Function preCheck

packages/effect/src/RequestResolver.ts:1159–1187

(entry)

        })
      },
      preCheck(entry) {
        const ocached = MutableHashMap.get(cache, entry.request)
        if (ocached._tag === "None") {
          const cached = { entry, exit: undefined as Request.Result<A> | undefined }
          MutableHashMap.set(cache, entry.request, cached)
          const prevComplete = entry.completeUnsafe
          entry.completeUnsafe = function(exit) {
            cached.exit = exit as any
            prevComplete(exit)
          }
          return true
        }
        const cached = ocached.value
        if (cached.exit) {
          if (strategy === "lru") {
            MutableHashMap.remove(cache, cached.entry.request)
            MutableHashMap.set(cache, cached.entry.request, cached)
          }
          entry.completeUnsafe(cached.exit as any)
        } else {
          cached.entry.uninterruptible = true
          const prevComplete = cached.entry.completeUnsafe
          cached.entry.completeUnsafe = function(exit) {
            prevComplete(exit)
            entry.completeUnsafe(exit)
          }
        }
        return false
      }
    })
  }))