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cache sprintf of time in default formatter

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gabime 2014-03-04 00:08:30 +02:00
parent 344b3d2834
commit 2be33c19fc
4 changed files with 45 additions and 20 deletions
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11
example/example.cpp
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@ -48,20 +48,26 @@ void testlog(int threads)
int main(int argc, char* argv[])
{
if(argc || argv){};
using namespace std::chrono;
using namespace c11log;
using namespace utils;
using std::cout;
using std::endl;
//auto fsink2 = std::make_shared<sinks::rotating_file_sink>("log", "txt", 1024*1024*50 , 5, seconds(1));
auto fsink = std::make_shared<sinks::rotating_file_sink>("log", "txt", 1024*1024*50 , 5, seconds(1));
auto &my_logger = get_logger("example");
auto null_sink = std::make_shared<sinks::null_sink>();
//auto async = std::make_shared<sinks::async_sink>(1000);
//async->add_sink(fsink);
my_logger.add_sink(null_sink);
auto start = system_clock::now();
const unsigned int howmany = 10000000;
for(unsigned int i = 0; i < howmany ; i++)
my_logger.info() << "Hello logger " << i;
//async->shutdown(seconds(3));
auto delta = system_clock::now() - start;
auto delta_d = duration_cast<duration<double>> (delta);
cout << "Total " << format(howmany) << endl;
@ -71,7 +77,7 @@ int main(int argc, char* argv[])
return 0;
/*
if(argc !=3) {
std::cerr << "Usage: " << argv[0] << " qsize, threads" << std::endl;
return 0;
@ -93,5 +99,6 @@ int main(int argc, char* argv[])
testlog(threads);
*/
}

21
include/c11log/details/os.h
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@ -32,7 +32,20 @@ inline std::tm c11log::details::os::localtime()
return localtime(now_t);
}
// Take care of snprintf in visual studio
#ifdef _MSC_VER
#define snprintf _snprintf
#endif
inline bool operator==(const std::tm& tm1, const std::tm& tm2)
{
return (tm1.tm_sec == tm2.tm_sec &&
tm1.tm_min == tm2.tm_min &&
tm1.tm_hour == tm2.tm_hour &&
tm1.tm_mday == tm2.tm_mday &&
tm1.tm_mon == tm2.tm_mon &&
tm1.tm_year == tm2.tm_year &&
tm1.tm_isdst == tm2.tm_isdst &&
tm1.tm_gmtoff == tm2.tm_gmtoff);
}
inline bool operator!=(const std::tm& tm1, const std::tm& tm2)
{
return !(tm1==tm2);
}

25
include/c11log/formatter.h
View File

@ -43,15 +43,20 @@ private:
inline void c11log::formatters::default_formatter::_format_time(const log_clock::time_point& tp, std::ostream &dest)
{
auto tm = details::os::localtime(log_clock::to_time_t(tp));
char buff[64];
int size = snprintf(buff, sizeof(buff), "[%d-%02d-%02d %02d:%02d:%02d]",
tm.tm_year + 1900,
tm.tm_mon + 1,
tm.tm_mday,
tm.tm_hour,
tm.tm_min,
tm.tm_sec);
static thread_local std::tm last_tm = {0,0,0,0,0,0,0,0,0,0,0};
static thread_local char last_time_str[64];
auto tm_now = details::os::localtime(log_clock::to_time_t(tp));
dest.write(buff, size);
if(last_tm != tm_now)
{
sprintf(last_time_str, "[%d-%02d-%02d %02d:%02d:%02d]",
tm_now.tm_year + 1900,
tm_now.tm_mon + 1,
tm_now.tm_mday,
tm_now.tm_hour,
tm_now.tm_min,
tm_now.tm_sec);
last_tm = tm_now;
}
dest << last_time_str;
}