1 files changed, 30 insertions, 0 deletions

diff --git a/src/allocator.h b/src/allocator.h
new file mode 100644
index 0000000..dd9bb16
--- /dev/null
+++ b/src/allocator.h
@@ -0,0 +1,30 @@
+#pragma once
+
+#include <stddef.h> /* size_t */
+
+struct allocator {
+        void *(*allocate)(struct allocator *allocator, size_t n);
+        void (*deallocate)(struct allocator *allocator, void *ptr);
+};
+
+extern struct allocator default_allocator;
+
+/* allocator interface */
+void *allocator_malloc(struct allocator *allocator, size_t n);
+void  allocator_free(struct allocator *allocator, void *ptr);
+
+/* helper functions */
+char *allocator_strdup(struct allocator *allocator, const char *str);
+void *allocator_malloc_zero(struct allocator *allocator, size_t n);
+
+#define ALLOCATE(n) \
+        allocator_malloc(&allocator_default_allocator, (n))
+
+#define ALLOCATE_ZERO(n) \
+        allocator_malloc_zero(&allocator_default_allocator, (n))
+
+#define FREE(ptr) \
+        (allocator_free(&allocator_default_allocator, (ptr)), (ptr) = NULL)
+
+#define NEW(ptr) ((ptr) = ALLOCATE(sizeof *(ptr)))
+#define NEW0(ptr) ((ptr) = ALLOCATE_ZERO(sizeof *(ptr)))