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package objc_Foundation
import "base:intrinsics"
import "base:builtin"
import "base:runtime"
@(objc_class="NSBlock")
Block :: struct {using _: Object}
@(objc_type=Block, objc_name="createGlobal", objc_is_class_method=true)
Block_createGlobal :: proc (user_data: rawptr, user_proc: proc "c" (user_data: rawptr), allocator := context.allocator) -> (^Block, runtime.Allocator_Error) #optional_allocator_error {
return Block_createInternal(true, user_data, user_proc, allocator)
}
@(objc_type=Block, objc_name="createLocal", objc_is_class_method=true)
Block_createLocal :: proc (user_data: rawptr, user_proc: proc "c" (user_data: rawptr)) -> ^Block {
b, _ := Block_createInternal(false, user_data, user_proc, {})
return b
}
@(objc_type=Block, objc_name="createGlobalWithParam", objc_is_class_method=true)
Block_createGlobalWithParam :: proc (user_data: rawptr, user_proc: proc "c" (user_data: rawptr, t: $T), allocator := context.allocator) -> (^Block, runtime.Allocator_Error) #optional_allocator_error {
return Block_createInternalWithParam(true, user_data, user_proc, allocator)
}
@(objc_type=Block, objc_name="createLocalWithParam", objc_is_class_method=true)
Block_createLocalWithParam :: proc (user_data: rawptr, user_proc: proc "c" (user_data: rawptr, t: $T)) -> ^Block {
b, _ := Block_createInternalWithParam(false, user_data, user_proc, {})
return b
}
@(objc_type=Block, objc_name="invoke")
Block_invoke :: proc "c" (self: ^Block, args: ..any) -> ^Object {
return msgSend(^Object, self, "invoke:", ..args)
}
@(private)
Internal_Block_Literal_Base :: struct {
isa: ^intrinsics.objc_class,
flags: u32,
reserved: u32,
invoke: rawptr, // contains a pointer to a proc "c" (^Internal_Block_Literal, ...)
descriptor: ^Block_Descriptor,
}
@(private)
Internal_Block_Literal :: struct {
using base: Internal_Block_Literal_Base,
// Imported Variables
user_proc: rawptr, // contains a pointer to a proc "c" (user_data: rawptr, ...)
user_data: rawptr,
}
@(private)
Block_Descriptor :: struct {
reserved: uint,
size: uint,
copy_helper: proc "c" (dst, src: rawptr),
dispose_helper: proc "c" (src: rawptr),
signature: cstring,
}
@(private)
global_block_descriptor := Block_Descriptor{
reserved = 0,
size = size_of(Internal_Block_Literal),
}
foreign import libSystem "system:System"
foreign libSystem {
_NSConcreteGlobalBlock: intrinsics.objc_class
_NSConcreteStackBlock: intrinsics.objc_class
}
@(private="file")
internal_block_literal_make :: proc (is_global: bool, user_data: rawptr, user_proc: rawptr, invoke: rawptr, allocator: runtime.Allocator) -> (b: ^Block, err: runtime.Allocator_Error) {
_init :: proc(bl: ^Internal_Block_Literal, is_global: bool, user_data: rawptr, user_proc: rawptr, invoke: rawptr) {
// Set to true on blocks that have captures (and thus are not true
// global blocks) but are known not to escape for various other
// reasons. For backward compatibility with old runtimes, whenever
// BLOCK_IS_NOESCAPE is set, BLOCK_IS_GLOBAL is set too. Copying a
// non-escaping block returns the original block and releasing such a
// block is a no-op, which is exactly how global blocks are handled.
BLOCK_IS_NOESCAPE :: (1 << 23)|BLOCK_IS_GLOBAL
BLOCK_HAS_COPY_DISPOSE :: 1 << 25
BLOCK_HAS_CTOR :: 1 << 26 // helpers have C++ code
BLOCK_IS_GLOBAL :: 1 << 28
BLOCK_HAS_STRET :: 1 << 29 // IFF BLOCK_HAS_SIGNATURE
BLOCK_HAS_SIGNATURE :: 1 << 30
bl.isa = is_global ? &_NSConcreteGlobalBlock : &_NSConcreteStackBlock
bl.flags = BLOCK_IS_GLOBAL if is_global else 0
bl.invoke = invoke
bl.descriptor = &global_block_descriptor
bl.user_proc = auto_cast user_proc
bl.user_data = user_data
}
if is_global {
bl := builtin.new (Internal_Block_Literal, allocator) or_return
_init(bl, true, user_data, user_proc, invoke)
return auto_cast bl, .None
} else {
// malloc blocks are created by calling 'copy' on a stack block
bl: Internal_Block_Literal
_init(&bl, false, user_data, user_proc, invoke)
return auto_cast copy(cast(^Copying(Block))(&bl)), .None
}
}
@(private="file")
Block_createInternal :: proc (is_global: bool, user_data: rawptr, user_proc: proc "c" (user_data: rawptr), allocator: runtime.Allocator) -> (b: ^Block, err: runtime.Allocator_Error) {
invoke :: proc "c" (bl: ^Internal_Block_Literal) {
user_proc := (proc "c" (rawptr))(bl.user_proc)
user_proc(bl.user_data)
}
return internal_block_literal_make(is_global, user_data, auto_cast user_proc, auto_cast invoke, allocator)
}
@(private="file")
Block_createInternalWithParam :: proc (is_global: bool, user_data: rawptr, user_proc: proc "c" (user_data: rawptr, t: $T), allocator: runtime.Allocator) -> (b: ^Block, err: runtime.Allocator_Error) {
invoke :: proc "c" (bl: ^Internal_Block_Literal, t: T) {
user_proc := (proc "c" (rawptr, T))(bl.user_proc)
user_proc(bl.user_data, t)
}
return internal_block_literal_make(is_global, user_data, auto_cast user_proc, auto_cast invoke, allocator)
}
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