From 9f02ce05909014043c797ac402bd318c73aac604 Mon Sep 17 00:00:00 2001
From: Nick Briggs <nicholas.h.briggs@gmail.com>
Date: Mon, 12 Feb 2024 09:30:46 -0800
Subject: [PATCH] Emscripten/wasm does not support getrusage() system call

Updating the MiscStats data can at best provide the time of day and
attribute all elapsed time to total CPU time.

Closes issue #1537
---
 src/timer.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/timer.c b/src/timer.c
index 08a5874..ef91303 100644
--- a/src/timer.c
+++ b/src/timer.c
@@ -118,6 +118,19 @@ void update_miscstats(void) {
   MiscStats->diskiotime = 0; /* ?? not available ?? */
   MiscStats->diskops = 0;
   MiscStats->secondstmp = MiscStats->secondsclock = (time(0) + UNIX_ALTO_TIME_DIFF);
+#elif defined(MAIKO_OS_EMSCRIPTEN)
+  /* Emscripten does not provide getrusage() functionality */
+  struct timeval timev;
+
+  MiscStats->totaltime = gettime(0) - MiscStats->starttime;
+  MiscStats->swapwaittime = 0;
+  MiscStats->pagefaults = 0;
+  MiscStats->swapwrites = 0;
+  MiscStats->diskiotime = 0;
+  MiscStats->diskops = 0;
+
+  gettimeofday(&timev, NULL);
+  MiscStats->secondstmp = MiscStats->secondsclock = (timev.tv_sec + UNIX_ALTO_TIME_DIFF);
 #else
   struct timeval timev;
   struct rusage ru;