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typedef struct TimeStamp {
u64 start;
u64 finish;
String label;
} TimeStamp;
typedef struct Timings {
TimeStamp total;
Array(TimeStamp) sections;
u64 freq;
} Timings;
#if defined(GB_SYSTEM_WINDOWS)
u64 win32_time_stamp_time_now(void) {
LARGE_INTEGER counter;
QueryPerformanceCounter(&counter);
return counter.QuadPart;
}
u64 win32_time_stamp__freq(void) {
gb_local_persist LARGE_INTEGER win32_perf_count_freq = {0};
if (!win32_perf_count_freq.QuadPart) {
QueryPerformanceFrequency(&win32_perf_count_freq);
GB_ASSERT(win32_perf_count_freq.QuadPart != 0);
}
return win32_perf_count_freq.QuadPart;
}
#elif defined(GB_SYSTEM_OSX) || defined(GB_SYSTEM_UNIX)
#include <time.h>
u64 unix_time_stamp_time_now(void) {
struct timespec ts;
clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &ts);
return (ts.tv_sec * 1000000000) + ts.tv_nsec;
}
u64 unix_time_stamp__freq(void) {
gb_local_persist u64 freq = 0;
if (freq == 0) {
struct timespec ts;
clock_getres(CLOCK_PROCESS_CPUTIME_ID, &ts);
// that would be an absurd resolution (or lack thereof)
GB_ASSERT(ts.tv_sec == 0);
freq = cast(u64) ((1.0 / ts.tv_nsec) * 1000000000.0);
GB_ASSERT(freq != 0);
}
return freq;
}
#else
#error Implement system
#endif
u64 time_stamp_time_now(void) {
#if defined(GB_SYSTEM_WINDOWS)
return win32_time_stamp_time_now();
#elif defined(GB_SYSTEM_OSX) || defined(GB_SYSTEM_UNIX)
return unix_time_stamp_time_now();
#else
#error time_stamp_time_now
#endif
}
u64 time_stamp__freq(void) {
#if defined(GB_SYSTEM_WINDOWS)
return win32_time_stamp__freq();
#elif defined(GB_SYSTEM_OSX) || defined(GB_SYSTEM_UNIX)
return unix_time_stamp__freq();
#else
#error time_stamp__freq
#endif
}
TimeStamp make_time_stamp(String label) {
TimeStamp ts = {0};
ts.start = time_stamp_time_now();
ts.label = label;
return ts;
}
void timings_init(Timings *t, String label, isize buffer_size) {
array_init_reserve(&t->sections, heap_allocator(), buffer_size);
t->total = make_time_stamp(label);
t->freq = time_stamp__freq();
}
void timings_destroy(Timings *t) {
array_free(&t->sections);
}
void timings__stop_current_section(Timings *t) {
if (t->sections.count > 0) {
t->sections.e[t->sections.count-1].finish = time_stamp_time_now();
}
}
void timings_start_section(Timings *t, String label) {
timings__stop_current_section(t);
array_add(&t->sections, make_time_stamp(label));
}
f64 time_stamp_as_ms(TimeStamp ts, u64 freq) {
GB_ASSERT_MSG(ts.finish >= ts.start, "time_stamp_as_ms - %.*s", LIT(ts.label));
return 1000.0 * cast(f64)(ts.finish - ts.start) / cast(f64)freq;
}
void timings_print_all(Timings *t) {
char const SPACES[] = " ";
isize max_len, i;
timings__stop_current_section(t);
t->total.finish = time_stamp_time_now();
max_len = t->total.label.len;
for_array(i, t->sections) {
TimeStamp ts = t->sections.e[i];
max_len = gb_max(max_len, ts.label.len);
}
GB_ASSERT(max_len <= gb_size_of(SPACES)-1);
gb_printf("%.*s%.*s - %.3f ms\n",
LIT(t->total.label),
cast(int)(max_len-t->total.label.len), SPACES,
time_stamp_as_ms(t->total, t->freq));
for_array(i, t->sections) {
TimeStamp ts = t->sections.e[i];
gb_printf("%.*s%.*s - %.3f ms\n",
LIT(ts.label),
cast(int)(max_len-ts.label.len), SPACES,
time_stamp_as_ms(ts, t->freq));
}
}
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