Overhaul betxn support

* Check for BETXN support at build-time, provide options for disabling
  or requiring that it be available for build to succeed.
* Track whether or not BETXN support is enabled in the plugin-local
  state.
* Skip processing in post/internalpost callbacks if BETXN support is enabled.
* Skip work in betxnpost callbacks if BETXN support is disabled.

1 files changed, 85 insertions, 0 deletions

diff --git a/configure.ac b/configure.ac
index 66c978e..90dba52 100644
--- a/configure.ac
+++ b/configure.ac
@@ -105,6 +105,14 @@ dirsrv)
 			SLAPI_PLUGIN_INTERNAL_POST_MODIFY_FN,
 			SLAPI_PLUGIN_INTERNAL_POST_MODRDN_FN,
 			SLAPI_PLUGIN_INTERNAL_POST_DELETE_FN,
+			SLAPI_PLUGIN_BE_TXN_PRE_ADD_FN,
+			SLAPI_PLUGIN_BE_TXN_PRE_MODIFY_FN,
+			SLAPI_PLUGIN_BE_TXN_PRE_MODRDN_FN,
+			SLAPI_PLUGIN_BE_TXN_PRE_DELETE_FN,
+			SLAPI_PLUGIN_BE_TXN_POST_ADD_FN,
+			SLAPI_PLUGIN_BE_TXN_POST_MODIFY_FN,
+			SLAPI_PLUGIN_BE_TXN_POST_MODRDN_FN,
+			SLAPI_PLUGIN_BE_TXN_POST_DELETE_FN,
 			NULL]
 		       ,,,
 		       [AC_INCLUDES_DEFAULT
@@ -137,6 +145,83 @@ dirsrv)
 	;;
 esac
 
+AC_ARG_ENABLE(be-txns,
+	AS_HELP_STRING([--disable-be-txns],
+		       [build without support for backend transactions]),
+	if test x$enableval = xno ; then
+		transactions=false
+	elif test x$enableval = xyes; then
+		transactions=true
+	fi,
+	transactions=auto)
+if test x$transactions = xauto ; then
+	AC_MSG_CHECKING([for transaction support])
+	transactions=false
+	if test x$ac_cv_have_decl_SLAPI_PLUGIN_BE_TXN_PRE_ADD_FN = xyes; then
+	if test x$ac_cv_have_decl_SLAPI_PLUGIN_BE_TXN_PRE_MODIFY_FN = xyes; then
+	if test x$ac_cv_have_decl_SLAPI_PLUGIN_BE_TXN_PRE_MODRDN_FN = xyes; then
+	if test x$ac_cv_have_decl_SLAPI_PLUGIN_BE_TXN_PRE_DELETE_FN = xyes; then
+	if test x$ac_cv_have_decl_SLAPI_PLUGIN_BE_TXN_POST_ADD_FN = xyes; then
+	if test x$ac_cv_have_decl_SLAPI_PLUGIN_BE_TXN_POST_MODIFY_FN = xyes; then
+	if test x$ac_cv_have_decl_SLAPI_PLUGIN_BE_TXN_POST_MODRDN_FN = xyes; then
+	if test x$ac_cv_have_decl_SLAPI_PLUGIN_BE_TXN_POST_DELETE_FN = xyes; then
+		transactions=true
+	fi
+	fi
+	fi
+	fi
+	fi
+	fi
+	fi
+	fi
+	if $transactions ; then
+		AC_MSG_RESULT([yes])
+	else
+		AC_MSG_RESULT([no])
+	fi
+else
+	if $transactions ; then
+		AC_MSG_RESULT([enabling backend transaction support])
+	else
+		AC_MSG_RESULT([disabling backend transaction support])
+	fi
+fi
+if $transactions ; then
+	AC_DEFINE(SLAPI_NIS_SUPPORT_BE_TXNS,1,
+		  [Define if support for backend transactions should be built.])
+fi
+
+AC_ARG_ENABLE(be-txns-by-default,
+	AS_HELP_STRING([--disable-be-txns-by-default],
+		       [disable use of backend transactions by default]),
+	if test x$enableval = xno ; then
+		deftransactions=0
+	elif test x$enableval = xyes ; then
+		if ! $transactions ; then
+			AC_MSG_ERROR([unable to enable transactions by default without support for them])
+		fi
+		deftransactions=1
+	else
+		deftransactions=auto
+	fi,
+	deftransactions=auto)
+if test $deftransactions = auto ; then
+	AC_MSG_CHECKING([whether or not to enable transaction support by default])
+	if $transactions ; then
+		AC_MSG_RESULT([yes])
+		deftransactions=1
+	else
+		AC_MSG_RESULT([no transaction support, so no])
+		deftransactions=0
+	fi
+elif test x$deftransactions = x0 ; then
+	AC_MSG_RESULT([disabling backend transactions by default])
+elif test x$deftransactions = x1 ; then
+	AC_MSG_RESULT([enabling backend transactions by default])
+fi
+AC_DEFINE_UNQUOTED(DEFAULT_PLUGIN_USE_BETXNS,$deftransactions,
+		   [Define non-zero if support for backend transactions should be enabled by default.])
+
 if test $thread_api = NSPR ; then
 	AC_DEFINE(USE_NSPR_THREADS,1,[Define to use NSPR threading functions.])
 elif test $thread_api = POSIX ; then