From 088906b0641e48c704c5cd529f620023616f561f Mon Sep 17 00:00:00 2001
From: Derrell Lipman <derrell@dworkin.(none)>
Date: Wed, 13 May 2009 14:31:40 -0400
Subject: [PATCH] Make the thread functions a bit easier to use

- Create separate macros for lock and unlock so that it's easier to identify
  which request is being made.

- Initialize *ponce in the SMB_THREAD_ONCE macro in the non-thread-safe case,
  rather than requiring each init function to determine if it's in the
  non-thread-safe case and manually initialize.

Derrell
---
 lib/util/smb_threads.c          |  6 +++---
 lib/util/smb_threads.h          |  2 --
 lib/util/smb_threads_internal.h | 12 +++++++++---
 3 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/lib/util/smb_threads.c b/lib/util/smb_threads.c
index ffe2eb011423..58ea2daa6756 100644
--- a/lib/util/smb_threads.c
+++ b/lib/util/smb_threads.c
@@ -43,7 +43,7 @@ void **global_lock_array;
  Mutex used for our internal "once" function
 *********************************************************/
 
-void *once_mutex = NULL;
+static void *once_mutex = NULL;
 
 
 /*********************************************************
@@ -112,7 +112,7 @@ int smb_thread_once(smb_thread_once_t *ponce,
         int ret;
 
         /* Lock our "once" mutex in order to test and initialize ponce */
-	if (SMB_THREAD_LOCK(once_mutex, SMB_THREAD_LOCK) != 0) {
+	if (SMB_THREAD_LOCK(once_mutex) != 0) {
                 smb_panic("error locking 'once'");
 	}
 
@@ -132,7 +132,7 @@ int smb_thread_once(smb_thread_once_t *ponce,
         }
 
         /* Unlock the mutex */
-	if (SMB_THREAD_LOCK(once_mutex, SMB_THREAD_UNLOCK) != 0) {
+	if (SMB_THREAD_UNLOCK(once_mutex) != 0) {
                 smb_panic("error unlocking 'once'");
 	}
         
diff --git a/lib/util/smb_threads.h b/lib/util/smb_threads.h
index 809673ab544b..9a0961677433 100644
--- a/lib/util/smb_threads.h
+++ b/lib/util/smb_threads.h
@@ -22,8 +22,6 @@
 
 typedef bool smb_thread_once_t;
 #define SMB_THREAD_ONCE_INIT false
-#define SMB_THREAD_ONCE_IS_INITIALIZED(val) ((val) == true)
-#define SMB_THREAD_ONCE_INITIALIZE(val) ((val) = true)
 
 enum smb_thread_lock_type {
 	SMB_THREAD_LOCK = 1,
diff --git a/lib/util/smb_threads_internal.h b/lib/util/smb_threads_internal.h
index 038c584b608c..afd7559f3b00 100644
--- a/lib/util/smb_threads_internal.h
+++ b/lib/util/smb_threads_internal.h
@@ -30,15 +30,21 @@
 		}; \
 	} while (0)
 
-#define SMB_THREAD_LOCK(plock, type) \
-	(global_tfp ? global_tfp->lock_mutex((plock), (type), __location__) : 0)
+#define SMB_THREAD_LOCK_INTERNAL(plock, type, location) \
+	(global_tfp ? global_tfp->lock_mutex((plock), (type), location) : 0)
+
+#define SMB_THREAD_LOCK(plock) \
+        SMB_THREAD_LOCK_INTERNAL(plock, SMB_THREAD_LOCK, __location__)
+
+#define SMB_THREAD_UNLOCK(plock) \
+        SMB_THREAD_LOCK_INTERNAL(plock, SMB_THREAD_UNLOCK, __location__)
 
 #define SMB_THREAD_ONCE(ponce, init_fn, pdata)                  \
         (global_tfp                                             \
          ? (! *(ponce)                                          \
             ? smb_thread_once((ponce), (init_fn), (pdata))      \
             : 0)                                                \
-         : ((init_fn(pdata)), 0))
+         : ((init_fn(pdata)), *(ponce) = true, 1))
 
 #define SMB_THREAD_CREATE_TLS(keyname, key) \
 	(global_tfp ? global_tfp->create_tls((keyname), &(key), __location__) : 0)
-- 
2.34.1