-/*
- * Copyright (C) 2007-2009 Andre Noll <maan@systemlinux.org>
- *
- * 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 */
struct signal_task {
/** The signal pipe. */
int fd;
- /** The number of the most recent signal. */
- int signum;
/** The associated task structure. */
- struct task task;
+ struct task *task;
};
-int para_signal_init(void);
+/**
+ * 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);
+}
+
+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(void);
-void para_signal_shutdown(void);
+int para_next_signal(fd_set *rfds);
+void signal_shutdown(struct signal_task *st);
+void para_block_signal(int sig);
+void para_unblock_signal(int sig);