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2020-08-05Add fallback for cfg(unix) targets that do not define libc::_SC_IOV_MAX.Adam Reichold-0/+7
2020-08-05Rely only on POSIX semantics for I/O vector countAdam Reichold-17/+3
All #[cfg(unix)] platforms follow the POSIX standard and define _SC_IOV_MAX so that we rely purely on POSIX semantics to determine the limits on I/O vector count.
2020-08-05Reduce synchronization overhead of I/O vector count memoizationAdam Reichold-10/+14
2020-08-05Memoize the I/O vector count limitAdam Reichold-12/+17
Keep the I/O vector count limit in a `SyncOnceCell` to avoid the overhead of repeatedly calling `sysconf` as these limits are guaranteed to not change during the lifetime of a process by POSIX.
2020-08-05Query maximum vector count on Linux and macOSAdam Reichold-2/+36
Both Linux and MacOS enforce limits on the vector count when performing vectored I/O via the readv and writev system calls and return EINVAL when these limits are exceeded. This changes the standard library to handle those limits as short reads and writes to avoid forcing its users to query these limits using platform specific mechanisms.
2020-08-05Fix wasi::fs::OpenOptions to imply write when append is onYuto Kawamura-3/+5
2020-07-31`#![deny(unsafe_op_in_unsafe_fn)]` in sys/hermitmaekawatoshiki-75/+147
2020-07-31Fix std::fs::File::metadata permission on WASI targetShen-Ta Hsieh-0/+1
Previously `std::fs::File::metadata` on wasm32-wasi would call `fd_filestat_get` to get metadata associated with fd, but that fd is opened without RIGHTS_FD_FILESTAT_GET right, so it will failed on correctly implemented WASI environment. This change instead to add the missing rights when opening an fd.
2020-07-28Update stdarch submoduleAlex Crichton-9/+9
This commit updates the src/stdarch submodule primarily to include rust-lang/stdarch#874 which updated and revamped WebAssembly SIMD intrinsics and renamed WebAssembly atomics intrinsics. This is all unstable surface area of the standard library so the changes should be ok here. The SIMD updates also enable SIMD intrinsics to be used by any program any any time, yay! cc #74372, a tracking issue I've opened for the stabilization of SIMD intrinsics
2020-07-28adjust remaining targetsStefan Lankes-2/+2
- fix commit 7dc3886 - previous commit doesn't adjust all targets
2020-07-28Get pointer from address of c directlyLzu Tao-2/+2
2020-07-28Make use of macro to avoid repetitionLzu Tao-23/+10
2020-07-28Remove redundant len bindingLzu Tao-3/+1
2020-07-27mv std libs to library/mark-0/+41827
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