cpp->c and expr support configurable generation of literal_db or regex_db

src/maat_garbage_collection.c

@@ -0,0 +1,105 @@
+/*
+**********************************************************************************************
+*	File: maat_garbage_collection.h
+*   Description:
+*	Authors: Zhengchao <zhengchao@geedgenetworks.com>
+*	Date:    2022-10-31
+*   Copyright: (c) 2018-2022 Geedge Networks, Inc. All rights reserved.
+***********************************************************************************************
+*/
+
+#include <time.h>
+#include <stdlib.h>
+#include <sys/queue.h>
+#include <assert.h>
+
+#include "maat_utils.h"
+
+struct maat_garbage_bag {
+	time_t create_time;
+	int timeout;
+	int ok_times;
+	void *garbage;
+	void (* garbage_free)(void *garbage);
+	TAILQ_ENTRY(maat_garbage_bag) entries;
+};
+TAILQ_HEAD(maat_garbage_q, maat_garbage_bag);
+
+struct maat_garbage_bin {
+	struct maat_garbage_q garbage_q;
+	size_t bag_cnt;
+	int timeout_seconds;
+};
+
+struct maat_garbage_bin *maat_garbage_bin_new(int default_timeout)
+{
+	struct maat_garbage_bin* bin = ALLOC(struct maat_garbage_bin, 1);
+
+	TAILQ_INIT(&bin->garbage_q);
+	bin->timeout_seconds = default_timeout;
+
+	return bin;
+}
+
+void maat_garbage_bin_free(struct maat_garbage_bin* bin)
+{
+	struct maat_garbage_bag *p = NULL;
+
+	while ((p = TAILQ_FIRST(&bin->garbage_q)) != NULL) {
+		p->garbage_free(p->garbage);
+		TAILQ_REMOVE(&bin->garbage_q, p, entries);
+		FREE(p);
+		bin->bag_cnt--;
+	}
+
+	FREE(bin);
+}
+
+size_t  maat_garbage_bin_get_size(struct maat_garbage_bin* bin)
+{
+	return bin->bag_cnt;
+}
+
+void maat_garbage_bagging(struct maat_garbage_bin* bin, void* garbage, 
+                          void (* func)(void *))
+{
+	struct maat_garbage_bag *bag = ALLOC(struct maat_garbage_bag, 1);
+
+	bag->create_time = time(NULL);
+	bag->timeout = bin->timeout_seconds;
+	bag->garbage = garbage;
+	bag->garbage_free = func;
+	TAILQ_INSERT_TAIL(&bin->garbage_q, bag, entries);
+	bin->bag_cnt++;
+}
+void maat_garbage_collect_routine(struct maat_garbage_bin* bin)
+{
+	struct maat_garbage_bag *p = NULL, *tmp = NULL;
+	size_t n_clollected = 0, n_bag = 0;
+	time_t now = time(NULL);
+
+	for (p = TAILQ_FIRST(&bin->garbage_q); p != NULL; p = tmp) {
+		tmp = TAILQ_NEXT(p, entries);
+		if ((now - p->create_time) > p->timeout || p->timeout == 0) {
+			p->garbage_free(p->garbage);
+			TAILQ_REMOVE(&bin->garbage_q, p, entries);
+			FREE(p);
+			n_clollected++;
+		}
+		n_bag++;
+	}
+
+	assert(bin->bag_cnt == n_bag);
+	bin->bag_cnt -= n_clollected;
+}
+
+void maat_garbage_collect_by_force(struct maat_garbage_bin* bin)
+{
+	struct maat_garbage_bag *p = NULL;
+	while ((p = TAILQ_FIRST(&bin->garbage_q)) != NULL) {
+		p->garbage_free(p->garbage);
+		TAILQ_REMOVE(&bin->garbage_q, p, entries);
+		FREE(p);
+		bin->bag_cnt--;
+	}
+}