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Make Growing_Arena reserve memory first and then commit as needed

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It just committed all at once to begin with
This commit is contained in:
gingerBill
2022-08-08 12:43:18 +01:00
parent 147848ca20
commit 0e6a8b7c72
2 changed files with 13 additions and 1 deletions
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core/mem/virtual/arena_util.odin
+5
View File
@@ -1,5 +1,10 @@
package mem_virtual package mem_virtual
arena_init :: proc{
static_arena_init,
growing_arena_init,
}
arena_temp_begin :: proc{ arena_temp_begin :: proc{
static_arena_temp_begin, static_arena_temp_begin,
growing_arena_temp_begin, growing_arena_temp_begin,
core/mem/virtual/growing_arena.odin
+8 -1
View File
@@ -13,6 +13,13 @@ Growing_Arena :: struct {
DEFAULT_MINIMUM_BLOCK_SIZE :: 1<<20 // 1 MiB should be enough DEFAULT_MINIMUM_BLOCK_SIZE :: 1<<20 // 1 MiB should be enough
growing_arena_init :: proc(arena: ^Static_Arena, reserved: uint = DEFAULT_MINIMUM_BLOCK_SIZE) -> (err: Allocator_Error) {
arena.block = memory_block_alloc(0, reserved, {}) or_return
arena.total_used = 0
arena.total_reserved = arena.block.reserved
return
}
growing_arena_alloc :: proc(arena: ^Growing_Arena, min_size: int, alignment: int) -> (data: []byte, err: Allocator_Error) { growing_arena_alloc :: proc(arena: ^Growing_Arena, min_size: int, alignment: int) -> (data: []byte, err: Allocator_Error) {
align_forward_offset :: proc "contextless" (arena: ^Growing_Arena, alignment: int) -> uint #no_bounds_check { align_forward_offset :: proc "contextless" (arena: ^Growing_Arena, alignment: int) -> uint #no_bounds_check {
alignment_offset := uint(0) alignment_offset := uint(0)
@@ -37,7 +44,7 @@ growing_arena_alloc :: proc(arena: ^Growing_Arena, min_size: int, alignment: int
block_size := max(size, arena.minimum_block_size) block_size := max(size, arena.minimum_block_size)
new_block := memory_block_alloc(block_size, block_size, {}) or_return new_block := memory_block_alloc(size, block_size, {}) or_return
new_block.prev = arena.curr_block new_block.prev = arena.curr_block
arena.curr_block = new_block arena.curr_block = new_block
arena.total_reserved += new_block.reserved arena.total_reserved += new_block.reserved