Initial vendor packages

Signed-off-by: Valentin Popov <valentin@popov.link>

1 files changed, 697 insertions, 0 deletions

diff --git a/vendor/hermit-abi/src/lib.rs b/vendor/hermit-abi/src/lib.rs
new file mode 100644
index 0000000..0521b2b
--- /dev/null
+++ b/vendor/hermit-abi/src/lib.rs
@@ -0,0 +1,697 @@
+//! `hermit-abi` is small interface to call functions from the
+//! [Hermit unikernel](https://github.com/hermitcore/kernel).
+
+#![no_std]
+#![allow(nonstandard_style)]
+#![allow(clippy::missing_safety_doc)]
+#![allow(clippy::result_unit_err)]
+
+pub mod errno;
+pub mod tcplistener;
+pub mod tcpstream;
+
+use core::ffi::{c_int, c_void};
+
+/// A thread handle type
+pub type Tid = u32;
+
+/// Maximum number of priorities
+pub const NO_PRIORITIES: usize = 31;
+
+/// Priority of a thread
+#[derive(PartialEq, Eq, PartialOrd, Ord, Debug, Clone, Copy)]
+pub struct Priority(u8);
+
+impl Priority {
+	pub const fn into(self) -> u8 {
+		self.0
+	}
+
+	pub const fn from(x: u8) -> Self {
+		Priority(x)
+	}
+}
+
+pub const HIGH_PRIO: Priority = Priority::from(3);
+pub const NORMAL_PRIO: Priority = Priority::from(2);
+pub const LOW_PRIO: Priority = Priority::from(1);
+
+/// A handle, identifying a socket
+#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Default, Hash)]
+pub struct Handle(usize);
+
+pub const NSEC_PER_SEC: u64 = 1_000_000_000;
+pub const FUTEX_RELATIVE_TIMEOUT: u32 = 1;
+pub const CLOCK_REALTIME: u64 = 1;
+pub const CLOCK_MONOTONIC: u64 = 4;
+pub const STDIN_FILENO: c_int = 0;
+pub const STDOUT_FILENO: c_int = 1;
+pub const STDERR_FILENO: c_int = 2;
+pub const O_RDONLY: i32 = 0o0;
+pub const O_WRONLY: i32 = 0o1;
+pub const O_RDWR: i32 = 0o2;
+pub const O_CREAT: i32 = 0o100;
+pub const O_EXCL: i32 = 0o200;
+pub const O_TRUNC: i32 = 0o1000;
+pub const O_APPEND: i32 = 0o2000;
+
+/// returns true if file descriptor `fd` is a tty
+pub fn isatty(_fd: c_int) -> bool {
+	false
+}
+
+/// `timespec` is used by `clock_gettime` to retrieve the
+/// current time
+#[derive(Copy, Clone, Debug)]
+#[repr(C)]
+pub struct timespec {
+	/// seconds
+	pub tv_sec: i64,
+	/// nanoseconds
+	pub tv_nsec: i64,
+}
+
+/// Internet protocol version.
+#[derive(Debug, Hash, PartialEq, Eq, PartialOrd, Ord, Clone, Copy)]
+pub enum Version {
+	Unspecified,
+	Ipv4,
+	Ipv6,
+}
+
+/// A four-octet IPv4 address.
+#[derive(Debug, Hash, PartialEq, Eq, PartialOrd, Ord, Clone, Copy, Default)]
+pub struct Ipv4Address(pub [u8; 4]);
+
+/// A sixteen-octet IPv6 address.
+#[derive(Debug, Hash, PartialEq, Eq, PartialOrd, Ord, Clone, Copy, Default)]
+pub struct Ipv6Address(pub [u8; 16]);
+
+/// An internetworking address.
+#[derive(Debug, Hash, PartialEq, Eq, PartialOrd, Ord, Clone, Copy)]
+pub enum IpAddress {
+	/// An unspecified address.
+	/// May be used as a placeholder for storage where the address is not assigned yet.
