C11 threads: Move implementation to sysdeps/pthread

so it gets shared by nptl and htl. Also add htl versions of thrd_current and
thrd_yield.

Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>

37 files changed, 1749 insertions, 0 deletions

diff --git a/sysdeps/pthread/Makefile b/sysdeps/pthread/Makefile
index 7f9eadd0e2..889f10d8b1 100644
--- a/sysdeps/pthread/Makefile
+++ b/sysdeps/pthread/Makefile
@@ -25,3 +25,21 @@ $(objpfx)tst-timer: $(objpfx)librt.a $(static-thread-library)
 endif
 
 endif
+
+ifneq (,$(filter $(subdir),htl nptl))
+headers += threads.h
+
+routines += thrd_current thrd_equal thrd_sleep thrd_yield
+
+libpthread-routines += thrd_create thrd_detach thrd_exit thrd_join \
+		       call_once \
+		       mtx_destroy mtx_init mtx_lock mtx_timedlock \
+		       mtx_trylock mtx_unlock \
+		       cnd_broadcast \
+		       cnd_destroy cnd_init cnd_signal cnd_timedwait cnd_wait \
+		       tss_create tss_delete tss_get tss_set
+
+tests += tst-cnd-basic tst-mtx-trylock tst-cnd-broadcast \
+	 tst-cnd-timedwait tst-thrd-detach tst-mtx-basic tst-thrd-sleep \
+	 tst-mtx-recursive tst-tss-basic tst-call-once tst-mtx-timedlock
+endif
diff --git a/sysdeps/pthread/call_once.c b/sysdeps/pthread/call_once.c
new file mode 100644
index 0000000000..25e2964c76
--- /dev/null
+++ b/sysdeps/pthread/call_once.c
@@ -0,0 +1,31 @@
+/* C11 threads call once implementation.
+   Copyright (C) 2018-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C 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.
+
+   The GNU C 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 the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <stdalign.h>
+
+#include "thrd_priv.h"
+
+void
+call_once (once_flag *flag, void (*func)(void))
+{
+  _Static_assert (sizeof (once_flag) == sizeof (pthread_once_t),
+		  "sizeof (once_flag) != sizeof (pthread_once_t)");
+  _Static_assert (alignof (once_flag) == alignof (pthread_once_t),
+		  "alignof (once_flag) != alignof (pthread_once_t)");
+  __pthread_once ((pthread_once_t *) flag, func);
+}
diff --git a/sysdeps/pthread/cnd_broadcast.c b/sysdeps/pthread/cnd_broadcast.c
new file mode 100644
index 0000000000..66e0fce0c6
--- /dev/null
+++ b/sysdeps/pthread/cnd_broadcast.c
@@ -0,0 +1,26 @@
+/* C11 thread conditional broadcast implementation.
+   Copyright (C) 2018-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C 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.
+
+   The GNU C 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 the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include "thrd_priv.h"
+
+int
+cnd_broadcast (cnd_t *cond)
+{
+  int err_code = __pthread_cond_broadcast ((pthread_cond_t*) cond);
+  return thrd_err_map (err_code);
+}
diff --git a/sysdeps/pthread/cnd_destroy.c b/sysdeps/pthread/cnd_destroy.c
new file mode 100644
index 0000000000..763e91cb0f
--- /dev/null
+++ b/sysdeps/pthread/cnd_destroy.c
@@ -0,0 +1,26 @@
+/* C11 threads conditional destroy implementation.
+   Copyright (C) 2018-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C 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.
+
+   The GNU C 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 the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include "thrd_priv.h"
+#include "pthreadP.h"
+
+void
+cnd_destroy (cnd_t *cond)
+{
+  __pthread_cond_destroy ((pthread_cond_t *) cond);
+}
diff --git a/sysdeps/pthread/cnd_init.c b/sysdeps/pthread/cnd_init.c
new file mode 100644
index 0000000000..e8d7d68a2c
--- /dev/null
+++ b/sysdeps/pthread/cnd_init.c
@@ -0,0 +1,33 @@
+/* C11 thread conditional initialization implementation.
+   Copyright (C) 2018-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C 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.
+
+   The GNU C 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 the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <stdalign.h>
+
+#include "thrd_priv.h"
+
+int
+cnd_init (cnd_t *cond)
+{
+  _Static_assert (sizeof (cnd_t) == sizeof (pthread_cond_t),
+		  "(sizeof (cnd_t) != sizeof (pthread_cond_t)");
+  _Static_assert (alignof (cnd_t) == alignof (pthread_cond_t),
+		  "alignof (cnd_t) != alignof (pthread_cond_t)");
+
+  int err_code = __pthread_cond_init ((pthread_cond_t *)cond, NULL);
+  return thrd_err_map (err_code);
+}
diff --git a/sysdeps/pthread/cnd_signal.c b/sysdeps/pthread/cnd_signal.c
new file mode 100644
index 0000000000..27155ffc1b
--- /dev/null
+++ b/sysdeps/pthread/cnd_signal.c
@@ -0,0 +1,26 @@
+/* C11 threads conditional signal implementation.
+   Copyright (C) 2018-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C 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.
