From bd09343fcad694128b559da0ce4c6e383eb29d93 Mon Sep 17 00:00:00 2001
From: Mark McCaskey <mark@wasmer.io>
Date: Thu, 28 Mar 2019 17:09:39 -0700
Subject: [PATCH] add structure for cross-platform wasi syscall implementations

---
 lib/wasi/src/syscalls/mod.rs        | 20 +++++++++++++-------
 lib/wasi/src/syscalls/unix/linux.rs | 19 +++++++++++++++++++
 lib/wasi/src/syscalls/unix/macos.rs | 19 +++++++++++++++++++
 lib/wasi/src/syscalls/unix/mod.rs   | 11 +++++++++++
 lib/wasi/src/syscalls/windows.rs    | 19 +++++++++++++++++++
 5 files changed, 81 insertions(+), 7 deletions(-)
 create mode 100644 lib/wasi/src/syscalls/unix/linux.rs
 create mode 100644 lib/wasi/src/syscalls/unix/macos.rs
 create mode 100644 lib/wasi/src/syscalls/unix/mod.rs
 create mode 100644 lib/wasi/src/syscalls/windows.rs

diff --git a/lib/wasi/src/syscalls/mod.rs b/lib/wasi/src/syscalls/mod.rs
index 0c5f2f9b0..077a61155 100644
--- a/lib/wasi/src/syscalls/mod.rs
+++ b/lib/wasi/src/syscalls/mod.rs
@@ -1,6 +1,19 @@
+pub mod types;
+#[cfg(any(target_os = "linux", target_os = "macos"))]
+pub mod unix;
+#[cfg(any(target_os = "windows"))]
+pub mod windows;
+
 use crate::state::WasiState;
+use types::*;
 use wasmer_runtime_core::{memory::Memory, vm::Ctx};
 
+#[cfg(any(target_os = "linux", target_os = "macos"))]
+pub use unix::*;
+
+#[cfg(any(target_os = "windows"))]
+pub use windows::*;
+
 #[allow(clippy::mut_from_ref)]
 fn get_wasi_state(ctx: &Ctx) -> &mut WasiState {
     unsafe { &mut *(ctx.data as *mut WasiState) }
@@ -59,13 +72,6 @@ pub fn args_sizes_get(ctx: &mut Ctx, argc_out: u32, argv_buf_size_out: u32) {
     memory.view::<u32>()[(argv_buf_size_out / 4) as usize].set(total_arg_size as u32);
 }
 
-pub fn clock_res_get(ctx: &mut Ctx) {
-    unimplemented!()
-}
-pub fn clock_time_get(ctx: &mut Ctx) {
-    unimplemented!()
-}
-
 /// ### `environ_get()`
 /// Read environment variable data.
 /// The sizes of the buffers should match that returned by [`environ_sizes_get()`](#environ_sizes_get).
diff --git a/lib/wasi/src/syscalls/unix/linux.rs b/lib/wasi/src/syscalls/unix/linux.rs
new file mode 100644
index 000000000..c3556faba
--- /dev/null
+++ b/lib/wasi/src/syscalls/unix/linux.rs
@@ -0,0 +1,19 @@
+use crate::syscalls::types::*;
+use wasmer_runtime_core::{memory::Memory, vm::Ctx};
+
+pub fn clock_res_get(
+    ctx: &mut Ctx,
+    clock_id: __wasi_clockid_t,
+    resolution: WasmPtr<__wasi_timestamp_t>,
+) -> __wasi_errno_t {
+    __WASI_EINVAL
+}
+
+pub fn clock_time_get(
+    ctx: &mut Ctx,
+    clock_id: __wasi_clockid_t,
+    precision: __wasi_timestamp_t,
+    time: WasmPtr<__wasi_timestamp_t>,
+) -> __wasi_errno_t {
+    unimplemented!()
+}
diff --git a/lib/wasi/src/syscalls/unix/macos.rs b/lib/wasi/src/syscalls/unix/macos.rs
new file mode 100644
index 000000000..c3556faba
--- /dev/null
+++ b/lib/wasi/src/syscalls/unix/macos.rs
@@ -0,0 +1,19 @@
+use crate::syscalls::types::*;
+use wasmer_runtime_core::{memory::Memory, vm::Ctx};
+
+pub fn clock_res_get(
+    ctx: &mut Ctx,
+    clock_id: __wasi_clockid_t,
+    resolution: WasmPtr<__wasi_timestamp_t>,
+) -> __wasi_errno_t {
+    __WASI_EINVAL
+}
+
+pub fn clock_time_get(
+    ctx: &mut Ctx,
+    clock_id: __wasi_clockid_t,
+    precision: __wasi_timestamp_t,
+    time: WasmPtr<__wasi_timestamp_t>,
+) -> __wasi_errno_t {
+    unimplemented!()
+}
diff --git a/lib/wasi/src/syscalls/unix/mod.rs b/lib/wasi/src/syscalls/unix/mod.rs
new file mode 100644
index 000000000..8fab04668
--- /dev/null
+++ b/lib/wasi/src/syscalls/unix/mod.rs
@@ -0,0 +1,11 @@
+#[cfg(target_os = "linux")]
+pub mod linux;
+
+#[cfg(target_os = "macos")]
+pub mod macos;
+
+#[cfg(target_os = "linux")]
+pub use linux::*;
+
+#[cfg(target_os = "macos")]
+pub use macos::*;
diff --git a/lib/wasi/src/syscalls/windows.rs b/lib/wasi/src/syscalls/windows.rs
new file mode 100644
index 000000000..c3556faba
--- /dev/null
+++ b/lib/wasi/src/syscalls/windows.rs
@@ -0,0 +1,19 @@
+use crate::syscalls::types::*;
+use wasmer_runtime_core::{memory::Memory, vm::Ctx};
+
+pub fn clock_res_get(
+    ctx: &mut Ctx,
+    clock_id: __wasi_clockid_t,
+    resolution: WasmPtr<__wasi_timestamp_t>,
+) -> __wasi_errno_t {
+    __WASI_EINVAL
+}
+
+pub fn clock_time_get(
+    ctx: &mut Ctx,
+    clock_id: __wasi_clockid_t,
+    precision: __wasi_timestamp_t,
+    time: WasmPtr<__wasi_timestamp_t>,
+) -> __wasi_errno_t {
+    unimplemented!()
+}