+	Unspecified,
+	/// An IPv4 address.
+	Ipv4(Ipv4Address),
+	/// An IPv6 address.
+	Ipv6(Ipv6Address),
+}
+
+/// The largest number `rand` will return
+pub const RAND_MAX: u64 = 2_147_483_647;
+
+pub const AF_INET: i32 = 0;
+pub const AF_INET6: i32 = 1;
+pub const IPPROTO_IP: i32 = 0;
+pub const IPPROTO_IPV6: i32 = 41;
+pub const IPPROTO_UDP: i32 = 17;
+pub const IPPROTO_TCP: i32 = 6;
+pub const IPV6_ADD_MEMBERSHIP: i32 = 12;
+pub const IPV6_DROP_MEMBERSHIP: i32 = 13;
+pub const IPV6_MULTICAST_LOOP: i32 = 19;
+pub const IPV6_V6ONLY: i32 = 27;
+pub const IP_TTL: i32 = 2;
+pub const IP_MULTICAST_TTL: i32 = 5;
+pub const IP_MULTICAST_LOOP: i32 = 7;
+pub const IP_ADD_MEMBERSHIP: i32 = 3;
+pub const IP_DROP_MEMBERSHIP: i32 = 4;
+pub const SHUT_RD: i32 = 0;
+pub const SHUT_WR: i32 = 1;
+pub const SHUT_RDWR: i32 = 2;
+pub const SOCK_DGRAM: i32 = 2;
+pub const SOCK_STREAM: i32 = 1;
+pub const SOL_SOCKET: i32 = 4095;
+pub const SO_BROADCAST: i32 = 32;
+pub const SO_ERROR: i32 = 4103;
+pub const SO_RCVTIMEO: i32 = 4102;
+pub const SO_REUSEADDR: i32 = 4;
+pub const SO_SNDTIMEO: i32 = 4101;
+pub const SO_LINGER: i32 = 128;
+pub const TCP_NODELAY: i32 = 1;
+pub const MSG_PEEK: i32 = 1;
+pub const FIONBIO: i32 = 0x8008667eu32 as i32;
+pub const EAI_NONAME: i32 = -2200;
+pub const EAI_SERVICE: i32 = -2201;
+pub const EAI_FAIL: i32 = -2202;
+pub const EAI_MEMORY: i32 = -2203;
+pub const EAI_FAMILY: i32 = -2204;
+pub const POLLIN: i16 = 0x1;
+pub const POLLPRI: i16 = 0x2;
+pub const POLLOUT: i16 = 0x4;
+pub const POLLERR: i16 = 0x8;
+pub const POLLHUP: i16 = 0x10;
+pub const POLLNVAL: i16 = 0x20;
+pub const POLLRDNORM: i16 = 0x040;
+pub const POLLRDBAND: i16 = 0x080;
+pub const POLLRDHUP: i16 = 0x2000;
+pub type sa_family_t = u8;
+pub type socklen_t = u32;
+pub type in_addr_t = u32;
+pub type in_port_t = u16;
+pub type time_t = i64;
+pub type suseconds_t = i64;
+pub type nfds_t = usize;
+
+#[repr(C)]
+#[derive(Debug, Copy, Clone)]
+pub struct in_addr {
+	pub s_addr: u32,
+}
+
+#[repr(C)]
+#[derive(Debug, Copy, Clone)]
+pub struct in6_addr {
+	pub s6_addr: [u8; 16],
+}
+
+#[repr(C)]
+#[derive(Debug, Copy, Clone)]
+pub struct sockaddr {
+	pub sa_len: u8,
+	pub sa_family: sa_family_t,
+	pub sa_data: [u8; 14],
+}
+
+#[repr(C)]
+#[derive(Debug, Copy, Clone)]
+pub struct sockaddr_in {
+	pub sin_len: u8,
+	pub sin_family: sa_family_t,
+	pub sin_port: u16,
+	pub sin_addr: in_addr,
+	pub sin_zero: [u8; 8],
+}
+
+#[repr(C)]
+#[derive(Debug, Copy, Clone)]
+pub struct sockaddr_in6 {
+	pub sin6_family: sa_family_t,
+	pub sin6_port: u16,
