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source dump of claude code
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1.6 kB · 56 lines
TypeScript
at main
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657type QueueItem<T extends unknown[], R> = { args: T resolve: (value: R) => void reject: (reason?: unknown) => void context: unknown}
/** * Creates a sequential execution wrapper for async functions to prevent race conditions. * Ensures that concurrent calls to the wrapped function are executed one at a time * in the order they were received, while preserving the correct return values. * * This is useful for operations that must be performed sequentially, such as * file writes or database updates that could cause conflicts if executed concurrently. * * @param fn - The async function to wrap with sequential execution * @returns A wrapped version of the function that executes calls sequentially */export function sequential<T extends unknown[], R>( fn: (...args: T) => Promise<R>,): (...args: T) => Promise<R> { const queue: QueueItem<T, R>[] = [] let processing = false
async function processQueue(): Promise<void> { if (processing) return if (queue.length === 0) return
processing = true
while (queue.length > 0) { const { args, resolve, reject, context } = queue.shift()!
try { const result = await fn.apply(context, args) resolve(result) } catch (error) { reject(error) } }
processing = false
// Check if new items were added while we were processing if (queue.length > 0) { void processQueue() } }
return function (this: unknown, ...args: T): Promise<R> { return new Promise((resolve, reject) => { queue.push({ args, resolve, reject, context: this }) void processQueue() }) }}