add support of the unikernel RustyHermit (#88)

- use the crate hermit-abi as interface to the kernel
seanmonstar · Oct 30, 2019 · a8973cb · a8973cb
1 parent c3d2021
commit a8973cb
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diff --git a/Cargo.toml b/Cargo.toml
@@ -14,5 +14,8 @@ readme = "README.md"
 [dependencies]
 libc = "0.2.26"
 
+[target.'cfg(all(any(target_arch = "x86_64", target_arch = "aarch64"), target_os = "hermit"))'.dependencies]
+hermit-abi = "0.1.3"
+
 [dev-dependencies]
 doc-comment = "0.3"
diff --git a/src/lib.rs b/src/lib.rs
@@ -34,6 +34,9 @@
 #[cfg(not(windows))]
 extern crate libc;
 
+#[cfg(target_os = "hermit")]
+extern crate hermit_abi;
+
 #[cfg(test)]
 #[macro_use]
 extern crate doc_comment;
@@ -443,6 +446,11 @@ fn get_num_cpus() -> usize {
     }
 }
 
+#[cfg(target_os = "hermit")]
+fn get_num_cpus() -> usize {
+    unsafe { hermit_abi::get_processor_count() }
+}
+
 #[cfg(not(any(
     target_os = "nacl",
     target_os = "macos",
@@ -457,6 +465,7 @@ fn get_num_cpus() -> usize {
     target_os = "dragonfly",
     target_os = "netbsd",
     target_os = "haiku",
+    target_os = "hermit",
     windows,
 )))]
 fn get_num_cpus() -> usize {