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53 lines
1.1 KiB
53 lines
1.1 KiB
//! IDs used for data objects and models.
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//!
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//! UUID is always unique; the numeric ID used as a fallback
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//! is auto-incrementing, but some values may be skipped.
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//!
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//! It is better to treat both ID implementations as opaque.
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#[cfg(feature = "uuid-ids")]
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mod impl_uuid {
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/// Common identifier type
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#[allow(non_camel_case_types)]
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pub type ID = uuid::Uuid;
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pub fn next_id() -> ID {
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uuid::Uuid::new_v4()
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}
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pub fn zero_id() -> ID {
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uuid::Uuid::nil()
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}
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}
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#[cfg(not(feature = "uuid-ids"))]
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mod impl_u64 {
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/// Common identifier type
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#[allow(non_camel_case_types)]
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pub type ID = u64;
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lazy_static::lazy_static! {
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static ref COUNTER: parking_lot::Mutex<u64> = parking_lot::Mutex::new(0);
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}
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pub fn next_id() -> ID {
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let mut m = COUNTER.lock();
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let v = *m;
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*m += 1;
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v
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}
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pub fn zero_id() -> ID {
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0
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}
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}
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#[cfg(feature = "uuid-ids")]
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pub use impl_uuid::{ID, next_id, zero_id};
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#[cfg(not(feature = "uuid-ids"))]
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pub use impl_u64::{ID, next_id, zero_id};
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/// Something that has ID
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pub trait HaveId {
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fn get_id(&self) -> ID;
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}
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