Add wasm feature (#114)

* Add wasm feature

std::time panics on wasm, so we introduce a feature flag that swaps it
out with the web-time crate.

Cargo.toml

@@ -55,6 +55,7 @@ julia = ["sdp", "dep:libc", "dep:num-derive",  "serde", "faer-sparse"]
 # enable a blas/lapack source package 
 python = ["sdp", "dep:libc", "dep:pyo3", "dep:num-derive", "serde", "faer-sparse"]
 
+wasm = ["dep:web-time"]
 
 #compile with faer supernodal solver option
 faer-sparse = ["dep:faer", "dep:faer-entity"]
@@ -190,8 +191,17 @@ crate-type = ["lib","cdylib"]
 rustdoc-args = [ "--html-in-header", "./html/rustdocs-header.html" ]
 features = ["sdp","sdp-mkl"]
 
+# ------------------------------
+# wasm compatibility
+# ------------------------------
+
+[dependencies.web-time]
+optional = true
+version = "0.2.3"
 
 # ------------------------------
 # testing, benchmarking etc 
+# ------------------------------
 [dev-dependencies]
-tempfile = "3"
+tempfile = "3"
+

src/timers/timers.rs

@@ -1,6 +1,15 @@
 use std::collections::HashMap;
 use std::ops::{Deref, DerefMut};
-use std::time::{Duration, Instant};
+
+cfg_if::cfg_if! {
+    if #[cfg(feature="wasm")] {
+        use web_time::{Duration, Instant};
+    }
+    else {
+        use std::time::{Duration, Instant};
+    }
+}
+
 
 #[derive(Debug, Default)]
 struct InnerTimer {