94 lines
1.7 KiB
NASM
94 lines
1.7 KiB
NASM
; event system routines
|
|
|
|
const event_stack: 0x01FFFFFC ; pre-decremented
|
|
const event_stack_pointer: 0x01FFFFFC
|
|
|
|
; event types
|
|
const mouse_click_event_type: 0x00000000
|
|
const menu_bar_click_event_type: 0x00000001
|
|
const submenu_update_event_type: 0x00000002
|
|
const submenu_click_event_type: 0x00000003
|
|
const empty_event_type: 0xFFFFFFFF
|
|
|
|
; block until an event is available
|
|
; inputs:
|
|
; none
|
|
; outputs:
|
|
; r0: event type
|
|
; r1-r5: event parameters
|
|
wait_for_event:
|
|
ise
|
|
halt
|
|
|
|
; check the event stack pointer
|
|
; if equal to 0x01FFFFFC, then the event stack is empty
|
|
cmp [event_stack_pointer], 0x01FFFFFC
|
|
ifz jmp wait_for_event
|
|
|
|
; an event is available in the event stack, pop it from the stack and return it
|
|
call pop_event
|
|
|
|
ret
|
|
|
|
; push an event to the event stack
|
|
; inputs:
|
|
; r0: event type
|
|
; r1-r5: event parameters
|
|
; outputs:
|
|
; none
|
|
push_event:
|
|
icl
|
|
push r6
|
|
mov r6, rsp
|
|
mov rsp, [event_stack_pointer]
|
|
push r0
|
|
push r1
|
|
push r2
|
|
push r3
|
|
push r4
|
|
push r5
|
|
mov [event_stack_pointer], rsp
|
|
mov rsp, r6
|
|
pop r6
|
|
ise
|
|
|
|
ret
|
|
|
|
; pop an event from the event stack
|
|
; inputs:
|
|
; none
|
|
; outputs:
|
|
; r0: event type
|
|
; r1-r5: event parameters
|
|
pop_event:
|
|
; check the event stack pointer
|
|
; if equal to 0x01FFFFFC, then the event stack is empty
|
|
cmp [event_stack_pointer], 0x01FFFFFC
|
|
ifz jmp pop_event_empty
|
|
|
|
icl
|
|
push r6
|
|
mov r6, rsp
|
|
mov rsp, [event_stack_pointer]
|
|
pop r5
|
|
pop r4
|
|
pop r3
|
|
pop r2
|
|
pop r1
|
|
pop r0
|
|
mov [event_stack_pointer], rsp
|
|
mov rsp, r6
|
|
pop r6
|
|
ise
|
|
|
|
ret
|
|
pop_event_empty:
|
|
mov r0, empty_event_type
|
|
mov r1, 0
|
|
mov r2, 0
|
|
mov r3, 0
|
|
mov r4, 0
|
|
mov r5, 0
|
|
|
|
ret
|