intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 43 insertions, 0 deletions

diff --git a/util/system/sys_alloc.h b/util/system/sys_alloc.h
new file mode 100644
index 0000000000..4221a28f8c
--- /dev/null
+++ b/util/system/sys_alloc.h
@@ -0,0 +1,43 @@
+#pragma once
+
+#include <util/system/compiler.h>
+
+#include <cstdlib>
+#include <new>
+
+inline void* y_allocate(size_t n) {
+    void* r = malloc(n);
+
+    if (r == nullptr) {
+        throw std::bad_alloc();
+    }
+
+    return r;
+}
+
+inline void y_deallocate(void* p) {
+    free(p);
+}
+
+/**
+ * Behavior of realloc from C++99 to C++11 changed (http://www.cplusplus.com/reference/cstdlib/realloc/).
+ *
+ * Our implementation work as C++99: if new_sz == 0 free will be called on 'p' and nullptr returned.
+ */
+inline void* y_reallocate(void* p, size_t new_sz) {
+    if (!new_sz) {
+        if (p) {
+            free(p);
+        }
+
+        return nullptr;
+    }
+
+    void* r = realloc(p, new_sz);
+
+    if (r == nullptr) {
+        throw std::bad_alloc();
+    }
+
+    return r;
+}