; rdi - fd
pollfds__remove:
    mov rax, [pollfds_len]
    mov rsi, 0
    call pollfds__remove__loop
    mov [pollfds_len], rax
    ret

; Variables:
; rax - array length
; rdi - fd
; rsi - array index
; r11d - pollfds[rdi].fd
pollfds__remove__loop:
    cmp rsi, rax
    jge return  ; fd was not found
    mov r11d, [pollfds + rsi * pollfd_size]
    add rsi, 1
    cmp r11d, edi
    jne pollfds__remove__loop
    sub rsi, 1

; rax - array length
; rsi - array index to remove
pollfds__remove_index:
    cmp rax, 1
    jle pollfds__clear
    mov r10d, [pollfds + (rax - 1) * pollfd_size]
    mov [pollfds + rsi * pollfd_size], r10d
    sub rax, 1
    ret

; Returns new array length in rax
pollfds__clear:
    mov rax, 0
    ret