1 files changed, 31 insertions, 0 deletions

diff --git a/allocator.h b/allocator.h
new file mode 100644
index 0000000..3cff385
--- /dev/null
+++ b/allocator.h
@@ -0,0 +1,31 @@
+#ifndef ITS1_ALLOCATOR_H_INCLUDED
+#define ITS1_ALLOCATOR_H_INCLUDED
+
+struct its1_allocator {
+        void    *(*allocate)(struct its1_allocator *allocator, size_t n);
+        void     (*deallocate)(struct its1_allocator *allocator, void *ptr);
+};
+
+extern struct its1_allocator its1_default_allocator;
+
+/* allocator interface */
+void    *its1_malloc(struct its1_allocator *allocator, size_t n);
+void     its1_free(struct its1_allocator *allocator, void *ptr);
+
+/* helper functions */
+char    *its1_strdup(struct its1_allocator *allocator, const char *str);
+void    *its1_malloc_zero(struct its1_allocator *allocator, size_t n);
+
+#define ALLOCATE(n) \
+        its1_malloc(&its1_default_allocator, (n))
+
+#define ALLOCATE_ZERO(n) \
+        its1_malloc_zero(&its1_default_allocator, (n))
+
+#define FREE(ptr) \
+        (its1_free(&its1_default_allocator, (ptr)), (ptr) = NULL)
+
+#define  NEW(ptr) ((ptr) = ALLOCATE(sizeof *(ptr)))
+#define NEW0(ptr) ((ptr) = ALLOCATE_ZERO(sizeof *(ptr)))
+
+#endif