11 Commits (30f0fa95d931f24d6e3283ceefebc99d2c706df7)

Author	SHA1	Message	Date
Joe Tsai	d209b032ab	syncs: add Map.WithLock to allow mutations to the underlying map (#8101) ... Some operations cannot be implemented with the prior API: * Iterating over the map and deleting keys * Iterating over the map and replacing items * Calling APIs that expect a native Go map Add a Map.WithLock method that acquires a write-lock on the map and then calls a user-provided closure with the underlying Go map. This allows users to interact with the Map as a regular Go map, but with the gaurantees that it is concurrent safe. Updates tailscale/corp#9115 Signed-off-by: Joe Tsai <joetsai@digital-static.net>	5 months ago
Joe Tsai	5db80cf2d8	syncs: fix AtomicValue for interface kinds (#11943) ... If AtomicValue[T] is used with a T that is an interface kind, then Store may panic if different concret types are ever stored. Fix this by always wrapping in a concrete type. Technically, this is only needed if T is an interface kind, but there is no harm in doing it also for non-interface kinds. Updates #cleanup Signed-off-by: Joe Tsai <joetsai@digital-static.net>	7 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
Andrew Dunham	e382e4cee6	syncs: add Swap method ... To mimic sync.Map.Swap, sync/atomic.Value.Swap, etc. Updates tailscale/corp#1297 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: If7627da1bce8b552873b21d7e5ebb98904e9a650	8 months ago
Joe Tsai	674beabc73	syncs: add Map.LoadFunc (#9869) ... The LoadFunc loads a value and calls a user-provided function. The utility of this method is to ensure that the map lock is held while executing user-provided logic. This allows us to solve TOCTOU bugs that would be nearly imposible to the solve without this API. Updates tailscale/corp#14772 Signed-off-by: Joe Tsai <joetsai@digital-static.net>	1 year ago
James Tucker	498f7ec663	syncs: add Map.LoadOrInit for lazily initialized values ... I was reviewing some code that was performing this by hand, and wanted to suggest using syncs.Map, however as the code in question was allocating a non-trivial structure this would be necessary to meet the target. Updates #cleanup Signed-off-by: James Tucker <james@tailscale.com>	1 year ago
Denton Gentry	7e15c78a5a	syncs: add map.Clear() method ... Updates https://github.com/tailscale/corp/issues/13979 Signed-off-by: Denton Gentry <dgentry@tailscale.com>	1 year ago
Will Norris	71029cea2d	all: update copyright and license headers ... This updates all source files to use a new standard header for copyright and license declaration. Notably, copyright no longer includes a date, and we now use the standard SPDX-License-Identifier header. This commit was done almost entirely mechanically with perl, and then some minimal manual fixes. Updates #6865 Signed-off-by: Will Norris <will@tailscale.com>	2 years ago
Joe Tsai	9a05cdd2b5	syncs: add Map (#6260) ... Map is a concurrent safe map that is a trivial wrapper over a Go map and a sync.RWMutex. It is optimized for use-cases where the entries change often, which is the opposite use-case of what sync.Map is optimized for. The API is patterned off of sync.Map, but made generic. Signed-off-by: Joe Tsai <joetsai@digital-static.net>	2 years ago
Brad Fitzpatrick	77ec80538a	syncs: add Semaphore ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	b4d02a251a	syncs: add new package for extra sync types	5 years ago