Fix more constness violations in serialization code#12683
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sipa merged 2 commits intobitcoin:masterfrom Mar 15, 2018
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Fix more constness violations in serialization code#12683sipa merged 2 commits intobitcoin:masterfrom
sipa merged 2 commits intobitcoin:masterfrom
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Currently, the READWRITE macro cannot be passed any non-const temporaries, as the SerReadWrite function only accepts lvalue references. Deserializing into a temporary is very common, however. See for example things like 's >> VARINT(n)'. The VARINT macro produces a temporary wrapper that holds a reference to n. Fix this by accepting non-const rvalue references instead of lvalue references. We don't propagate the rvalue-ness down, as there are no useful optimizations that only apply to temporaries. Then use this new functionality to get rid of many (but not all) uses of the 'REF' macro (which casts away constness).
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utACK 172f5fa |
eklitzke
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Mar 14, 2018
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utACK 172f5fa
I want to test this later (mostly for my own curiosity), but technically on x86 a variadic function call is not the same as std::forward. The max difference is a loss of one register (that the compiler can probably optimize away anyway).
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I have no idea what the context for this is or what you're trying to say. This PRs removes some |
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172f5fa Support deserializing into temporaries (Pieter Wuille) 2761bca Merge READWRITEMANY into READWRITE (Pieter Wuille) Pull request description: This is another fragment of improvements from #10785. The current serialization code does not support serializing/deserializing from/to temporaries (like `s >> CFlatData(script)`). As a result, there are many invocations of the `REF` macro which in addition to changing the reference type also changes the constness. This is unnecessary in C++11 as we can use rvalue references now instead. The first commit is an extra simplification we can make that removes the duplication of code between `READWRITE` and `READWRITEMANY` (and related functions). Tree-SHA512: babfa9cb268cc3bc39917e4f0a90e4651c33d85032161e16547a07f3b257b7ca7940e0cbfd69f09439d26fafbb1a6cf6359101043407e2c7aeececf7f20b6eed
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utACK 172f5fa. |
PastaPastaPasta
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Dec 16, 2020
172f5fa Support deserializing into temporaries (Pieter Wuille) 2761bca Merge READWRITEMANY into READWRITE (Pieter Wuille) Pull request description: This is another fragment of improvements from bitcoin#10785. The current serialization code does not support serializing/deserializing from/to temporaries (like `s >> CFlatData(script)`). As a result, there are many invocations of the `REF` macro which in addition to changing the reference type also changes the constness. This is unnecessary in C++11 as we can use rvalue references now instead. The first commit is an extra simplification we can make that removes the duplication of code between `READWRITE` and `READWRITEMANY` (and related functions). Tree-SHA512: babfa9cb268cc3bc39917e4f0a90e4651c33d85032161e16547a07f3b257b7ca7940e0cbfd69f09439d26fafbb1a6cf6359101043407e2c7aeececf7f20b6eed
UdjinM6
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Dec 17, 2020
172f5fa Support deserializing into temporaries (Pieter Wuille) 2761bca Merge READWRITEMANY into READWRITE (Pieter Wuille) Pull request description: This is another fragment of improvements from bitcoin#10785. The current serialization code does not support serializing/deserializing from/to temporaries (like `s >> CFlatData(script)`). As a result, there are many invocations of the `REF` macro which in addition to changing the reference type also changes the constness. This is unnecessary in C++11 as we can use rvalue references now instead. The first commit is an extra simplification we can make that removes the duplication of code between `READWRITE` and `READWRITEMANY` (and related functions). Tree-SHA512: babfa9cb268cc3bc39917e4f0a90e4651c33d85032161e16547a07f3b257b7ca7940e0cbfd69f09439d26fafbb1a6cf6359101043407e2c7aeececf7f20b6eed
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172fe15 Add missing locks and locking annotations for CAddrMan (practicalswift) 9271ace Support serialization as another type without casting (Pieter Wuille) dc37dd9 Remove unnecessary NONNEGATIVE_SIGNED (Russell Yanofsky) ddd2ab1 Add static_assert to prevent VARINT(<signed value>) (Russell Yanofsky) 539db35 Support deserializing into temporaries (Pieter Wuille) 36db7fd Merge READWRITEMANY into READWRITE (Pieter Wuille) 08ebd5b Remove old pre C++11 functions begin_ptr/end_ptr. (furszy) 9c84665 Prevent integer overflow in ReadVarInt. (Gregory Maxwell) Pull request description: Back ported some pretty concise PRs from upstream over the data serialization area. * bitcoin#9305. --> removal of pre c++11 compatibility functions. * bitcoin#9693. --> prevent integer overflow in `ReadVarInt`. * bitcoin#9753. --> compile error if VARINT is called with a signed value. * bitcoin#12683. --> fixing constness violations * bitcoin#12731. --> support for `READWRITEAS` macro. ACKs for top commit: random-zebra: ACK 172fe15 Fuzzbawls: ACK 172fe15 Tree-SHA512: 1e1e697761b885dcc1aed8a2132bed693b1c76f1f2ed22ae5c074dfb4c353b81d307f71a4c12ed71fc39fd2207c1403881bd699e32b85a167bee57b4f0946130
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This is another fragment of improvements from #10785.
The current serialization code does not support serializing/deserializing from/to temporaries (like
s >> CFlatData(script)). As a result, there are many invocations of theREFmacro which in addition to changing the reference type also changes the constness. This is unnecessary in C++11 as we can use rvalue references now instead.The first commit is an extra simplification we can make that removes the duplication of code between
READWRITEandREADWRITEMANY(and related functions).