From aa1a64f35ac101f1b9ea6d1f5f0211d8e187e7b7 Mon Sep 17 00:00:00 2001
From: Ingo Weinhold <ingo_weinhold@gmx.de>
Date: Wed, 3 Sep 2008 14:51:00 +0000
Subject: [PATCH] Added [un]lock_tracing_buffer(). This allows other components
 to analyze tracing buffer entries even when not in the kernel debugger.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27302 a95241bf-73f2-0310-859d-f6bbb57e9c96
---
 headers/private/kernel/tracing.h    |  2 ++
 src/system/kernel/debug/tracing.cpp | 18 ++++++++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/headers/private/kernel/tracing.h b/headers/private/kernel/tracing.h
index d8e3fe2d90..5ae50d65e8 100644
--- a/headers/private/kernel/tracing.h
+++ b/headers/private/kernel/tracing.h
@@ -208,6 +208,8 @@ char* alloc_tracing_buffer_strcpy(const char* source, size_t maxSize,
 tracing_stack_trace* capture_tracing_stack_trace(int32 maxCount,
 			int32 skipFrames, bool userOnly);
 int dump_tracing(int argc, char** argv, WrapperTraceFilter* wrapperFilter);
+void lock_tracing_buffer();
+void unlock_tracing_buffer();
 status_t tracing_init(void);
 
 void _user_ktrace_output(const char *message);
diff --git a/src/system/kernel/debug/tracing.cpp b/src/system/kernel/debug/tracing.cpp
index b233558de3..b857676424 100644
--- a/src/system/kernel/debug/tracing.cpp
+++ b/src/system/kernel/debug/tracing.cpp
@@ -1179,6 +1179,24 @@ dump_tracing(int argc, char** argv, WrapperTraceFilter* wrapperFilter)
 }
 
 
+void
+lock_tracing_buffer()
+{
+#if ENABLE_TRACING
+	acquire_spinlock(&sLock);
+#endif
+}
+
+
+void
+unlock_tracing_buffer()
+{
+#if ENABLE_TRACING
+	release_spinlock(&sLock);
+#endif
+}
+
+
 extern "C" status_t
 tracing_init(void)
 {