diff options
Diffstat (limited to 'nuttx/sched/sig_findaction.c')
-rw-r--r-- | nuttx/sched/sig_findaction.c | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/nuttx/sched/sig_findaction.c b/nuttx/sched/sig_findaction.c new file mode 100644 index 0000000000..98df313ec2 --- /dev/null +++ b/nuttx/sched/sig_findaction.c @@ -0,0 +1,100 @@ +/************************************************************ + * sig_findaction.c + * + * Copyright (C) 2007 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * 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 Gregory Nutt 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 <sys/types.h> +#include "sig_internal.h" + +/************************************************************ + * Definitions + ************************************************************/ + +/************************************************************ + * Private Type Declarations + ************************************************************/ + +/************************************************************ + * Global Variables + ************************************************************/ + +/************************************************************ + * Private Variables + ************************************************************/ + +/************************************************************ + * Private Function Prototypes + ************************************************************/ + +/************************************************************ + * Public Functions + ************************************************************/ + +/************************************************************ + * Function: sig_findaction + * + * Description: + * Allocate a new element for a signal queue + * + ************************************************************/ + +sigactq_t *sig_findaction(_TCB *stcb, int signo) +{ + sigactq_t *sigact = NULL; + + /* Verify the caller's sanity */ + + if (stcb) + { + /* Sigactions can only be assigned to the currently executing + * thread. So, a simple lock ought to give us sufficient + * protection. + */ + + sched_lock(); + + /* Seach the list for a sigaction on this signal */ + + for(sigact = (sigactq_t*)stcb->sigactionq.head; + ((sigact) && (sigact->signo != signo)); + sigact = sigact->flink); + + sched_unlock(); + } + + return sigact; +} |