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- /****************************************************************************
- * sched/pthread/pthread_getaffinity.c
- *
- * Copyright (C) 2016, 2018 Gregory Nutt. All rights reserved.
- * Author: Gregory Nutt <gnutt@nuttx.org>
- *
- * 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.
- * 3. Neither the name NuttX nor the names of its contributors may be
- * used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * 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.
- *
- ****************************************************************************/
- /****************************************************************************
- * Included Files
- ****************************************************************************/
- #include <nuttx/config.h>
- #include <sys/types.h>
- #include <pthread.h>
- #include <sched.h>
- #include <errno.h>
- #include <debug.h>
- #include <nuttx/sched.h>
- #include "pthread/pthread.h"
- #ifdef CONFIG_SMP
- /****************************************************************************
- * Public Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: pthread_getschedparam
- *
- * Description:
- * The pthread_getaffinity_np() function returns the CPU affinity mask
- * of the thread thread in the buffer pointed to by cpuset.
- *
- * The argument cpusetsize is the length (in bytes) of the buffer
- * pointed to by cpuset. Typically, this argument would be specified as
- * sizeof(cpu_set_t).
- *
- * Input Parameters:
- * thread - The ID of thread whose affinity set will be retrieved.
- * cpusetsize - Size of cpuset. MUST be sizeofcpu_set_t().
- * cpuset - The location to return the thread's new affinity set.
- *
- * Returned Value:
- * 0 if successful. Otherwise, an errno value is returned indicating the
- * nature of the failure.
- *
- ****************************************************************************/
- int pthread_getaffinity_np(pthread_t thread, size_t cpusetsize,
- FAR cpu_set_t *cpuset)
- {
- int ret;
- sinfo("thread ID=%d cpusetsize=%d cpuset=%p\n",
- (int)thread, (int)cpusetsize, cpusetsize);
- DEBUGASSERT(thread > 0 && cpusetsize == sizeof(cpu_set_t) &&
- cpuset != NULL);
- /* Let nxsched_getaffinity do all of the work */
- ret = nxsched_getaffinity((pid_t)thread, cpusetsize, cpuset);
- if (ret < 0)
- {
- /* If nxsched_getaffinity() fails, return the positive errno */
- ret = -ret;
- }
- return ret;
- }
- #endif /* CONFIG_SMP */
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