+// 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" {
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)
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__)
+
+/*
+ * The futex_noasync compat code uses a weak symbol to share state across
+ * different shared object which is not possible on Windows with the
+ * Portable Executable format. Use the async compat code for both cases.
+ */
+static inline int futex_noasync(int32_t *uaddr, int op, int32_t val,
+ const struct timespec *timeout, int32_t *uaddr2, int32_t val3)
+{
+ return compat_futex_async(uaddr, op, val, timeout, uaddr2, val3);
+}
+
+static inline int futex_async(int32_t *uaddr, int op, int32_t val,
+ const struct timespec *timeout, int32_t *uaddr2, int32_t val3)
+{
+ return compat_futex_async(uaddr, op, val, timeout, uaddr2, val3);
+}
+
#else
static inline int futex_noasync(int32_t *uaddr, int op, int32_t val,