zig

commit 890433e292da449e79c5a8c2efb91f65555da775 (tree)
parent cafce8c7670e90969b1bedae0efab3df583b11dd
Author: Alex Rønne Petersen <alex@alexrp.com>
Date:   Wed, 26 Jun 2024 02:48:03 +0200

std.os.linux: Define timespec as kernel_timespec (64-bit) for riscv32.

This is kind of a hack because the timespec in UAPI headers is actually still
32-bit while __kernel_timespec is 64-bit. But, importantly, all the syscalls
take __kernel_timespec from the get-go (because riscv32 support is so recent).

Defining our timespec this way will allow all the syscall wrappers in
std.os.linux to do the right thing for riscv32. For other 32-bit architectures,
we have to use the 64-bit time syscalls explicitly to solve the Y2038 problem.

Diffstat:
M
lib/std/os/linux.zig
 | 
5
+++--

1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/lib/std/os/linux.zig b/lib/std/os/linux.zig
@@ -6327,12 +6327,13 @@ pub const POSIX_FADV = switch (native_arch) {
 };
 
 /// The timespec struct used by the kernel.
-pub const kernel_timespec = if (@sizeOf(usize) >= 8) timespec else extern struct {
+pub const kernel_timespec = extern struct {
     sec: i64,
     nsec: i64,
 };
 
-pub const timespec = extern struct {
+// https://github.com/ziglang/zig/issues/4726#issuecomment-2190337877
+pub const timespec = if (!builtin.link_libc and native_arch == .riscv32) kernel_timespec else extern struct {
     sec: isize,
     nsec: isize,
 };