68 lines
1.5 KiB
C++
68 lines
1.5 KiB
C++
#pragma once
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// log utility
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//
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// created on 2022-11-30
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//
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#include "referer.h"
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#include <string>
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#include <memory>
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#define SIZE_KB(n) (n) * 1024
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#define SIZE_MB(n) SIZE_KB((n) * 1024)
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#define SIZE_GB(n) SIZE_MB((n) * 1024)
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// object event
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//
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enum log_level
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{
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LOG_LEVEL_ALL = 0,
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LOG_LEVEL_DEBUG,
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LOG_LEVEL_WARNING,
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LOG_LEVEL_FATAL,
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};
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class log_cls
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{
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std::string file_;
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int32_t max_size_;
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log_level level_;
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MUTEX lock_;
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FILE *dst_;
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static log_cls* inst_;
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void create_log_file(void);
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protected:
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log_cls(const char* path_file, log_level level, int32_t max_size);
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~log_cls();
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void log_internal(const char* txt);
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public:
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static void initialize(const char* path_file, log_level level = LOG_LEVEL_ALL, int32_t max_size = SIZE_MB(10));
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template<typename ... Args>
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static void log(log_level level, const char* fmt, Args ... args)
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{
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if (level >= log_cls::get_log_level() && log_cls::inst_)
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{
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size_t size = snprintf(nullptr, 0, fmt, args ...) + 1;
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std::unique_ptr<char[]> buf(new char[size]);
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snprintf(buf.get(), size, fmt, args ...);
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log_cls::inst_->log_internal(buf.get());
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}
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}
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static int32_t log_when_err(int32_t err, const char* oper_desc, log_level level = LOG_LEVEL_WARNING); // log as: oper_desc = strerror(errno)\n. return real error number errno
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static log_level get_log_level(void);
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static std::string get_log_file(void);
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};
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