1 files changed, 112 insertions, 0 deletions
diff --git a/src/g_unix_signal.c b/src/g_unix_signal.c
new file mode 100644
index 0000000..4d6a1a1
--- /dev/null
+++ b/src/g_unix_signal.c
@@ -0,0 +1,112 @@
+#define _POSIX_SOURCE
+#include <signal.h>
+#include <glib.h>
+
+static GPtrArray *signal_infos = NULL;
+
+typedef struct _GUnixSignalInfo {
+	guint source_id;
+	GMainContext *context;
+	gboolean triggered;
+	gint signum;
+} GUnixSignalInfo;
+
+typedef struct _GUnixSignalSource {
+	GSource source;
+	GUnixSignalInfo *info;
+} GUnixSignalSource;
+
+static inline GUnixSignalInfo* get_signal_info(guint index)
+{
+	return (GUnixSignalInfo*)g_ptr_array_index(signal_infos, index);
+}
+
+static void handler(gint signum) {
+	g_assert(signal_infos != NULL);
+	for (guint i = 0; i < signal_infos->len; ++i)
+		if (get_signal_info(i)->signum == signum)
+			get_signal_info(i)->triggered = TRUE;
+	sigaction(signum, &(struct sigaction){handler}, NULL);
+}
+
+static gboolean check(GSource *source)
+{
+	GUnixSignalSource *signal_source = (GUnixSignalSource*) source;
+	return signal_source->info->triggered;
+}
+
+static gboolean prepare(GSource *source, gint *timeout_)
+{
+	GUnixSignalSource *signal_source = (GUnixSignalSource*) source;
+	if (signal_source->info->context == NULL) {
+		g_main_context_ref(signal_source->info->context = g_source_get_context(source));
+		signal_source->info->source_id = g_source_get_id(source);
+	}
+
+	*timeout_ = -1;
+	return signal_source->info->triggered;
+}
+
+static gboolean dispatch(GSource *source, GSourceFunc callback, gpointer user_data)
+{
+	GUnixSignalSource *signal_source = (GUnixSignalSource*) source;
+	signal_source->info->triggered = FALSE;
+	return callback(user_data) ? TRUE : FALSE;
+}
+static void finalize(GSource *source)
+{
+	GUnixSignalSource *signal_source = (GUnixSignalSource*) source;
+	sigaction(signal_source->info->signum, &(struct sigaction){NULL}, NULL);
+	g_main_context_unref(signal_source->info->context);
+	g_ptr_array_remove_fast(signal_infos, signal_source->info);
+	if (signal_infos->len == 0)
+		signal_infos = (GPtrArray*) g_ptr_array_free(signal_infos, TRUE);
+	g_free(signal_source->info);
+
+}
+static GSourceFuncs SourceFuncs = 
+{
+	.prepare  = prepare,
+	.check    = check,
+	.dispatch = dispatch,
+	.finalize = finalize,
+	.closure_callback = NULL, .closure_marshal = NULL
+};
+
+static void g_unix_signal_source_init(GSource *source, gint signum)
+{
+	GUnixSignalSource *signal_source = (GUnixSignalSource *) source;
+	signal_source->info = g_new(GUnixSignalInfo, 1);
+	signal_source->info->triggered = FALSE;
+	signal_source->info->signum    = signum;
+	signal_source->info->context   = NULL;
+
+	if (signal_infos == NULL)
+		signal_infos = g_ptr_array_new();
+	g_ptr_array_add(signal_infos, signal_source->info);
+}
+
+GSource *g_unix_signal_source_new(gint signum)
+{
+	GSource *source = g_source_new(&SourceFuncs, sizeof(GUnixSignalSource));
+	g_unix_signal_source_init(source, signum);
+	sigaction(signum, &(struct sigaction){handler}, NULL);
+	return source;
+}
+
+guint g_unix_signal_add_full(gint priority, gint signum, GSourceFunc function, gpointer data, GDestroyNotify notify)
+{
+	g_return_val_if_fail(function != NULL, 0);
+	GSource *source = g_unix_signal_source_new(signum);
+	if (priority != G_PRIORITY_DEFAULT)
+		g_source_set_priority (source, priority);
+	g_source_set_callback(source, function, data, notify);
+	guint id = g_source_attach(source, NULL);
+	g_source_unref(source);
+	return id;
+}
+
+guint g_unix_signal_add(gint signum, GSourceFunc function, gpointer data)
+{
+	return g_unix_signal_add_full(G_PRIORITY_DEFAULT, signum, function, data, NULL);
+}