npm install sync-primitives

• Semaphore
• Condition
• Event
• Barrier

• number [value=1]

• Object [opts]
  • boolean [blocking=true]
  • boolean [timeout=-1]

return: Promise.<boolean>

• function fn
• Object [opts]
  • boolean [blocking=true]
  • boolean [timeout=-1]

return: Promise.<[boolean, *]>

...

return: boolean

• number timeout

return: Promise.<boolean>

...

Code released under the MIT license.