Auto merge of #1336 - faern:add-futex-consts, r=gnzlbg

Add futex constants

Adding some Futex constants. To be used in `parking_lot`. See https://github.com/faern/parking_lot/pull/1/files#r283110797

Author: bors

libc-test/build.rs

@@ -1245,6 +1245,7 @@ fn test_android(target: &str) {
                "ifaddrs.h",
                "limits.h",
                "linux/dccp.h",
+               "linux/futex.h",
                "linux/fs.h",
                "linux/genetlink.h",
                "linux/if_alg.h",
@@ -2353,6 +2354,7 @@ fn test_linux(target: &str) {
     headers! {
         cfg:
         "linux/falloc.h",
+        "linux/futex.h",
         "linux/fs.h",
         "linux/genetlink.h",
         "linux/if_alg.h",

src/unix/notbsd/android/mod.rs

@@ -1839,6 +1839,25 @@ pub const IN_ALL_EVENTS:    ::uint32_t = (
 pub const IN_CLOEXEC: ::c_int = O_CLOEXEC;
 pub const IN_NONBLOCK: ::c_int = O_NONBLOCK;
 
+pub const FUTEX_WAIT: ::c_int = 0;
+pub const FUTEX_WAKE: ::c_int = 1;
+pub const FUTEX_FD: ::c_int = 2;
+pub const FUTEX_REQUEUE: ::c_int = 3;
+pub const FUTEX_CMP_REQUEUE: ::c_int = 4;
+pub const FUTEX_WAKE_OP: ::c_int = 5;
+pub const FUTEX_LOCK_PI: ::c_int = 6;
+pub const FUTEX_UNLOCK_PI: ::c_int = 7;
+pub const FUTEX_TRYLOCK_PI: ::c_int = 8;
+pub const FUTEX_WAIT_BITSET: ::c_int = 9;
+pub const FUTEX_WAKE_BITSET: ::c_int = 10;
+pub const FUTEX_WAIT_REQUEUE_PI: ::c_int = 11;
+pub const FUTEX_CMP_REQUEUE_PI: ::c_int = 12;
+
+pub const FUTEX_PRIVATE_FLAG: ::c_int = 128;
+pub const FUTEX_CLOCK_REALTIME: ::c_int = 256;
+pub const FUTEX_CMD_MASK: ::c_int =
+    !(FUTEX_PRIVATE_FLAG | FUTEX_CLOCK_REALTIME);
+
 f! {
     pub fn CMSG_NXTHDR(mhdr: *const msghdr,
                        cmsg: *const cmsghdr) -> *mut cmsghdr {

src/unix/notbsd/linux/mod.rs

@@ -1849,6 +1849,25 @@ pub const IN_ALL_EVENTS:    ::uint32_t = (
 pub const IN_CLOEXEC: ::c_int = O_CLOEXEC;
 pub const IN_NONBLOCK: ::c_int = O_NONBLOCK;
 
+pub const FUTEX_WAIT: ::c_int = 0;
+pub const FUTEX_WAKE: ::c_int = 1;
+pub const FUTEX_FD: ::c_int = 2;
+pub const FUTEX_REQUEUE: ::c_int = 3;
+pub const FUTEX_CMP_REQUEUE: ::c_int = 4;
+pub const FUTEX_WAKE_OP: ::c_int = 5;
+pub const FUTEX_LOCK_PI: ::c_int = 6;
+pub const FUTEX_UNLOCK_PI: ::c_int = 7;
+pub const FUTEX_TRYLOCK_PI: ::c_int = 8;
+pub const FUTEX_WAIT_BITSET: ::c_int = 9;
+pub const FUTEX_WAKE_BITSET: ::c_int = 10;
+pub const FUTEX_WAIT_REQUEUE_PI: ::c_int = 11;
+pub const FUTEX_CMP_REQUEUE_PI: ::c_int = 12;
+
+pub const FUTEX_PRIVATE_FLAG: ::c_int = 128;
+pub const FUTEX_CLOCK_REALTIME: ::c_int = 256;
+pub const FUTEX_CMD_MASK: ::c_int =
+    !(FUTEX_PRIVATE_FLAG | FUTEX_CLOCK_REALTIME);
+
 f! {
     pub fn CMSG_NXTHDR(mhdr: *const msghdr,
                        cmsg: *const cmsghdr) -> *mut cmsghdr {