Provide kevent::new(), an EV_SET analogue, and nevents_type

both to make working with kevent easier across BSD variants

libc-test/build.rs

@@ -348,6 +348,9 @@ fn main() {
             // sighandler_t is crazy across platforms
             "sighandler_t" => true,
 
+            // A helper type for BSD platform, not actually defined on the system
+            "nevents_type" => true,
+
             _ => false
         }
     });

src/unix/bsd/apple/mod.rs

@@ -23,6 +23,7 @@ pub type nl_item = ::c_int;
 pub type id_t = ::c_uint;
 pub type sem_t = ::c_int;
 pub type idtype_t = ::c_uint;
+pub type nevents_type = ::c_int;
 
 pub enum timezone {}
 
@@ -413,6 +414,24 @@ s! {
     }
 }
 
+impl kevent {
+    /// Constructs a `kevent` structure. This is an analogue
+    /// of the libc `EV_SET` macro and has the same signature
+    /// across BSD variants.
+    pub fn new(ident: usize, filter: i16, flags: u16,
+        fflags: u32, data: isize, udata: usize) -> kevent {
+        // The types of the various filter & flags args are the same
+        // as the appropriate integer constants so as to make the usage easier
+        kevent {
+            ident: ident,
+            filter: filter,
+            flags: flags,
+            fflags: fflags,
+            data: data,
+            udata: udata as *mut ::c_void,
+        }
+    }
+}
 pub const _UTX_USERSIZE: usize = 256;
 pub const _UTX_LINESIZE: usize = 32;
 pub const _UTX_IDSIZE: usize = 4;

src/unix/bsd/freebsdlike/mod.rs

@@ -13,6 +13,7 @@ pub type tcflag_t = ::c_uint;
 pub type speed_t = ::c_uint;
 pub type nl_item = ::c_int;
 pub type id_t = i64;
+pub type nevents_type = ::c_int;
 
 pub enum timezone {}
 
@@ -161,6 +162,25 @@ s! {
     }
 }
 
+impl kevent {
+    /// Constructs a `kevent` structure. This is an analogue
+    /// of the libc `EV_SET` macro and has the same signature
+    /// across BSD variants.
+    pub fn new(ident: usize, filter: i16, flags: u16,
+        fflags: u32, data: isize, udata: usize) -> kevent {
+        // The types of the various filter & flags args are the same
+        // as the appropriate integer constants so as to make the usage easier
+        kevent {
+            ident: ident,
+            filter: filter as ::c_short,
+            flags: flags as ::c_ushort,
+            fflags: fflags as ::c_uint,
+            data: data,
+            udata: udata as *mut ::c_void,
+        }
+    }
+}
+
 pub const AIO_LISTIO_MAX: ::c_int = 16;
 pub const AIO_CANCELED: ::c_int = 1;
 pub const AIO_NOTCANCELED: ::c_int = 2;

src/unix/bsd/netbsdlike/netbsd/mod.rs

@@ -5,6 +5,7 @@ pub type blksize_t = ::int32_t;
 pub type fsblkcnt_t = ::uint64_t;
 pub type fsfilcnt_t = ::uint64_t;
 pub type idtype_t = ::c_int;
+pub type nevents_type = ::size_t;
 
 s! {
     pub struct aiocb {
@@ -283,6 +284,25 @@ s! {
     }
 }
 
+impl kevent {
+    /// Constructs a `kevent` structure. This is an analogue
+    /// of the libc `EV_SET` macro and has the same signature
+    /// across BSD variants.
+    pub fn new(ident: usize, filter: i16, flags: u16,
+        fflags: u32, data: isize, udata: usize) -> kevent {
+        // The types of the various filter & flags args are the same
+        // as the appropriate integer constants so as to make the usage easier
+        kevent {
+            ident: ident,
+            filter: filter as ::uint32_t,
+            flags: flags as ::uint32_t,
+            fflags: fflags,
+            data: data as ::int64_t,
+            udata: udata as ::intptr_t,
+        }
+    }
+}
+
 pub const AT_FDCWD: ::c_int = -100;
 pub const AT_EACCESS: ::c_int = 0x100;
 pub const AT_SYMLINK_NOFOLLOW: ::c_int = 0x200;

src/unix/bsd/netbsdlike/openbsdlike/mod.rs

@@ -14,6 +14,7 @@ pub type pthread_cond_t = *mut ::c_void;
 pub type pthread_condattr_t = *mut ::c_void;
 pub type pthread_rwlock_t = *mut ::c_void;
 pub type pthread_rwlockattr_t = *mut ::c_void;
+pub type nevents_type = ::c_int;
 
 s! {
     pub struct dirent {
@@ -178,6 +179,25 @@ s! {
     }
 }
 
+impl kevent {
+    /// Constructs a `kevent` structure. This is an analogue
+    /// of the libc `EV_SET` macro and has the same signature
+    /// across BSD variants.
+    pub fn new(ident: usize, filter: i16, flags: u16,
+        fflags: u32, data: isize, udata: usize) -> kevent {
+        // The types of the various filter & flags args are the same
+        // as the appropriate integer constants so as to make the usage easier
+        kevent {
+            ident: ident,
+            filter: filter as ::c_short,
+            flags: flags as ::c_ushort,
+            fflags: fflags as ::c_uint,
+            data: data as ::int64_t,
+            udata: udata as *mut ::c_void,
+        }
+    }
+}
+
 pub const UT_NAMESIZE: usize = 32;
 pub const UT_LINESIZE: usize = 8;
 pub const UT_HOSTSIZE: usize = 256;