Add poll API

Signed-off-by: David Henningsson <[email protected]>

Author: diwic

libc-test/build.rs

@@ -88,6 +88,7 @@ fn main() {
         cfg.header("sys/uio.h");
         cfg.header("sched.h");
         cfg.header("termios.h");
+        cfg.header("poll.h");
     }
 
     if android {

src/unix/mod.rs

@@ -10,6 +10,7 @@ pub type in_addr_t = u32;
 pub type in_port_t = u16;
 pub type sighandler_t = ::size_t;
 pub type cc_t = ::c_uchar;
+pub type nfds_t = ::c_ulong;
 
 pub enum DIR {}
 
@@ -91,6 +92,12 @@ s! {
         pub iov_base: *mut ::c_void,
         pub iov_len: ::size_t,
     }
+
+    pub struct pollfd {
+        pub fd: ::c_int,
+        pub events: ::c_short,
+        pub revents: ::c_short,
+    }
 }
 
 pub const WNOHANG: ::c_int = 1;
@@ -117,6 +124,13 @@ pub const S_ISUID: ::c_int = 0x800;
 pub const S_ISGID: ::c_int = 0x400;
 pub const S_ISVTX: ::c_int = 0x200;
 
+pub const POLLIN: ::c_short = 0x1;
+pub const POLLPRI: ::c_short = 0x2;
+pub const POLLOUT: ::c_short = 0x4;
+pub const POLLERR: ::c_short = 0x8;
+pub const POLLHUP: ::c_short = 0x10;
+pub const POLLNVAL: ::c_short = 0x20;
+
 cfg_if! {
     if #[cfg(feature = "default")] {
         // cargo build, don't pull in anything extra as the libstd  dep
@@ -548,6 +562,7 @@ extern {
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "recvmsg$UNIX2003")]
     pub fn recvmsg(fd: ::c_int, msg: *mut msghdr, flags: ::c_int) -> ::ssize_t;
+    pub fn poll(fds: *mut pollfd, nfds: nfds_t, timeout: ::c_int) -> ::c_int;
 }
 
 // TODO: get rid of this #[cfg(not(...))]