diff options
Diffstat (limited to 'cpukit/libtest/t-test-busy.c')
-rw-r--r-- | cpukit/libtest/t-test-busy.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/cpukit/libtest/t-test-busy.c b/cpukit/libtest/t-test-busy.c new file mode 100644 index 0000000000..3bf149b8bb --- /dev/null +++ b/cpukit/libtest/t-test-busy.c @@ -0,0 +1,58 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ + +/** + * @file + * + * @ingroup RTEMSTestFrameworkImpl + * + * @brief Implementation of T_busy(). + */ + +/* + * Copyright (C) 2014, 2020 embedded brains GmbH (http://www.embedded-brains.de) + * + * 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. + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <rtems/test.h> + +/* + * It is important that we actually use the same T_busy() function at the + * various places. So, the compiler must not inline this function. Take care + * of link time optimization. + */ +__attribute__((__noinline__)) void +T_busy(uint_fast32_t count) +{ + uint_fast32_t i; + + i = 0; + + do { + __asm__ volatile (""); + ++i; + } while (i < count); +} |