medfall

commit 73c719c4e53842ed1dfc41bc68b54d83fcbd7f0a
parent 789c540825d27df0f752831bbce2e4d8d33a1c90
Author: Michael Savage <mikejsavage@gmail.com>
Date:   Tue Sep  1 22:37:15 +0200

Add memarena_push_arena

Diffstat:
memory_arena.cc
 | 
9
+++++++++
memory_arena.h
 | 
2
++
2 files changed, 11 insertions(+), 0 deletions(-)
diff --git a/memory_arena.cc b/memory_arena.cc
@@ -18,6 +18,15 @@ u8 * memarena_push_size( MemoryArena * const arena, const size_t size, const siz
 	return arena->memory + base_index;
 }
 
+MemoryArena memarena_push_arena( MemoryArena * const arena, const size_t size ) {
+	u8 * const memory = memarena_push_size( arena, size );
+
+	MemoryArena new_arena = { };
+	memarena_init( &new_arena, memory, size );
+
+	return new_arena;
+}
+
 void memarena_clear( MemoryArena * const arena ) {
 	arena->used = 0;
 	arena->num_checkpoints = 0;
diff --git a/memory_arena.h b/memory_arena.h
@@ -22,6 +22,8 @@ u8 * memarena_push_size( MemoryArena * const arena, const size_t size, const siz
 #define memarena_push_type( arena, type, ... ) ( ( type * ) memarena_push_size( arena, sizeof( type ), ##__VA_ARGS__ ) )
 #define memarena_push_many( arena, type, count, ... ) ( ( type * ) memarena_push_size( arena, sizeof( type ) * count, ##__VA_ARGS__ ) )
 
+MemoryArena memarena_push_arena( MemoryArena * const arena, const size_t size );
+
 void memarena_clear( MemoryArena * const arena );
 
 MemoryArenaCheckpoint memarena_checkpoint( MemoryArena * const arena );