Signal handler wrappers.
authordrepper <drepper>
Fri, 3 May 2002 07:36:37 +0000 (07:36 +0000)
committerdrepper <drepper>
Fri, 3 May 2002 07:36:37 +0000 (07:36 +0000)
linuxthreads/sighandler.c [new file with mode: 0644]

diff --git a/linuxthreads/sighandler.c b/linuxthreads/sighandler.c
new file mode 100644 (file)
index 0000000..ab8b38e
--- /dev/null
@@ -0,0 +1,69 @@
+/* Linuxthreads - a simple clone()-based implementation of Posix        */
+/* threads for Linux.                                                   */
+/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr)              */
+/*                                                                      */
+/* This program is free software; you can redistribute it and/or        */
+/* modify it under the terms of the GNU Library General Public License  */
+/* as published by the Free Software Foundation; either version 2       */
+/* of the License, or (at your option) any later version.               */
+/*                                                                      */
+/* This program 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 Library General Public License for more details.                 */
+
+/* Signal handlers */
+
+#include "internals.h"
+
+
+/* The wrapper around user-provided signal handlers */
+void __pthread_sighandler(int signo, SIGCONTEXT ctx)
+{
+  pthread_descr self;
+  char * in_sighandler;
+  self = thread_self();
+  /* If we're in a sigwait operation, just record the signal received
+     and return without calling the user's handler */
+  if (THREAD_GETMEM(self, p_sigwaiting)) {
+    THREAD_SETMEM(self, p_sigwaiting, 0);
+    THREAD_SETMEM(self, p_signal, signo);
+    return;
+  }
+  /* Record that we're in a signal handler and call the user's
+     handler function */
+  in_sighandler = THREAD_GETMEM(self, p_in_sighandler);
+  if (in_sighandler == NULL)
+    THREAD_SETMEM(self, p_in_sighandler, CURRENT_STACK_FRAME);
+  CALL_SIGHANDLER(__sighandler[signo].old, signo, ctx);
+  if (in_sighandler == NULL)
+    THREAD_SETMEM(self, p_in_sighandler, NULL);
+}
+
+/* The same, this time for real-time signals.  */
+void __pthread_sighandler_rt(int signo, struct siginfo *si,
+                            struct ucontext *uc)
+{
+  pthread_descr self;
+  char * in_sighandler;
+  self =  thread_self();
+  /* If we're in a sigwait operation, just record the signal received
+     and return without calling the user's handler */
+  if (THREAD_GETMEM(self, p_sigwaiting)) {
+    THREAD_SETMEM(self, p_sigwaiting, 0);
+    THREAD_SETMEM(self, p_signal, signo);
+    return;
+  }
+  /* Record that we're in a signal handler and call the user's
+     handler function */
+  in_sighandler = THREAD_GETMEM(self, p_in_sighandler);
+  if (in_sighandler == NULL)
+    THREAD_SETMEM(self, p_in_sighandler, CURRENT_STACK_FRAME);
+  __sighandler[signo].rt(signo, si, uc);
+  if (in_sighandler == NULL)
+    THREAD_SETMEM(self, p_in_sighandler, NULL);
+}
+
+
+/* A signal handler that does nothing */
+void __pthread_null_sighandler(int sig) { }