fix: handle EINTR correctly in get_cpu_mask_from_sysfs

[urcu.git] / include / urcu / futex.h

diff --git a/include/urcu/futex.h b/include/urcu/futex.h
index 753df622005f8d4103010e9f324827e8f97f2b62..9d0a997473c025563bd9c557225e2029ecd6f831 100644 (file)
--- a/include/urcu/futex.h
+++ b/include/urcu/futex.h
@@ -1,30 +1,37 @@
+// SPDX-FileCopyrightText: 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+//
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 #ifndef _URCU_FUTEX_H
 #define _URCU_FUTEX_H
 
 /*
- * urcu-futex.h
- *
  * Userspace RCU - sys_futex/compat_futex header.
- *
- * Copyright 2011-2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #include <urcu/config.h>
+#include <urcu/syscall-compat.h>
+
+#include <errno.h>
 #include <stdint.h>
+#include <time.h>
+
+#if (defined(__linux__) && defined(__NR_futex))
+
+/* For backwards compat */
+#define CONFIG_RCU_HAVE_FUTEX 1
+
+#include <unistd.h>
+#include <errno.h>
+#include <urcu/compiler.h>
+#include <urcu/arch.h>
+
+#elif defined(__FreeBSD__)
+
+#include <sys/types.h>
+#include <sys/umtx.h>
+
+#endif
 
 #ifdef __cplusplus
 extern "C" {
@@ -52,12 +59,7 @@ extern int compat_futex_noasync(int32_t *uaddr, int op, int32_t val,
 extern int compat_futex_async(int32_t *uaddr, int op, int32_t val,
                const struct timespec *timeout, int32_t *uaddr2, int32_t val3);
 
-#ifdef CONFIG_RCU_HAVE_FUTEX
-
-#include <unistd.h>
-#include <errno.h>
-#include <urcu/compiler.h>
-#include <urcu/arch.h>
+#if (defined(__linux__) && defined(__NR_futex))
 
 static inline int futex(int32_t *uaddr, int op, int32_t val,
                const struct timespec *timeout, int32_t *uaddr2, int32_t val3)
@@ -102,6 +104,48 @@ static inline int futex_async(int32_t *uaddr, int op, int32_t val,
        return ret;
 }
 
+#elif defined(__FreeBSD__)
+
+static inline int futex_async(int32_t *uaddr, int op, int32_t val,
+               const struct timespec *timeout,
+               int32_t *uaddr2 __attribute__((unused)),
+               int32_t val3 __attribute__((unused)))
+{
+       int umtx_op;
+       void *umtx_uaddr = NULL, *umtx_uaddr2 = NULL;
+       struct _umtx_time umtx_timeout = {
+               ._flags = UMTX_ABSTIME,
+               ._clockid = CLOCK_MONOTONIC,
+       };
+
+       switch (op) {
+       case FUTEX_WAIT:
+               /* On FreeBSD, a "u_int" is a 32-bit integer. */
+               umtx_op = UMTX_OP_WAIT_UINT;
+               if (timeout != NULL) {
+                       umtx_timeout._timeout = *timeout;
+                       umtx_uaddr = (void *) sizeof(umtx_timeout);
+                       umtx_uaddr2 = (void *) &umtx_timeout;
+               }
+               break;
+       case FUTEX_WAKE:
+               umtx_op = UMTX_OP_WAKE;
+               break;
+       default:
+               errno = EINVAL;
+               return -1;
+       }
+
+       return _umtx_op(uaddr, umtx_op, (uint32_t) val, umtx_uaddr,
+                       umtx_uaddr2);
+}
+
+static inline int futex_noasync(int32_t *uaddr, int op, int32_t val,
+               const struct timespec *timeout, int32_t *uaddr2, int32_t val3)
+{
+       return futex_async(uaddr, op, val, timeout, uaddr2, val3);
+}
+
 #elif defined(__CYGWIN__)
 
 /*