+	pub sin6_addr: in6_addr,
+	pub sin6_flowinfo: u32,
+	pub sin6_scope_id: u32,
+}
+
+#[repr(C)]
+#[derive(Debug, Copy, Clone)]
+pub struct addrinfo {
+	pub ai_flags: i32,
+	pub ai_family: i32,
+	pub ai_socktype: i32,
+	pub ai_protocol: i32,
+	pub ai_addrlen: socklen_t,
+	pub ai_addr: *mut sockaddr,
+	pub ai_canonname: *mut u8,
+	pub ai_next: *mut addrinfo,
+}
+
+#[repr(C)]
+#[derive(Debug, Copy, Clone)]
+pub struct sockaddr_storage {
+	pub s2_len: u8,
+	pub ss_family: sa_family_t,
+	pub s2_data1: [i8; 2usize],
+	pub s2_data2: [u32; 3usize],
+}
+
+#[repr(C)]
+#[derive(Debug, Copy, Clone)]
+pub struct ip_mreq {
+	pub imr_multiaddr: in_addr,
+	pub imr_interface: in_addr,
+}
+
+#[repr(C)]
+#[derive(Debug, Copy, Clone)]
+pub struct ipv6_mreq {
+	pub ipv6mr_multiaddr: in6_addr,
+	pub ipv6mr_interface: u32,
+}
+
+#[repr(C)]
+#[derive(Debug, Copy, Clone)]
+pub struct linger {
+	pub l_onoff: i32,
+	pub l_linger: i32,
+}
+
+#[repr(C)]
+#[derive(Debug, Copy, Clone)]
+pub struct timeval {
+	pub tv_sec: time_t,
+	pub tv_usec: suseconds_t,
+}
+
+#[repr(C)]
+#[derive(Debug, Copy, Clone)]
+pub struct pollfd {
+	pub fd: i32,      /* file descriptor */
+	pub events: i16,  /* events to look for */
+	pub revents: i16, /* events returned */
+}
+
+#[repr(C)]
+pub struct dirent {
+	pub d_ino: u64,
+	pub d_off: u64,
+	pub d_namelen: u32,
+	pub d_type: u32,
+	pub d_name: [u8; 0],
+}
+
+#[repr(C)]
+#[derive(Copy, Clone, Debug)]
+pub enum DirectoryEntry {
+	Invalid(i32),
+	Valid(*const dirent),
+}
+
+#[repr(C)]
+#[derive(Debug, Copy, Clone)]
+pub struct stat {
+	pub st_dev: u64,
+	pub st_ino: u64,
+	pub st_nlink: u64,
+	pub st_mode: u32,
+	pub st_uid: u32,
+	pub st_gid: u32,
+	pub st_rdev: u64,
+	pub st_size: i64,
+	pub st_blksize: i64,
+	pub st_blocks: i64,
+	pub st_atime: i64,
+	pub st_atime_nsec: i64,
+	pub st_mtime: i64,
+	pub st_mtime_nsec: i64,
+	pub st_ctime: i64,
+	pub st_ctime_nsec: i64,
+}
+
+pub const DT_UNKNOWN: u32 = 0;
+pub const DT_FIFO: u32 = 1;
+pub const DT_CHR: u32 = 2;
+pub const DT_DIR: u32 = 4;
+pub const DT_BLK: u32 = 6;
+pub const DT_REG: u32 = 8;
+pub const DT_LNK: u32 = 10;
+pub const DT_SOCK: u32 = 12;
+pub const DT_WHT: u32 = 14;
+
+pub const S_IFDIR: u32 = 16384;
+pub const S_IFREG: u32 = 32768;
+pub const S_IFLNK: u32 = 40960;
+pub const S_IFMT: u32 = 61440;
+
+// sysmbols, which are part of the library operating system
+extern "C" {
+	/// If the value at address matches the expected value, park the current thread until it is either
+	/// woken up with [`futex_wake`] (returns 0) or an optional timeout elapses (returns -ETIMEDOUT).
