libstdthreads: Add C11 threads

cpukit/libstdthreads/Makefile.am

@@ -0,0 +1,21 @@
+include $(top_srcdir)/automake/compile.am
+
+include_HEADERS =
+
+noinst_LIBRARIES = libstdthreads.a
+
+libstdthreads_a_CFLAGS = -std=c11
+libstdthreads_a_CPPFLAGS = $(AM_CPPFLAGS)
+
+libstdthreads_a_SOURCES =
+if HAVE_THREADS_H
+libstdthreads_a_SOURCES += call_once.c
+libstdthreads_a_SOURCES += cnd.c
+libstdthreads_a_SOURCES += mtx.c
+if HAS_PTHREADS
+libstdthreads_a_SOURCES += thrd.c
+endif
+libstdthreads_a_SOURCES += tss.c
+endif
+
+include $(top_srcdir)/automake/local.am

cpukit/libstdthreads/call_once.c

@@ -26,13 +26,9 @@
  * $FreeBSD r228904 2011-12-26T21:51:53Z$
  */
 
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
+#include <threads.h>
 #include <pthread.h>
 
-#include "threads.h"
-
 void
 call_once(once_flag *flag, void (*func)(void))
 {

cpukit/libstdthreads/cnd.c

@@ -1,5 +1,6 @@
 /*-
  * Copyright (c) 2011 Ed Schouten <ed@FreeBSD.org>
+ * Copyright (c) 2015 embedded brains GmbH <info@embedded-brains.de>
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -26,20 +27,14 @@
  * $FreeBSD r228904 2011-12-26T21:51:53Z$
  */
 
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
+#include <threads.h>
 #include <errno.h>
-#include <pthread.h>
-
-#include "threads.h"
 
 int
 cnd_broadcast(cnd_t *cond)
 {
 
-	if (pthread_cond_broadcast(cond) != 0)
-		return (thrd_error);
+	_Condition_Broadcast(cond);
 	return (thrd_success);
 }
 
@@ -47,29 +42,22 @@ void
 cnd_destroy(cnd_t *cond)
 {
 
-	(void)pthread_cond_destroy(cond);
+	_Condition_Destroy(cond);
 }
 
 int
 cnd_init(cnd_t *cond)
 {
 
-	switch (pthread_cond_init(cond, NULL)) {
-	case 0:
-		return (thrd_success);
-	case ENOMEM:
-		return (thrd_nomem);
-	default:
-		return (thrd_error);
-	}
+	_Condition_Initialize(cond);
+	return (thrd_success);
 }
 
 int
 cnd_signal(cnd_t *cond)
 {
 
-	if (pthread_cond_signal(cond) != 0)
-		return (thrd_error);
+	_Condition_Signal(cond);
 	return (thrd_success);
 }
 
@@ -78,7 +66,7 @@ cnd_timedwait(cnd_t *restrict cond, mtx_t *restrict mtx,
     const struct timespec *restrict ts)
 {
 
-	switch (pthread_cond_timedwait(cond, mtx, ts)) {
+	switch (_Condition_Wait_recursive_timed(cond, mtx, ts)) {
 	case 0:
 		return (thrd_success);
 	case ETIMEDOUT:
@@ -92,7 +80,6 @@ int
 cnd_wait(cnd_t *cond, mtx_t *mtx)
 {
 
-	if (pthread_cond_wait(cond, mtx) != 0)
-		return (thrd_error);
+	_Condition_Wait_recursive(cond, mtx);
 	return (thrd_success);
 }

cpukit/libstdthreads/mtx.c

@@ -1,5 +1,6 @@
 /*-
  * Copyright (c) 2011 Ed Schouten <ed@FreeBSD.org>
+ * Copyright (c) 2015 embedded brains GmbH <info@embedded-brains.de>
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -26,46 +27,23 @@
  * $FreeBSD r279326 2015-02-26T16:39:57Z$
  */
 
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
+#include <threads.h>
+#include <sys/lock.h>
 #include <errno.h>
-#include <pthread.h>
-
-#include "threads.h"
 
 void
 mtx_destroy(mtx_t *mtx)
 {
 
-	(void)pthread_mutex_destroy(mtx);
+	_Mutex_recursive_Destroy(mtx);
 }
 
 int
 mtx_init(mtx_t *mtx, int type)
 {
-	pthread_mutexattr_t attr;
-	int mt;
 
-	switch (type) {
-	case mtx_plain:
-	case mtx_timed:
-		mt = PTHREAD_MUTEX_NORMAL;
-		break;
-	case mtx_plain | mtx_recursive:
-	case mtx_timed | mtx_recursive:
-		mt = PTHREAD_MUTEX_RECURSIVE;
-		break;
-	default:
-		return (thrd_error);
-	}
-
-	if (pthread_mutexattr_init(&attr) != 0)
-		return (thrd_error);
-	if (pthread_mutexattr_settype(&attr, mt) != 0)
-		return (thrd_error);
-	if (pthread_mutex_init(mtx, &attr) != 0)
-		return (thrd_error);
+	(void)type;
+	_Mutex_recursive_Initialize(mtx);
 	return (thrd_success);
 }
 
@@ -73,8 +51,7 @@ int
 mtx_lock(mtx_t *mtx)
 {
 
-	if (pthread_mutex_lock(mtx) != 0)
-		return (thrd_error);
+	_Mutex_recursive_Acquire(mtx);
 	return (thrd_success);
 }
 
@@ -82,7 +59,7 @@ int
 mtx_timedlock(mtx_t *restrict mtx, const struct timespec *restrict ts)
 {
 
-	switch (pthread_mutex_timedlock(mtx, ts)) {
+	switch (_Mutex_recursive_Acquire_timed(mtx, ts)) {
 	case 0:
 		return (thrd_success);
 	case ETIMEDOUT:
@@ -96,13 +73,11 @@ int
 mtx_trylock(mtx_t *mtx)
 {
 
-	switch (pthread_mutex_trylock(mtx)) {
+	switch (_Mutex_recursive_Try_acquire(mtx)) {
 	case 0:
 		return (thrd_success);
-	case EBUSY:
-		return (thrd_busy);
 	default:
-		return (thrd_error);
+		return (thrd_busy);
 	}
 }
 
@@ -110,7 +85,6 @@ int
 mtx_unlock(mtx_t *mtx)
 {
 
-	if (pthread_mutex_unlock(mtx) != 0)
-		return (thrd_error);
+	_Mutex_recursive_Release(mtx);
 	return (thrd_success);
 }

cpukit/libstdthreads/thrd.c

@@ -26,15 +26,12 @@
  * $FreeBSD r279318 2015-02-26T09:42:03Z$
  */
 
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
+#include <threads.h>
 #include <pthread.h>
+#include <sched.h>
 #include <stdint.h>
 #include <stdlib.h>
 
-#include "threads.h"
-
 struct thrd_param {
 	thrd_start_t	 func;
 	void		*arg;
@@ -124,5 +121,5 @@ void
 thrd_yield(void)
 {
 
-	pthread_yield();
+	sched_yield();
 }

cpukit/libstdthreads/tss.c

@@ -26,13 +26,10 @@
  * $FreeBSD r228904 2011-12-26T21:51:53Z$
  */
 
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
+#include <threads.h>
+#include <limits.h>
 #include <pthread.h>
 
-#include "threads.h"
-
 int
 tss_create(tss_t *key, tss_dtor_t dtor)
 {