forked from AbleOS/ableos
removed sus messaging module
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ondra05
parent
b943714093
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56700a7986
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@ -10,7 +10,6 @@ pub mod aalloc;
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pub mod allocator;
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pub mod arch;
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pub mod device_interface;
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pub mod messaging;
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// pub mod panic;
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pub mod proccess;
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pub mod syscalls;
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@ -1,193 +0,0 @@
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//! Interprocess communication.
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use alloc::vec::Vec;
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use crate::{proccess::PID, time::Time};
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extern crate alloc;
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/// 131070 * 128
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pub const TINY_MESSAGE_COUNT: usize = 131070;
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/// 16384 * 1024
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pub const SMALL_MESSAGE_COUNT: usize = 16384;
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/// 65536 * 256
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pub const MEDIUM_MESSAGE_COUNT: usize = 256;
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/// 262144 * 16
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pub const LARGE_MESSAGE_COUNT: usize = 16;
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/// 16777216 * 4
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pub const HUGE_MESSAGE_COUNT: usize = 4;
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/// 128 Bytes
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pub type Tiny = [u8; 128];
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/// 1 KiB
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pub type Small = [u8; 1024];
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/// 65.536 KiB
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pub type Medium = [u8; 65536];
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/// 1MiB
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pub type Large = [u8; 1048576];
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/// 16MiB
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pub type Huge = [u8; 16777216];
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/// An internal message to be held in a process message
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pub enum Message {
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/// A Tiny message
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///
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/// The message is 128 bytes long
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Tiny(Tiny),
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/// A Small message
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///
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/// The message is 1 KiB long
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Small(Small),
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/// A Medium message
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///
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/// The message is 65.536 KiB long
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Medium(Medium),
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/// A Large message
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///
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/// The message is 1 MiB long
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Large(Large),
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/// A Huge message
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///
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/// The message is 16 MiB long
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Huge(Huge),
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}
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/// A message that can be sent between processes
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pub struct ProcessMessage {
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/// The sender of the message
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pub to_pid: PID,
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/// The receiver of the message
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pub from_pid: PID,
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/// The message
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pub message: Message,
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/// The time the message was sent
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pub sender_time: Time,
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/// The time the message was received
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pub receiver_time: Time,
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}
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impl ProcessMessage {
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/// Return the size of the message
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pub fn size(&self) -> usize {
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match &self.message {
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Message::Tiny(_) => 128,
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Message::Small(_) => 1024,
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Message::Medium(_) => 65536,
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Message::Large(_) => 1048576,
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Message::Huge(_) => 16777216,
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}
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}
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}
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#[derive(Debug)]
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/// An enum of all possible errors that can occur when sending a message
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pub enum MessagingError {
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/// The message is too large to be sent
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MessageTooLarge,
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/// The reciever of the message is not valid
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ProcessNonExistant,
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/// The message Queue is full
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TooManyMessages,
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}
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/// A mailbox that holds messages and PipeState
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pub struct Mailbox {
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/// The messages in the mailbox
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pub messages: Vec<ProcessMessage>,
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/// The count of messages in the mailbox
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pub message_count: MessageCount,
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}
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impl Mailbox {
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/// append a message to the mailbox
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pub fn append(&mut self, message: ProcessMessage) -> Result<(), MessagingError> {
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let msg_size = message.size();
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if self.message_count.total() > 147730 {
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return Err(MessagingError::TooManyMessages);
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}
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match msg_size {
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TINY_MESSAGE_COUNT => {
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if self.message_count.tiny < TINY_MESSAGE_COUNT {
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self.messages.push(message);
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self.message_count.tiny += 1;
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Ok(())
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} else {
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Err(MessagingError::TooManyMessages)
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}
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}
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SMALL_MESSAGE_COUNT => {
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if self.message_count.small < SMALL_MESSAGE_COUNT {
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self.messages.push(message);
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self.message_count.small += 1;
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Ok(())
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} else {
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Err(MessagingError::TooManyMessages)
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}
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}
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MEDIUM_MESSAGE_COUNT => {
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if self.message_count.medium < MEDIUM_MESSAGE_COUNT {
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self.messages.push(message);
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self.message_count.medium += 1;
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Ok(())
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} else {
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Err(MessagingError::TooManyMessages)
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}
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}
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LARGE_MESSAGE_COUNT => {
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if self.message_count.large < LARGE_MESSAGE_COUNT {
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self.messages.push(message);
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self.message_count.large += 1;
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Ok(())
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} else {
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Err(MessagingError::TooManyMessages)
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}
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}
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HUGE_MESSAGE_COUNT => {
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if self.message_count.huge < HUGE_MESSAGE_COUNT {
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self.messages.push(message);
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self.message_count.huge += 1;
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Ok(())
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} else {
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return Err(MessagingError::TooManyMessages);
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}
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}
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_ => Err(MessagingError::MessageTooLarge),
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}
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}
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}
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/// A proper struct to list the number of messages in the mailbox
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pub struct MessageCount {
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/// The number of tiny messages in the mailbox
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pub tiny: usize,
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/// The number of small messages in the mailbox
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pub small: usize,
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/// The number of medium messages in the mailbox
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pub medium: usize,
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/// The number of large messages in the mailbox
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pub large: usize,
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/// The number of huge messages in the mailbox
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pub huge: usize,
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}
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impl MessageCount {
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/// Return the total number of messages in the mailbox
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pub fn total(&self) -> usize {
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self.tiny + self.small + self.medium + self.large + self.huge
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}
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}
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impl Default for MessageCount {
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fn default() -> Self {
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MessageCount {
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tiny: 0,
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small: 0,
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medium: 0,
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large: 0,
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huge: 0,
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}
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}
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}
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