diff options
Diffstat (limited to 'nuttx/sched/task_exithook.c')
-rw-r--r-- | nuttx/sched/task_exithook.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/nuttx/sched/task_exithook.c b/nuttx/sched/task_exithook.c index 3bde8fb7a..9ce2e5899 100644 --- a/nuttx/sched/task_exithook.c +++ b/nuttx/sched/task_exithook.c @@ -41,6 +41,7 @@ #include <stdlib.h> #include <unistd.h> +#include <signal.h> #include <debug.h> #include <errno.h> @@ -188,6 +189,56 @@ static inline void task_onexit(FAR _TCB *tcb, int status) #endif /**************************************************************************** + * Name: task_sigchild + * + * Description: + * Send the SIGCHILD signal to the parent thread + * + ****************************************************************************/ + +#ifdef CONFIG_SCHED_HAVE_PARENT +static inline void task_sigchild(FAR _TCB *tcb, int status) +{ + FAR _TCB *ptcb; + siginfo_t info; + + /* Keep things stationary through the following */ + + sched_lock(); + + /* Get the TCB of the receiving task */ + + ptcb = sched_gettcb(tcb->parent); + if (!ptcb) + { + /* The parent no longer exists... bail */ + + sched_unlock(); + return; + } + + /* Create the siginfo structure. We don't actually know the cause. That + * is a bug. Let's just say that the child task just exit-ted for now. + */ + + info.si_signo = SIGCHLD; + info.si_code = CLD_EXITED; + info.si_value.sival_ptr = NULL; + info.si_pid = tcb->pid; + info.si_status = status; + + /* Send the signal. We need to use this internal interface so that we can + * provide the correct si_code value with the signal. + */ + + (void)sig_received(ptcb, &info); + sched_unlock(); +} +#else +# define task_sigchild(tcb,status) +#endif + +/**************************************************************************** * Name: task_exitwakeup * * Description: @@ -259,6 +310,10 @@ void task_exithook(FAR _TCB *tcb, int status) task_atexit(tcb); + /* Send SIGCHLD to the parent of the exiting task */ + + task_sigchild(tcb, status); + /* Call any registered on_exit function(s) */ task_onexit(tcb, status); |