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// This file is part of linux-support. It is subject to the license terms in the COPYRIGHT file found in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/linux-support/master/COPYRIGHT. No part of linux-support, including this file, may be copied, modified, propagated, or distributed except according to the terms contained in the COPYRIGHT file.
// Copyright © 2020 The developers of linux-support. See the COPYRIGHT file in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/linux-support/master/COPYRIGHT.
/// Global System V message queue configuration.
#[derive(Default, Debug, Copy, Clone, Ord, PartialOrd, Eq, PartialEq, Hash)]
#[derive(Deserialize, Serialize)]
#[serde(default, deny_unknown_fields)]
pub struct GlobalSystemVMessageQueueConfiguration
{
/// ?Does not exceed 16,777,216 (`HARD_MSGSIZEMAX`).
///
/// Default is 8,192.
/// ?Minimum is 128.
///
/// Requires root.
pub maximum_message_size: Option<NonZeroU32>,
/// Default is 32,000.
///
/// Requires root.
pub maximum_number_of_queue_identifiers: Option<NonZeroU32>,
/// Default is 16,384.
///
/// Requires root.
pub maximum_queue_size_in_bytes: Option<NonZeroU32>,
}
impl GlobalSystemVMessageQueueConfiguration
{
/// Configures.
pub fn configure(&self, proc_path: &ProcPath) -> Result<(), GlobalSystemVMessageQueueConfigurationError>
{
use self::GlobalSystemVMessageQueueConfigurationError::*;
set_value(proc_path, set_maximum_message_size, self.maximum_message_size, CouldNotChangeMaximumMessageSize)?;
set_value(proc_path, set_maximum_number_of_queue_identifiers, self.maximum_number_of_queue_identifiers, CouldNotChangeMaximumNumberOfQueueIdentifiers)?;
set_value(proc_path, set_maximum_queue_size_in_bytes, self.maximum_queue_size_in_bytes, CouldNotChangeMaximumQueueSizeInBytes)
}
}