Add a heap allocator

2 files changed, 13 insertions, 0 deletions

diff --git a/include/alloc.h b/include/alloc.h
index bcee92f..3074b27 100644
--- a/include/alloc.h
+++ b/include/alloc.h
@@ -22,6 +22,7 @@ typedef struct {
 
 [[nodiscard, gnu::returns_nonnull]] void *bufalloc(void *, size_t, size_t);
 [[nodiscard]] void *bufalloc_noterm(void *, size_t, size_t);
+[[nodiscard]] void *heapalloc(void *, void *, size_t, size_t);
 
 [[_mlib_pure, _mlib_inline]]
 static inline arena
diff --git a/lib/alloc/heapalloc.c b/lib/alloc/heapalloc.c
new file mode 100644
index 0000000..0a698f0
--- /dev/null
+++ b/lib/alloc/heapalloc.c
@@ -0,0 +1,12 @@
+#include <stdlib.h>
+
+#include "alloc.h"
+
+void *
+heapalloc(void *, void *ptr, size_t, size_t new)
+{
+	if (new > 0)
+		return realloc(ptr, new);
+	free(ptr);
+	return nullptr;
+}