Alexandre Julliard : ntdll: Use the futex system calls on all Linux platforms.
Alexandre Julliard
julliard at winehq.org
Mon Dec 27 10:03:56 CST 2010
Module: wine
Branch: master
Commit: 264996a75da61d2771d4dfe5d58a9ebac415a4bb
URL: http://source.winehq.org/git/wine.git/?a=commit;h=264996a75da61d2771d4dfe5d58a9ebac415a4bb
Author: Alexandre Julliard <julliard at winehq.org>
Date: Mon Dec 27 12:01:52 2010 +0100
ntdll: Use the futex system calls on all Linux platforms.
---
dlls/ntdll/critsection.c | 23 ++++++++++++-----------
1 files changed, 12 insertions(+), 11 deletions(-)
diff --git a/dlls/ntdll/critsection.c b/dlls/ntdll/critsection.c
index 8a60109..2f1abcf 100644
--- a/dlls/ntdll/critsection.c
+++ b/dlls/ntdll/critsection.c
@@ -26,6 +26,9 @@
#include <stdarg.h>
#include <stdio.h>
#include <sys/types.h>
+#ifdef HAVE_SYS_SYSCALL_H
+#include <sys/syscall.h>
+#endif
#include <time.h>
#include "ntstatus.h"
#define WIN32_NO_STATUS
@@ -56,29 +59,27 @@ static inline void small_pause(void)
#endif
}
-#if defined(linux) && defined(__i386__)
+#ifdef __linux__
static inline int futex_wait( int *addr, int val, struct timespec *timeout )
{
- int ret = syscall( 240/*SYS_futex*/, addr, 0/*FUTEX_WAIT*/, val, timeout, 0, 0 );
- if (ret < 0)
- return -errno;
- return ret;
+ return syscall( SYS_futex, addr, 0/*FUTEX_WAIT*/, val, timeout, 0, 0 );
}
static inline int futex_wake( int *addr, int val )
{
- int ret = syscall( 240/*SYS_futex*/, addr, 1/*FUTEX_WAKE*/, val, NULL, 0, 0 );
- if (ret < 0)
- return -errno;
- return ret;
+ return syscall( SYS_futex, addr, 1/*FUTEX_WAKE*/, val, NULL, 0, 0 );
}
static inline int use_futexes(void)
{
static int supported = -1;
- if (supported == -1) supported = (futex_wait( &supported, 10, NULL ) != -ENOSYS);
+ if (supported == -1)
+ {
+ futex_wait( &supported, 10, NULL );
+ supported = (errno != ENOSYS);
+ }
return supported;
}
@@ -95,7 +96,7 @@ static inline NTSTATUS fast_wait( RTL_CRITICAL_SECTION *crit, int timeout )
{
/* note: this may wait longer than specified in case of signals or */
/* multiple wake-ups, but that shouldn't be a problem */
- if (futex_wait( (int *)&crit->LockSemaphore, val, ×pec ) == -ETIMEDOUT)
+ if (futex_wait( (int *)&crit->LockSemaphore, val, ×pec ) == -1 && errno == ETIMEDOUT)
return STATUS_TIMEOUT;
}
return STATUS_WAIT_0;
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