Update libc crate to 0.2.55

This change updates the libc crate to version 0.2.55.

Import subrepo libc/:libc at caf17a0641d29dc624621177f5756804dd180c13

3 files changed, 191 insertions, 118 deletions

diff --git a/libc/src/unix/newlib/align.rs b/libc/src/unix/newlib/align.rs
new file mode 100644
index 0000000..c018fbc
--- /dev/null
+++ b/libc/src/unix/newlib/align.rs
@@ -0,0 +1,61 @@
+macro_rules! expand_align {
+    () => {
+        s! {
+            #[cfg_attr(all(target_pointer_width = "32",
+                           any(target_arch = "mips",
+                               target_arch = "arm",
+                               target_arch = "powerpc")),
+                       repr(align(4)))]
+            #[cfg_attr(any(target_pointer_width = "64",
+                           not(any(target_arch = "mips",
+                                   target_arch = "arm",
+                                   target_arch = "powerpc"))),
+                       repr(align(8)))]
+            pub struct pthread_mutex_t { // Unverified
+                size: [u8; ::__SIZEOF_PTHREAD_MUTEX_T],
+            }
+
+            #[cfg_attr(all(target_pointer_width = "32",
+                           any(target_arch = "mips",
+                               target_arch = "arm",
+                               target_arch = "powerpc")),
+                       repr(align(4)))]
+            #[cfg_attr(any(target_pointer_width = "64",
+                           not(any(target_arch = "mips",
+                                   target_arch = "arm",
+                                   target_arch = "powerpc"))),
+                       repr(align(8)))]
+            pub struct pthread_rwlock_t { // Unverified
+                size: [u8; ::__SIZEOF_PTHREAD_RWLOCK_T],
+            }
+
+            #[cfg_attr(any(target_pointer_width = "32",
+                           target_arch = "x86_64",
+                           target_arch = "powerpc64",
+                           target_arch = "mips64",
+                           target_arch = "s390x",
+                           target_arch = "sparc64"),
+                       repr(align(4)))]
+            #[cfg_attr(not(any(target_pointer_width = "32",
+                               target_arch = "x86_64",
+                               target_arch = "powerpc64",
+                               target_arch = "mips64",
+                               target_arch = "s390x",
+                               target_arch = "sparc64")),
+                       repr(align(8)))]
+            pub struct pthread_mutexattr_t { // Unverified
+                size: [u8; ::__SIZEOF_PTHREAD_MUTEXATTR_T],
+            }
+
+            #[repr(align(8))]
+            pub struct pthread_cond_t { // Unverified
+                size: [u8; ::__SIZEOF_PTHREAD_COND_T],
+            }
+
+            #[repr(align(4))]
+            pub struct pthread_condattr_t { // Unverified
+                size: [u8; ::__SIZEOF_PTHREAD_CONDATTR_T],
+            }
+        }
+    }
+}
diff --git a/libc/src/unix/newlib/mod.rs b/libc/src/unix/newlib/mod.rs
index 0cc411d..c9a25a3 100644
--- a/libc/src/unix/newlib/mod.rs
+++ b/libc/src/unix/newlib/mod.rs
@@ -1,5 +1,3 @@
-use dox::mem;
-
 pub type blkcnt_t = i32;
 pub type blksize_t = i32;
 pub type clock_t = i32;
@@ -238,103 +236,10 @@ s! {
         __size: [u64; 7]
     }
 
