From 12fd793a46d1695bedb96a5d9531dfd9f3efd7be Mon Sep 17 00:00:00 2001
From: Guus Sliepen <guus@meshlink.io>
Date: Sun, 25 May 2014 16:23:51 +0200
Subject: [PATCH] Remove support for UNIX signals in the event library.

---
 src/event.c | 50 +-------------------------------------------------
 src/event.h | 18 +-----------------
 2 files changed, 2 insertions(+), 66 deletions(-)

diff --git a/src/event.c b/src/event.c
index d23f43bb..cfc6d899 100644
--- a/src/event.c
+++ b/src/event.c
@@ -1,5 +1,5 @@
 /*
-    event.c -- I/O, timeout and signal event handling
+    event.c -- I/O and timeout event handling
     Copyright (C) 2014 Guus Sliepen <guus@meshlink.io>
 
     This program is free software; you can redistribute it and/or modify
@@ -117,49 +117,6 @@ void timeout_del(event_loop_t *loop, timeout_t *timeout) {
 	timeout->tv = (struct timeval){0, 0};
 }
 
-static int signal_compare(const signal_t *a, const signal_t *b) {
-	return (int)a->signum - (int)b->signum;
-}
-
-static void signalio_handler(event_loop_t *loop, void *data, int flags) {
-	unsigned char signum;
-	if(read(loop->pipefd[0], &signum, 1) != 1)
-		return;
-
-	signal_t *sig = splay_search(&loop->signals, &((signal_t){.signum = signum}));
-	if(sig)
-		sig->cb(loop, sig->data);
-}
-
-static void pipe_init(event_loop_t *loop) {
-	if(!pipe(loop->pipefd))
-		io_add(loop, &loop->signalio, signalio_handler, NULL, loop->pipefd[0], IO_READ);
-}
-
-void signal_add(event_loop_t *loop, signal_t *sig, signal_cb_t cb, void *data, uint8_t signum) {
-	if(sig->cb)
-		return;
-
-	sig->cb = cb;
-	sig->data = data;
-	sig->signum = signum;
-	sig->node.data = sig;
-
-	if(loop->pipefd[0] == -1)
-		pipe_init(loop);
-
-	if(!splay_insert_node(&loop->signals, &sig->node))
-		abort();
-}
-
-void signal_del(event_loop_t *loop, signal_t *sig) {
-	if(!sig->cb)
-		return;
-
-	splay_unlink_node(&loop->signals, &sig->node);
-	sig->cb = NULL;
-}
-
 bool event_loop_run(event_loop_t *loop) {
 	loop->running = true;
 
@@ -230,9 +187,6 @@ void event_loop_stop(event_loop_t *loop) {
 void event_loop_init(event_loop_t *loop) {
 	loop->ios.compare = (splay_compare_t)io_compare;
 	loop->timeouts.compare = (splay_compare_t)timeout_compare;
-	loop->signals.compare = (splay_compare_t)signal_compare;
-	loop->pipefd[0] = -1;
-	loop->pipefd[1] = -1;
 	gettimeofday(&loop->now, NULL);
 }
 
@@ -241,6 +195,4 @@ void event_loop_exit(event_loop_t *loop) {
 		splay_free_node(&loop->ios, node);
 	for splay_each(timeout_t, timeout, &loop->timeouts)
 		splay_free_node(&loop->timeouts, node);
-	for splay_each(signal_t, signal, &loop->signals)
-		splay_free_node(&loop->signals, node);
 }
diff --git a/src/event.h b/src/event.h
index fa21bd0f..90a59056 100644
--- a/src/event.h
+++ b/src/event.h
@@ -1,5 +1,5 @@
 /*
-    event.h -- I/O, timeout and signal event handling
+    event.h -- I/O and timeout event handling
     Copyright (C) 2014 Guus Sliepen <guus@meshlink.io>
 
     This program is free software; you can redistribute it and/or modify
@@ -29,7 +29,6 @@ typedef struct event_loop_t event_loop_t;
 
 typedef void (*io_cb_t)(event_loop_t *loop, void *data, int flags);
 typedef void (*timeout_cb_t)(event_loop_t *loop, void *data);
-typedef void (*signal_cb_t)(event_loop_t *loop, void *data);
 
 typedef struct io_t {
 	int fd;
@@ -46,13 +45,6 @@ typedef struct timeout_t {
 	struct splay_node_t node;
 } timeout_t;
 
-typedef struct signal_t {
-	int signum;
-	signal_cb_t cb;
-	void *data;
-	struct splay_node_t node;
-} signal_t;
-
 struct event_loop_t {
 	fd_set readfds;
 	fd_set writefds;
@@ -62,10 +54,6 @@ struct event_loop_t {
 	
 	splay_tree_t ios;
 	splay_tree_t timeouts;
-	splay_tree_t signals;
-
-	io_t signalio;
-	int pipefd[2];
 
 	void *data;
 };
@@ -78,10 +66,6 @@ extern void timeout_add(event_loop_t *loop, timeout_t *timeout, timeout_cb_t cb,
 extern void timeout_del(event_loop_t *loop, timeout_t *timeout);
 extern void timeout_set(event_loop_t *loop, timeout_t *timeout, struct timeval *tv);
 
-extern void signal_add(event_loop_t *loop, signal_t *sig, signal_cb_t cb, void *data, uint8_t signum);
-extern void signal_trigger(event_loop_t *loop, signal_t *sig);
-extern void signal_del(event_loop_t *loop, signal_t *sig);
-
 extern void event_loop_init(event_loop_t *loop);
 extern void event_loop_exit(event_loop_t *loop);
 extern bool event_loop_run(event_loop_t *loop);
-- 
2.39.5