4.6.1 Basic features
wait-for
Open generic function
Summary
Blocks until a synchronization object is available.
Signature
wait-for object #key timeout => success
Arguments
- object
- An instance of
<synchronization>. - timeout
- Time-out interval. If the value is
#f(the default), the time-out interval never elapses. Otherwise the value should be a<real>, corresponding to the desired interval in seconds.
Values
- success
- An instance of
<boolean>.
Library
threads
Module
threads
Description
Blocks until a synchronization object is available.
This function is the basic blocking primitive of the Threads library. It blocks until object is available and synchronization can be achieved, or the timeout interval has expired. A non-blocking synchronization may be attempted by specifying a timeout of zero. Individual methods may adjust the state of the synchronization object on synchronization. The function returns #t if synchronization is achieved before the timeout interval elapses; otherwise it returns #f.