DeferredGlobalLastUse in cargo::core::global_cache_tracker - Rust
Description: This is a cache of modifications that will be saved to disk all at once via the `DeferredGlobalLastUse::save` method.

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## DeferredGlobalLastUse

# Struct DeferredGlobalLastUse

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    pub struct DeferredGlobalLastUse {
        registry_keys: HashMap<InternedString, ParentId>,
        git_keys: HashMap<InternedString, ParentId>,
        registry_index_timestamps: HashMap<RegistryIndex, u64>,
        registry_crate_timestamps: HashMap<RegistryCrate, u64>,
        registry_src_timestamps: HashMap<RegistrySrc, u64>,
        git_db_timestamps: HashMap<GitDb, u64>,
        git_checkout_timestamps: HashMap<GitCheckout, u64>,
        save_err_has_warned: bool,
        now: u64,
    }

Expand description

This is a cache of modifications that will be saved to disk all at once via the `DeferredGlobalLastUse::save` method.

This is here to improve performance.

## Fields§

§`registry_keys: HashMap<InternedString, ParentId>`

Cache of registry keys, used for faster fetching.

The key is the registry name (which is its directory name) and the value is the `id` in the `registry_index` table.

§`git_keys: HashMap<InternedString, ParentId>`

Cache of git keys, used for faster fetching.

The key is the git db name (which is its directory name) and the value is the `id` in the `git_db` table.

§`registry_index_timestamps: HashMap<RegistryIndex, u64>`

New registry index entries to insert.

§`registry_crate_timestamps: HashMap<RegistryCrate, u64>`

New registry `.crate` entries to insert.

§`registry_src_timestamps: HashMap<RegistrySrc, u64>`

New registry src directory entries to insert.

§`git_db_timestamps: HashMap<GitDb, u64>`

New git db entries to insert.

§`git_checkout_timestamps: HashMap<GitCheckout, u64>`

New git checkout entries to insert.

§`save_err_has_warned: bool`

This is used so that a warning about failing to update the database is only displayed once.

§`now: u64`

The current time, used to improve performance to avoid accessing the clock hundreds of times.

## Implementations§

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### impl DeferredGlobalLastUse

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#### pub fn new() -> DeferredGlobalLastUse

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#### pub fn is_empty(&self) -> bool

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#### fn clear(&mut self)

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#### pub fn mark_registry_index_used(&mut self, registry_index: RegistryIndex)

Indicates the given `RegistryIndex` has been used right now.

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#### pub fn mark_registry_crate_used(&mut self, registry_crate: RegistryCrate)

Indicates the given `RegistryCrate` has been used right now.

Also implicitly marks the index used, too.

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#### pub fn mark_registry_src_used(&mut self, registry_src: RegistrySrc)

Indicates the given `RegistrySrc` has been used right now.

Also implicitly marks the index used, too.

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#### pub fn mark_git_checkout_used(&mut self, git_checkout: GitCheckout)

Indicates the given `GitCheckout` has been used right now.

Also implicitly marks the git db used, too.

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#### pub fn mark_registry_index_used_stamp( &mut self, registry_index: RegistryIndex, timestamp: Option<&SystemTime>, )

Indicates the given `RegistryIndex` has been used with the given time (or “now” if `None`).

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#### pub fn mark_registry_crate_used_stamp( &mut self, registry_crate: RegistryCrate, timestamp: Option<&SystemTime>, )

Indicates the given `RegistryCrate` has been used with the given time (or “now” if `None`).

Also implicitly marks the index used, too.

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#### pub fn mark_registry_src_used_stamp( &mut self, registry_src: RegistrySrc, timestamp: Option<&SystemTime>, )

Indicates the given `RegistrySrc` has been used with the given time (or “now” if `None`).

Also implicitly marks the index used, too.

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#### pub fn mark_git_checkout_used_stamp( &mut self, git_checkout: GitCheckout, timestamp: Option<&SystemTime>, )

Indicates the given `GitCheckout` has been used with the given time (or “now” if `None`).

Also implicitly marks the git db used, too.

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#### pub fn save(&mut self, tracker: &mut GlobalCacheTracker) -> CargoResult<()>

Saves all of the deferred information to the database.

This will also clear the state of `self`.

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#### pub fn save_no_error(&mut self, gctx: &GlobalContext)

Variant of `DeferredGlobalLastUse::save` that does not return an error.

This will log or display a warning to the user.

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#### fn save_with_gctx(&mut self, gctx: &GlobalContext) -> CargoResult<()>

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#### fn insert_registry_index_from_cache( &mut self, conn: &Connection, ) -> CargoResult<()>

Flushes all of the `registry_index_timestamps` to the database, clearing `registry_index_timestamps`.

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#### fn insert_git_db_from_cache(&mut self, conn: &Connection) -> CargoResult<()>

Flushes all of the `git_db_timestamps` to the database, clearing `registry_index_timestamps`.

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#### fn insert_registry_crate_from_cache( &mut self, conn: &Connection, ) -> CargoResult<()>

Flushes all of the `registry_crate_timestamps` to the database, clearing `registry_index_timestamps`.

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#### fn insert_registry_src_from_cache( &mut self, conn: &Connection, ) -> CargoResult<()>

Flushes all of the `registry_src_timestamps` to the database, clearing `registry_index_timestamps`.

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#### fn insert_git_checkout_from_cache( &mut self, conn: &Connection, ) -> CargoResult<()>

Flushes all of the `git_checkout_timestamps` to the database, clearing `registry_index_timestamps`.

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#### fn registry_id( &mut self, conn: &Connection, encoded_registry_name: InternedString, ) -> CargoResult<ParentId>

Returns the numeric ID of the registry, either fetching from the local cache, or getting it from the database.

It is an error if the registry does not exist.

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#### fn git_id( &mut self, conn: &Connection, encoded_git_name: InternedString, ) -> CargoResult<ParentId>

Returns the numeric ID of the git db, either fetching from the local cache, or getting it from the database.

It is an error if the git db does not exist.

## Trait Implementations§

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### impl Debug for DeferredGlobalLastUse

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#### fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

## Auto Trait Implementations§

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### impl Freeze for DeferredGlobalLastUse

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### impl RefUnwindSafe for DeferredGlobalLastUse

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### impl Send for DeferredGlobalLastUse

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### impl Sync for DeferredGlobalLastUse

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### impl Unpin for DeferredGlobalLastUse

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### impl UnsafeUnpin for DeferredGlobalLastUse

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### impl UnwindSafe for DeferredGlobalLastUse

## Blanket Implementations§

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### impl<T> Any for T
where T: 'static + ?Sized,

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#### fn type_id(&self) -> TypeId

Gets the `TypeId` of `self`. Read more
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where T: ?Sized,

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where F: FnOnce(&Self) -> bool,

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### impl<T> Pointable for T

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#### const ALIGN: usize

The alignment of pointer.
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#### type Init = T

The type for initializers.
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#### unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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Dereferences the given pointer. Read more
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#### type Output = T

Should always be `Self`
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where U: TryFrom<T>,

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#### type Error = <U as TryFrom<T>>::Error

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## Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain `repr(...)` attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 352 bytes