Specifications

Operating System Routines
SMP$ACQUIRE
Otherwise SMP$ACQUIRE attempts to acquire the requested lock, allowing the
acquisition to succeed if the local processor already holds the lock or if the lock is
unowned.
If the lock is unowned, the routine increments by 1 a counter that records the
acquisition level. Each additional (or nested) acquisition of this lock by the
owning processor again increments this counter.
If the lock is owned by another processor, the local processor spin waits until the
lock is released.
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