From: Elad Lahav <e2lahav@gmail.com>
To: perfbook@vger.kernel.org
Cc: Elad Lahav <e2lahav@gmail.com>
Subject: [PATCH] count: Switch from GCC to C11 thread-local storage
Date: Sat, 13 Aug 2022 07:45:59 -0400 [thread overview]
Message-ID: <20220813114559.2082323-1-e2lahav@gmail.com> (raw)
Signed-off-by: Elad Lahav <e2lahav@gmail.com>
---
CodeSamples/count/count_end.c | 12 ++++++------
count/count.tex | 4 ++--
2 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/CodeSamples/count/count_end.c b/CodeSamples/count/count_end.c
index 722ad2f7..5e7b9ee1 100644
--- a/CodeSamples/count/count_end.c
+++ b/CodeSamples/count/count_end.c
@@ -1,6 +1,6 @@
/*
* count_end.c: Per-thread statistical counters that provide sum at end.
- * Uses __thread for each thread's counter.
+ * Uses _Thread_local for each thread's counter.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -23,17 +23,17 @@
#include "../api.h"
//\begin{snippet}[labelbase=ln:count:count_end:whole,commandchars=\\\@\$]
-unsigned long __thread counter = 0; //\lnlbl{var:b}
+unsigned long _Thread_local counter = 0; //\lnlbl{var:b}
unsigned long *counterp[NR_THREADS] = { NULL };
unsigned long finalcount = 0;
DEFINE_SPINLOCK(final_mutex); //\lnlbl{var:e}
-static __inline__ void inc_count(void) //\lnlbl{inc:b}
+static inline void inc_count(void) //\lnlbl{inc:b}
{
WRITE_ONCE(counter, counter + 1);
} //\lnlbl{inc:e}
-static __inline__ unsigned long read_count(void)
+static inline unsigned long read_count(void)
{
int t;
unsigned long sum;
@@ -48,7 +48,7 @@ static __inline__ unsigned long read_count(void)
}
#ifndef FCV_SNIPPET
-__inline__ void count_init(void)
+inline void count_init(void)
{
}
#endif /* FCV_SNIPPET */
@@ -73,7 +73,7 @@ void count_unregister_thread(int nthreadsexpected) //\lnlbl{unreg:b}
} //\lnlbl{unreg:e}
//\end{snippet}
-__inline__ void count_cleanup(void)
+inline void count_cleanup(void)
{
}
diff --git a/count/count.tex b/count/count.tex
index 523789e2..173b964c 100644
--- a/count/count.tex
+++ b/count/count.tex
@@ -721,8 +721,8 @@ This is the topic of the next section.
\subsection{Per-Thread-Variable-Based Implementation}
\label{sec:count:Per-Thread-Variable-Based Implementation}
-\GCC\ provides an \apig{__thread} storage class that provides
-per-thread storage.
+The C language, since C11, features a \apig{_Thread_local} storage class that
+provides per-thread storage.
This can be used as shown in
\cref{lst:count:Per-Thread Statistical Counters} (\path{count_end.c})
to implement
--
2.25.1
next reply other threads:[~2022-08-13 11:46 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-13 11:45 Elad Lahav [this message]
2022-08-13 11:49 ` [PATCH] count: Switch from GCC to C11 thread-local storage Elad Lahav
2022-08-13 23:12 ` Paul E. McKenney
2022-08-13 23:23 ` Elad Lahav
2022-08-13 23:29 ` Paul E. McKenney
2022-08-14 10:11 ` Elad Lahav
2022-08-15 3:59 ` Paul E. McKenney
2022-08-16 23:43 ` Elad Lahav
2022-08-16 23:55 ` Paul E. McKenney
2022-08-13 23:08 ` Paul E. McKenney
2022-08-13 23:12 ` Elad Lahav
2022-08-13 23:17 ` Paul E. McKenney
2022-08-17 11:02 ` Elad Lahav
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