From 56700a79868caede7809f510b81049379a5b4a12 Mon Sep 17 00:00:00 2001 From: Erin Date: Sat, 5 Nov 2022 00:39:37 +0100 Subject: [PATCH] removed sus messaging module --- kernel/src/lib.rs | 1 - kernel/src/messaging.rs | 193 ---------------------------------------- 2 files changed, 194 deletions(-) delete mode 100644 kernel/src/messaging.rs diff --git a/kernel/src/lib.rs b/kernel/src/lib.rs index 45ff7da6..8cb4d0ef 100644 --- a/kernel/src/lib.rs +++ b/kernel/src/lib.rs @@ -10,7 +10,6 @@ pub mod aalloc; pub mod allocator; pub mod arch; pub mod device_interface; -pub mod messaging; // pub mod panic; pub mod proccess; pub mod syscalls; diff --git a/kernel/src/messaging.rs b/kernel/src/messaging.rs deleted file mode 100644 index 044b28a0..00000000 --- a/kernel/src/messaging.rs +++ /dev/null @@ -1,193 +0,0 @@ -//! Interprocess communication. - -use alloc::vec::Vec; - -use crate::{proccess::PID, time::Time}; - -extern crate alloc; - -/// 131070 * 128 -pub const TINY_MESSAGE_COUNT: usize = 131070; -/// 16384 * 1024 -pub const SMALL_MESSAGE_COUNT: usize = 16384; -/// 65536 * 256 -pub const MEDIUM_MESSAGE_COUNT: usize = 256; -/// 262144 * 16 -pub const LARGE_MESSAGE_COUNT: usize = 16; -/// 16777216 * 4 -pub const HUGE_MESSAGE_COUNT: usize = 4; - -/// 128 Bytes -pub type Tiny = [u8; 128]; - -/// 1 KiB -pub type Small = [u8; 1024]; - -/// 65.536 KiB -pub type Medium = [u8; 65536]; - -/// 1MiB -pub type Large = [u8; 1048576]; - -/// 16MiB -pub type Huge = [u8; 16777216]; - -/// An internal message to be held in a process message -pub enum Message { - /// A Tiny message - /// - /// The message is 128 bytes long - Tiny(Tiny), - /// A Small message - /// - /// The message is 1 KiB long - Small(Small), - /// A Medium message - /// - /// The message is 65.536 KiB long - Medium(Medium), - /// A Large message - /// - /// The message is 1 MiB long - Large(Large), - /// A Huge message - /// - /// The message is 16 MiB long - Huge(Huge), -} - -/// A message that can be sent between processes -pub struct ProcessMessage { - /// The sender of the message - pub to_pid: PID, - /// The receiver of the message - pub from_pid: PID, - /// The message - pub message: Message, - /// The time the message was sent - pub sender_time: Time, - /// The time the message was received - pub receiver_time: Time, -} -impl ProcessMessage { - /// Return the size of the message - pub fn size(&self) -> usize { - match &self.message { - Message::Tiny(_) => 128, - Message::Small(_) => 1024, - Message::Medium(_) => 65536, - Message::Large(_) => 1048576, - Message::Huge(_) => 16777216, - } - } -} -#[derive(Debug)] -/// An enum of all possible errors that can occur when sending a message -pub enum MessagingError { - /// The message is too large to be sent - MessageTooLarge, - /// The reciever of the message is not valid - ProcessNonExistant, - /// The message Queue is full - TooManyMessages, -} - -/// A mailbox that holds messages and PipeState -pub struct Mailbox { - /// The messages in the mailbox - pub messages: Vec, - /// The count of messages in the mailbox - pub message_count: MessageCount, -} -impl Mailbox { - /// append a message to the mailbox - pub fn append(&mut self, message: ProcessMessage) -> Result<(), MessagingError> { - let msg_size = message.size(); - - if self.message_count.total() > 147730 { - return Err(MessagingError::TooManyMessages); - } - - match msg_size { - TINY_MESSAGE_COUNT => { - if self.message_count.tiny < TINY_MESSAGE_COUNT { - self.messages.push(message); - self.message_count.tiny += 1; - Ok(()) - } else { - Err(MessagingError::TooManyMessages) - } - } - SMALL_MESSAGE_COUNT => { - if self.message_count.small < SMALL_MESSAGE_COUNT { - self.messages.push(message); - self.message_count.small += 1; - Ok(()) - } else { - Err(MessagingError::TooManyMessages) - } - } - MEDIUM_MESSAGE_COUNT => { - if self.message_count.medium < MEDIUM_MESSAGE_COUNT { - self.messages.push(message); - self.message_count.medium += 1; - Ok(()) - } else { - Err(MessagingError::TooManyMessages) - } - } - LARGE_MESSAGE_COUNT => { - if self.message_count.large < LARGE_MESSAGE_COUNT { - self.messages.push(message); - self.message_count.large += 1; - Ok(()) - } else { - Err(MessagingError::TooManyMessages) - } - } - HUGE_MESSAGE_COUNT => { - if self.message_count.huge < HUGE_MESSAGE_COUNT { - self.messages.push(message); - self.message_count.huge += 1; - Ok(()) - } else { - return Err(MessagingError::TooManyMessages); - } - } - _ => Err(MessagingError::MessageTooLarge), - } - } -} - -/// A proper struct to list the number of messages in the mailbox -pub struct MessageCount { - /// The number of tiny messages in the mailbox - pub tiny: usize, - /// The number of small messages in the mailbox - pub small: usize, - /// The number of medium messages in the mailbox - pub medium: usize, - /// The number of large messages in the mailbox - pub large: usize, - /// The number of huge messages in the mailbox - pub huge: usize, -} - -impl MessageCount { - /// Return the total number of messages in the mailbox - pub fn total(&self) -> usize { - self.tiny + self.small + self.medium + self.large + self.huge - } -} - -impl Default for MessageCount { - fn default() -> Self { - MessageCount { - tiny: 0, - small: 0, - medium: 0, - large: 0, - huge: 0, - } - } -}