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| author | Chris O'Hara <cohara87@gmail.com> | 2023-05-08 17:06:08 +1000 |
|---|---|---|
| committer | Gopher Robot <gobot@golang.org> | 2023-05-11 23:29:04 +0000 |
| commit | 41893389a6fb6d4d8b181cd90ca58d9d65326f76 (patch) | |
| tree | f9636c4a2e3f1bfedbb60c413f6d6658bbbf4030 /src/internal | |
| parent | 70247126415246c7716ec4d28d6bc1f4077aee1f (diff) | |
| download | go-git-41893389a6fb6d4d8b181cd90ca58d9d65326f76.tar.gz | |
syscall: implement wasip1 SetNonblock and IsNonblock
Allows for the NONBLOCK file descriptor flag to be set and queried
on wasip1.
syscall.SetNonblock uses the fd_fdstat_set_flags WASI system call
and unix.IsNonblock uses the fd_fdstat_get system call.
This is a prerequisite for non-blocking I/O support.
Change-Id: I2bf79fd57142b2ec53eed3977d9aac8c6337eb80
Reviewed-on: https://go-review.googlesource.com/c/go/+/493356
Auto-Submit: Johan Brandhorst-Satzkorn <johan.brandhorst@gmail.com>
Run-TryBot: Johan Brandhorst-Satzkorn <johan.brandhorst@gmail.com>
Reviewed-by: Julien Fabre <ju.pryz@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Johan Brandhorst-Satzkorn <johan.brandhorst@gmail.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Achille Roussel <achille.roussel@gmail.com>
Diffstat (limited to 'src/internal')
| -rw-r--r-- | src/internal/syscall/unix/nonblocking_wasip1.go | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/src/internal/syscall/unix/nonblocking_wasip1.go b/src/internal/syscall/unix/nonblocking_wasip1.go index 49a2a232ba..208db28c3e 100644 --- a/src/internal/syscall/unix/nonblocking_wasip1.go +++ b/src/internal/syscall/unix/nonblocking_wasip1.go @@ -6,6 +6,22 @@ package unix +import ( + "syscall" + _ "unsafe" // for go:linkname +) + func IsNonblock(fd int) (nonblocking bool, err error) { - return false, nil + flags, e1 := fd_fdstat_get_flags(fd) + if e1 != nil { + return false, e1 + } + return flags&syscall.FDFLAG_NONBLOCK != 0, nil } + +// This helper is implemented in the syscall package. It means we don't have +// to redefine the fd_fdstat_get host import or the fdstat struct it +// populates. +// +//go:linkname fd_fdstat_get_flags syscall.fd_fdstat_get_flags +func fd_fdstat_get_flags(fd int) (uint32, error) |