Add deno.pid (#1464)

4 files changed, 16 insertions, 1 deletions

diff --git a/js/deno.ts b/js/deno.ts
index 2e82613e8..07068ca31 100644
--- a/js/deno.ts
+++ b/js/deno.ts
@@ -2,7 +2,7 @@
 
 // Public deno module.
 /// <amd-module name="deno"/>
-export { env, exit } from "./os";
+export { pid, env, exit } from "./os";
 export { chdir, cwd } from "./dir";
 export {
   File,
diff --git a/js/main.ts b/js/main.ts
index 818713593..9ecdefc93 100644
--- a/js/main.ts
+++ b/js/main.ts
@@ -54,6 +54,8 @@ export default function denoMain() {
     os.exit(0);
   }
 
+  os.setPid(startResMsg.pid());
+
   const cwd = startResMsg.cwd();
   log("cwd", cwd);
 
diff --git a/js/os.ts b/js/os.ts
index e56aab574..cbcd9c665 100644
--- a/js/os.ts
+++ b/js/os.ts
@@ -5,6 +5,14 @@ import * as util from "./util";
 import * as flatbuffers from "./flatbuffers";
 import { sendSync } from "./dispatch";
 
+/** process id */
+export let pid: number;
+
+export function setPid(pid_: number): void {
+  assert(!pid);
+  pid = pid_;
+}
+
 interface CodeInfo {
   moduleName: string | undefined;
   filename: string | undefined;
diff --git a/js/os_test.ts b/js/os_test.ts
index 922d86850..4b7ec4543 100644
--- a/js/os_test.ts
+++ b/js/os_test.ts
@@ -22,3 +22,8 @@ test(async function envFailure() {
 
   assert(caughtError);
 });
+
+test(function osPid() {
+  console.log("pid", deno.pid);
+  assert(deno.pid > 0);
+});