Add methods to enable configuration of ResourceConstraints based on limits derived at runtime.

include/v8-defaults.h

 // Copyright 2013 the V8 project authors. All rights reserved.
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+#ifndef V8_V8_DEFAULTS_H_
+#define V8_V8_DEFAULTS_H_
+
 #include "v8.h"
 
-#include "cctest.h"
-#include "cpu.h"
+/**
+ * Default configuration support for the V8 JavaScript engine.
+ */
+namespace v8 {
 
-using namespace v8::internal;
+/**
+ * Configures the constraints with reasonable default values based on the
+ * capabilities of the current device the VM is running on.
+ */
+bool V8_EXPORT ConfigureResourceConstraintsForCurrentPlatform(
+    ResourceConstraints* constraints);
 
 
-TEST(FeatureImplications) {
-  // Test for features implied by other features.
-  CPU cpu;
+/**
+ * Convience function which performs SetResourceConstraints with the settings

[Hannes Payer (out of office), 2013/09/24 11:27:17]

Convenience?

+ * returned by ConfigureResourceConstraintsForCurrentPlatform.
+ */
+bool V8_EXPORT SetDefaultResourceConstraintsForCurrentPlatform();
 
-  // ia32 and x64 features
-  CHECK(!cpu.has_sse() || cpu.has_mmx());
-  CHECK(!cpu.has_sse2() || cpu.has_sse());
-  CHECK(!cpu.has_sse3() || cpu.has_sse2());
-  CHECK(!cpu.has_ssse3() || cpu.has_sse3());
-  CHECK(!cpu.has_sse41() || cpu.has_sse3());
-  CHECK(!cpu.has_sse42() || cpu.has_sse41());
+}  // namespace v8
 
-  // arm features
-  CHECK(!cpu.has_vfp3_d32() || cpu.has_vfp3());
-}
-
-
-TEST(NumberOfProcessorsOnline) {
-  CHECK_GT(CPU::NumberOfProcessorsOnline(), 0);
-}
+#endif  // V8_V8_DEFAULTS_H_