sync



Primitives for controlling parallel routines or threads of execution.

Exec Pool

Pool Example

package concurrency

import "list"

import "strconv"

// demonstrates limiting a task to
// at most N concurrent processors
poolExample: {
	@flow(pool/exec)

	maxS: string | *"5" @tag(max)
	max:  strconv.Atoi(maxS)

	init: {
		@task(noop)

		@pool(api,2) // this is a problem, can't pass a dynamic value
	}

	for i, _ in list.Range(0, max, 1) {
		"task-\(i)": {
			// @pool(api)
			@task(nest)
			call: {
				@task(api.Call)
				req: {
					host:   "https://postman-echo.com"
					method: "GET"
					path:   "/get"
					query: {
						cow:  "moo"
						task: "\(i)"
					}
				}
				resp: string
			}
			out: {text: call.resp + "\n"} @task(os.Stdout)
			wait: {duration: "1s", dep: [call, out]} @task(os.Sleep)
		}

	}
}
2022 Hofstadter, Inc