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git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@3029 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/storage_synth.c

+/*-
+ * Copyright (c) 2008 Linpro AS
+ * All rights reserved.
+ *
+ * Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $Id: storage_malloc.c 2955 2008-07-19 09:24:07Z phk $
+ *
+ * Storage method for synthetic content, based on vsb.
+ */
+
+#include "config.h"
+
+#include <sys/types.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <pthread.h>
+
+#include "shmlog.h"
+#include "cache.h"
+#include "vsb.h"
+#include "stevedore.h"
+
+static MTX			sms_mtx;
+
+static void
+sms_free(struct storage *sto)
+{
+
+	CHECK_OBJ_NOTNULL(sto, STORAGE_MAGIC);
+	LOCK(&sms_mtx);
+	VSL_stats->sms_nobj--;
+	VSL_stats->sms_nbytes -= sto->len;
+	VSL_stats->sms_bfree += sto->len;
+	UNLOCK(&sms_mtx);
+	vsb_delete(sto->priv);
+	free(sto);
+}
+
+void
+SMS_Init(void)
+{
+
+	AZ(pthread_mutex_init(&sms_mtx, NULL));
+}
+
+struct stevedore sms_stevedore = {
+	.magic	=	STEVEDORE_MAGIC,
+	.name	=	"synth",
+	.free	=	sms_free,
+};
+
+struct vsb *
+SMS_Makesynth(struct object *obj)
+{
+	struct storage *sto;
+	struct vsb *vsb;
+
+	CHECK_OBJ_NOTNULL(obj, OBJECT_MAGIC);
+	HSH_Freestore(obj);
+	obj->len = 0;
+
+	LOCK(&sms_mtx);
+	VSL_stats->sms_nreq++;
+	VSL_stats->sms_nobj++;
+	UNLOCK(&sms_mtx);
+
+	sto = calloc(sizeof *sto, 1);
+	XXXAN(sto);
+	if (sto == NULL)
+		return (NULL);
+	vsb = vsb_newauto();
+	XXXAN(vsb);
+	sto->priv = vsb;
+	sto->len = 0;
+	sto->space = 0;
+	sto->fd = -1;
+	sto->stevedore = &sms_stevedore;
+	sto->magic = STORAGE_MAGIC;
+
+	VTAILQ_INSERT_TAIL(&obj->store, sto, list);
+	return (vsb);
+}
+
+void
+SMS_Finish(struct object *obj)
+{
+	struct storage *sto;
+	struct vsb *vsb;
+
+	CHECK_OBJ_NOTNULL(obj, OBJECT_MAGIC);
+	sto = VTAILQ_FIRST(&obj->store);
+	assert(sto->stevedore == &sms_stevedore);
+	vsb = sto->priv;
+	vsb_finish(vsb);
+	AZ(vsb_overflowed(vsb));
+
+	sto->ptr = (void*)vsb_data(vsb);
+	sto->len = vsb_len(vsb);
+	sto->space = vsb_len(vsb);
+	obj->len = sto->len;
+	VSL_stats->sms_nbytes += sto->len;
+	VSL_stats->sms_balloc += sto->len;
+}