+	///
+	/// Setting `timeout` to null means the function will only return if [`futex_wake`] is called.
+	/// Otherwise, `timeout` is interpreted as an absolute time measured with [`CLOCK_MONOTONIC`].
+	/// If [`FUTEX_RELATIVE_TIMEOUT`] is set in `flags` the timeout is understood to be relative
+	/// to the current time.
+	///
+	/// Returns -EINVAL if `address` is null, the timeout is negative or `flags` contains unknown values.
+	#[link_name = "sys_futex_wait"]
+	pub fn futex_wait(
+		address: *mut u32,
+		expected: u32,
+		timeout: *const timespec,
+		flags: u32,
+	) -> i32;
+
+	/// Wake `count` threads waiting on the futex at `address`. Returns the number of threads
+	/// woken up (saturates to `i32::MAX`). If `count` is `i32::MAX`, wake up all matching
+	/// waiting threads. If `count` is negative or `address` is null, returns -EINVAL.
+	#[link_name = "sys_futex_wake"]
+	pub fn futex_wake(address: *mut u32, count: i32) -> i32;
+
+	/// sem_init() initializes the unnamed semaphore at the address
+	/// pointed to by `sem`.  The `value` argument specifies the
+	/// initial value for the semaphore.
+	#[link_name = "sys_sem_init"]
+	pub fn sem_init(sem: *mut *const c_void, value: u32) -> i32;
+
+	/// sem_destroy() frees the unnamed semaphore at the address
+	/// pointed to by `sem`.
+	#[link_name = "sys_sem_destroy"]
+	pub fn sem_destroy(sem: *const c_void) -> i32;
+
+	/// sem_post() increments the semaphore pointed to by `sem`.
+	/// If the semaphore's value consequently becomes greater
+	/// than zero, then another thread blocked in a sem_wait call
+	/// will be woken up and proceed to lock the semaphore.
+	#[link_name = "sys_sem_post"]
+	pub fn sem_post(sem: *const c_void) -> i32;
+
+	/// try to decrement a semaphore
+	///
+	/// sem_trywait() is the same as sem_timedwait(), except that
+	/// if the  decrement cannot be immediately performed, then  call
+	/// returns a negative value instead of blocking.
+	#[link_name = "sys_sem_trywait"]
+	pub fn sem_trywait(sem: *const c_void) -> i32;
+
+	/// decrement a semaphore
+	///
+	/// sem_timedwait() decrements the semaphore pointed to by `sem`.
+	/// If the semaphore's value is greater than zero, then the
+	/// the function returns immediately. If the semaphore currently
+	/// has the value zero, then the call blocks until either
+	/// it becomes possible to perform the decrement of the time limit
+	/// to wait for the semaphore is expired. A time limit `ms` of
+	/// means infinity waiting time.
+	#[link_name = "sys_timedwait"]
+	pub fn sem_timedwait(sem: *const c_void, ms: u32) -> i32;
+
+	/// Determines the id of the current thread
+	#[link_name = "sys_getpid"]
+	pub fn getpid() -> u32;
+
+	/// cause normal termination and return `arg`
+	/// to the host system
+	#[link_name = "sys_exit"]
+	pub fn exit(arg: i32) -> !;
+
+	/// cause abnormal termination
+	#[link_name = "sys_abort"]
+	pub fn abort() -> !;
+
+	/// suspend execution for microsecond intervals
+	///
+	/// The usleep() function suspends execution of the calling
+	/// thread for (at least) `usecs` microseconds.
