Adding upstream version 9.1.upstream/9.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 46 insertions, 0 deletions

diff --git a/lib/nproc.h b/lib/nproc.h
new file mode 100644
index 0000000..505351d
--- /dev/null
+++ b/lib/nproc.h
@@ -0,0 +1,46 @@
+/* Detect the number of processors.
+
+   Copyright (C) 2009-2022 Free Software Foundation, Inc.
+
+   This file 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 file 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 program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Glen Lenker and Bruno Haible.  */
+
+/* Allow the use in C++ code.  */
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* A "processor" in this context means a thread execution unit, that is either
+   - an execution core in a (possibly multi-core) chip, in a (possibly multi-
+     chip) module, in a single computer, or
+   - a thread execution unit inside a core
+     (hyper-threading, see <https://en.wikipedia.org/wiki/Hyper-threading>).
+   Which of the two definitions is used, is unspecified.  */
+
+enum nproc_query
+{
+  NPROC_ALL,                 /* total number of processors */
+  NPROC_CURRENT,             /* processors available to the current process */
+  NPROC_CURRENT_OVERRIDABLE  /* likewise, but overridable through the
+                                OMP_NUM_THREADS environment variable */
+};
+
+/* Return the total number of processors.  The result is guaranteed to
+   be at least 1.  */
+extern unsigned long int num_processors (enum nproc_query query);
+
+#ifdef __cplusplus
+}
+#endif /* C++ */