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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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4
include/c11log/details/fast_oss.h
View File

@@ -15,7 +15,7 @@ public:
_str = other._str;
return *this;
}
const std::string& str_ref() const {
return _str;
}
@@ -53,7 +53,7 @@ public:
_dev = other._dev;
return *this;
}
const std::string& str_ref() const {
return _dev.str_ref();
}

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);
}

27
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);
dest.write(buff, size);
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));
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;
}