-void *(*wimlib_malloc_func) (size_t) = malloc;
-void (*wimlib_free_func) (void *) = free;
-void *(*wimlib_realloc_func)(void *, size_t) = realloc;
+static void *(*wimlib_malloc_func) (size_t) = malloc;
+static void (*wimlib_free_func) (void *) = free;
+static void *(*wimlib_realloc_func)(void *, size_t) = realloc;
+
+void *
+wimlib_malloc(size_t size)
+{
+ void *ptr = (*wimlib_malloc_func)(size);
+ if (ptr == NULL && size != 0)
+ ERROR("memory exhausted");
+ return ptr;
+}
+
+void
+wimlib_free_memory(void *ptr)
+{
+ (*wimlib_free_func)(ptr);
+}
+
+void *
+wimlib_realloc(void *ptr, size_t size)
+{
+ ptr = (*wimlib_realloc_func)(ptr, size);
+ if (ptr == NULL && size != 0)
+ ERROR("memory exhausted");
+ return ptr;
+}