[PATCH 01/16] lib: Add new once_define and once macros to eu-config.h

[Mark Wielaard <mark@klomp.org>]

From: Heather McIntyre <hsm2@rice.edu>

	* lib/eu-config.h New macros.
	[USE_LOCKS] (ONCE_CALL): (once_define, once)

Signed-off-by: Heather S. McIntyre <hsm2@rice.edu>
Signed-off-by: Mark Wielaard <mark@klomp.org>
---
 lib/eu-config.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/lib/eu-config.h b/lib/eu-config.h
index 78a5c4fe..feb079db 100644
--- a/lib/eu-config.h
+++ b/lib/eu-config.h
@@ -33,13 +33,18 @@
 # include <pthread.h>
 # include <assert.h>
 # define rwlock_define(class,name)	class pthread_rwlock_t name
+# define once_define(class,name)  class pthread_once_t name = PTHREAD_ONCE_INIT
 # define RWLOCK_CALL(call)		\
   ({ int _err = pthread_rwlock_ ## call; assert_perror (_err); })
+# define ONCE_CALL(call)  \
+  ({ int _err = pthread_ ## call; assert_perror (_err); })
 # define rwlock_init(lock)		RWLOCK_CALL (init (&lock, NULL))
 # define rwlock_fini(lock)		RWLOCK_CALL (destroy (&lock))
 # define rwlock_rdlock(lock)		RWLOCK_CALL (rdlock (&lock))
 # define rwlock_wrlock(lock)		RWLOCK_CALL (wrlock (&lock))
 # define rwlock_unlock(lock)		RWLOCK_CALL (unlock (&lock))
+# define once(once_control, init_routine)  \
+  ONCE_CALL (once (&once_control, init_routine))
 #else
 /* Eventually we will allow multi-threaded applications to use the
    libraries.  Therefore we will add the necessary locking although
@@ -50,6 +55,8 @@
 # define rwlock_rdlock(lock) ((void) (lock))
 # define rwlock_wrlock(lock) ((void) (lock))
 # define rwlock_unlock(lock) ((void) (lock))
+# define once_define(class,name)
+# define once(once_control, init_routine)	init_routine()
 #endif	/* USE_LOCKS */
 
 #include <libintl.h>
-- 
2.41.0