| author |  Ali Chraghi <alichraghi@proton.me> 2025-02-12 17:56:37+03:30 |
| committer |  Alex Rønne Petersen <alex@alexrp.com> 2025-02-13 16:55:58+01:00 |
| log | bffbc918ee2b349923ca2e7b9b5c8ff8fa1d0cd0 |
| tree | 3242d7c4ebd58f3621ea2e7153f91cad5d2c92a7 |
| parent | d12123a88cf56428874b359cb63acb8618dfbcfd |
std.time: more precise `nanoTimestamp` in windows
4 files changed, 7 insertions(+), 28 deletions(-)
lib- std
lib/std/os/windows/kernel32.zig-5
| ... | ... | @@ -656,9 +656,4 @@ pub extern "kernel32" fn SetLastError( |
| 656 | 656 | |
| 657 | 657 | // Everything Else |
| 658 | 658 | |
| 659 | // TODO: | |
| 660 | // Wrapper around KUSER_SHARED_DATA.SystemTime. | |
| 661 | // Much better to use NtQuerySystemTime or NtQuerySystemTimePrecise for guaranteed 0.1ns precision. | |
| 662 | pub extern "kernel32" fn GetSystemTimeAsFileTime(lpSystemTimeAsFileTime: *FILETIME) callconv(.winapi) void; | |
| 663 | ||
| 664 | 659 | pub extern "kernel32" fn GetSystemInfo(lpSystemInfo: *SYSTEM_INFO) callconv(.winapi) void; |
lib/std/os/windows/ntdll.zig+1
| ... | ... | @@ -92,6 +92,7 @@ pub extern "ntdll" fn RtlVirtualUnwind( |
| 92 | 92 | EstablisherFrame: *DWORD64, |
| 93 | 93 | ContextPointers: ?*KNONVOLATILE_CONTEXT_POINTERS, |
| 94 | 94 | ) callconv(.winapi) *EXCEPTION_ROUTINE; |
| 95 | pub extern "ntdll" fn RtlGetSystemTimePrecise() callconv(.winapi) LARGE_INTEGER; | |
| 95 | 96 | pub extern "ntdll" fn NtQueryInformationFile( |
| 96 | 97 | FileHandle: HANDLE, |
| 97 | 98 | IoStatusBlock: *IO_STATUS_BLOCK, |
lib/std/posix.zig+4-18
| ... | ... | @@ -5693,7 +5693,10 @@ pub const ClockGetTimeError = error{UnsupportedClock} || UnexpectedError; |
| 5693 | 5693 | |
| 5694 | 5694 | pub fn clock_gettime(clock_id: clockid_t) ClockGetTimeError!timespec { |
| 5695 | 5695 | var tp: timespec = undefined; |
| 5696 | if (native_os == .wasi and !builtin.link_libc) { | |
| 5696 | ||
| 5697 | if (native_os == .windows) { | |
| 5698 | @compileError("Windows does not support POSIX; use Windows-specific API or cross-platform std.time API"); | |
| 5699 | } else if (native_os == .wasi and !builtin.link_libc) { | |
| 5697 | 5700 | var ts: timestamp_t = undefined; |
| 5698 | 5701 | switch (system.clock_time_get(clock_id, 1, &ts)) { |
| 5699 | 5702 | .SUCCESS => { |
| ... | ... | @@ -5707,23 +5710,6 @@ pub fn clock_gettime(clock_id: clockid_t) ClockGetTimeError!timespec { |
| 5707 | 5710 | } |
| 5708 | 5711 | return tp; |
| 5709 | 5712 | } |
| 5710 | if (native_os == .windows) { | |
| 5711 | if (clock_id == .REALTIME) { | |
| 5712 | var ft: windows.FILETIME = undefined; | |
| 5713 | windows.kernel32.GetSystemTimeAsFileTime(&ft); | |
| 5714 | // FileTime has a granularity of 100 nanoseconds and uses the NTFS/Windows epoch. | |
| 5715 | const ft64 = (@as(u64, ft.dwHighDateTime) << 32) | ft.dwLowDateTime; | |
| 5716 | const ft_per_s = std.time.ns_per_s / 100; | |
| 5717 | tp = .{ | |
| 5718 | .sec = @as(i64, @intCast(ft64 / ft_per_s)) + std.time.epoch.windows, | |
| 5719 | .nsec = @as(c_long, @intCast(ft64 % ft_per_s)) * 100, | |
| 5720 | }; | |
| 5721 | return tp; | |
| 5722 | } else { | |
| 5723 | // TODO POSIX implementation of CLOCK.MONOTONIC on Windows. | |
| 5724 | return error.UnsupportedClock; | |
| 5725 | } | |
| 5726 | } | |
| 5727 | 5713 | |
| 5728 | 5714 | switch (errno(system.clock_gettime(clock_id, &tp))) { |
| 5729 | 5715 | .SUCCESS => return tp, |
lib/std/time.zig+2-5
| ... | ... | @@ -47,13 +47,10 @@ pub fn microTimestamp() i64 { |
| 47 | 47 | pub fn nanoTimestamp() i128 { |
| 48 | 48 | switch (builtin.os.tag) { |
| 49 | 49 | .windows => { |
| 50 | // FileTime has a granularity of 100 nanoseconds and uses the NTFS/Windows epoch, | |
| 50 | // RtlGetSystemTimePrecise() has a granularity of 100 nanoseconds and uses the NTFS/Windows epoch, | |
| 51 | 51 | // which is 1601-01-01. |
| 52 | 52 | const epoch_adj = epoch.windows * (ns_per_s / 100); |
| 53 | var ft: windows.FILETIME = undefined; | |
| 54 | windows.kernel32.GetSystemTimeAsFileTime(&ft); | |
| 55 | const ft64 = (@as(u64, ft.dwHighDateTime) << 32) | ft.dwLowDateTime; | |
| 56 | return @as(i128, @as(i64, @bitCast(ft64)) + epoch_adj) * 100; | |
| 53 | return @as(i128, windows.ntdll.RtlGetSystemTimePrecise() + epoch_adj) * 100; | |
| 57 | 54 | }, |
| 58 | 55 | .wasi => { |
| 59 | 56 | var ns: std.os.wasi.timestamp_t = undefined; |