alongside the typical msghdr struct, Zig has added a msghdr_const
type that can be used with sendmsg which allows const data to
be provided. I believe that data pointed to by the iov and control
fields in msghdr are also left unmodified, in which case they can
be marked const as well.
EnvMap provides the same API as the previously used BufMap (besides `putMove` and `getPtr`), so usage sites of `getEnvMap` can usually remain unchanged.
For non-Windows, EnvMap is a wrapper around BufMap. On Windows, it uses a new EnvMapWindows to handle some Windows-specific behavior:
- Lookups use Unicode-aware case insensitivity (but `get` cannot return an error because EnvMapWindows has an internal buffer to use for lookup conversions)
- Canonical names are returned when iterating the EnvMap
Fixes#10561, closes#4603
Windows does Unicode-aware case-insensitivity comparisons for environment variable names. Before, os.getenvW was only doing ASCII case-insensitivity. We can take advantage of RtlEqualUnicodeString in NtDll to get the proper Unicode case insensitivity.
I've seen having this be wrong break some cross-compilers, and it's
also how it is in other files so it's best to be consistent.
It's also just the actual casing of the file.
Some systems (Solaris, OpenBSD, AIX) change their definitions of
sockaddr_storage to be larger than 128 bytes. This comment adds a new
constant in the `sockaddr` that defines the size for every system.
Fixes#9759
Extract existing constants to do with TCP socket options into a 'TCP'
namespace.
Export 'MSG' and 'TCP' from std.os.{linux, windows} into std.c.
Fix compile errors to do with std.x.os.Socket methods related to setting
TCP socket options.
Handle errors in the case that an interface could not be resolved in an
IPv6 address on Windows. Tested using Wine with the loopback interface
disabled.
Have all instantiations of std.x.os.Socket on Windows instantiate an
overlapped socket descriptor. Fixes the '1ms read timeout' test in
std.x.net.tcp.Client. The test would previously deadlock, as read
timeouts only apply to overlapped sockets.
Windows documentation by default recommends that most instantiations of
sockets on Windows be overlapped sockets (s.t. they may operate in both
blocking or nonblocking mode when operated with WSA* syscalls). Refer to
the documentation for WSASocketA for more info.
* std lib tests are passing on x86_64-linux with and without -lc
* stage2 is building from source on x86_64-linux
* down to 38 remaining uses of `usingnamespace`
We already have a LICENSE file that covers the Zig Standard Library. We
no longer need to remind everyone that the license is MIT in every single
file.
Previously this was introduced to clarify the situation for a fork of
Zig that made Zig's LICENSE file harder to find, and replaced it with
their own license that required annual payments to their company.
However that fork now appears to be dead. So there is no need to
reinforce the copyright notice in every single file.
This finishes LemonBoy's Draft PR ziglang#6750. It updates ChildProcess to collect the output from stdout/stderr asynchronously using Overlapped IO and named pipes.
Reading stdin&stderr at different times may lead to nasty deadlocks (eg.
when stdout is read before stderr and the child process doesn't write
anything onto stdout).
Implement a polling mechanism to make sure this won't happen: we read
data from stderr/stdout as it becomes ready and then it's copied into an
ArrayList provided by the user, avoiding any kind of blocking read.
`msghdr` and `msghdr_const` definitions have been added back the way
they were in std.os. std.os.sendmsg has also been modified to accept a
msghdr_const again to ensure backwards-compatibility with this PR.
Underneath the hood, std.os.sendmsg will @ptrCast the provided
msghdr_const into a std.x.os.Socket.Message.
`sockaddr_storage` definitions have been added back the way they were in
std.os, except that it now simply aliases
std.x.os.Socket.Address.Native.Storage as all of
std.x.os.Socket.Address.Native.Storage's fields are equivalent to the
fields that were previously defined for std.x.os.bits.sockaddr_storage.
std.x.os.Socket.sendMessage now no longer is a stub that aliases
std.os.sendmsg, but instead calls and handles
errors from std.os.system.sendmsg directly.
Addresses feedback to urge backwards compatibility from @andrewrk.
Cross-platform versions of msghdr, sendmsg, recvmsg, linger, and iovec
were provided based on findings from glibc, musl, and Microsoft's
documentation.
Implemented initial Reactor interface for epoll (linux) which wraps
around I/O reactor subsystems such as epoll, kqueue, select, etc. across
different platforms. The Reactor interface allows for driving async I/O
in Zig applications.
A test was added for the Reactor interface to drive a TCP
client/listener socket pair.
A greatest-common-subset of possible socket initialization flags (close
socket on exec syscalls, initialize socket to be non-blocking) were
implemented.
A test was added for using sendmsg/recvmsg syscalls across different
platforms for a TCP client/listener socket pair.
