Auto merge of #3128 - stepancheg:qos-class, r=JohnTitor

Add posix_spawnattr_set_qos_class_np

https://opensource.apple.com/source/libpthread/libpthread-137.1.1/pthread/spawn.h

Author: bors

libc-test/build.rs

@@ -240,6 +240,7 @@ fn test_apple(target: &str) {
         "pthread.h",
         "pthread_spis.h",
         "pthread/introspection.h",
+        "pthread/spawn.h",
         "pthread/stack_np.h",
         "pwd.h",
         "regex.h",

libc-test/semver/apple.txt

@@ -2033,12 +2033,14 @@ posix_spawn_file_actions_destroy
 posix_spawn_file_actions_init
 posix_spawn_file_actions_t
 posix_spawnattr_destroy
+posix_spawnattr_get_qos_class_np
 posix_spawnattr_getarchpref_np
 posix_spawnattr_getflags
 posix_spawnattr_getpgroup
 posix_spawnattr_getsigdefault
 posix_spawnattr_getsigmask
 posix_spawnattr_init
+posix_spawnattr_set_qos_class_np
 posix_spawnattr_setarchpref_np
 posix_spawnattr_setflags
 posix_spawnattr_setpgroup

src/unix/bsd/apple/mod.rs

@@ -5563,6 +5563,14 @@ extern "C" {
         subpref: *mut ::cpu_subtype_t,
         ocount: *mut ::size_t,
     ) -> ::c_int;
+    pub fn posix_spawnattr_set_qos_class_np(
+        attr: *mut posix_spawnattr_t,
+        qos_class: ::qos_class_t,
+    ) -> ::c_int;
+    pub fn posix_spawnattr_get_qos_class_np(
+        attr: *const posix_spawnattr_t,
+        qos_class: *mut ::qos_class_t,
+    ) -> ::c_int;
 
     pub fn posix_spawn_file_actions_init(actions: *mut posix_spawn_file_actions_t) -> ::c_int;
     pub fn posix_spawn_file_actions_destroy(actions: *mut posix_spawn_file_actions_t) -> ::c_int;