Refactor the pipe/eventfd abstraction
This introduces the wakeup fd interface, corresponding approximately to
the existing Google version, complete with a ported giant detailed usage
comment.
The implementation has two layers, "specialized" and "fallback". The
specialized layer is intended to be a suitable platform specific
implementation like eventfd, whereas "fallback" is probably pipe, with
runtime detection of whether the specialized version works on this
system (currently stubbed out).
diff --git a/build.json b/build.json
index f6d7f51..17187ec 100644
--- a/build.json
+++ b/build.json
@@ -47,8 +47,6 @@
"src/core/iomgr/iomgr_posix.h",
"src/core/iomgr/pollset.h",
"src/core/iomgr/pollset_kick.h",
- "src/core/iomgr/pollset_kick_posix.h",
- "src/core/iomgr/pollset_kick_eventfd.h",
"src/core/iomgr/pollset_posix.h",
"src/core/iomgr/resolve_address.h",
"src/core/iomgr/sockaddr.h",
@@ -60,6 +58,7 @@
"src/core/iomgr/tcp_posix.h",
"src/core/iomgr/tcp_server.h",
"src/core/iomgr/time_averaged_stats.h",
+ "src/core/iomgr/wakeup_fd.h",
"src/core/statistics/census_interface.h",
"src/core/statistics/census_log.h",
"src/core/statistics/census_rpc_stats.h",
@@ -124,8 +123,7 @@
"src/core/iomgr/fd_posix.c",
"src/core/iomgr/iomgr.c",
"src/core/iomgr/iomgr_posix.c",
- "src/core/iomgr/pollset_kick_posix.c",
- "src/core/iomgr/pollset_kick_eventfd.c",
+ "src/core/iomgr/pollset_kick.c",
"src/core/iomgr/pollset_multipoller_with_poll_posix.c",
"src/core/iomgr/pollset_posix.c",
"src/core/iomgr/resolve_address_posix.c",
@@ -137,6 +135,10 @@
"src/core/iomgr/tcp_posix.c",
"src/core/iomgr/tcp_server_posix.c",
"src/core/iomgr/time_averaged_stats.c",
+ "src/core/iomgr/wakeup_fd.c",
+ "src/core/iomgr/wakeup_fd_eventfd.c",
+ "src/core/iomgr/wakeup_fd_nospecial.c",
+ "src/core/iomgr/wakeup_fd_pipe.c",
"src/core/statistics/census_init.c",
"src/core/statistics/census_log.c",
"src/core/statistics/census_rpc_stats.c",