[PATCH 3/3] C11 threads support

[Sebastian Huber]

Import <threads.h> from latest FreeBSD.  Move types and defines to
<machine/_threads.h> so that it can be customized per target.

newlib/ChangeLog
2015-09-21  Sebastian Huber  <sebastian.huber at embedded-brains.de>

	* libc/include/threads.h: New.
	* libc/sys/rtems/include/machine/_threads.h: Likewise.
---
 newlib/libc/include/threads.h                    | 93 ++++++++++++++++++++++++
 newlib/libc/sys/rtems/include/machine/_threads.h | 54 ++++++++++++++
 2 files changed, 147 insertions(+)
 create mode 100644 newlib/libc/include/threads.h
 create mode 100644 newlib/libc/sys/rtems/include/machine/_threads.h

diff --git a/newlib/libc/include/threads.h b/newlib/libc/include/threads.h
new file mode 100644
index 0000000..9fb08b0
--- /dev/null
+++ b/newlib/libc/include/threads.h
@@ -0,0 +1,93 @@
+/*-
+ * Copyright (c) 2011 Ed Schouten <ed at FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef _THREADS_H_
+#define	_THREADS_H_
+
+#include <machine/_threads.h>
+#include <time.h>
+
+typedef void (*tss_dtor_t)(void *);
+typedef int (*thrd_start_t)(void *);
+
+enum {
+	mtx_plain = 0x1,
+	mtx_recursive = 0x2,
+	mtx_timed = 0x4
+};
+
+enum {
+	thrd_busy = 1,
+	thrd_error = 2,
+	thrd_nomem = 3,
+	thrd_success = 4,
+	thrd_timedout = 5
+};
+
+#if !defined(__cplusplus) || __cplusplus < 201103L
+#define	thread_local		_Thread_local
+#endif
+
+__BEGIN_DECLS
+void	call_once(once_flag *, void (*)(void));
+int	cnd_broadcast(cnd_t *);
+void	cnd_destroy(cnd_t *);
+int	cnd_init(cnd_t *);
+int	cnd_signal(cnd_t *);
+int	cnd_timedwait(cnd_t *__restrict, mtx_t *__restrict __mtx,
+    const struct timespec *__restrict)
+    __requires_exclusive(*__mtx);
+int	cnd_wait(cnd_t *, mtx_t *__mtx)
+    __requires_exclusive(*__mtx);
+void	mtx_destroy(mtx_t *__mtx)
+    __requires_unlocked(*__mtx);
+int	mtx_init(mtx_t *__mtx, int)
+    __requires_unlocked(*__mtx);
+int	mtx_lock(mtx_t *__mtx)
+    __locks_exclusive(*__mtx);
+int	mtx_timedlock(mtx_t *__restrict __mtx,
+    const struct timespec *__restrict)
+    __trylocks_exclusive(thrd_success, *__mtx);
+int	mtx_trylock(mtx_t *__mtx)
+    __trylocks_exclusive(thrd_success, *__mtx);
+int	mtx_unlock(mtx_t *__mtx)
+    __unlocks(*__mtx);
+int	thrd_create(thrd_t *, thrd_start_t, void *);
+thrd_t	thrd_current(void);
+int	thrd_detach(thrd_t);
+int	thrd_equal(thrd_t, thrd_t);
+_Noreturn void
+	thrd_exit(int);
+int	thrd_join(thrd_t, int *);
+int	thrd_sleep(const struct timespec *, struct timespec *);
+void	thrd_yield(void);
+int	tss_create(tss_t *, tss_dtor_t);
+void	tss_delete(tss_t);
+void *	tss_get(tss_t);
+int	tss_set(tss_t, void *);
+__END_DECLS
+
+#endif /* !_THREADS_H_ */
diff --git a/newlib/libc/sys/rtems/include/machine/_threads.h b/newlib/libc/sys/rtems/include/machine/_threads.h
new file mode 100644
index 0000000..24db21c
--- /dev/null
+++ b/newlib/libc/sys/rtems/include/machine/_threads.h
@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2015 embedded brains GmbH.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _MACHINE__THREADS_H_
+#define	_MACHINE__THREADS_H_
+
+#include <machine/_default_types.h>
+#include <sys/lock.h>
+
+typedef struct _Condition_Control cnd_t;
+
+typedef struct _Mutex_recursive_Control mtx_t;
+
+/* pthread_t */
+typedef __uint32_t thrd_t;
+
+/* pthread_key_t */
+typedef __uint32_t tss_t;
+
+/* pthread_once_t */
+typedef struct {
+	int	_is_initialized;
+	int	_init_executed;
+} once_flag;
+
+/* PTHREAD_ONCE_INIT */
+#define	ONCE_FLAG_INIT { 1, 0 }
+
+/* PTHREAD_DESTRUCTOR_ITERATIONS */
+#define	TSS_DTOR_ITERATIONS 4
+
+#endif /* _MACHINE__THREADS_H_ */
-- 
1.8.4.5