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-rw-r--r--qemu/libcacard/event.c103
1 files changed, 103 insertions, 0 deletions
diff --git a/qemu/libcacard/event.c b/qemu/libcacard/event.c
new file mode 100644
index 000000000..63f4057fe
--- /dev/null
+++ b/qemu/libcacard/event.c
@@ -0,0 +1,103 @@
+/*
+ * event queue implementation.
+ *
+ * This code is licensed under the GNU LGPL, version 2.1 or later.
+ * See the COPYING.LIB file in the top-level directory.
+ */
+
+#include "glib-compat.h"
+
+#include "vcard.h"
+#include "vreader.h"
+#include "vevent.h"
+
+VEvent *
+vevent_new(VEventType type, VReader *reader, VCard *card)
+{
+ VEvent *new_vevent;
+
+ new_vevent = g_new(VEvent, 1);
+ new_vevent->next = NULL;
+ new_vevent->type = type;
+ new_vevent->reader = vreader_reference(reader);
+ new_vevent->card = vcard_reference(card);
+
+ return new_vevent;
+}
+
+void
+vevent_delete(VEvent *vevent)
+{
+ if (vevent == NULL) {
+ return;
+ }
+ vreader_free(vevent->reader);
+ vcard_free(vevent->card);
+ g_free(vevent);
+}
+
+/*
+ * VEvent queue management
+ */
+
+static VEvent *vevent_queue_head;
+static VEvent *vevent_queue_tail;
+static CompatGMutex vevent_queue_lock;
+static CompatGCond vevent_queue_condition;
+
+void vevent_queue_init(void)
+{
+ vevent_queue_head = vevent_queue_tail = NULL;
+}
+
+void
+vevent_queue_vevent(VEvent *vevent)
+{
+ vevent->next = NULL;
+ g_mutex_lock(&vevent_queue_lock);
+ if (vevent_queue_head) {
+ assert(vevent_queue_tail);
+ vevent_queue_tail->next = vevent;
+ } else {
+ vevent_queue_head = vevent;
+ }
+ vevent_queue_tail = vevent;
+ g_cond_signal(&vevent_queue_condition);
+ g_mutex_unlock(&vevent_queue_lock);
+}
+
+/* must have lock */
+static VEvent *
+vevent_dequeue_vevent(void)
+{
+ VEvent *vevent = NULL;
+ if (vevent_queue_head) {
+ vevent = vevent_queue_head;
+ vevent_queue_head = vevent->next;
+ vevent->next = NULL;
+ }
+ return vevent;
+}
+
+VEvent *vevent_wait_next_vevent(void)
+{
+ VEvent *vevent;
+
+ g_mutex_lock(&vevent_queue_lock);
+ while ((vevent = vevent_dequeue_vevent()) == NULL) {
+ g_cond_wait(&vevent_queue_condition, &vevent_queue_lock);
+ }
+ g_mutex_unlock(&vevent_queue_lock);
+ return vevent;
+}
+
+VEvent *vevent_get_next_vevent(void)
+{
+ VEvent *vevent;
+
+ g_mutex_lock(&vevent_queue_lock);
+ vevent = vevent_dequeue_vevent();
+ g_mutex_unlock(&vevent_queue_lock);
+ return vevent;
+}
+