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Add a Reader-Writer Lock

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(This is a merge of http://go/wvgerrit/70666)

We need a reader-writer lock implementation in order to make use of the
new threading guarantees in OEMCrypto v15. However, we do not have
access to an STL reader-writer lock due to only being on C++11. This
patch adds a home-grown reader-writer lock, as well as tests to verify
that its behavior is sound.

Bug: 70889998
Bug: 118584039
Test: CE CDM Unit Tests
Test: Android Unit Tests
Change-Id: Iaddcefb50e72452fbd27d04879eacf775484e675
This commit is contained in:
John W. Bruce
2019-01-29 13:41:38 -08:00
parent 19c4996b3c
commit a1b5b42d55
7 changed files with 425 additions and 0 deletions
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libwvdrmengine/Android.mk
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@@ -110,6 +110,7 @@ CORE_SRC_DIR := cdm/core/src
LOCAL_SRC_FILES := \
$(CORE_SRC_DIR)/properties.cpp \
$(UTIL_SRC_DIR)/platform.cpp \
$(UTIL_SRC_DIR)/rw_lock.cpp \
$(UTIL_SRC_DIR)/string_conversions.cpp \
$(UTIL_SRC_DIR)/clock.cpp \
$(UTIL_SRC_DIR)/file_store.cpp \