Add memoryUsage()

binding.c

@@ -320,6 +320,35 @@ bare_os_resource_usage (js_env_t *env, js_callback_info_t *info) {
   return result;
 }
 
+static js_value_t *
+bare_os_memory_usage (js_env_t *env, js_callback_info_t *info) {
+  int err;
+
+  js_heap_statistics_t stats = {.version = 0};
+  err = js_get_heap_statistics(env, &stats);
+  assert(err == 0);
+
+  js_value_t *result;
+  err = js_create_object(env, &result);
+  assert(err == 0);
+
+#define V(name, property) \
+  { \
+    js_value_t *value; \
+    err = js_create_int64(env, stats.property, &value); \
+    assert(err == 0); \
+\
+    err = js_set_named_property(env, result, name, value); \
+    assert(err == 0); \
+  }
+
+  V("heapTotal", total_heap_size)
+  V("heapUsed", used_heap_size)
+#undef V
+
+  return result;
+}
+
 static js_value_t *
 bare_os_get_process_title (js_env_t *env, js_callback_info_t *info) {
   int err;
@@ -625,6 +654,7 @@ bare_os_exports (js_env_t *env, js_value_t *exports) {
   V("hostname", bare_os_hostname)
   V("kill", bare_os_kill)
   V("resourceUsage", bare_os_resource_usage)
+  V("memoryUsage", bare_os_memory_usage)
   V("getProcessTitle", bare_os_get_process_title)
   V("setProcessTitle", bare_os_set_process_title)
   V("getEnvKeys", bare_os_get_env_keys)

index.js

@@ -40,6 +40,7 @@ exports.kill = function kill (pid, signal = constants.signals.SIGTERM) {
 }
 
 exports.resourceUsage = binding.resourceUsage
+exports.memoryUsage = binding.memoryUsage
 exports.getProcessTitle = binding.getProcessTitle
 
 exports.setProcessTitle = function setProcessTitle (title) {

package.json

@@ -30,6 +30,9 @@
     "url": "https://github.com/holepunchto/bare-os/issues"
   },
   "homepage": "https://github.com/holepunchto/bare-os#readme",
+  "engines": {
+    "bare": ">=1.6.0"
+  },
   "devDependencies": {
     "brittle": "^3.1.1",
     "standard": "^17.0.0"

test.js

@@ -64,3 +64,7 @@ test('process title', (t) => {
 test('resource usage', (t) => {
   t.comment(os.resourceUsage())
 })
+
+test('memory usage', (t) => {
+  t.comment(os.memoryUsage())
+})