+	#[link_name = "sys_usleep"]
+	pub fn usleep(usecs: u64);
+
+	/// spawn a new thread
+	///
+	/// spawn() starts a new thread. The new thread starts execution
+	/// by invoking `func(usize)`; `arg` is passed as the argument
+	/// to `func`. `prio` defines the priority of the new thread,
+	/// which can be between `LOW_PRIO` and `HIGH_PRIO`.
+	/// `core_id` defines the core, where the thread is located.
+	/// A negative value give the operating system the possibility
+	/// to select the core by its own.
+	#[link_name = "sys_spawn"]
+	pub fn spawn(
+		id: *mut Tid,
+		func: extern "C" fn(usize),
+		arg: usize,
+		prio: u8,
+		core_id: isize,
+	) -> i32;
+
+	/// spawn a new thread with user-specified stack size
+	///
+	/// spawn2() starts a new thread. The new thread starts execution
+	/// by invoking `func(usize)`; `arg` is passed as the argument
+	/// to `func`. `prio` defines the priority of the new thread,
+	/// which can be between `LOW_PRIO` and `HIGH_PRIO`.
+	/// `core_id` defines the core, where the thread is located.
+	/// A negative value give the operating system the possibility
+	/// to select the core by its own.
+	/// In contrast to spawn(), spawn2() is able to define the
+	/// stack size.
+	#[link_name = "sys_spawn2"]
+	pub fn spawn2(
+		func: extern "C" fn(usize),
+		arg: usize,
+		prio: u8,
+		stack_size: usize,
+		core_id: isize,
+	) -> Tid;
+
+	/// join with a terminated thread
+	///
+	/// The join() function waits for the thread specified by `id`
+	/// to terminate.
+	#[link_name = "sys_join"]
+	pub fn join(id: Tid) -> i32;
+
+	/// yield the processor
+	///
+	/// causes the calling thread to relinquish the CPU. The thread
+	/// is moved to the end of the queue for its static priority.
+	#[link_name = "sys_yield"]
+	pub fn yield_now();
+
+	/// get current time
+	///
+	/// The clock_gettime() functions allow the calling thread
+	/// to retrieve the value used by a clock which is specified
+	/// by `clock_id`.
+	///
+	/// `CLOCK_REALTIME`: the system's real time clock,
+	/// expressed as the amount of time since the Epoch.
+	///
+	/// `CLOCK_MONOTONIC`: clock that increments monotonically,
+	/// tracking the time since an arbitrary point
+	#[link_name = "sys_clock_gettime"]
+	pub fn clock_gettime(clock_id: u64, tp: *mut timespec) -> i32;
+
+	/// open and possibly create a file
+	///
+	/// The open() system call opens the file specified by `name`.
+	/// If the specified file does not exist, it may optionally
+	/// be created by open().
+	#[link_name = "sys_open"]
+	pub fn open(name: *const i8, flags: i32, mode: i32) -> i32;
+
+	/// open a directory
+	///
+	/// The opendir() system call opens the directory specified by `name`.
