Version 3.2.7
Disabled the original 'classic' V8 code generator. Crankshaft is now the default on all platforms.
Changed the heap profiler to use more descriptive names.
Performance and stability improvements to isolates on all platforms.
git-svn-id: http://v8.googlecode.com/svn/trunk@7491 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
diff --git a/src/platform-win32.cc b/src/platform-win32.cc
index 50a9e5b..ab03e3d 100644
--- a/src/platform-win32.cc
+++ b/src/platform-win32.cc
@@ -176,16 +176,50 @@
static Mutex* limit_mutex = NULL;
+#if defined(V8_TARGET_ARCH_IA32)
+static OS::MemCopyFunction memcopy_function = NULL;
+static Mutex* memcopy_function_mutex = OS::CreateMutex();
+// Defined in codegen-ia32.cc.
+OS::MemCopyFunction CreateMemCopyFunction();
+
+// Copy memory area to disjoint memory area.
+void OS::MemCopy(void* dest, const void* src, size_t size) {
+ if (memcopy_function == NULL) {
+ ScopedLock lock(memcopy_function_mutex);
+ if (memcopy_function == NULL) {
+ OS::MemCopyFunction temp = CreateMemCopyFunction();
+ MemoryBarrier();
+ memcopy_function = temp;
+ }
+ }
+ // Note: here we rely on dependent reads being ordered. This is true
+ // on all architectures we currently support.
+ (*memcopy_function)(dest, src, size);
+#ifdef DEBUG
+ CHECK_EQ(0, memcmp(dest, src, size));
+#endif
+}
+#endif // V8_TARGET_ARCH_IA32
#ifdef _WIN64
typedef double (*ModuloFunction)(double, double);
-
+static ModuloFunction modulo_function = NULL;
+static Mutex* modulo_function_mutex = OS::CreateMutex();
// Defined in codegen-x64.cc.
ModuloFunction CreateModuloFunction();
double modulo(double x, double y) {
- static ModuloFunction function = CreateModuloFunction();
- return function(x, y);
+ if (modulo_function == NULL) {
+ ScopedLock lock(modulo_function_mutex);
+ if (modulo_function == NULL) {
+ ModuloFunction temp = CreateModuloFunction();
+ MemoryBarrier();
+ modulo_function = temp;
+ }
+ }
+ // Note: here we rely on dependent reads being ordered. This is true
+ // on all architectures we currently support.
+ return (*modulo_function)(x, y);
}
#else // Win32