1 files changed, 48 insertions, 0 deletions
diff --git a/redo/modalqueue.c b/redo/modalqueue.c
new file mode 100644
index 0000000..7474c95
--- /dev/null
+++ b/redo/modalqueue.c
@@ -0,0 +1,48 @@
+// 19 august 2014
+
+#include <stdlib.h>
+#include "modalqueue.h"
+
+static struct {
+	int inmodal;
+	void **queue;
+	size_t len;
+	size_t cap;
+} mq = { 0, NULL, 0, 0 };
+
+void beginModal(void)
+{
+	mq.inmodal = 1;
+	if (mq.queue == NULL) {
+		mq.cap = 128;
+		mq.queue = (void **) malloc(mq.cap * sizeof (void *));
+		if (mq.queue == NULL)
+			abort();//TODO
+		mq.len = 0;
+	}
+}
+
+void endModal(void)
+{
+	size_t i;
+
+	mq.inmodal = 0;
+	for (i = 0; i < mq.len; i++)
+		doissue(mq.queue[i]);
+	mq.len = 0;
+}
+
+int queueIfModal(void *what)
+{
+	if (!mq.inmodal)
+		return 0;
+	mq.queue[mq.len] = what;
+	mq.len++;
+	if (mq.len >= mq.cap) {
+		mq.cap *= 2;
+		mq.queue = (void **) realloc(mq.queue, mq.cap * sizeof (void *));
+		if (mq.queue == NULL)
+			abort();//TODO
+	}
+	return 1;
+}