Fix rusage and sched_param for emscripten

Author: malbarbo

src/unix/mod.rs

@@ -62,7 +62,7 @@ s! {
         pub ru_nvcsw: c_long,
         pub ru_nivcsw: c_long,
 
-        #[cfg(any(target_env = "musl"))]
+        #[cfg(any(target_env = "musl", target_os = "emscripten"))]
         __reserved: [c_long; 16],
     }
 

src/unix/notbsd/mod.rs

@@ -103,13 +103,13 @@ s! {
 
     pub struct sched_param {
         pub sched_priority: ::c_int,
-        #[cfg(any(target_env = "musl"))]
+        #[cfg(any(target_env = "musl", target_os = "emscripten"))]
         pub sched_ss_low_priority: ::c_int,
-        #[cfg(any(target_env = "musl"))]
+        #[cfg(any(target_env = "musl", target_os = "emscripten"))]
         pub sched_ss_repl_period: ::timespec,
-        #[cfg(any(target_env = "musl"))]
+        #[cfg(any(target_env = "musl", target_os = "emscripten"))]
         pub sched_ss_init_budget: ::timespec,
-        #[cfg(any(target_env = "musl"))]
+        #[cfg(any(target_env = "musl", target_os = "emscripten"))]
         pub sched_ss_max_repl: ::c_int,
     }
 
@@ -255,6 +255,10 @@ pub const RUSAGE_SELF: ::c_int = 0;
 pub const O_RDONLY: ::c_int = 0;
 pub const O_WRONLY: ::c_int = 1;
 pub const O_RDWR: ::c_int = 2;
+
+#[cfg(target_os = "emscripten")]
+pub const O_TMPFILE: ::c_int = 0o20000000;
+#[cfg(not(target_os = "emscripten"))]
 pub const O_TMPFILE: ::c_int = 0o20000000 | O_DIRECTORY;
 
 pub const SOCK_CLOEXEC: ::c_int = O_CLOEXEC;