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Add default_commit_size to virtual.Arena

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gingerBill
2024-03-07 12:30:34 +00:00
parent 4bb7cd5e4b
commit f9b14500be
2 changed files with 36 additions and 14 deletions
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core/mem/virtual/virtual.odin
+4 -4
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@@ -112,7 +112,7 @@ memory_block_alloc :: proc(committed, reserved: uint, alignment: uint = 0, flags
}
@(require_results)
alloc_from_memory_block :: proc(block: ^Memory_Block, min_size, alignment: uint) -> (data: []byte, err: Allocator_Error) {
alloc_from_memory_block :: proc(block: ^Memory_Block, min_size, alignment: uint, default_commit_size: uint = 0) -> (data: []byte, err: Allocator_Error) {
calc_alignment_offset :: proc "contextless" (block: ^Memory_Block, alignment: uintptr) -> uint {
alignment_offset := uint(0)
ptr := uintptr(block.base[block.used:])
@@ -123,7 +123,7 @@ alloc_from_memory_block :: proc(block: ^Memory_Block, min_size, alignment: uint)
return alignment_offset
}
do_commit_if_necessary :: proc(block: ^Memory_Block, size: uint) -> (err: Allocator_Error) {
do_commit_if_necessary :: proc(block: ^Memory_Block, size: uint, default_commit_size: uint) -> (err: Allocator_Error) {
if block.committed - block.used < size {
pmblock := (^Platform_Memory_Block)(block)
base_offset := uint(uintptr(pmblock.block.base) - uintptr(pmblock))
@@ -133,7 +133,7 @@ alloc_from_memory_block :: proc(block: ^Memory_Block, min_size, alignment: uint)
extra_size := max(size, block.committed>>1)
platform_total_commit := base_offset + block.used + extra_size
platform_total_commit = align_formula(platform_total_commit, DEFAULT_PAGE_SIZE)
platform_total_commit = min(platform_total_commit, pmblock.reserved)
platform_total_commit = min(max(platform_total_commit, default_commit_size), pmblock.reserved)
assert(pmblock.committed <= pmblock.reserved)
assert(pmblock.committed < platform_total_commit)
@@ -163,7 +163,7 @@ alloc_from_memory_block :: proc(block: ^Memory_Block, min_size, alignment: uint)
return
}
assert(block.committed <= block.reserved)
do_commit_if_necessary(block, size) or_return
do_commit_if_necessary(block, size, default_commit_size) or_return
data = block.base[block.used+alignment_offset:][:min_size]
block.used += size