Modern Chan Channel SendFor

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SendFor

Sends a value, waiting at most ms milliseconds; returns false on a timeout.

Syntax

SendFor( byref v as T, byval ms as uint32 ) as boolean

Notes

• FALSE means the timeout expired. Like Send and TrySend, it raises on a closed channel rather than reporting one.
• The bounded middle ground between Send, which waits forever, and TrySend, which does not wait at all.
• Every blocking operation in this design takes a timeout, so a cancellable goroutine can be written to wake and check its Context.

Examples

#import "std/tasks"
using tasks

dim ch as Channel( of int32 ) = Channel( of int32 )( 1 )

dim as int32 a = 1
print ch.SendFor( a, 100 )   '' true -- room in the buffer

dim as int32 b = 2
print ch.SendFor( b, 50 )    '' false -- full, and it waited 50 ms

'' This is how a cancellable producer is written: wake regularly and
'' check whether the Context has been cancelled

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