Introduces rtc_base/synchronization/mutex.h.
This change introduces a new non-reentrant mutex to WebRTC. It
enables eventual migration to Abseil's mutex.
The mutex types supportable by webrtc::Mutex are
- absl::Mutex
- CriticalSection (Windows only)
- pthread_mutex (POSIX only)
In addition to introducing the mutexes, the CL also changes
PacketBuffer to use the new mutex instead of rtc::CriticalSection.
The method of yielding from critical_section.cc was given a
mini-cleanup and YieldCurrentThread() was added to
rtc_base/synchronization/yield.h/cc.
Additionally, google_benchmark benchmarks for the mutexes were added
(test courtesy of danilchap@), and some results from a pthread/Abseil
shootout were added showing Abseil has the advantage in higher
contention.
Bug: webrtc:11567, webrtc:11634
Change-Id: Iaec324ccb32ec3851bf6db3fd290f5ea5dee4c81
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/176230
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Reviewed-by: Tommi <tommi@webrtc.org>
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#31443}
diff --git a/DEPS b/DEPS
index 686f31b..62dbba8 100644
--- a/DEPS
+++ b/DEPS
@@ -146,6 +146,9 @@
'https://chromium.googlesource.com/chromium/src/third_party/freetype2.git@62fea391fa9993f8c1d206a50080d690178ce518',
'src/third_party/harfbuzz-ng/src':
'https://chromium.googlesource.com/external/github.com/harfbuzz/harfbuzz.git@e3af529e511ca492284cdd9f4584666b88a9e00f',
+ 'src/third_party/google_benchmark/src': {
+ 'url': 'https://chromium.googlesource.com/external/github.com/google/benchmark.git@6746c65bcfa49110bfe6642b8a47735637817be4',
+ },
# WebRTC-only dependency (not present in Chromium).
'src/third_party/gtest-parallel':
'https://chromium.googlesource.com/external/github.com/google/gtest-parallel@df0b4e476f98516cea7d593e5dbb0fca44f6ee7f',
@@ -3224,6 +3227,7 @@
"+absl/algorithm/container.h",
"+absl/base/attributes.h",
"+absl/base/config.h",
+ "+absl/base/const_init.h",
"+absl/base/macros.h",
"+absl/container/inlined_vector.h",
"+absl/memory/memory.h",