-    #[cfg_attr(all(feature = "align",
-                   target_pointer_width = "32",
-                   any(target_arch = "mips",
-                       target_arch = "arm",
-                       target_arch = "powerpc")),
-               repr(align(4)))]
-    #[cfg_attr(all(feature = "align",
-                   any(target_pointer_width = "64",
-                       not(any(target_arch = "mips",
-                               target_arch = "arm",
-                               target_arch = "powerpc")))),
-               repr(align(8)))]
-    pub struct pthread_mutex_t { // Unverified
-        #[cfg(all(not(feature = "align"),
-                  any(target_arch = "mips",
-                      target_arch = "arm",
-                      target_arch = "powerpc")))]
-        __align: [::c_long; 0],
-        #[cfg(not(any(feature = "align",
-                      target_arch = "mips",
-                      target_arch = "arm",
-                      target_arch = "powerpc")))]
-        __align: [::c_longlong; 0],
-        size: [u8; __SIZEOF_PTHREAD_MUTEX_T],
-    }
-
-    #[cfg_attr(all(feature = "align",
-                   target_pointer_width = "32",
-                   any(target_arch = "mips",
-                       target_arch = "arm",
-                       target_arch = "powerpc")),
-               repr(align(4)))]
-    #[cfg_attr(all(feature = "align",
-                   any(target_pointer_width = "64",
-                       not(any(target_arch = "mips",
-                               target_arch = "arm",
-                               target_arch = "powerpc")))),
-               repr(align(8)))]
-    pub struct pthread_rwlock_t { // Unverified
-        #[cfg(all(not(feature = "align"),
-                  any(target_arch = "mips",
-                      target_arch = "arm",
-                      target_arch = "powerpc")))]
-        __align: [::c_long; 0],
-        #[cfg(not(any(feature = "align",
-                      target_arch = "mips",
-                      target_arch = "arm",
-                      target_arch = "powerpc")))]
-        __align: [::c_longlong; 0],
-        size: [u8; __SIZEOF_PTHREAD_RWLOCK_T],
-    }
-
-    #[cfg_attr(all(feature = "align",
-                   any(target_pointer_width = "32",
-                       target_arch = "x86_64", target_arch = "powerpc64",
-                       target_arch = "mips64", target_arch = "s390x",
-                       target_arch = "sparc64")),
-               repr(align(4)))]
-    #[cfg_attr(all(feature = "align",
-                   not(any(target_pointer_width = "32",
-                           target_arch = "x86_64", target_arch = "powerpc64",
-                           target_arch = "mips64", target_arch = "s390x",
-                           target_arch = "sparc64"))),
-               repr(align(8)))]
-    pub struct pthread_mutexattr_t { // Unverified
-        #[cfg(all(not(feature = "align"),
-                  any(target_arch = "x86_64", target_arch = "powerpc64",
-                      target_arch = "mips64", target_arch = "s390x",
-                      target_arch = "sparc64")))]
-        __align: [::c_int; 0],
-        #[cfg(all(not(feature = "align"),
-                  not(any(target_arch = "x86_64", target_arch = "powerpc64",
-                          target_arch = "mips64", target_arch = "s390x",
-                          target_arch = "sparc64"))))]
-        __align: [::c_long; 0],
-        size: [u8; __SIZEOF_PTHREAD_MUTEXATTR_T],
-    }
-
     pub struct pthread_rwlockattr_t { // Unverified
         __lockkind: ::c_int,
         __pshared: ::c_int,
     }
-
-    #[cfg_attr(feature = "align", repr(align(8)))]
-    pub struct pthread_cond_t { // Unverified
-        #[cfg(not(feature = "align"))]
-        __align: [::c_longlong; 0],
-        size: [u8; __SIZEOF_PTHREAD_COND_T],
-    }
-
-    #[cfg_attr(feature = "align", repr(align(4)))]
-    pub struct pthread_condattr_t { // Unverified
-        #[cfg(not(feature = "align"))]
-        __align: [::c_int; 0],
-        size: [u8; __SIZEOF_PTHREAD_CONDATTR_T],
-    }
-
 }
 
 // unverified constants
@@ -501,7 +406,8 @@ pub const SEEK_SET: ::c_int = 0;
 pub const SEEK_CUR: ::c_int = 1;
 pub const SEEK_END: ::c_int = 2;
 
