Modern Chan Wait

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Wait

Waits until the work outstanding reaches zero.

Syntax

Wait( )

Examples

#import "std/tasks"
using tasks

dim wg as WaitGroup

'' With nothing outstanding, Wait( ) returns immediately
print wg.Count( )            '' 0
wg.Wait( )
print "returned"

'' The real shape, with the Add before the spawn:
''     for i as long = 1 to 8
''         wg.Add( )
''         spawn Worker( i, @wg )     '' Worker does `defer wg->Done( )`
''     next
''     wg.Wait( )                     '' blocks until all eight are done
''
'' Wait( ) parks the calling thread rather than spinning, so waiting
'' costs no CPU.

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Library: Goroutines and Channels
Category: Goroutines and Channels
Documented under: Waitgroup