patches for DPDK stable branches
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* [dpdk-stable] [PATCH] eal/windows: fix pthreads macros return values
@ 2021-04-10 19:54 Tal Shnaiderman
  2021-04-11 21:00 ` Dmitry Kozlyuk
                   ` (2 more replies)
  0 siblings, 3 replies; 9+ messages in thread
From: Tal Shnaiderman @ 2021-04-10 19:54 UTC (permalink / raw)
  To: dev
  Cc: thomas, pallavi.kadam, dmitry.kozliuk, navasile, dmitrym,
	david.marchand, lucp.at.work, stable

The macro definitions of the following pthread functions
return incorrect values from the inner function return code.

while pthread_barrier_init, pthread_barrier_destroy and
pthread_cancel return 0 in a case of success and non zero (errno) value
otherwise the shimming functions InitializeSynchronizationBarrier,
DeleteSynchronizationBarrier and TerminateThread return FALSE (0)
in a case of failure and TRUE(1) in a case of success.

This issue was undetected as none of the functions return codes was
checked until such check was added in commit 34cc55cce6b1 ("eal: fix
race in control thread creation") exposing the issue by failing
pthread_barrier_init and rte_eal_init on Windows as a result.

The fix aligned the return value of the 3 function with the expected
pthread API return values.

Fixes: e8428a9d89f1 ("eal/windows: add some basic functions and macros")
Fixes: 34cc55cce6b1 ("eal: fix race in control thread creation")
Cc: stable@dpdk.org

Signed-off-by: Tal Shnaiderman <talshn@nvidia.com>
---
 lib/librte_eal/windows/include/pthread.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/librte_eal/windows/include/pthread.h b/lib/librte_eal/windows/include/pthread.h
index 9aeab1fa70..1939b0121c 100644
--- a/lib/librte_eal/windows/include/pthread.h
+++ b/lib/librte_eal/windows/include/pthread.h
@@ -35,12 +35,12 @@ typedef CRITICAL_SECTION pthread_mutex_t;
 typedef SYNCHRONIZATION_BARRIER pthread_barrier_t;
 
 #define pthread_barrier_init(barrier, attr, count) \
-	InitializeSynchronizationBarrier(barrier, count, -1)
+	!InitializeSynchronizationBarrier(barrier, count, -1)
 #define pthread_barrier_wait(barrier) EnterSynchronizationBarrier(barrier, \
 	SYNCHRONIZATION_BARRIER_FLAGS_BLOCK_ONLY)
 #define pthread_barrier_destroy(barrier) \
-	DeleteSynchronizationBarrier(barrier)
-#define pthread_cancel(thread) TerminateThread((HANDLE) thread, 0)
+	!DeleteSynchronizationBarrier(barrier)
+#define pthread_cancel(thread) !TerminateThread((HANDLE) thread, 0)
 
 /* pthread function overrides */
 #define pthread_self() \
-- 
2.16.1.windows.4


^ permalink raw reply	[flat|nested] 9+ messages in thread

end of thread, other threads:[~2021-04-12 20:38 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-04-10 19:54 [dpdk-stable] [PATCH] eal/windows: fix pthreads macros return values Tal Shnaiderman
2021-04-11 21:00 ` Dmitry Kozlyuk
2021-04-12  7:59   ` Tal Shnaiderman
2021-04-12  8:25     ` Thomas Monjalon
2021-04-12 10:03     ` Dmitry Kozlyuk
2021-04-12 10:07 ` David Marchand
2021-04-12 10:26   ` Tal Shnaiderman
2021-04-12 10:37 ` [dpdk-stable] [PATCH v2] " Tal Shnaiderman
2021-04-12 20:38   ` Thomas Monjalon

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