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/* $OpenBSD: uthread_kill.c,v 1.12 2007/01/28 16:47:41 kettenis Exp $ */
/* PUBLIC_DOMAIN <marc@snafu.org> */
#include <errno.h>
#include <signal.h>
#include <string.h>
#include <unistd.h>
#ifdef _THREAD_SAFE
#include <pthread.h>
#include "pthread_private.h"
/*
* Fake up a minimal siginfo_t for the given signal unless one is already
* pending. The signal number is assumed to be valid.
*/
void
_thread_kill_siginfo(int sig)
{
struct sigstatus *ss = &_thread_sigq[sig - 1];
_SPINLOCK(&ss->lock);
if (ss->pending == 0) {
ss->pending = 1;
memset(&ss->siginfo, 0, sizeof ss->siginfo);
ss->siginfo.si_signo = sig;
ss->siginfo.si_code = SI_USER;
ss->siginfo.si_errno = errno;
ss->siginfo.si_pid = getpid();
}
_SPINUNLOCK(&ss->lock);
}
/*
* Validate the signal number and thread. If valid process the signal.
*/
int
pthread_kill(pthread_t pthread, int sig)
{
int ret;
if (sig >= 0 && sig < NSIG) {
ret = _find_thread(pthread);
if (ret == 0 && sig != 0) {
if (_thread_sigact[sig - 1].sa_handler != SIG_IGN) {
_thread_kern_sig_defer();
if (pthread->state == PS_SIGWAIT &&
sigismember(pthread->data.sigwait, sig)) {
PTHREAD_NEW_STATE(pthread,PS_RUNNING);
pthread->signo = sig;
} else {
_thread_kill_siginfo(sig);
_thread_signal(pthread,sig);
}
_thread_kern_sig_undefer();
}
}
} else
ret = EINVAL;
return ret;
}
#endif
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