Auto merge of #2998 - devnexen:memstat_fbsd_api, r=JohnTitor

freebsd subset of memstat api addition

libc-test/build.rs

@@ -1897,6 +1897,7 @@ fn test_freebsd(target: &str) {
                 "machine/elf.h",
                 "machine/reg.h",
                 "malloc_np.h",
+                "memstat.h",
                 "mqueue.h",
                 "net/bpf.h",
                 "net/if.h",
@@ -2256,6 +2257,10 @@ fn test_freebsd(target: &str) {
             // `shm_largepage_conf` was introduced in FreeBSD 13.
             "shm_largepage_conf" if Some(13) > freebsd_ver => true,
 
+            // Those are private types
+            "memory_type" => true,
+            "memory_type_list" => true,
+
             _ => false,
         }
     });

libc-test/semver/freebsd.txt

@@ -1670,6 +1670,14 @@ mallocx
 memmem
 memrchr
 memset_s
+memstat_get_name
+memstat_mtl_alloc
+memstat_mtl_find
+memstat_mtl_first
+memstat_mtl_free
+memstat_mtl_geterror
+memstat_mtl_next
+memstat_strerror
 mincore
 mkdirat
 mkfifoat

src/unix/bsd/freebsdlike/freebsd/mod.rs

@@ -998,6 +998,15 @@ s! {
         pub alloc_policy: ::c_int,
         __pad: [::c_int; 10],
     }
+
+    pub struct memory_type {
+        __priva: [::uintptr_t; 32],
+        __privb: [::uintptr_t; 26],
+    }
+
+    pub struct memory_type_list {
+        __priv: [::uintptr_t; 2],
+    }
 }
 
 s_no_extra_traits! {
@@ -4369,6 +4378,22 @@ extern "C" {
     ) -> ::c_int;
 }
 
+#[link(name = "memstat")]
+extern "C" {
+    pub fn memstat_strerror(error: ::c_int) -> *const ::c_char;
+    pub fn memstat_mtl_alloc() -> *mut memory_type_list;
+    pub fn memstat_mtl_first(list: *mut memory_type_list) -> *mut memory_type;
+    pub fn memstat_mtl_next(mtp: *mut memory_type) -> *mut memory_type;
+    pub fn memstat_mtl_find(
+        list: *mut memory_type_list,
+        allocator: ::c_int,
+        name: *const ::c_char,
+    ) -> *mut memory_type;
+    pub fn memstat_mtl_free(list: *mut memory_type_list);
+    pub fn memstat_mtl_geterror(list: *mut memory_type_list) -> ::c_int;
+    pub fn memstat_get_name(mtp: *const memory_type) -> *const ::c_char;
+}
+
 #[link(name = "kvm")]
 extern "C" {
     pub fn kvm_dpcpu_setcpu(kd: *mut ::kvm_t, cpu: ::c_uint) -> ::c_int;