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b23f63a064
* v2 state initialize and semantic paths * ensure build * gaz changes to ignored build files * gaz
41 lines
1.4 KiB
Go
41 lines
1.4 KiB
Go
// Package v1 defines how the beacon chain state for Ethereum
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// functions in the running beacon node, using an advanced,
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// immutable implementation of the state data structure.
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//
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// BeaconState getters may be accessed from inside or outside the package. To
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// avoid duplicating locks, we have internal and external versions of the
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// getter The external function carries out the short-circuit conditions,
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// obtains a read lock, then calls the internal function. The internal function
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// carries out the short-circuit conditions and returns the required data
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// without further locking, allowing it to be used by other package-level
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// functions that already hold a lock. Hence the functions look something
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// like this:
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//
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// func (b *BeaconState) Foo() uint64 {
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// // Short-circuit conditions.
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// if !b.hasInnerState() {
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// return 0
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// }
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//
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// // Read lock.
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// b.lock.RLock()
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// defer b.lock.RUnlock()
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//
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// // Internal getter.
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// return b.foo()
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// }
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//
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// func (b *BeaconState) foo() uint64 {
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// // Short-circuit conditions.
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// if !b.hasInnerState() {
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// return 0
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// }
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//
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// return b.state.foo
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// }
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//
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// Although it is technically possible to remove the short-circuit conditions
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// from the external function, that would require every read to obtain a lock
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// even if the data was not present, leading to potential slowdowns.
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package v1
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