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Diffstat (limited to 'nuttx/sched/pthread_detach.c')
-rw-r--r-- | nuttx/sched/pthread_detach.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/nuttx/sched/pthread_detach.c b/nuttx/sched/pthread_detach.c new file mode 100644 index 000000000..a959d94b3 --- /dev/null +++ b/nuttx/sched/pthread_detach.c @@ -0,0 +1,137 @@ +/************************************************************************ + * sched/pthread_detach.c + * + * Copyright (C) 2007, 2009 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 <stdbool.h> +#include <pthread.h> +#include <errno.h> +#include <debug.h> + +#include "os_internal.h" +#include "pthread_internal.h" + +/************************************************************************ + * Pre-processor Definitions + ************************************************************************/ + +/************************************************************************ + * Private Type Declarations + ************************************************************************/ + +/************************************************************************ + * Global Variables + ************************************************************************/ + +/************************************************************************ + * Private Variables + ************************************************************************/ + +/************************************************************************ + * Private Functions + ************************************************************************/ + +/************************************************************************ + * Public Functions + ************************************************************************/ + +/************************************************************************ + * Name: pthread_detach + * + * Description: + * A thread object may be "detached" to specify that the return value + * and completion status will not be requested. + * + * Parameters: + * thread + * + * Return Value: + * 0 if successful. Otherwise, an error code. + * + * Assumptions: + * + ************************************************************************/ + +int pthread_detach(pthread_t thread) +{ + FAR join_t *pjoin; + int ret; + + sdbg("Thread=%d\n", thread); + + /* Find the entry associated with this pthread. */ + + (void)pthread_takesemaphore(&g_join_semaphore); + pjoin = pthread_findjoininfo((pid_t)thread); + if (!pjoin) + { + sdbg("Could not find thread entry\n"); + ret = EINVAL; + } + else + { + /* Has the thread already terminated? */ + + if (pjoin->terminated) + { + /* YES.. just remove the thread entry. */ + + pthread_destroyjoin(pjoin); + } + else + { + /* NO.. Just mark the thread as detached. It + * will be removed and deallocated when the + * thread exits + */ + + pjoin->detached = true; + } + + /* Either case is successful */ + + ret = OK; + } + + (void)pthread_givesemaphore(&g_join_semaphore); + + sdbg("Returning %d\n", ret); + return ret; +} |