android add handful lock free stdio calls

Author: devnexen

libc-test/build.rs

@@ -1863,6 +1863,9 @@ fn test_android(target: &str) {
             // Added in API level 28, but some tests use level 24.
             "syncfs" => true,
 
+            // Added in API level 28, but some tests use level 24.
+            "fread_unlocked" | "fwrite_unlocked" | "fgets_unlocked" => true,
+
             _ => false,
         }
     });

libc-test/semver/android.txt

@@ -3087,6 +3087,7 @@ ff_trigger
 fgetc
 fgetpos
 fgets
+fgets_unlocked
 fgetxattr
 fileno
 flistxattr
@@ -3102,6 +3103,7 @@ fprintf
 fputc
 fputs
 fread
+fread_unlocked
 free
 freeaddrinfo
 freeifaddrs
@@ -3130,6 +3132,7 @@ ftruncate
 ftruncate64
 futimens
 fwrite
+fwrite_unlocked
 gai_strerror
 genlmsghdr
 getaddrinfo

src/unix/linux_like/android/mod.rs

@@ -3678,6 +3678,20 @@ extern "C" {
         needle: *const ::c_void,
         needlelen: ::size_t,
     ) -> *mut ::c_void;
+    pub fn fread_unlocked(
+        buf: *mut ::c_void,
+        size: ::size_t,
+        nobj: ::size_t,
+        stream: *mut ::FILE,
+    ) -> ::size_t;
+    pub fn fwrite_unlocked(
+        buf: *const ::c_void,
+        size: ::size_t,
+        nobj: ::size_t,
+        stream: *mut ::FILE,
+    ) -> ::size_t;
+    pub fn fflush_unlocked(stream: *mut ::FILE) -> ::c_int;
+    pub fn fgets_unlocked(buf: *mut ::c_char, size: ::c_int, stream: *mut ::FILE) -> *mut ::c_char;
 }
 
 cfg_if! {

src/unix/linux_like/linux/mod.rs

@@ -4764,7 +4764,7 @@ extern "C" {
         newfd: ::c_int,
     ) -> ::c_int;
     pub fn fread_unlocked(
-        ptr: *mut ::c_void,
+        buf: *mut ::c_void,
         size: ::size_t,
         nobj: ::size_t,
         stream: *mut ::FILE,