libpthread/nptl: core of the "Native Posix Threading Library" for uClibc

targetting arm,sh,i386,mips,sparc for now

Signed-off-by: Austin Foxley <austinf@cetoncorp.com>

1 files changed, 70 insertions, 0 deletions

diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/pthread_kill.c b/libpthread/nptl/sysdeps/unix/sysv/linux/pthread_kill.c
new file mode 100644
index 000000000..104472468
--- /dev/null
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/pthread_kill.c
@@ -0,0 +1,70 @@
+/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
+
+   The GNU C Library 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 <pthreadP.h>
+#include <tls.h>
+#include <sysdep.h>
+#include <bits/kernel-features.h>
+
+
+int
+__pthread_kill (threadid, signo)
+     pthread_t threadid;
+     int signo;
+{
+  struct pthread *pd = (struct pthread *) threadid;
+
+  /* Make sure the descriptor is valid.  */
+  if (INVALID_TD_P (pd))
+    /* Not a valid thread handle.  */
+    return ESRCH;
+
+  /* Disallow sending the signal we use for cancellation, timers, for
+     for the setxid implementation.  */
+  if (signo == SIGCANCEL || signo == SIGTIMER || signo == SIGSETXID)
+    return EINVAL;
+
+  /* We have a special syscall to do the work.  */
+  INTERNAL_SYSCALL_DECL (err);
+
+  /* One comment: The PID field in the TCB can temporarily be changed
+     (in fork).  But this must not affect this code here.  Since this
+     function would have to be called while the thread is executing
+     fork, it would have to happen in a signal handler.  But this is
+     no allowed, pthread_kill is not guaranteed to be async-safe.  */
+  int val;
+#if __ASSUME_TGKILL
+  val = INTERNAL_SYSCALL (tgkill, err, 3, THREAD_GETMEM (THREAD_SELF, pid),
+			  pd->tid, signo);
+#else
+# ifdef __NR_tgkill
+  val = INTERNAL_SYSCALL (tgkill, err, 3, THREAD_GETMEM (THREAD_SELF, pid),
+			  pd->tid, signo);
+  if (INTERNAL_SYSCALL_ERROR_P (val, err)
+      && INTERNAL_SYSCALL_ERRNO (val, err) == ENOSYS)
+# endif
+    val = INTERNAL_SYSCALL (tkill, err, 2, pd->tid, signo);
+#endif
+
+  return (INTERNAL_SYSCALL_ERROR_P (val, err)
+	  ? INTERNAL_SYSCALL_ERRNO (val, err) : 0);
+}
+strong_alias (__pthread_kill, pthread_kill)