diff --git a/configure.in b/configure.in
index 3244cecde7..c6dc7ea503 100644
--- a/configure.in
+++ b/configure.in
@@ -34,13 +34,20 @@ AC_ARG_ENABLE(iphone,
CFLAGS="$CFLAGS -D__DARWIN_UNIX03 -DIPHONE"
fi])
+#XXXX020 We should make these enabled or not, before 0.2.0.x-final
AC_ARG_ENABLE(cell-pool,
AS_HELP_STRING(--disable-cell-pool, disable pool allocator for cells))
+AC_ARG_ENABLE(buf-freelists,
+ AS_HELP_STRING(--disable-buf-freelists, disable freelists for buffer RAM))
if test x$enable_cell_pool != xno; then
AC_DEFINE(ENABLE_CELL_POOL, 1,
[Defined if we try to use the pool allocator for queued cells])
fi
+if test x$enable_buf_freelists != xno; then
+ AC_DEFINE(ENABLE_BUF_FREELISTS, 1,
+ [Defined if we try to use freelists for buffer RAM chunks])
+fi
AC_ARG_ENABLE(transparent,
AS_HELP_STRING(--disable-transparent, disable transparent proxy support),
diff --git a/src/or/buffers.c b/src/or/buffers.c
index 8d8059e1fd..57ebc19c63 100644
--- a/src/or/buffers.c
+++ b/src/or/buffers.c
@@ -95,6 +95,7 @@ chunk_repack(chunk_t *chunk)
chunk->data = &chunk->mem[0];
}
+#ifdef ENABLE_BUF_FREELISTS
/** A freelist of chunks. */
typedef struct chunk_freelist_t {
size_t alloc_size; /**< What size chunks does this freelist hold? */
@@ -188,6 +189,24 @@ chunk_new_with_alloc_size(size_t alloc)
ch->data = &ch->mem[0];
return ch;
}
+#else
+static void
+chunk_free(chunk_t *chunk)
+{
+ tor_free(chunk);
+}
+static INLINE chunk_t *
+chunk_new_with_alloc_size(size_t alloc)
+{
+ chunk_t *ch;
+ ch = tor_malloc_roundup(&alloc);
+ ch->next = NULL;
+ ch->datalen = 0;
+ ch->memlen = CHUNK_SIZE_WITH_ALLOC(alloc);
+ ch->data = &ch->mem[0];
+ return ch;
+}
+#endif
/** Allocate a new chunk with memory size of sz. */
#define chunk_new_with_capacity(sz) \
@@ -221,6 +240,7 @@ static INLINE size_t
preferred_chunk_size(size_t target)
{
/* XXXX020 use log2 code, maybe. */
+ /* XXXX020 or make sizing code more fine-grained! */
size_t sz = MIN_CHUNK_ALLOC;
while (CHUNK_SIZE_WITH_ALLOC(sz) < target) {
sz <<= 1;
@@ -233,6 +253,7 @@ preferred_chunk_size(size_t target)
void
buf_shrink_freelists(int free_all)
{
+#ifdef ENABLE_BUF_FREELISTS
int i;
for (i = 0; freelists[i].alloc_size; ++i) {
int slack = freelists[i].slack;
@@ -267,6 +288,9 @@ buf_shrink_freelists(int free_all)
freelists[i].lowest_length = freelists[i].cur_length;
assert_freelist_ok(&freelists[i]);
}
+#else
+ (void) free_all;
+#endif
}
/** Describe the current status of the freelists at log level severity.
@@ -274,6 +298,7 @@ buf_shrink_freelists(int free_all)
void
buf_dump_freelist_sizes(int severity)
{
+#ifdef ENABLE_BUF_FREELISTS
int i;
log(severity, LD_MM, "====== Buffer freelists:");
for (i = 0; freelists[i].alloc_size; ++i) {
@@ -290,6 +315,9 @@ buf_dump_freelist_sizes(int severity)
}
log(severity, LD_MM, U64_FORMAT" allocations in non-freelist sizes",
U64_PRINTF_ARG(n_freelist_miss));
+#else
+ (void)severity;
+#endif
}
/** Magic value for buf_t.magic, to catch pointer errors. */
@@ -1612,6 +1640,7 @@ assert_buf_ok(buf_t *buf)
}
}
+#ifdef ENABLE_BUF_FREELISTS
/** Log an error and exit if fl is corrupted.
*/
static void
@@ -1629,4 +1658,5 @@ assert_freelist_ok(chunk_freelist_t *fl)
tor_assert(n >= fl->lowest_length);
tor_assert(n <= fl->max_length);
}
+#endif