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-rw-r--r--libc/signal/sigwait.c83
1 files changed, 76 insertions, 7 deletions
diff --git a/libc/signal/sigwait.c b/libc/signal/sigwait.c
index d0421f3d3..8fd7ea81f 100644
--- a/libc/signal/sigwait.c
+++ b/libc/signal/sigwait.c
@@ -1,7 +1,8 @@
/* vi: set sw=4 ts=4: */
/* sigwait
*
- * Copyright (C) 2003 by Erik Andersen <andersen@uclibc.org>
+ * 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
@@ -23,19 +24,86 @@
#include <string.h>
#include <unistd.h>
-#if defined __UCLIBC_HAS_REALTIME__
+#ifdef __UCLIBC_HAS_THREADS_NATIVE__
+# include <sysdep-cancel.h>
-int sigwait(const sigset_t *set, int *sig)
+# 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 = sigwaitinfo(set, NULL);
- if (ret != -1) {
+ int ret = 1;
+ if ((ret = sigwaitinfo(set, NULL)) != -1) {
*sig = ret;
return 0;
}
return 1;
}
-#else /* __UCLIBC_HAS_REALTIME__ */
+# else /* __UCLIBC_HAS_REALTIME__ */
/* variant without REALTIME extensions */
static smallint was_sig; /* obviously not thread-safe */
@@ -95,4 +163,5 @@ int sigwait (const sigset_t *set, int *sig)
*sig = was_sig;
return was_sig == -1 ? -1 : 0;
}
-#endif /* __UCLIBC_HAS_REALTIME__ */
+# endif /* __UCLIBC_HAS_REALTIME__ */
+#endif /* __UCLIBC_HAS_THREADS_NATIVE__ */