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Add static_arena_bootstrap_new

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This commit is contained in:
gingerBill
2021-10-05 16:39:14 +01:00
parent 4961aff51b
commit f83370235f
1 changed files with 24 additions and 1 deletions
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25
core/mem/virtual/static_arena.odin
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@@ -74,6 +74,29 @@ static_arena_free_all :: proc(arena: ^Static_Arena) {
static_arena_reset_to(arena, 0)
}
static_arena_bootstrap_new_by_offset :: proc($T: typeid, offset_to_arena: uintptr, reserved: uint) -> (ptr: ^T, err: Allocator_Error) {
bootstrap: Static_Arena
bootstrap.minimum_block_size = reserved
data := static_arena_alloc(&bootstrap, size_of(T), align_of(T)) or_return
ptr = (^T)(raw_data(data))
(^Static_Arena)(uintptr(ptr) + offset_to_arena)^ = bootstrap
return
}
static_arena_bootstrap_new_by_name :: proc($T: typeid, $field_name: string, reserved: uint) -> (ptr: ^T, err: Allocator_Error) {
return static_arena_bootstrap_new_by_offset(T, offset_of_by_string(T, field_name), reserved)
}
static_arena_bootstrap_new :: proc{
static_arena_bootstrap_new_by_offset,
static_arena_bootstrap_new_by_name,
}
static_arena_allocator :: proc(arena: ^Static_Arena) -> mem.Allocator {
return mem.Allocator{static_arena_allocator_proc, arena}
}
@@ -129,7 +152,7 @@ static_arena_temp_end :: proc(temp: Static_Arena_Temp, loc := #caller_location)
static_arena_reset_to(arena, temp.used)
assert(arena.temp_count > 0, "double-use of growing_arena_temp_end", loc)
assert(arena.temp_count > 0, "double-use of static_arena_temp_end", loc)
arena.temp_count -= 1
}