first commitHEADmaster

1 files changed, 76 insertions, 0 deletions

diff --git a/src/basic/arena.c b/src/basic/arena.c
new file mode 100644
index 0000000..8f2e17e
--- /dev/null
+++ b/src/basic/arena.c
@@ -0,0 +1,76 @@
+#include <basic/arena.h>
+#include <assert.h>
+#include <string.h>
+#include <stdlib.h>
+
+void
+arena_init(Arena *arena, u64 size)
+{
+    arena->size_used = 0;
+    arena->size_max = size;
+    arena->memory = malloc(size);
+}
+
+void
+arena_deinit(Arena *arena)
+{
+    arena->size_used = 0;
+    arena->size_max = 0;
+    free(arena->memory);
+}
+
+void
+arena_align(Arena *arena, u64 alignment)
+{
+    // @Incomplete
+}
+
+void*
+arena_push(Arena *arena, u64 size)
+{
+    void *result = arena->memory + arena->size_used;
+    arena->size_used += size;
+    assert(arena->size_used <= arena->size_max);
+    return result;
+}
+
+void
+arena_pop_to(Arena *arena, u64 pos)
+{
+    arena->size_used = pos;
+}
+
+void
+arena_pop_size(Arena *arena, u64 size)
+{
+    arena->size_used -= size;
+}
+
+void
+arena_zero(Arena *arena)
+{
+    memset(arena->memory, 0, arena->size_used);
+}
+
+void
+arena_clear(Arena *arena)
+{
+    arena->size_used = 0;
+}
+
+
+ArenaTmp
+arena_tmp_begin(Arena *arena)
+{
+    ArenaTmp tmp;
+    tmp.arena = arena;
+    tmp.pos = arena->size_used;
+    return tmp;
+}
+
+void
+arena_tmp_end(ArenaTmp tmp)
+{
+    tmp.arena->size_used = tmp.pos;
+}
+