+
+   The GNU C 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 the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include "thrd_priv.h"
+
+int
+cnd_signal (cnd_t *cond)
+{
+  int err_code = __pthread_cond_signal ((pthread_cond_t *) cond);
+  return thrd_err_map (err_code);
+}
diff --git a/sysdeps/pthread/cnd_timedwait.c b/sysdeps/pthread/cnd_timedwait.c
new file mode 100644
index 0000000000..c7f5309cf7
--- /dev/null
+++ b/sysdeps/pthread/cnd_timedwait.c
@@ -0,0 +1,29 @@
+/* C11 threads conditional timed wait implementation.
+   Copyright (C) 2018-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C 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.
+
+   The GNU C 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 the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include "thrd_priv.h"
+
+int
+cnd_timedwait (cnd_t *restrict cond, mtx_t *restrict mutex,
+	       const struct timespec* restrict time_point)
+{
+  int err_code = __pthread_cond_timedwait ((pthread_cond_t *) cond,
+					   (pthread_mutex_t *) mutex,
+					   time_point);
+  return thrd_err_map (err_code);
+}
diff --git a/sysdeps/pthread/cnd_wait.c b/sysdeps/pthread/cnd_wait.c
new file mode 100644
index 0000000000..8070ca7c6a
--- /dev/null
+++ b/sysdeps/pthread/cnd_wait.c
@@ -0,0 +1,27 @@
+/* C11 threads conditional wait implementaiton.
+   Copyright (C) 2018-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C 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.
+
+   The GNU C 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 the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include "thrd_priv.h"
+
+int
+cnd_wait (cnd_t *cond, mtx_t *mutex)
+{
+  int err_code = __pthread_cond_wait ((pthread_cond_t *) cond,
+				      (pthread_mutex_t *) mutex);
+  return thrd_err_map (err_code);
+}
diff --git a/sysdeps/pthread/mtx_destroy.c b/sysdeps/pthread/mtx_destroy.c
new file mode 100644
index 0000000000..9ac324c8f8
--- /dev/null
+++ b/sysdeps/pthread/mtx_destroy.c
@@ -0,0 +1,26 @@
+/* C11 threads mutex destroy implementation.
+   Copyright (C) 2018-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C 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.
+
+   The GNU C 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 the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include "thrd_priv.h"
+#include "pthreadP.h"
+
+void
+mtx_destroy (mtx_t *mutex)
+{
+  __pthread_mutex_destroy ((pthread_mutex_t *) mutex);
+}
diff --git a/sysdeps/pthread/mtx_init.c b/sysdeps/pthread/mtx_init.c
new file mode 100644
index 0000000000..436a03673e
--- /dev/null
+++ b/sysdeps/pthread/mtx_init.c
@@ -0,0 +1,53 @@
+/* C11 threads mutex initialization implementation.
+   Copyright (C) 2018-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C 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.
+
+   The GNU C 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 the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <stdalign.h>
+
+#include "thrd_priv.h"
+
+int
+mtx_init (mtx_t *mutex, int type)
+{
+  _Static_assert (sizeof (mtx_t) == sizeof (pthread_mutex_t),
+		  "sizeof (mtx_t) != sizeof (pthread_mutex_t)");
+  _Static_assert (alignof (mtx_t) == alignof (pthread_mutex_t),
+		  "alignof (mtx_t) != alignof (pthread_mutex_t)");
+
+  pthread_mutexattr_t attr;
+
+  __pthread_mutexattr_init (&attr);
+
+  /* Another possible solution would be to set the flags directly in
+     mutex object. */
+  switch (type)
+  {
+    case mtx_plain | mtx_recursive:
+    case mtx_timed | mtx_recursive:
+      __pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_RECURSIVE);
+      break;
+    case mtx_plain:
+    case mtx_timed: /* No difference between both in standard */
+    default:
+      __pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_NORMAL);
+      break;
+  }
+
+  int err_code = __pthread_mutex_init ((pthread_mutex_t *) mutex, &attr);
+  /* pthread_mutexattr_destroy implementation is a noop.  */
+  return thrd_err_map (err_code);
+}
diff --git a/sysdeps/pthread/mtx_lock.c b/sysdeps/pthread/mtx_lock.c
new file mode 100644
index 0000000000..cf1632b3f2
--- /dev/null
+++ b/sysdeps/pthread/mtx_lock.c
@@ -0,0 +1,26 @@
+/* C11 threads mutex lock implementation.
+   Copyright (C) 2018-2020 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C 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.
+
+   The GNU C 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 the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include "thrd_priv.h"
+
+int
+mtx_lock (mtx_t *mutex)
+{
+  int err_code = __pthread_mutex_lock ((pthread_mutex