Add a spinlock type.
Useful for situations where we need to repeatedly trylock, not useful
for cases where we need to lock (due to spinning).
Add a variant of sync_test to test it (with the same tests we run for
gpr_mu).
Add a benchmark to bm_closure to demonstrate single threaded performance.
diff --git a/package.xml b/package.xml
index e4db6a7..d82f2e4 100644
--- a/package.xml
+++ b/package.xml
@@ -96,6 +96,7 @@
<file baseinstalldir="/" name="src/core/lib/support/env.h" role="src" />
<file baseinstalldir="/" name="src/core/lib/support/mpscq.h" role="src" />
<file baseinstalldir="/" name="src/core/lib/support/murmur_hash.h" role="src" />
+ <file baseinstalldir="/" name="src/core/lib/support/spinlock.h" role="src" />
<file baseinstalldir="/" name="src/core/lib/support/stack_lockfree.h" role="src" />
<file baseinstalldir="/" name="src/core/lib/support/string.h" role="src" />
<file baseinstalldir="/" name="src/core/lib/support/string_windows.h" role="src" />