-pub const FIONBIO: ::c_int = 1;
+pub const FIONBIO: ::c_ulong = 1;
+pub const FIOCLEX: ::c_ulong = 0x20006601;
 
 pub const S_BLKSIZE: ::mode_t = 1024;
 pub const S_IREAD: ::mode_t = 256;
@@ -552,15 +458,41 @@ pub const SHUT_RD: ::c_int = 0;
 pub const SHUT_WR: ::c_int = 1;
 pub const SHUT_RDWR: ::c_int = 2;
 
-pub const SO_REUSEADDR: ::c_int = 4;
-pub const SO_LINGER: ::c_int = 128;
-pub const SO_OOBINLINE: ::c_int = 256;
-pub const SO_SNDBUF: ::c_int = 4097;
-pub const SO_RCVBUF: ::c_int = 4098;
-pub const SO_SNDLOWAT: ::c_int = 4099;
-pub const SO_RCVLOWAT: ::c_int = 4100;
-pub const SO_TYPE: ::c_int = 4104;
-pub const SO_ERROR: ::c_int = 4105;
+pub const SO_BINTIME: ::c_int = 0x2000;
+pub const SO_NO_OFFLOAD: ::c_int = 0x4000;
+pub const SO_NO_DDP: ::c_int = 0x8000;
+pub const SO_REUSEPORT_LB: ::c_int = 0x10000;
+pub const SO_LABEL: ::c_int = 0x1009;
+pub const SO_PEERLABEL: ::c_int = 0x1010;
+pub const SO_LISTENQLIMIT: ::c_int = 0x1011;
+pub const SO_LISTENQLEN: ::c_int = 0x1012;
+pub const SO_LISTENINCQLEN: ::c_int = 0x1013;
+pub const SO_SETFIB: ::c_int = 0x1014;
+pub const SO_USER_COOKIE: ::c_int = 0x1015;
+pub const SO_PROTOCOL: ::c_int = 0x1016;
+pub const SO_PROTOTYPE: ::c_int = SO_PROTOCOL;
+pub const SO_VENDOR: ::c_int = 0x80000000;
+pub const SO_DEBUG: ::c_int = 0x01;
+pub const SO_ACCEPTCONN: ::c_int = 0x0002;
+pub const SO_REUSEADDR: ::c_int = 0x0004;
+pub const SO_KEEPALIVE: ::c_int = 0x0008;
+pub const SO_DONTROUTE: ::c_int = 0x0010;
+pub const SO_BROADCAST: ::c_int = 0x0020;
+pub const SO_USELOOPBACK: ::c_int = 0x0040;
+pub const SO_LINGER: ::c_int = 0x0080;
+pub const SO_OOBINLINE: ::c_int = 0x0100;
+pub const SO_REUSEPORT: ::c_int = 0x0200;
+pub const SO_TIMESTAMP: ::c_int = 0x0400;
+pub const SO_NOSIGPIPE: ::c_int = 0x0800;
+pub const SO_ACCEPTFILTER: ::c_int = 0x1000;
+pub const SO_SNDBUF: ::c_int = 0x1001;
+pub const SO_RCVBUF: ::c_int = 0x1002;
+pub const SO_SNDLOWAT: ::c_int = 0x1003;
+pub const SO_RCVLOWAT: ::c_int = 0x1004;
+pub const SO_SNDTIMEO: ::c_int = 0x1005;
+pub const SO_RCVTIMEO: ::c_int = 0x1006;
+pub const SO_ERROR: ::c_int = 0x1007;
+pub const SO_TYPE: ::c_int = 0x1008;
 
 pub const SOCK_CLOEXEC: ::c_int = O_CLOEXEC;
 
@@ -586,20 +518,32 @@ pub const IFF_LINK2: ::c_int = 0x4000; // per link layer defined bit
 pub const IFF_ALTPHYS: ::c_int = IFF_LINK2; // use alternate physical connection
 pub const IFF_MULTICAST: ::c_int = 0x8000; // supports multicast
 
