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ant/src/modules/performance.c
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performance.c
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#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#else
#include <sys/time.h>
#endif
#include "ant.h"
#include "runtime.h"
#include "modules/symbol.h"
#include "modules/performance.h"
static double time_origin_ms = 0;
static double get_current_time_ms(void) {
#ifdef _WIN32
LARGE_INTEGER freq, count;
QueryPerformanceFrequency(&freq);
QueryPerformanceCounter(&count);
return (double)count.QuadPart * 1000.0 / (double)freq.QuadPart;
#else
struct timeval tv;
gettimeofday(&tv, NULL);
return (double)tv.tv_sec * 1000.0 + (double)tv.tv_usec / 1000.0;
#endif
}
// performance.now()
static ant_value_t js_performance_now(ant_t *js, ant_value_t *args, int nargs) {
(void) args; (void) nargs;
double now = get_current_time_ms() - time_origin_ms;
return js_mknum(now);
}
// performance.timeOrigin
static ant_value_t js_performance_time_origin(ant_t *js, ant_value_t *args, int nargs) {
(void) args; (void) nargs;
return js_mknum(time_origin_ms);
}
ant_value_t perf_hooks_library(ant_t *js) {
ant_value_t lib = js_mkobj(js);
js_set(js, lib, "performance", js_get(js, js_glob(js), "performance"));
js_set_sym(js, lib, get_toStringTag_sym(), ANT_STRING("perf_hooks"));
return lib;
}
void init_performance_module() {
ant_t *js = rt->js;
ant_value_t glob = js_glob(js);
ant_value_t perf_obj = js_mkobj(js);
time_origin_ms = get_current_time_ms();
js_set(js, perf_obj, "now", js_mkfun(js_performance_now));
js_set(js, perf_obj, "timeOrigin", js_mknum(time_origin_ms));
js_set_sym(js, perf_obj, get_toStringTag_sym(), ANT_STRING("Performance"));
js_set(js, glob, "performance", perf_obj);
}

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