Advanced Configuration and Power Interface Specification

Advanced Configuration and Power Interface Specification
• AttribByte (SMBByte)
• AttribWord (SMBWord)
• AttribBlock (SMBBlock)
• AttribProcessCall (SMBProcessCall)
• AttribBlockProcessCall (SMBBlockProcessCall)
Access Attributes that require an AccessLength argument:
• AttribBytes (AccessLength)
• AttribRawBytes (AccessLength)
• AttribRawProcessBytes (AccessLength)
19.6.2 Acquire (Acquire a Mutex)
Syntax
Acquire (SyncObject, TimeoutValue) => Boolean
Arguments
SynchObject must be a mutex synchronization object. TimeoutValue is evaluated as an Integer.
Description
Ownership of the Mutex is obtained. If the Mutex is already owned by a different invocation, the
current execution thread is suspended until the owner of the Mutex releases it or until at least
TimeoutValue milliseconds have elapsed. A Mutex can be acquired more than once by the same
invocation.
Note: For Mutex objects referenced by a _DLM object, the host OS may also contend for ownership.
This operation returns True if a timeout occurred and the mutex ownership was not acquired. A
TimeoutValue of 0xFFFF (or greater) indicates that there is no timeout and the operation will wait
indefinitely.
19.6.3 Add (Integer Add)
Syntax
Add (Addend1, Addend2, Result) => Integer
Result = Addend1 + Addend2 => Integer
Result += Addend => Integer
Arguments
Addend1 and Addend2 are evaluated as Integers.
Description
The operands are added and the result is optionally stored into Result. Overflow conditions are
ignored and the result of overflows simply loses the most significant bits.
810 April, 2015 Version 6.0