pthread_rwlock_t

pub const pthread_rwlock_t = switch (native_os) {
    .linux => switch (native_abi) {
        .android, .androideabi => switch (@sizeOf(usize)) {
            4 => extern struct {
                data: [40]u8 align(@alignOf(usize)) = @splat(0),
            },
            8 => extern struct {
                data: [56]u8 align(@alignOf(usize)) = @splat(0),
            },
            else => @compileError("impossible pointer size"),
        },
        else => extern struct {
            data: [56]u8 align(@alignOf(usize)) = @splat(0),
        },
    },
    .driverkit, .ios, .maccatalyst, .macos, .tvos, .visionos, .watchos => extern struct {
        sig: c_long = 0x2DA8B3B4,
        data: [192]u8 = @splat(0),
    },
    .freebsd, .dragonfly, .openbsd => extern struct {
        ptr: ?*anyopaque = null,
    },
    .hermit => extern struct {
        ptr: usize = maxInt(usize),
    },
    .netbsd => extern struct {
        magic: c_uint = 0x99990009,
        interlock: switch (builtin.cpu.arch) {
            .aarch64, .aarch64_be, .m68k, .sparc, .sparc64, .x86, .x86_64 => u8,
            .arm, .armeb, .powerpc => c_int,
            .mips, .mipsel, .mips64, .mips64el => c_uint,
            else => unreachable,
        } = 0,
        rblocked_first: ?*u8 = null,
        rblocked_last: ?*u8 = null,
        wblocked_first: ?*u8 = null,
        wblocked_last: ?*u8 = null,
        nreaders: c_uint = 0,
        owner: ?pthread_t = null,
        private: ?*anyopaque = null,
    },
    .illumos => extern struct {
        readers: i32 = 0,
        type: u16 = 0,
        magic: u16 = 0x5257,
        mutex: pthread_mutex_t = .{},
        readercv: pthread_cond_t = .{},
        writercv: pthread_cond_t = .{},
    },
    .fuchsia => extern struct {
        size: [56]u8 align(@alignOf(usize)) = @splat(0),
    },
    .emscripten => extern struct {
        size: [32]u8 align(4) = @splat(0),
    },
    // https://github.com/SerenityOS/serenity/blob/b98f537f117b341788023ab82e0c11ca9ae29a57/Kernel/API/POSIX/sys/types.h#L86
    .serenity => extern struct {
        inner: u64 = 0,
    },
    else => void,
}