Is the aforementioned waqf, which stipulates the inheritance of males to the exclusion of females from the founder's offspring, a class-based waqf or for the participation of males in all classes?

The phrase "generation after generation" in the Waqf text necessitates a sequence, meaning that the second class is not entitled to the Waqf until the complete extinction of the preceding class. If some individuals of the first class die, the revenue is distributed among those remaining from that class until it becomes extinct. Then, the entitlement transfers to the next class from the male progeny, and this includes both males and females from that progeny if they are eligible.