Commit Graph

6 Commits (6ab39b7bcd259a7cf4adb9331586a64698c85dcc)

Author SHA1 Message Date
Nick Hill 9a73462ea4 types/lazy: add DeferredInit type
It is sometimes necessary to defer initialization steps until the first actual usage
or until certain prerequisites have been met. For example, policy setting and
policy source registration should not occur during package initialization.
Instead, they should be deferred until the syspolicy package is actually used.
Additionally, any errors should be properly handled and reported, rather than
causing a panic within the package's init function.

In this PR, we add DeferredInit, to facilitate the registration and invocation
of deferred initialization functions.

Updates #12687

Signed-off-by: Nick Hill <mykola.khyl@gmail.com>
3 weeks ago
Nick Khyl 43375c6efb types/lazy: re-init SyncValue during test cleanup if it wasn't set before SetForTest
Updates #12687

Signed-off-by: Nick Khyl <nickk@tailscale.com>
3 months ago
Nick Khyl 5d09649b0b types/lazy: add (*SyncValue[T]).SetForTest method
It is sometimes necessary to change a global lazy.SyncValue for the duration of a test. This PR adds a (*SyncValue[T]).SetForTest method to facilitate that.

Updates #12687

Signed-off-by: Nick Khyl <nickk@tailscale.com>
3 months ago
Andrew Dunham 200d92121f types/lazy: add Peek method to SyncValue
This adds the ability to "peek" at the value of a SyncValue, so that
it's possible to observe a value without computing this.

Updates tailscale/corp#17122

Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
Co-authored-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Change-Id: I06f88c22a1f7ffcbc7ff82946335356bb0ef4622
4 months ago
Brad Fitzpatrick 7c1d6e35a5 all: use Go 1.22 range-over-int
Updates #11058

Change-Id: I35e7ef9b90e83cac04ca93fd964ad00ed5b48430
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
7 months ago
David Anderson 9e6b4d7ad8 types/lazy: helpers for lazily computed values
Co-authored-by: Maisem Ali <maisem@tailscale.com>
Co-authored-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Signed-off-by: David Anderson <danderson@tailscale.com>
2 years ago