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-rw-r--r--libpthread/linuxthreads/sighandler.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/libpthread/linuxthreads/sighandler.c b/libpthread/linuxthreads/sighandler.c
new file mode 100644
index 000000000..9dd3e228f
--- /dev/null
+++ b/libpthread/linuxthreads/sighandler.c
@@ -0,0 +1,71 @@
+/* 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 = check_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 = check_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) { }