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std.os.windows: map RtlGenRandom() failure to error.SystemResources

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Closes #23666.
This commit is contained in:
Alex Rønne Petersen 2025-08-07 17:28:37 +02:00
parent 3fb86841cc
commit 0d0f09fb0e
1 changed files with 7 additions and 2 deletions
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9
lib/std/os/windows.zig
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@ -408,7 +408,12 @@ pub fn SetHandleInformation(h: HANDLE, mask: DWORD, flags: DWORD) SetHandleInfor
}
}
pub const RtlGenRandomError = error{Unexpected};
pub const RtlGenRandomError = error{
/// `RtlGenRandom` has been known to fail in situations where the system is under heavy load.
/// Unfortunately, it does not call `SetLastError`, so it is not possible to get more specific
/// error information; it could actually be due to an out-of-memory condition, for example.
SystemResources,
};
/// Call RtlGenRandom() instead of CryptGetRandom() on Windows
/// https://github.com/rust-lang-nursery/rand/issues/111
@ -422,7 +427,7 @@ pub fn RtlGenRandom(output: []u8) RtlGenRandomError!void {
const to_read: ULONG = @min(buff.len, max_read_size);
if (advapi32.RtlGenRandom(buff.ptr, to_read) == 0) {
return unexpectedError(GetLastError());
return error.SystemResources;
}
total_read += to_read;