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"The Traveling Wilburys' - Handle With Care" 

Both `offset` and `len` are `off_t`.

Like the rest of the std lib we assume that `_FILE_OFFSET_BITS == 64`
is always true, so that `off_t` is a `u64`.

When passing to 32-bit kernels, we split these into two `u32`
parameters.
master
Joran Dirk Greef 2020-11-01 11:49:08 +02:00
parent 2fdb30a571
commit 2dd8613adc
1 changed files with 20 additions and 8 deletions
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28
lib/std/os/linux.zig
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@ -121,14 +121,26 @@ pub fn utimensat(dirfd: i32, path: ?[*:0]const u8, times: *const [2]timespec, fl
return syscall4(.utimensat, @bitCast(usize, @as(isize, dirfd)), @ptrToInt(path), @ptrToInt(times), flags);
}
pub fn fallocate(fd: i32, mode: i32, offset: usize, len: usize) usize {
return syscall4(
.fallocate,
@bitCast(usize, @as(isize, fd)),
@bitCast(usize, @as(isize, mode)),
offset,
len,
);
pub fn fallocate(fd: i32, mode: i32, offset: u64, len: u64) usize {
if (@sizeOf(usize) == 4) {
return syscall6(
.fallocate,
@bitCast(usize, @as(isize, fd)),
@bitCast(usize, @as(isize, mode)),
@truncate(usize, offset >> 32),
@truncate(usize, offset),
@truncate(usize, len >> 32),
@truncate(usize, len),
);
} else {
return syscall4(
.fallocate,
@bitCast(usize, @as(isize, fd)),
@bitCast(usize, @as(isize, mode)),
offset,
len,
);
}
}
pub fn futex_wait(uaddr: *const i32, futex_op: u32, val: i32, timeout: ?*timespec) usize {