Add a stevedore for synthetic pages.

The storage from this stevedore is backed by an autoextending vsb, which
can be used to generate synthetic pages into.



git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@3025 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/Makefile.am

@@ -51,6 +51,7 @@ varnishd_SOURCES = \
 	stevedore.c \
 	storage_file.c \
 	storage_malloc.c \
+	storage_synth.c \
 	tcp.c \
 	varnishd.c
 

bin/varnishd/cache_main.c

@@ -121,6 +121,7 @@ child_main(void)
 
 	VCA_Init();
 
+	SMS_Init();
 	STV_open();
 
 	VSL_stats->start_time = (time_t)TIM_real();

bin/varnishd/stevedore.c

@@ -83,7 +83,7 @@ STV_trim(const struct storage *st, size_t size)
 }
 
 void
-STV_free(const struct storage *st)
+STV_free(struct storage *st)
 {
 
 	CHECK_OBJ_NOTNULL(st, STORAGE_MAGIC);

bin/varnishd/stevedore.h

@@ -39,7 +39,7 @@ typedef void storage_init_f(struct stevedore *, int ac, char * const *av);
 typedef void storage_open_f(const struct stevedore *);
 typedef struct storage *storage_alloc_f(struct stevedore *, size_t size);
 typedef void storage_trim_f(const struct storage *, size_t size);
-typedef void storage_free_f(const struct storage *);
+typedef void storage_free_f(struct storage *);
 
 struct stevedore {
 	unsigned		magic;
@@ -59,6 +59,9 @@ struct stevedore {
 
 struct storage *STV_alloc(struct sess *sp, size_t size);
 void STV_trim(const struct storage *st, size_t size);
-void STV_free(const struct storage *st);
+void STV_free(struct storage *st);
 void STV_add(const struct stevedore *stv, int ac, char * const *av);
 void STV_open(void);
+
+/* Synthetic Storage */
+void SMS_Init(void);

bin/varnishd/storage_file.c

@@ -681,7 +681,7 @@ smf_trim(const struct storage *s, size_t size)
 /*--------------------------------------------------------------------*/
 
 static void
-smf_free(const struct storage *s)
+smf_free(struct storage *s)
 {
 	struct smf *smf;
 	struct smf_sc *sc;

bin/varnishd/storage_malloc.c

@@ -86,7 +86,7 @@ sma_alloc(struct stevedore *st, size_t size)
 }
 
 static void
-sma_free(const struct storage *s)
+sma_free(struct storage *s)
 {
 	struct sma *sma;