From 8a1dc97a5aaf1f245b8bbf72de0e9458d15eeb81 Mon Sep 17 00:00:00 2001
From: wolfbeast <mcwerewolf@gmail.com>
Date: Wed, 19 Jul 2017 01:24:28 +0200
Subject: Implement configuration pref for Generational Garbage Collection.

Pref: javascript.options.mem.gc_generational
This resolves #20
---
 js/src/jsapi.cpp | 11 +++++++++++
 js/src/jsapi.h   |  3 +++
 2 files changed, 14 insertions(+)

(limited to 'js')

diff --git a/js/src/jsapi.cpp b/js/src/jsapi.cpp
index a99d08951..e4e86effa 100644
--- a/js/src/jsapi.cpp
+++ b/js/src/jsapi.cpp
@@ -1410,6 +1410,17 @@ JS_SetGCParameter(JSContext* cx, JSGCParamKey key, uint32_t value)
     MOZ_ALWAYS_TRUE(cx->gc.setParameter(key, value, lock));
 }
 
+JS_PUBLIC_API(void)
+JS_SetGGCMode(JSContext* cx, bool enabled)
+{
+  // Control GGC
+  if (enabled && !cx->gc.isGenerationalGCEnabled()) {
+    cx->gc.enableGenerationalGC();
+  } else if (!enabled && cx->gc.isGenerationalGCEnabled()) {
+    cx->gc.disableGenerationalGC();
+  }
+}
+
 JS_PUBLIC_API(uint32_t)
 JS_GetGCParameter(JSContext* cx, JSGCParamKey key)
 {
diff --git a/js/src/jsapi.h b/js/src/jsapi.h
index 46aa15947..6700a6c51 100644
--- a/js/src/jsapi.h
+++ b/js/src/jsapi.h
@@ -1768,6 +1768,9 @@ typedef enum JSGCParamKey {
 extern JS_PUBLIC_API(void)
 JS_SetGCParameter(JSContext* cx, JSGCParamKey key, uint32_t value);
 
+extern JS_PUBLIC_API(void)
+JS_SetGGCMode(JSContext* cx, bool enabled);
+
 extern JS_PUBLIC_API(uint32_t)
 JS_GetGCParameter(JSContext* cx, JSGCParamKey key);
 
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