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store sys timer start in qpc

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jacob 2025-01-30 08:49:08 -06:00
parent 79cc9e15e5
commit 489fc8eca3
1 changed files with 13 additions and 13 deletions
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26
src/sys_win32.c
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@ -98,9 +98,9 @@ struct win32_window {
GLOBAL struct { GLOBAL struct {
SYSTEM_INFO info; SYSTEM_INFO info;
i64 timer_frequency_s; i64 timer_start_qpc;
i64 timer_frequency_ns; i64 timer_qpc_frequency;
i64 timer_start_ns; i64 ns_per_qpc;
i32 scheduler_period_ms; i32 scheduler_period_ms;
DWORD thread_tls_index; DWORD thread_tls_index;
u32 main_thread_id; u32 main_thread_id;
@ -136,20 +136,20 @@ GLOBAL struct {
* Events * Events
* ========================== */ * ========================== */
/* https://git.rfleury.com/community/root_basic/src/commit/9b49fcd24e0c3f875b7c213e81a219bf8544bddb/code/os/gfx/win32/os_gfx_win32.c#L193 */
INTERNAL void win32_init_vk_btn_table(void) INTERNAL void win32_init_vk_btn_table(void)
{ {
MEMZERO_ARRAY(G.vk_btn_table); MEMZERO_ARRAY(G.vk_btn_table);
for (u32 i = 'A', j = SYS_BTN_A; i <= 'Z'; i += 1, j += 1) { for (u32 i = 'A', j = SYS_BTN_A; i <= 'Z'; ++i, ++j) {
G.vk_btn_table[i] = (enum sys_btn)j; G.vk_btn_table[i] = (enum sys_btn)j;
} }
for (u32 i = '0', j = SYS_BTN_0; i <= '9'; i += 1, j += 1) { for (u32 i = '0', j = SYS_BTN_0; i <= '9'; ++i, ++j) {
G.vk_btn_table[i] = (enum sys_btn)j; G.vk_btn_table[i] = (enum sys_btn)j;
} }
for (u32 i = VK_F1, j = SYS_BTN_F1; i <= VK_F24; i += 1, j += 1) { for (u32 i = VK_F1, j = SYS_BTN_F1; i <= VK_F24; ++i, ++j) {
G.vk_btn_table[i] = (enum sys_btn)j; G.vk_btn_table[i] = (enum sys_btn)j;
} }
G.vk_btn_table[VK_ESCAPE] = SYS_BTN_ESC; G.vk_btn_table[VK_ESCAPE] = SYS_BTN_ESC;
G.vk_btn_table[VK_OEM_3] = SYS_BTN_GRAVE_ACCENT; G.vk_btn_table[VK_OEM_3] = SYS_BTN_GRAVE_ACCENT;
G.vk_btn_table[VK_OEM_MINUS] = SYS_BTN_MINUS; G.vk_btn_table[VK_OEM_MINUS] = SYS_BTN_MINUS;
@ -248,7 +248,7 @@ i64 sys_time_ns(void)
{ {
LARGE_INTEGER qpc; LARGE_INTEGER qpc;
QueryPerformanceCounter(&qpc); QueryPerformanceCounter(&qpc);
i64 res = (qpc.QuadPart * G.timer_frequency_ns) - G.timer_start_ns; i64 res = (qpc.QuadPart - G.timer_start_qpc) * G.ns_per_qpc;
return res; return res;
} }
@ -1931,7 +1931,7 @@ INTERNAL void win32_precise_sleep_timer(f64 seconds, HANDLE timer)
/* TODO: Does the high frequency timer even require setting / scaling of /* TODO: Does the high frequency timer even require setting / scaling of
* timeBeginPeriod/scheduler_period_ms? There isn't much documentation. */ * timeBeginPeriod/scheduler_period_ms? There isn't much documentation. */
i64 qpc_per_second = G.timer_frequency_s; i64 qpc_per_second = G.timer_qpc_frequency;
i32 scheduler_period_ms = G.scheduler_period_ms; i32 scheduler_period_ms = G.scheduler_period_ms;
LARGE_INTEGER qpc; LARGE_INTEGER qpc;
@ -1972,7 +1972,7 @@ INTERNAL void win32_precise_sleep_timer(f64 seconds, HANDLE timer)
INTERNAL void win32_precise_sleep_legacy(f64 seconds) INTERNAL void win32_precise_sleep_legacy(f64 seconds)
{ {
__prof; __prof;
i64 qpc_per_second = G.timer_frequency_s; i64 qpc_per_second = G.timer_qpc_frequency;
i32 scheduler_period_ms = G.scheduler_period_ms; i32 scheduler_period_ms = G.scheduler_period_ms;
LARGE_INTEGER qpc; LARGE_INTEGER qpc;
@ -2063,12 +2063,12 @@ int CALLBACK wWinMain(_In_ HINSTANCE instance, _In_opt_ HINSTANCE prev_instance,
LARGE_INTEGER qpf; LARGE_INTEGER qpf;
QueryPerformanceFrequency(&qpf); QueryPerformanceFrequency(&qpf);
G.timer_frequency_s = qpf.QuadPart; G.timer_qpc_frequency = qpf.QuadPart;
G.timer_frequency_ns = 1000000000 / qpf.QuadPart; G.ns_per_qpc = 1000000000 / qpf.QuadPart;
LARGE_INTEGER qpc; LARGE_INTEGER qpc;
QueryPerformanceCounter(&qpc); QueryPerformanceCounter(&qpc);
G.timer_start_ns = qpc.QuadPart * G.timer_frequency_ns; G.timer_start_qpc = qpc.QuadPart;
TIMECAPS caps; TIMECAPS caps;
timeGetDevCaps(&caps, sizeof(caps)); timeGetDevCaps(&caps, sizeof(caps));