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Making a proper distinction between atom arenas and atom builders.

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ed
2026-08-11 11:25:54 -04:00
parent a2d79d65eb
commit 3f3b691ac0
9 changed files with 164 additions and 169 deletions
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code/duffle/memory.h
+6 -4
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@@ -73,9 +73,9 @@ typedef Slice_(B1);
#define slice_iter(container, iter) (T_((container).ptr) iter = (container).ptr; iter != slice_end(container); ++ iter)
#define slice_arg_from_array(type, ...) & (tmpl(Slice,type)) { .ptr = array_decl(type,__VA_ARGS__), .len = array_len( array_decl(type,__VA_ARGS__)) }
#define slice_from_array(type, array) (tmpl(Slice,type)) { .ptr = array, .len = S_(array) / S_(type) } /* .len in elements (matches S_slice/slice_arg_from_array convention) */
#define slice_from_array(type, array) (tmpl(Slice,type)) { .ptr = array, .len = S_(array) / S_(type) }
FI_ void slice_zero_(Slice s) { slice_assert(s); mem_zero(u4_(s.ptr), S_slice(s)); }
FI_ void slice_zero_(Slice s) { slice_assert(s); mem_zero(u4_(s.ptr), s.len); }
#define slice_zero(s) slice_zero_(slice_to_ut(s))
FI_ void slice_copy_(Slice dest, Slice src) {
@@ -89,6 +89,7 @@ FI_ void slice_copy_(Slice dest, Slice src) {
slice_copy_(slice_to_ut(dest), slice_to_ut(src)); \
} while(0)
typedef Slice_(U1);
typedef Slice_(U4);
#pragma endregion Slice
@@ -99,7 +100,7 @@ typedef Opt_(farena) { U4 alignment, type_width; };
typedef Struct_(FArena) { U4 start, capacity, used; };
FI_ void farena_init(FArena_R arena, Slice mem) { assert(arena != nullptr);
arena->start = u4_(mem.ptr);
arena->capacity = S_slice(mem); /* FArena.used is in BYTES; capacity must be bytes too */
arena->capacity = mem.len;
arena->used = 0;
}
FI_ FArena farena_make(Slice mem) { FArena a; farena_init(& a, mem); return a; }
@@ -116,7 +117,8 @@ FI_ void farena_rewind(FArena_R arena, U4 save_point) {
U4 end = arena->start + arena->used; assert_bounds(save_point, arena->start, end);
arena->used -= save_point - arena->start;
}
FI_ U4 farena_save(FArena arena) { return arena.used; }
FI_ U4 farena_save(FArena arena) { return arena.used; }
FI_ U4 farena_unused_start(FArena arena) { return arena.start + arena.used; }
#define farena_push_(arena, amount, ...) farena_push((arena), (amount), opt_(farena, __VA_ARGS__))
#define farena_push_type(arena, type, ...) C_(type*, farena_push((arena), 1, opt_(farena, .type_width=S_(type), __VA_ARGS__)).ptr)
#define farena_push_array(arena, type, amount, ...) (tmpl(Slice,type)){ C_(type*, farena_push((arena), (amount), opt_(farena, .type_width=S_(type), __VA_ARGS__)).ptr), (amount) }