moving helps to examples/util

examples/util/ispc_malloc.cpp

@@ -0,0 +1,54 @@
+#include <cstdio>
+#include <cstdlib>
+#include <iostream>
+#include <cstring>
+#include "ispc_malloc.h"
+
+#ifdef _CUDA_
+
+void * operator new(size_t size) throw(std::bad_alloc)
+{
+  void *ptr;
+  ispc_malloc(&ptr, size);
+  return ptr;
+}
+void operator delete(void *ptr) throw()
+{
+  ispc_free(ptr);
+}
+
+#else
+
+void ispc_malloc(void **ptr, const size_t size)
+{
+  *ptr = malloc(size);
+}
+void ispc_free(void *ptr)
+{
+  free(ptr);
+}
+void ispc_memset(void *ptr, int value, size_t size)
+{
+  memset(ptr, value, size);
+}
+void ispcSetMallocHeapLimit(size_t value)
+{
+}
+void ispcSetStackLimit(size_t value)
+{
+}
+unsigned long long ispcGetMallocHeapLimit()
+{
+  return -1;
+}
+unsigned long long ispcGetStackLimit()
+{
+  return -1;
+}
+void * ispcMemcpy(void *dest,  void *src,  size_t num)
+{
+  memcpy(dest, src, num);
+  return dest;
+}
+
+#endif