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Add Pointer Arithmetic

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This commit is contained in:
Ginger Bill
2016-10-12 17:51:36 +01:00
parent f5318c46d1
commit f3209584a3
12 changed files with 414 additions and 173 deletions
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core/_preload.odin
+10 -8
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@@ -31,6 +31,7 @@ Type_Info :: union {
Float: struct #ordered {
size: int // in bytes
}
Any: struct #ordered {}
String: struct #ordered {}
Boolean: struct #ordered {}
Pointer: struct #ordered {
@@ -142,7 +143,7 @@ __check_context :: proc() {
c := ^__context
if c.allocator.procedure == nil {
c.allocator = __default_allocator()
c.allocator = default_allocator()
}
if c.thread_id == 0 {
c.thread_id = os.current_thread_id()
@@ -173,6 +174,7 @@ free_all :: proc() #inline {
resize :: proc(ptr: rawptr, old_size, new_size: int) -> rawptr #inline { return resize_align(ptr, old_size, new_size, DEFAULT_ALIGNMENT) }
resize_align :: proc(ptr: rawptr, old_size, new_size, alignment: int) -> rawptr #inline {
__check_context()
a := context.allocator
return a.procedure(a.data, Allocator.Mode.RESIZE, new_size, alignment, ptr, old_size, 0)
}
@@ -204,16 +206,16 @@ default_resize_align :: proc(old_memory: rawptr, old_size, new_size, alignment:
}
__default_allocator_proc :: proc(allocator_data: rawptr, mode: Allocator.Mode,
size, alignment: int,
old_memory: rawptr, old_size: int, flags: u64) -> rawptr {
default_allocator_proc :: proc(allocator_data: rawptr, mode: Allocator.Mode,
size, alignment: int,
old_memory: rawptr, old_size: int, flags: u64) -> rawptr {
using Allocator.Mode
match mode {
case ALLOC:
total_size := size + alignment + size_of(mem.AllocationHeader)
ptr := os.heap_alloc(total_size)
header := ptr as ^mem.AllocationHeader
ptr = mem.align_forward(ptr_offset(header, 1), alignment)
ptr = mem.align_forward(header+1, alignment)
mem.allocation_header_fill(header, ptr, size)
return mem.zero(ptr, size)
@@ -228,7 +230,7 @@ __default_allocator_proc :: proc(allocator_data: rawptr, mode: Allocator.Mode,
total_size := size + alignment + size_of(mem.AllocationHeader)
ptr := os.heap_resize(mem.allocation_header(old_memory), total_size)
header := ptr as ^mem.AllocationHeader
ptr = mem.align_forward(ptr_offset(header, 1), alignment)
ptr = mem.align_forward(header+1, alignment)
mem.allocation_header_fill(header, ptr, size)
return mem.zero(ptr, size)
}
@@ -236,9 +238,9 @@ __default_allocator_proc :: proc(allocator_data: rawptr, mode: Allocator.Mode,
return nil
}
__default_allocator :: proc() -> Allocator {
default_allocator :: proc() -> Allocator {
return Allocator{
procedure = __default_allocator_proc,
procedure = default_allocator_proc,
data = nil,
}
}