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common: Reduce latency into function get_asctime #63

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common: Reduce latency into function get_asctime #63

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19 changes: 15 additions & 4 deletions fastwsgi/common.c
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Original file line number Diff line number Diff line change
@@ -1,6 +1,9 @@
#include "common.h"
#include "llhttp.h"
#include <time.h>
#ifdef _WIN32
#include <windows.h>
#endif

void logrepr(int level, PyObject* obj)
{
Expand Down Expand Up @@ -72,17 +75,25 @@ const char * get_obj_attr_str(PyObject * obj, const char * name)
static const char weekDays[7][4] = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };
static const char monthList[12][4] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };

time_t g_actual_time = 0;
uint32_t g_actual_time = 0;
char g_actual_asctime[32] = { 0 };
int g_actual_asctime_len = 0;

int get_asctime(char ** asc_time)
{
time_t curr_time = time(NULL);
if (curr_time == g_actual_time) {
uint32_t curr_ticks;
#ifdef _WIN32
curr_ticks = GetTickCount() / 1000;
#else
struct timespec ts;
clock_gettime(CLOCK_MONOTONIC, &ts);
curr_ticks = (uint32_t)ts.tv_sec;
#endif
if (curr_ticks == g_actual_time && g_actual_asctime_len) {
*asc_time = g_actual_asctime;
return g_actual_asctime_len;
}
time_t curr_time = time(NULL);
struct tm tv;
#ifdef _WIN32
gmtime_s(&tv, &curr_time);
Expand All @@ -94,7 +105,7 @@ int get_asctime(char ** asc_time)
weekDays[tv.tm_wday], tv.tm_mday, monthList[tv.tm_mon],
1900 + tv.tm_year, tv.tm_hour, tv.tm_min, tv.tm_sec);
if (len > 0 && len < 32) {
g_actual_time = curr_time;
g_actual_time = curr_ticks;
g_actual_asctime_len = len;
memcpy(g_actual_asctime, buf, 32);
*asc_time = g_actual_asctime;
Expand Down