+	#[link_name = "sys_opendir"]
+	pub fn opendir(name: *const i8) -> i32;
+
+	/// delete the file it refers to `name`
+	#[link_name = "sys_unlink"]
+	pub fn unlink(name: *const i8) -> i32;
+
+	/// remove directory it refers to `name`
+	#[link_name = "sys_rmdir"]
+	pub fn rmdir(name: *const i8) -> i32;
+
+	/// stat
+	#[link_name = "sys_stat"]
+	pub fn stat(name: *const i8, stat: *mut stat) -> i32;
+
+	/// lstat
+	#[link_name = "sys_lstat"]
+	pub fn lstat(name: *const i8, stat: *mut stat) -> i32;
+
+	/// fstat
+	#[link_name = "sys_fstat"]
+	pub fn fstat(fd: i32, stat: *mut stat) -> i32;
+
+	/// determines the number of activated processors
+	#[link_name = "sys_get_processor_count"]
+	pub fn get_processor_count() -> usize;
+
+	#[link_name = "sys_malloc"]
+	pub fn malloc(size: usize, align: usize) -> *mut u8;
+
+	#[doc(hidden)]
+	#[link_name = "sys_realloc"]
+	pub fn realloc(ptr: *mut u8, size: usize, align: usize, new_size: usize) -> *mut u8;
+
+	#[doc(hidden)]
+	#[link_name = "sys_free"]
+	pub fn free(ptr: *mut u8, size: usize, align: usize);
+
+	#[link_name = "sys_notify"]
+	pub fn notify(id: usize, count: i32) -> i32;
+
+	#[doc(hidden)]
+	#[link_name = "sys_add_queue"]
+	pub fn add_queue(id: usize, timeout_ns: i64) -> i32;
+
+	#[doc(hidden)]
+	#[link_name = "sys_wait"]
+	pub fn wait(id: usize) -> i32;
+
+	#[doc(hidden)]
+	#[link_name = "sys_init_queue"]
+	pub fn init_queue(id: usize) -> i32;
+
+	#[doc(hidden)]
+	#[link_name = "sys_destroy_queue"]
+	pub fn destroy_queue(id: usize) -> i32;
+
+	/// initialize the network stack
+	#[link_name = "sys_network_init"]
+	pub fn network_init() -> i32;
+
+	/// Add current task to the queue of blocked tasks. After calling `block_current_task`,
+	/// call `yield_now` to switch to another task.
+	#[link_name = "sys_block_current_task"]
+	pub fn block_current_task();
+
+	/// Add current task to the queue of blocked tasks, but wake it when `timeout` milliseconds
+	/// have elapsed.
+	///
+	/// After calling `block_current_task`, call `yield_now` to switch to another task.
+	#[link_name = "sys_block_current_task_with_timeout"]
+	pub fn block_current_task_with_timeout(timeout: u64);
+
+	/// Wakeup task with the thread id `tid`
+	#[link_name = "sys_wakeup_taskt"]
+	pub fn wakeup_task(tid: Tid);
+
+	#[link_name = "sys_accept"]
+	pub fn accept(s: i32, addr: *mut sockaddr, addrlen: *mut socklen_t) -> i32;
+
+	/// bind a name to a socket
+	#[link_name = "sys_bind"]
+	pub fn bind(s: i32, name: *const sockaddr, namelen: socklen_t) -> i32;
+
+	#[link_name = "sys_connect"]
+	pub fn connect(s: i32, name: *const sockaddr, namelen: socklen_t) -> i32;
+
+	/// read from a file descriptor
+	///
+	/// read() attempts to read `len` bytes of data from the object
+	/// referenced by the descriptor `fd` into the buffer pointed
+	/// to by `buf`.
+	#[link_name = "sys_read"]
+	pub fn read(fd: i32, buf: *mut u8, len: usize) -> isize;
+
+	/// 'readdir' returns a pointer to a dirent structure
+	/// representing the next directory entry in the directory stream
+	/// pointed to by the file descriptor
+	#[link_name = "sys_readdir"]
+	pub fn readdir(fd: i32) -> DirectoryEntry;
+
+	/// 'mkdir' attempts to create a directory,
+	/// it returns 0 on success and -1 on error
+	#[link_name = "sys_mkdir"]
+	pub fn mkdir(name: *const i8, mode: u32) -> i32;
+
+	/// Fill `len` bytes in `buf` with cryptographically secure random data.
+	///
+	/// Returns either the number of bytes written to buf (a positive value) or
+	/// * `-EINVAL` if `flags` contains unknown flags.
+	/// * `-ENOSYS` if the system does not support random data generation.
