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Separate out the virtual memory allocation procedures

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`reserve`, `commit`, `reserve_and_commit`, `decommit`, `release`, `protect`
This commit is contained in:
gingerBill
2021-10-04 16:43:52 +01:00
parent a463609e4c
commit f2e78dcc0b
3 changed files with 98 additions and 50 deletions
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core/mem/virtual/arena.odin
+5 -6
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@@ -12,9 +12,8 @@ Growing_Arena :: struct {
}
DEFAULT_MINIMUM_BLOCK_SIZE :: 1024*1024 // 1 KiB should be enough
DEFAULT_PAGE_SIZE := 4096
growing_arena_alloc :: proc(arena: ^Growing_Arena, min_size: int, alignment: int) -> (data: []byte, err: mem.Allocator_Error) {
growing_arena_alloc :: proc(arena: ^Growing_Arena, min_size: int, alignment: int) -> (data: []byte, err: Allocator_Error) {
align_forward_offset :: proc(arena: ^Growing_Arena, alignment: int) -> int #no_bounds_check {
alignment_offset := 0
ptr := uintptr(arena.curr_block.base[arena.curr_block.used:])
@@ -71,7 +70,7 @@ growing_arena_free_all :: proc(arena: ^Growing_Arena) {
arena.total_used = 0
}
growing_arena_bootstrap_new_by_offset :: proc($T: typeid, offset_to_arena: uintptr, minimum_block_size := DEFAULT_MINIMUM_BLOCK_SIZE) -> (ptr: ^T, err: mem.Allocator_Error) {
growing_arena_bootstrap_new_by_offset :: proc($T: typeid, offset_to_arena: uintptr, minimum_block_size := DEFAULT_MINIMUM_BLOCK_SIZE) -> (ptr: ^T, err: Allocator_Error) {
bootstrap: Growing_Arena
bootstrap.minimum_block_size = minimum_block_size
@@ -84,7 +83,7 @@ growing_arena_bootstrap_new_by_offset :: proc($T: typeid, offset_to_arena: uintp
return
}
growing_arena_bootstrap_new_by_name :: proc($T: typeid, $field_name: string, minimum_block_size := DEFAULT_MINIMUM_BLOCK_SIZE) -> (ptr: ^T, err: mem.Allocator_Error) {
growing_arena_bootstrap_new_by_name :: proc($T: typeid, $field_name: string, minimum_block_size := DEFAULT_MINIMUM_BLOCK_SIZE) -> (ptr: ^T, err: Allocator_Error) {
return growing_arena_bootstrap_new_by_offset(T, offset_of_by_string(T, field_name), minimum_block_size)
}
growing_arena_bootstrap_new :: proc{
@@ -99,7 +98,7 @@ growing_arena_allocator :: proc(arena: ^Growing_Arena) -> mem.Allocator {
growing_arena_allocator_proc :: proc(allocator_data: rawptr, mode: mem.Allocator_Mode,
size, alignment: int,
old_memory: rawptr, old_size: int,
location := #caller_location) -> (data: []byte, err: mem.Allocator_Error) {
location := #caller_location) -> (data: []byte, err: Allocator_Error) {
arena := (^Growing_Arena)(allocator_data)
switch mode {
@@ -160,4 +159,4 @@ growing_arena_temp_end :: proc(temp: Growing_Arena_Temp, loc := #caller_location
growing_arena_check_temp :: proc(arena: ^Growing_Arena, loc := #caller_location) {
assert(arena.temp_count == 0, "Growing_Arena_Temp not been ended", loc)
}
}