[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/build/uClibc/libc/signal/sigwait.c b/ap/build/uClibc/libc/signal/sigwait.c
new file mode 100644
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--- /dev/null
+++ b/ap/build/uClibc/libc/signal/sigwait.c
@@ -0,0 +1,167 @@
+/* vi: set sw=4 ts=4: */
+/* sigwait
+ *
+ * Copyright (C) 2006 by Steven J. Hill <sjhill@realitydiluted.com>
+ * Copyright (C) 2003-2005 by Erik Andersen <andersen@uclibc.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * The GNU C Library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with the GNU C Library; if not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ * 02111-1307 USA. */
+
+#include <errno.h>
+#include <signal.h>
+#include <string.h>
+#include <unistd.h>
+
+#ifdef __UCLIBC_HAS_THREADS_NATIVE__
+# include <sysdep-cancel.h>
+
+# ifdef __NR_rt_sigtimedwait
+
+/* Return any pending signal or wait for one for the given time. */
+static int do_sigwait(const sigset_t *set, int *sig)
+{
+ int ret;
+
+# ifdef SIGCANCEL
+ sigset_t tmpset;
+ if (set != NULL
+ && (__builtin_expect (__sigismember (set, SIGCANCEL), 0)
+# ifdef SIGSETXID
+ || __builtin_expect (__sigismember (set, SIGSETXID), 0)
+# endif
+ ))
+ {
+ /* Create a temporary mask without the bit for SIGCANCEL set. */
+ // We are not copying more than we have to.
+ memcpy(&tmpset, set, _NSIG / 8);
+ __sigdelset(&tmpset, SIGCANCEL);
+# ifdef SIGSETXID
+ __sigdelset(&tmpset, SIGSETXID);
+# endif
+ set = &tmpset;
+ }
+# endif
+
+ /* XXX The size argument hopefully will have to be changed to the
+ real size of the user-level sigset_t. */
+ INTERNAL_SYSCALL_DECL(err);
+ do
+ ret = INTERNAL_SYSCALL (rt_sigtimedwait, err, 4, set, NULL,
+ NULL, _NSIG / 8);
+ while (INTERNAL_SYSCALL_ERROR_P (ret, err)
+ && INTERNAL_SYSCALL_ERRNO (ret, err) == EINTR);
+ if (! INTERNAL_SYSCALL_ERROR_P (ret, err))
+ {
+ *sig = ret;
+ ret = 0;
+ }
+else
+ ret = INTERNAL_SYSCALL_ERRNO (ret, err);
+
+ return ret;
+}
+
+int sigwait (const sigset_t *set, int *sig)
+{
+ if(SINGLE_THREAD_P)
+ return do_sigwait(set, sig);
+
+ int oldtype = LIBC_CANCEL_ASYNC();
+
+ int result = do_sigwait(set, sig);
+
+ LIBC_CANCEL_RESET(oldtype);
+
+ return result;
+}
+# else /* __NR_rt_sigtimedwait */
+# error We must have rt_sigtimedwait defined!!!
+# endif
+#else /* __UCLIBC_HAS_THREADS_NATIVE__ */
+
+# if defined __UCLIBC_HAS_REALTIME__
+
+int sigwait (const sigset_t *set, int *sig)
+{
+ int ret = 1;
+ if ((ret = sigwaitinfo(set, NULL)) != -1) {
+ *sig = ret;
+ return 0;
+ }
+ return 1;
+}
+
+# else /* __UCLIBC_HAS_REALTIME__ */
+/* variant without REALTIME extensions */
+
+static smallint was_sig; /* obviously not thread-safe */
+
+static void ignore_signal(int sig)
+{
+ was_sig = sig;
+}
+
+int sigwait (const sigset_t *set, int *sig)
+{
+ sigset_t tmp_mask;
+ struct sigaction saved[NSIG];
+ struct sigaction action;
+ int save_errno;
+ int this;
+
+ /* Prepare set. */
+ __sigfillset (&tmp_mask);
+
+ /* Unblock all signals in the SET and register our nice handler. */
+ action.sa_handler = ignore_signal;
+ action.sa_flags = 0;
+ __sigfillset (&action.sa_mask); /* Block all signals for handler. */
+
+ /* Make sure we recognize error conditions by setting WAS_SIG to a
+ value which does not describe a legal signal number. */
+ was_sig = -1;
+
+ for (this = 1; this < NSIG; ++this)
+ if (__sigismember (set, this))
+ {
+ /* Unblock this signal. */
+ __sigdelset (&tmp_mask, this);
+
+ /* Register temporary action handler. */
+ /* In Linux (as of 2.6.25), fails only if sig is SIGKILL or SIGSTOP */
+ /* (so, will it work correctly if set has, say, SIGSTOP?) */
+ if (sigaction (this, &action, &saved[this]) != 0)
+ goto restore_handler;
+ }
+
+ /* Now we can wait for signals. */
+ sigsuspend (&tmp_mask);
+
+ restore_handler:
+ save_errno = errno;
+
+ while (--this >= 1)
+ if (__sigismember (set, this))
+ /* We ignore errors here since we must restore all handlers. */
+ sigaction (this, &saved[this], NULL);
+
+ __set_errno (save_errno);
+
+ /* Store the result and return. */
+ *sig = was_sig;
+ return was_sig == -1 ? -1 : 0;
+}
+# endif /* __UCLIBC_HAS_REALTIME__ */
+#endif /* __UCLIBC_HAS_THREADS_NATIVE__ */