Added deferrment API for use in preventing priority inversions inside… #1789

Job	Run time
downstream	29m 43s
linux-compat (manylinux1-x64)	1m 49s
linux-compat (manylinux1-x86)	1m 37s
linux-compat (manylinux2014-x64)	2m 10s
linux-compat (manylinux2014-x86)	1m 45s
linux-compat (raspbian-bullseye)	10m 11s
linux-compat (fedora-34-x64)	1m 34s
linux-compat (opensuse-leap)	2m 15s
linux-compat (rhel8-x64)	1m 22s
linux-compat (al2-x64)	1m 33s
linux-compiler-compat (clang-3)	2m 48s
linux-compiler-compat (clang-6)	5m 8s
linux-compiler-compat (clang-8)	4m 47s
linux-compiler-compat (clang-9)	5m 9s
linux-compiler-compat (clang-10)	2m 14s
linux-compiler-compat (clang-11)	2m 27s
linux-compiler-compat (gcc-4.8)	1m 32s
linux-compiler-compat (gcc-5)	2m 16s
linux-compiler-compat (gcc-6)	2m 14s
linux-compiler-compat (gcc-7)	1m 59s
linux-compiler-compat (gcc-8)	2m 21s
linux-compiler-compat (gcc-11)	2m 22s
clang-sanitizers (,thread)	2m 56s
clang-sanitizers (,address,undefined)	2m 25s
linux-shared-libs	1m 56s
windows	3m 43s
linux-no-cpu-extensions	1m 58s
windows-vc16 (x86)	4m 59s
windows-vc16 (x64)	3m 43s
windows-no-cpu-extensions	3m 20s
windows-shared-libs	3m 33s
windows-vc14 (x86)	2m 4s
windows-vc14 (x64)	2m 3s
windows-vc15 (x86)	4m 23s
windows-vc15 (x64)	3m 22s
Cross Compile linux-armv6	2m 44s
Cross Compile linux-armv7	2m 40s
Cross Compile linux-arm64	2m 35s
Cross Compile android-armv7	3m 36s
linux-debug	1m 38s
openbsd	15m 10s
osx	3m 3s
osx-no-cpu-extensions	7m 19s
windows-app-verifier	16m 42s
osx-debug	4m 24s
windows-debug	4m 58s
	3h 14m 30s

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