Advanced Configuration and Power Interface Specification

ACPI Source Language (ASL)Reference
19.6.142 Wait (Wait for a Synchronization Event)
Syntax
Wait (SyncObject, TimeoutValue) => Boolean
Arguments
SynchObject must be an event synchronization object. TimeoutValue is evaluated as an Integer. The
calling method blocks while waiting for the event to be signaled.
Description
The pending signal count is decremented. If there is no pending signal count, the processor is
relinquished until a signal count is posted to the Event or until at least TimeoutValue milliseconds
have elapsed.
This operation returns a non-zero value if a timeout occurred and a signal was not acquired. A
TimeoutValue of 0xFFFF (or greater) indicates that there is no time out and the operation will wait
indefinitely.
19.6.143 While (Conditional Loop)
Syntax
While (Predicate) {TermList}
Arguments
Predicate is evaluated as an integer.
Description
If the Predicate is non-zero, the list of terms in TermList is executed. The operation repeats until the
Predicate evaluates to zero.
Note: Creation of a named object more than once in a given scope is not allowed. As such,
unconditionally creating named objects within a While loop must be avoided. A fatal error will be
generated on the second iteration of the loop, during the attempt to create the same named object
a second time.
19.6.144 WordBusNumber (Word Bus Number Resource Descriptor
Macro)
Syntax
WordBusNumber (ResourceUsage, IsMinFixed, IsMaxFixed, Decode, AddressGranularity,
AddressMinimum, AddressMaximum, AddressTranslation, RangeLength, ResourceSourceIndex,
ResourceSource, DescriptorName)
Arguments
ResourceUsage specifies whether the bus range is consumed by this device (ResourceConsumer)
or passed on to child devices (ResourceProducer). If nothing is specified, then ResourceConsumer
is assumed.
Version 6.0 901