X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=signal.h;h=e5532ded5a9378619f7951708b49c5b38bf52d18;hp=643c148f3d9ec528c6a78cbf290c8c8422c25d78;hb=f8cc8caab7176a65731520f3130dc059e5d5773e;hpb=0c5e3f4c2f95d6a73bf840bc82dd0a1ce91e4016

diff --git a/signal.h b/signal.h
index 643c148f..e5532ded 100644
--- a/signal.h
+++ b/signal.h
@@ -1,8 +1,4 @@
-/*
- * Copyright (C) 2007 Andre Noll <maan@tuebingen.mpg.de>
- *
- * Licensed under the GPL v2. For licencing details see COPYING.
- */
+/* Copyright (C) 2007 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
 
 /** \file signal.h exported symbols from signal.c */
 
@@ -16,17 +12,33 @@ struct signal_task {
 	struct task *task;
 };
 
+/**
+ * A generic pre-select method for signal tasks.
+ *
+ * \param s Passed to para_fd_set().
+ * \param context Signal task pointer.
+ *
+ * This convenience helper is called from several programs which need to handle
+ * signals, including para_server and para_audiod. These programs define a
+ * signal task structure and set its ->pre_select method to this function which
+ * adds the file descriptor of the signal task to the set of descriptors to be
+ * watched in the next select() call.
+ *
+ * Although the second parameter must be in fact a pointer to a signal_task
+ * structure, the parameter is specified as void * here to match the
+ * ->pre_select method of struct task.
+ */
 _static_inline_ void signal_pre_select(struct sched *s, void *context)
 {
 	struct signal_task *st = context;
 	para_fd_set(st->fd, &s->rfds, &s->max_fileno);
 }
 
-int para_signal_init(void);
+struct signal_task *signal_init_or_die(void);
 void para_sigaction(int sig, void (*handler)(int));
 void para_install_sighandler(int);
 int para_reap_child(pid_t *pid);
 int para_next_signal(fd_set *rfds);
-void para_signal_shutdown(void);
+void signal_shutdown(struct signal_task *st);
 void para_block_signal(int sig);
 void para_unblock_signal(int sig);