+	#[link_name = "sys_read_entropy"]
+	pub fn read_entropy(buf: *mut u8, len: usize, flags: u32) -> isize;
+
+	/// receive() a message from a socket
+	#[link_name = "sys_recv"]
+	pub fn recv(socket: i32, buf: *mut u8, len: usize, flags: i32) -> isize;
+
+	/// receive() a message from a socket
+	#[link_name = "sys_recvfrom"]
+	pub fn recvfrom(
+		socket: i32,
+		buf: *mut u8,
+		len: usize,
+		flags: i32,
+		addr: *mut sockaddr,
+		addrlen: *mut socklen_t,
+	) -> isize;
+
+	/// write to a file descriptor
+	///
+	/// write() attempts to write `len` of data to the object
+	/// referenced by the descriptor `fd` from the
+	/// buffer pointed to by `buf`.
+	#[link_name = "sys_write"]
+	pub fn write(fd: i32, buf: *const u8, len: usize) -> isize;
+
+	/// close a file descriptor
+	///
+	/// The close() call deletes a file descriptor `fd` from the object
+	/// reference table.
+	#[link_name = "sys_close"]
+	pub fn close(fd: i32) -> i32;
+
+	/// duplicate an existing file descriptor
+	#[link_name = "sys_dup"]
+	pub fn dup(fd: i32) -> i32;
+
+	#[link_name = "sys_getpeername"]
+	pub fn getpeername(s: i32, name: *mut sockaddr, namelen: *mut socklen_t) -> i32;
+
+	#[link_name = "sys_getsockname"]
+	pub fn getsockname(s: i32, name: *mut sockaddr, namelen: *mut socklen_t) -> i32;
+
+	#[link_name = "sys_getsockopt"]
+	pub fn getsockopt(
+		s: i32,
+		level: i32,
+		optname: i32,
+		optval: *mut c_void,
+		optlen: *mut socklen_t,
+	) -> i32;
+
+	#[link_name = "sys_setsockopt"]
+	pub fn setsockopt(
+		s: i32,
+		level: i32,
+		optname: i32,
+		optval: *const c_void,
+		optlen: socklen_t,
+	) -> i32;
+
+	#[link_name = "sys_ioctl"]
+	pub fn ioctl(s: i32, cmd: i32, argp: *mut c_void) -> i32;
+
+	#[link_name = "sys_pool"]
+	pub fn poll(fds: *mut pollfd, nfds: nfds_t, timeout: i32) -> i32;
+
+	/// listen for connections on a socket
+	///
+	/// The `backlog` parameter defines the maximum length for the queue of pending
+	/// connections. Currently, the `backlog` must be one.
+	#[link_name = "sys_listen"]
+	pub fn listen(s: i32, backlog: i32) -> i32;
+
+	#[link_name = "sys_send"]
+	pub fn send(s: i32, mem: *const c_void, len: usize, flags: i32) -> isize;
+
+	#[link_name = "sys_sendto"]
+	pub fn sendto(
+		s: i32,
+		mem: *const c_void,
+		len: usize,
+		flags: i32,
+		to: *const sockaddr,
+		tolen: socklen_t,
+	) -> isize;
+
+	/// shut down part of a full-duplex connection
+	#[link_name = "sys_shutdown_socket"]
+	pub fn shutdown_socket(s: i32, how: i32) -> i32;
+
+	#[link_name = "sys_socket"]
+	pub fn socket(domain: i32, type_: i32, protocol: i32) -> i32;
+
+	#[link_name = "sys_freeaddrinfo"]
+	pub fn freeaddrinfo(ai: *mut addrinfo);
+
+	#[link_name = "sys_getaddrinfo"]
+	pub fn getaddrinfo(
+		nodename: *const i8,
+		servname: *const u8,
+		hints: *const addrinfo,
+		res: *mut *mut addrinfo,
+	) -> i32;
+
+	fn sys_get_priority() -> u8;
+	fn sys_set_priority(tid: Tid, prio: u8);
+}
+
+/// Determine the priority of the current thread
+#[inline(always)]
+pub unsafe fn get_priority() -> Priority {
+	Priority::from(sys_get_priority())
+}
+
+/// Determine the priority of the current thread
+#[inline(always)]
+pub unsafe fn set_priority(tid: Tid, prio: Priority) {
+	sys_set_priority(tid, prio.into());
+}