-pub const IPPROTO_IP: ::c_int = 0;
-pub const IPPROTO_UDP: ::c_int = 17;
-pub const IPPROTO_TCP: ::c_int = 6;
-
 pub const TCP_NODELAY: ::c_int = 8193;
 pub const TCP_MAXSEG: ::c_int = 8194;
+pub const TCP_NOPUSH: ::c_int = 4;
+pub const TCP_NOOPT: ::c_int = 8;
+pub const TCP_KEEPIDLE: ::c_int = 256;
+pub const TCP_KEEPINTVL: ::c_int = 512;
+pub const TCP_KEEPCNT: ::c_int = 1024;
 
-pub const IP_TOS: ::c_int = 7;
+pub const IP_TOS: ::c_int = 3;
 pub const IP_TTL: ::c_int = 8;
-pub const IP_MULTICAST_LOOP: ::c_int = 9;
+pub const IP_MULTICAST_IF: ::c_int = 9;
 pub const IP_MULTICAST_TTL: ::c_int = 10;
+pub const IP_MULTICAST_LOOP: ::c_int = 11;
 pub const IP_ADD_MEMBERSHIP: ::c_int = 11;
 pub const IP_DROP_MEMBERSHIP: ::c_int = 12;
 
+pub const IPV6_UNICAST_HOPS: ::c_int = 4;
+pub const IPV6_MULTICAST_IF: ::c_int = 9;
+pub const IPV6_MULTICAST_HOPS: ::c_int = 10;
+pub const IPV6_MULTICAST_LOOP: ::c_int = 11;
+pub const IPV6_V6ONLY: ::c_int = 27;
+pub const IPV6_JOIN_GROUP: ::c_int = 12;
+pub const IPV6_LEAVE_GROUP: ::c_int = 13;
+pub const IPV6_ADD_MEMBERSHIP: ::c_int = 12;
+pub const IPV6_DROP_MEMBERSHIP: ::c_int = 13;
+
 pub const HOST_NOT_FOUND: ::c_int = 1;
 pub const NO_DATA: ::c_int = 2;
 pub const NO_ADDRESS: ::c_int = 2;
@@ -627,20 +571,20 @@ pub const EAI_SOCKTYPE: ::c_int = -307;
 
 f! {
     pub fn FD_CLR(fd: ::c_int, set: *mut fd_set) -> () {
-        let bits = mem::size_of_val(&(*set).fds_bits[0]) * 8;
+        let bits = ::mem::size_of_val(&(*set).fds_bits[0]) * 8;
         let fd = fd as usize;
         (*set).fds_bits[fd / bits] &= !(1 << (fd % bits));
         return
     }
 
     pub fn FD_ISSET(fd: ::c_int, set: *mut fd_set) -> bool {
-        let bits = mem::size_of_val(&(*set).fds_bits[0]) * 8;
+        let bits = ::mem::size_of_val(&(*set).fds_bits[0]) * 8;
         let fd = fd as usize;
         return ((*set).fds_bits[fd / bits] & (1 << (fd % bits))) != 0
     }
 
     pub fn FD_SET(fd: ::c_int, set: *mut fd_set) -> () {
-        let bits = mem::size_of_val(&(*set).fds_bits[0]) * 8;
+        let bits = ::mem::size_of_val(&(*set).fds_bits[0]) * 8;
         let fd = fd as usize;
         (*set).fds_bits[fd / bits] |= 1 << (fd % bits);
         return
@@ -654,6 +598,12 @@ f! {
 }
 
