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Make logging cost free when there is no output target (#12247)

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The logging streams now do almost no work when there is no output target for them.

For example, if LL_VERBOSE has no output targets, then `verbosestream << x` will return a StreamProxy with a null target. Any further `<<` operations applied to it will do nothing.
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paradust7 2022-05-04 11:55:01 -07:00 • committed by GitHub
parent ae7664597e
commit 0704ca0550
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GPG key ID: 4AEE18F83AFDEB23
14 changed files with 336 additions and 192 deletions
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4
src/network/socket.cpp
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@ -198,7 +198,7 @@ void UDPSocket::Send(const Address &destination, const void *data, int size)
if (socket_enable_debug_output) {
// Print packet destination and size
dstream << (int)m_handle << " -> ";
destination.print(&dstream);
destination.print(dstream);
dstream << ", size=" << size;
// Print packet contents
@ -295,7 +295,7 @@ int UDPSocket::Receive(Address &sender, void *data, int size)
if (socket_enable_debug_output) {
// Print packet sender and size
dstream << (int)m_handle << " <- ";
sender.print(&dstream);
sender.print(dstream);
dstream << ", size=" << received;
// Print packet contents