::isWarnEnabledFor(logger)) {\
            ::LOG4CXX_NS::helpers::AsyncBuffer buf;\
            buf.setMessage(fmt LOG4CXX_FMT_VA_ARG(__VA_ARGS__));\
            logger->addWarnEvent(std::move(buf), LOG4CXX_LOCATION); }} while (0)
#endif // LOG4CXX_ASYNC_BUFFER_SUPPORTS_FMT
 
#else
#define LOG4CXX_WARN_ASYNC(logger, message)
#define LOG4CXX_WARN_FMT_ASYNC(logger, message)
#endif
 
#if !defined(LOG4CXX_THRESHOLD) || LOG4CXX_THRESHOLD <= 40000
#define LOG4CXX_ERROR_ASYNC(logger, message) do { \
        if (::LOG4CXX_NS::Logger::isErrorEnabledFor(logger)) {\
            ::LOG4CXX_NS::helpers::AsyncBuffer buf; \
            logger->addErrorEvent(std::move(buf << message), LOG4CXX_LOCATION); }} while (0)
 
#if LOG4CXX_ASYNC_BUFFER_SUPPORTS_FMT
#define LOG4CXX_ERROR_FMT_ASYNC(logger, fmt, ...) do { \
        if (::LOG4CXX_NS::Logger::isErrorEnabledFor(logger)) {\
            ::LOG4CXX_NS::helpers::AsyncBuffer buf;\
            buf.setMessage(fmt LOG4CXX_FMT_VA_ARG(__VA_ARGS__));\
            logger->addErrorEvent(std::move(buf), LOG4CXX_LOCATION); }} while (0)
#endif // LOG4CXX_ASYNC_BUFFER_SUPPORTS_FMT
 
#define LOG4CXX_ASSERT_ASYNC(logger, condition, message) do { \
        if (!(condition) && ::LOG4CXX_NS::Logger::isErrorEnabledFor(logger)) {\
            ::LOG4CXX_NS::helpers::AsyncBuffer buf; \
            LOG4CXX_STACKTRACE \
            logger->addErrorEvent(std::move(buf << message), LOG4CXX_LOCATION); }} while (0)
 
#if LOG4CXX_ASYNC_BUFFER_SUPPORTS_FMT
#define LOG4CXX_ASSERT_FMT_ASYNC(logger, condition, fmt, ...) do { \
        if (!(condition) && ::LOG4CXX_NS::Logger::isErrorEnabledFor(logger)) {\
            LOG4CXX_STACKTRACE \
            ::LOG4CXX_NS::helpers::AsyncBuffer buf;\
            buf.setMessage(fmt LOG4CXX_FMT_VA_ARG(__VA_ARGS__));\
            logger->addErrorEvent(std::move(buf), LOG4CXX_LOCATION); }} while (0)
#endif // LOG4CXX_ASYNC_BUFFER_SUPPORTS_FMT
 
#else
#define LOG4CXX_ERROR_ASYNC(logger, message)
#define LOG4CXX_ERROR_FMT_ASYNC(logger, message)
#define LOG4CXX_ASSERT_ASYNC(logger, condition, message)
#define LOG4CXX_ASSERT_FMT_ASYNC(logger, condition, message)
#endif
 
#if !defined(LOG4CXX_THRESHOLD) || LOG4CXX_THRESHOLD <= 50000
#define LOG4CXX_FATAL_ASYNC(logger, message) do { \
        if (::LOG4CXX_NS::Logger::isFatalEnabledFor(logger)) {\
            ::LOG4CXX_NS::helpers::AsyncBuffer buf; \
            logger->addFatalEvent(std::move(buf << message), LOG4CXX_LOCATION); }} while (0)
 
#if LOG4CXX_ASYNC_BUFFER_SUPPORTS_FMT
#define LOG4CXX_FATAL_FMT_ASYNC(logger, fmt, ...) do { \
        if (::LOG4CXX_NS::Logger::isFatalEnabledFor(logger)) {\
            ::LOG4CXX_NS::helpers::AsyncBuffer buf;\
            buf.setMessage(fmt LOG4CXX_FMT_VA_ARG(__VA_ARGS__));\
            logger->addFatalEvent(std::move(buf), LOG4CXX_LOCATION); }} while (0)
#endif // LOG4CXX_ASYNC_BUFFER_SUPPORTS_FMT
 
#else
#define LOG4CXX_FATAL_ASYNC(logger, message)
#define LOG4CXX_FATAL_FMT_ASYNC(logger, message)
#endif