 extern {
+    pub fn sem_destroy(sem: *mut sem_t) -> ::c_int;
+    pub fn sem_init(sem: *mut sem_t,
+                    pshared: ::c_int,
+                    value: ::c_uint)
+                    -> ::c_int;
+
     pub fn abs(i: ::c_int) -> ::c_int;
     pub fn atof(s: *const ::c_char) -> ::c_double;
     pub fn labs(i: ::c_long) -> ::c_long;
@@ -674,7 +624,7 @@ extern {
                    envp: *const *const ::c_char)
                    -> ::c_int;
     #[cfg_attr(target_os = "solaris", link_name = "__posix_getgrgid_r")]
-    pub fn getgrgid_r(uid: ::uid_t,
+    pub fn getgrgid_r(gid: ::gid_t,
                       grp: *mut ::group,
                       buf: *mut ::c_char,
                       buflen: ::size_t,
@@ -720,9 +670,9 @@ extern {
     #[cfg_attr(target_os = "solaris", link_name = "__posix_sigwait")]
     pub fn sigwait(set: *const sigset_t,
                    sig: *mut ::c_int) -> ::c_int;
-    pub fn pthread_atfork(prepare: Option<unsafe extern fn()>,
-                          parent: Option<unsafe extern fn()>,
-                          child: Option<unsafe extern fn()>) -> ::c_int;
+    pub fn pthread_atfork(prepare: ::Option<unsafe extern fn()>,
+                          parent: ::Option<unsafe extern fn()>,
+                          child: ::Option<unsafe extern fn()>) -> ::c_int;
     pub fn getgrgid(gid: ::gid_t) -> *mut ::group;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "popen$UNIX2003")]
@@ -744,3 +694,14 @@ cfg_if! {
         pub use target_arch_not_implemented;
     }
 }
+
+cfg_if! {
+    if #[cfg(libc_align)] {
+        #[macro_use]
+        mod align;
+    } else {
+        #[macro_use]
+        mod no_align;
+    }
+}
+expand_align!();
diff --git a/libc/src/unix/newlib/no_align.rs b/libc/src/unix/newlib/no_align.rs
new file mode 100644
index 0000000..316c464
--- /dev/null
+++ b/libc/src/unix/newlib/no_align.rs
@@ -0,0 +1,51 @@
+macro_rules! expand_align {
+    () => {
+        s! {
+            pub struct pthread_mutex_t { // Unverified
+                #[cfg(any(target_arch = "mips",
+                          target_arch = "arm",
+                          target_arch = "powerpc"))]
+                __align: [::c_long; 0],
+                #[cfg(not(any(target_arch = "mips",
+                              target_arch = "arm",
+                              target_arch = "powerpc")))]
+                __align: [::c_longlong; 0],
+                size: [u8; ::__SIZEOF_PTHREAD_MUTEX_T],
+            }
+
+            pub struct pthread_rwlock_t { // Unverified
+                #[cfg(any(target_arch = "mips",
+                          target_arch = "arm",
+                          target_arch = "powerpc"))]
+                __align: [::c_long; 0],
+                #[cfg(not(any(target_arch = "mips",
+                              target_arch = "arm",
+                              target_arch = "powerpc")))]
+                __align: [::c_longlong; 0],
+                size: [u8; ::__SIZEOF_PTHREAD_RWLOCK_T],
+            }
+
+            pub struct pthread_mutexattr_t { // Unverified
+                #[cfg(any(target_arch = "x86_64", target_arch = "powerpc64",
+                          target_arch = "mips64", target_arch = "s390x",
+                          target_arch = "sparc64"))]
+                __align: [::c_int; 0],
+                #[cfg(not(any(target_arch = "x86_64", target_arch = "powerpc64",
+                              target_arch = "mips64", target_arch = "s390x",
+                              target_arch = "sparc64")))]
+                __align: [::c_long; 0],
+                size: [u8; ::__SIZEOF_PTHREAD_MUTEXATTR_T],
+            }
+
+            pub struct pthread_cond_t { // Unverified
+                __align: [::c_longlong; 0],
+                size: [u8; ::__SIZEOF_PTHREAD_COND_T],
+            }
+
+            pub struct pthread_condattr_t { // Unverified
+                __align: [::c_int; 0],
+                size: [u8; ::__SIZEOF_PTHREAD_CONDATTR_T],
+            }
+        }
+    }
+}