WL#5363: Thread Pool Service Interface

In order to allow thread schedulers to be dynamically loaded,
it is necessary to make the following changes to the server:

- Two new service interfaces

- Modifications to InnoDB to inform the thread scheduler of state changes.

- Changes to the VIO subsystem for checking if data is available on a socket.

- Elimination of remains of the old thread pool implementation.

The two new service interfaces introduces are:

my_thread_scheduler
  A service interface to register a thread
  scheduler.

thd_wait
  A service interface to inform thread scheduler
  that the thread is about to start waiting.

In addition, the patch adds code that:

- Add a call to thd_wait for table locks in mysys
  thd_lock.c by introducing a set function that
  can be used to set a callback to be used when
  waiting on a lock and resuming from waiting.

- Calling the mysys set function from the server
  to set the callbacks correctly.

1 files changed, 3 insertions, 1 deletions

diff --git a/libservices/Makefile.am b/libservices/Makefile.am
index 642081859c1..d25c5c9680c 100644
--- a/libservices/Makefile.am
+++ b/libservices/Makefile.am
@@ -15,5 +15,7 @@
 
 AM_CPPFLAGS =		-I$(top_srcdir)/include
 pkglib_LIBRARIES =	libmysqlservices.a
-libmysqlservices_a_SOURCES =  my_snprintf_service.c thd_alloc_service.c
+libmysqlservices_a_SOURCES =	my_snprintf_service.c thd_alloc_service.c \
+				thd_wait_service.c \
+				my_thread_scheduler_service.c
 EXTRA_DIST = CMakeLists.txt