diff options
Diffstat (limited to 'src/core')
| -rw-r--r-- | src/core/src/loop.c | 45 |
1 files changed, 28 insertions, 17 deletions
diff --git a/src/core/src/loop.c b/src/core/src/loop.c index fa95723..13a2856 100644 --- a/src/core/src/loop.c +++ b/src/core/src/loop.c @@ -51,18 +51,29 @@ i32 nproc(void) { return get_nprocs(); } -void delay( uint64_t ns ) +void delay( uint64_t us ) { #if defined(_WIN32) || defined(__WIN32__) || defined(WIN32) Sleep( ms ); #else struct timespec ts = { - .tv_sec = ns / 1000000000, - .tv_nsec = ns + .tv_sec = us / 1000000, + .tv_nsec = (us * 1000) % 1000000000 }; struct timespec rem = {0,0}; - while(nanosleep(&ts, &rem)) { - WARN("nanosleep didn't sleep full duration!"); + int err = 0; + while((err = clock_nanosleep(CLOCK_MONOTONIC, 0, &ts, &rem))) { + switch (err) { + case EINTR: + WARN("clock_nanosleep didn't sleep full duration: interrupted."); + break; + case EINVAL: + WARN("clock_nanosleep didn't sleep full duration: invalid argument."); + break; + case ENOTSUP: + WARN("clock_nanosleep didn't sleep full duration: unsupported clock."); + break; + } ts = rem; rem = (struct timespec){0,0}; } @@ -310,15 +321,15 @@ i32 engine_run(Platform* p, StateType initial_state, void* state_arg) { u64 last_fps_measurement = frame_end; u64 last_fps_ticks = 0; - /* The target frametime measured in milliseconds */ - const u32 fps_cap = p->fps_target > 0 ? 1000000000 / p->fps_target : 0; + /* The target frametime measured in μs */ + const u32 fps_cap = p->fps_target > 0 ? 1000000 / p->fps_target : 0; /* Main loop */ do { - /* frame_start is milliseconds since engine was initialized */ + /* frame_start is μs since engine was initialized */ const u64 frame_start = get_time(); - /* dt measured in milliseconds */ + /* dt measured in μs */ const u64 dt = frame_start - frame_end; /* Delta is relative to FPS cap */ @@ -366,9 +377,9 @@ i32 engine_run(Platform* p, StateType initial_state, void* state_arg) { /* Regulate FPS */ u64 frame_end = get_time(); - const u64 fps_diff = fps_cap - frame_end - frame_start; + const u64 fps_diff = fps_cap - (frame_end - frame_start); - if (fps_cap >= (frame_end - frame_start)) { + if (fps_diff > 0) { delay(fps_diff); } @@ -376,17 +387,17 @@ i32 engine_run(Platform* p, StateType initial_state, void* state_arg) { const u64 dt_measurement = frame_end - last_fps_measurement; /* only make measurements once a second */ - if (dt_measurement > 1000000000) { + if (dt_measurement > 1000000) { printf(" FPS: %.1f" "\tticks: %lu" - "\tframetime: %.1fμs" - "\trendertime: %.1fμs" + "\tframetime: %luμs" + "\trendertime: %luμs" "\n" - , ((f64)(ticks - last_fps_ticks)) / (dt_measurement / 1000000000.0) + , ((f64)(ticks - last_fps_ticks)) / (dt_measurement / 1000000.0) , ticks - , dt / 1000.0 - , rendertime_dt / 1000.0 + , dt + , rendertime_dt ); last_fps_measurement = frame_end; |