#include <string.h>
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#include <time.h>
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#include <sys/time.h>
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#include <stdarg.h>
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#include "log.h"
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#include <pthread.h>
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using namespace std;
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Log::Log()
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{
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m_count = 0;
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m_is_async = false;
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}
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Log::~Log()
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{
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if (m_fp != NULL)
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{
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fclose(m_fp);
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}
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}
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//异步需要设置阻塞队列的长度，同步不需要设置
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bool Log::init(const char *file_name, int close_log, int log_buf_size, int split_lines, int max_queue_size)
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{
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//如果设置了max_queue_size,则设置为异步
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if (max_queue_size >= 1)
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{
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m_is_async = true;
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m_log_queue = new block_queue<string>(max_queue_size);
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pthread_t tid;
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//flush_log_thread为回调函数,这里表示创建线程异步写日志
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pthread_create(&tid, NULL, flush_log_thread, NULL);
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}
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m_close_log = close_log;
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m_log_buf_size = log_buf_size;
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m_buf = new char[m_log_buf_size];
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memset(m_buf, '\0', m_log_buf_size);
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m_split_lines = split_lines;
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time_t t = time(NULL);
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struct tm *sys_tm = localtime(&t);
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struct tm my_tm = *sys_tm;
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const char *p = strrchr(file_name, '/');
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char log_full_name[256] = {0};
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if (p == NULL)
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{
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snprintf(log_full_name, 255, "%d_%02d_%02d_%s", my_tm.tm_year + 1900, my_tm.tm_mon + 1, my_tm.tm_mday, file_name);
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}
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else
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{
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strcpy(log_name, p + 1);
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strncpy(dir_name, file_name, p - file_name + 1);
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snprintf(log_full_name, 255, "%s%d_%02d_%02d_%s", dir_name, my_tm.tm_year + 1900, my_tm.tm_mon + 1, my_tm.tm_mday, log_name);
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}
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m_today = my_tm.tm_mday;
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m_fp = fopen(log_full_name, "a");
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if (m_fp == NULL)
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{
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return false;
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}
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return true;
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}
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void Log::write_log(int level, const char *format, ...)
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{
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struct timeval now = {0, 0};
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gettimeofday(&now, NULL);
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time_t t = now.tv_sec;
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struct tm *sys_tm = localtime(&t);
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struct tm my_tm = *sys_tm;
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char s[16] = {0};
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switch (level)
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{
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case 0:
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strcpy(s, "[debug]:");
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break;
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case 1:
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strcpy(s, "[info]:");
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break;
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case 2:
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strcpy(s, "[warn]:");
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break;
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case 3:
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strcpy(s, "[erro]:");
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break;
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default:
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strcpy(s, "[info]:");
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break;
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}
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//写入一个log，对m_count++, m_split_lines最大行数
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m_mutex.lock();
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m_count++;
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if (m_today != my_tm.tm_mday || m_count % m_split_lines == 0) //everyday log
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{
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char new_log[256] = {0};
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fflush(m_fp);
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fclose(m_fp);
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char tail[16] = {0};
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snprintf(tail, 16, "%d_%02d_%02d_", my_tm.tm_year + 1900, my_tm.tm_mon + 1, my_tm.tm_mday);
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if (m_today != my_tm.tm_mday)
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{
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snprintf(new_log, 255, "%s%s%s", dir_name, tail, log_name);
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m_today = my_tm.tm_mday;
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m_count = 0;
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}
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else
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{
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snprintf(new_log, 255, "%s%s%s.%lld", dir_name, tail, log_name, m_count / m_split_lines);
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}
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m_fp = fopen(new_log, "a");
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}
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m_mutex.unlock();
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va_list valst;
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va_start(valst, format);
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string log_str;
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m_mutex.lock();
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//写入的具体时间内容格式
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int n = snprintf(m_buf, 48, "%d-%02d-%02d %02d:%02d:%02d.%06ld %s ",
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my_tm.tm_year + 1900, my_tm.tm_mon + 1, my_tm.tm_mday,
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my_tm.tm_hour, my_tm.tm_min, my_tm.tm_sec, now.tv_usec, s);
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int m = vsnprintf(m_buf + n, m_log_buf_size - n - 1, format, valst);
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m_buf[n + m] = '\n';
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m_buf[n + m + 1] = '\0';
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log_str = m_buf;
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m_mutex.unlock();
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if (m_is_async && !m_log_queue->full())
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{
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m_log_queue->push(log_str);
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}
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else
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{
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m_mutex.lock();
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fputs(log_str.c_str(), m_fp);
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m_mutex.unlock();
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}
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va_end(valst);
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}
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void Log::flush(void)
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{
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m_mutex.lock();
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//强制刷新写入流缓冲区
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fflush(m_fp);
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m_mutex.unlock();
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}
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