From db188f0ccf196a25c1343f19b45ba4940a34587e Mon Sep 17 00:00:00 2001
From: Colin Patrick McCabe <cmccabe@alumni.cmu.edu>
Date: Mon, 14 Feb 2011 04:10:17 -0800
Subject: [PATCH] dout: use DoutLocker rather than Mutex::Locker

Use DoutLocker rather than Mutex::Locker, in preparation for making the
dout_lock a plain old pthread_mutex_t.

Signed-off-by: Colin McCabe <colin.mccabe@dreamhost.com>
---
 src/common/debug.cc           |  4 ++--
 src/common/debug.h            | 13 ++++++++++++-
 src/config.cc                 |  2 +-
 src/test/TestDoutStreambuf.cc |  7 ++++---
 4 files changed, 19 insertions(+), 7 deletions(-)

diff --git a/src/common/debug.cc b/src/common/debug.cc
index fe41cce42f6c9..4b1a81ae50c8a 100644
--- a/src/common/debug.cc
+++ b/src/common/debug.cc
@@ -46,7 +46,7 @@ void _dout_open_log(bool print_version)
 
 int dout_handle_daemonize()
 {
-  Mutex::Locker l(_dout_lock);
+  DoutLocker _dout_locker;
 
   if (_dout_need_open)
        _dout_open_log(true);
@@ -58,7 +58,7 @@ int dout_handle_daemonize()
 
 int dout_create_rank_symlink(int n)
 {
-  Mutex::Locker l(_dout_lock);
+  DoutLocker _dout_locker;
 
   if (_dout_need_open)
     _dout_open_log(true);
diff --git a/src/common/debug.h b/src/common/debug.h
index cad7397339213..2768fdf179dff 100644
--- a/src/common/debug.h
+++ b/src/common/debug.h
@@ -34,6 +34,17 @@ extern int dout_handle_daemonize();
 
 extern int dout_create_rank_symlink(int n);
 
+class DoutLocker
+{
+public:
+  DoutLocker() {
+    _dout_lock.Lock();
+  }
+  ~DoutLocker() {
+    _dout_lock.Unlock();
+  }
+};
+
 static inline void _dout_begin_line(signed int prio) {
   if (unlikely(_dout_need_open))
     _dout_open_log(true);
@@ -66,7 +77,7 @@ inline std::ostream& operator<<(std::ostream& out, _bad_endl_use_dendl_t) {
   if (0) {\
     char __array[((v >= -1) && (v <= 200)) ? 0 : -1] __attribute__((unused)); \
   }\
-  Mutex::Locker _dout_locker(_dout_lock);\
+  DoutLocker __dout_locker; \
   _dout_begin_line(v); \
 
 #define dout(v) \
diff --git a/src/config.cc b/src/config.cc
index 9dea8f2403951..57adc8fabcfa2 100644
--- a/src/config.cc
+++ b/src/config.cc
@@ -1103,7 +1103,7 @@ void parse_startup_config_options(std::vector<const char*>& args,
     // In the long term, it would be best to ensure that we read ceph.conf
     // before initializing dout(). For now, just force a reopen here with the
     // configuration we have just read.
-    Mutex::Locker l(_dout_lock);
+    DoutLocker _dout_locker;
     _dout_open_log(false);
   }
 
diff --git a/src/test/TestDoutStreambuf.cc b/src/test/TestDoutStreambuf.cc
index ca6f7c58c1337..769b9b9024b37 100644
--- a/src/test/TestDoutStreambuf.cc
+++ b/src/test/TestDoutStreambuf.cc
@@ -40,9 +40,10 @@ int main(int argc, const char **argv)
 
   DoutStreambuf<char> *dos = new DoutStreambuf<char>();
 
-  _dout_lock.Lock();
-  dos->read_global_config();
-  _dout_lock.Unlock();
+  {
+    DoutLocker _dout_locker;
+    dos->read_global_config();
+  }
   derr << "using configuration: " << dos->config_to_str() << dendl;
 
   std::ostream oss(dos);
-- 
2.39.5