1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105

// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

//! Raw OS-specific types for the current platform/architecture

#![stable(feature = "raw_os", since = "1.1.0")]

use fmt;

#[cfg(any(all(target_os = "linux", any(target_arch = "aarch64",
                                       target_arch = "arm",
                                       target_arch = "powerpc",
                                       target_arch = "powerpc64",
                                       target_arch = "s390x")),
          all(target_os = "android", any(target_arch = "aarch64",
                                         target_arch = "arm")),
          all(target_os = "l4re", target_arch = "x86_64"),
          all(target_os = "fuchsia", target_arch = "aarch64")))]
#[stable(feature = "raw_os", since = "1.1.0")] pub type c_char = u8;
#[cfg(not(any(all(target_os = "linux", any(target_arch = "aarch64",
                                           target_arch = "arm",
                                           target_arch = "powerpc",
                                           target_arch = "powerpc64",
                                           target_arch = "s390x")),
              all(target_os = "android", any(target_arch = "aarch64",
                                             target_arch = "arm")),
              all(target_os = "l4re", target_arch = "x86_64"),
              all(target_os = "fuchsia", target_arch = "aarch64"))))]
#[stable(feature = "raw_os", since = "1.1.0")] pub type c_char = i8;
#[stable(feature = "raw_os", since = "1.1.0")] pub type c_schar = i8;
#[stable(feature = "raw_os", since = "1.1.0")] pub type c_uchar = u8;
#[stable(feature = "raw_os", since = "1.1.0")] pub type c_short = i16;
#[stable(feature = "raw_os", since = "1.1.0")] pub type c_ushort = u16;
#[stable(feature = "raw_os", since = "1.1.0")] pub type c_int = i32;
#[stable(feature = "raw_os", since = "1.1.0")] pub type c_uint = u32;
#[cfg(any(target_pointer_width = "32", windows))]
#[stable(feature = "raw_os", since = "1.1.0")] pub type c_long = i32;
#[cfg(any(target_pointer_width = "32", windows))]
#[stable(feature = "raw_os", since = "1.1.0")] pub type c_ulong = u32;
#[cfg(all(target_pointer_width = "64", not(windows)))]
#[stable(feature = "raw_os", since = "1.1.0")] pub type c_long = i64;
#[cfg(all(target_pointer_width = "64", not(windows)))]
#[stable(feature = "raw_os", since = "1.1.0")] pub type c_ulong = u64;
#[stable(feature = "raw_os", since = "1.1.0")] pub type c_longlong = i64;
#[stable(feature = "raw_os", since = "1.1.0")] pub type c_ulonglong = u64;
#[stable(feature = "raw_os", since = "1.1.0")] pub type c_float = f32;
#[stable(feature = "raw_os", since = "1.1.0")] pub type c_double = f64;

/// Type used to construct void pointers for use with C.
///
/// This type is only useful as a pointer target. Do not use it as a
/// return type for FFI functions which have the `void` return type in
/// C. Use the unit type `()` or omit the return type instead.
// NB: For LLVM to recognize the void pointer type and by extension
//     functions like malloc(), we need to have it represented as i8* in
//     LLVM bitcode. The enum used here ensures this and prevents misuse
//     of the "raw" type by only having private variants.. We need two
//     variants, because the compiler complains about the repr attribute
//     otherwise.
#[repr(u8)]
#[stable(feature = "raw_os", since = "1.1.0")]
pub enum c_void {
    #[unstable(feature = "c_void_variant", reason = "should not have to exist",
               issue = "0")]
    #[doc(hidden)] __variant1,
    #[unstable(feature = "c_void_variant", reason = "should not have to exist",
               issue = "0")]
    #[doc(hidden)] __variant2,
}

#[stable(feature = "std_debug", since = "1.16.0")]
impl fmt::Debug for c_void {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.pad("c_void")
    }
}

#[cfg(test)]
#[allow(unused_imports)]
mod tests {
    use any::TypeId;
    use libc;
    use mem;

    macro_rules! ok {
        ($($t:ident)*) => {$(
            assert!(TypeId::of::<libc::$t>() == TypeId::of::<raw::$t>(),
                    "{} is wrong", stringify!($t));
        )*}
    }

    #[test]
    fn same() {
        use os::raw;
        ok!(c_char c_schar c_uchar c_short c_ushort c_int c_uint c_long c_ulong
            c_longlong c_ulonglong c_float c_double);
    }
}