tree d022ed333fce0592e5b833e17e883b07418bfa68
parent a4e37a8f8232e29f89fffd6368beed6faea946a2
author Karl Wiberg <kwiberg@webrtc.org> 1525439088 +0200
committer Commit Bot <commit-bot@chromium.org> 1525684094 +0000

RTC_LOG(): Internally, pass logging severity as template argument

When the logging severity is statically known, passing it as a
template argument instead of as a function argument saves space at the
call site.

Because this is a constructor, it's not possible to pass template
arguments explicitly---they need to be deduced. So we pass a dummy
function argument whose type encodes the logging severity, and because
the dummy is an empty struct, the ABI generally specifies that this is
a no-op with no runtime cost.

In aggregate, this reduces the size of libjingle_peerconnection_so.so
by 4 kB.

Bug: webrtc:9185
Change-Id: I8118f39dc2aed3be34b2979a239fc0d3dffa969f
Reviewed-on: https://webrtc-review.googlesource.com/74582
Commit-Queue: Karl Wiberg <kwiberg@webrtc.org>
Reviewed-by: Fredrik Solenberg <solenberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23136}