Unit tests for cell queues.

This removes some INLINE markers from functions that probably didn't
need them.

src/or/relay.c

@@ -2089,7 +2089,7 @@ packed_cell_free_unchecked(packed_cell_t *cell)
 }
 
 /** Allocate and return a new packed_cell_t. */
-static INLINE packed_cell_t *
+STATIC packed_cell_t *
 packed_cell_new(void)
 {
   ++total_cells_allocated;
@@ -2100,6 +2100,8 @@ packed_cell_new(void)
 void
 packed_cell_free(packed_cell_t *cell)
 {
+  if (!cell)
+    return;
   packed_cell_free_unchecked(cell);
 }
 
@@ -2210,7 +2212,7 @@ cell_queue_clear(cell_queue_t *queue)
 
 /** Extract and return the cell at the head of <b>queue</b>; return NULL if
  * <b>queue</b> is empty. */
-static INLINE packed_cell_t *
+STATIC packed_cell_t *
 cell_queue_pop(cell_queue_t *queue)
 {
   packed_cell_t *cell = TOR_SIMPLEQ_FIRST(&queue->head);

src/or/relay.h

@@ -82,6 +82,8 @@ int relay_crypt(circuit_t *circ, cell_t *cell, cell_direction_t cell_direction,
 #ifdef RELAY_PRIVATE
 STATIC int connected_cell_parse(const relay_header_t *rh, const cell_t *cell,
                          tor_addr_t *addr_out, int *ttl_out);
+STATIC packed_cell_t *packed_cell_new(void);
+STATIC packed_cell_t *cell_queue_pop(cell_queue_t *queue);
 #endif
 
 #endif

src/test/include.am

@@ -22,6 +22,7 @@ src_test_test_SOURCES = \
 	src/test/test_circuitlist.c \
 	src/test/test_containers.c \
 	src/test/test_crypto.c \
+	src/test/test_cell_queue.c \
 	src/test/test_data.c \
 	src/test/test_dir.c \
 	src/test/test_introduce.c \

src/test/test.c

@@ -2133,6 +2133,7 @@ extern struct testcase_t introduce_tests[];
 extern struct testcase_t replaycache_tests[];
 extern struct testcase_t cell_format_tests[];
 extern struct testcase_t circuitlist_tests[];
+extern struct testcase_t cell_queue_tests[];
 
 static struct testgroup_t testgroups[] = {
   { "", test_array },
@@ -2142,6 +2143,7 @@ static struct testgroup_t testgroups[] = {
   { "container/", container_tests },
   { "util/", util_tests },
   { "cellfmt/", cell_format_tests },
+  { "cellqueue/", cell_queue_tests },
   { "dir/", dir_tests },
   { "dir/md/", microdesc_tests },
   { "pt/", pt_tests },

src/test/test_cell_queue.c

@@ -0,0 +1,103 @@
+/* Copyright (c) 2013, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+#define CIRCUITLIST_PRIVATE
+#define RELAY_PRIVATE
+#include "or.h"
+#include "circuitlist.h"
+#include "relay.h"
+#include "test.h"
+
+static void
+test_cq_manip(void *arg)
+{
+  packed_cell_t *pc1=NULL, *pc2=NULL, *pc3=NULL, *pc4=NULL, *pc_tmp=NULL;
+  cell_queue_t cq;
+  cell_t cell;
+  (void) arg;
+
+  init_cell_pool();
+  cell_queue_init(&cq);
+  tt_int_op(cq.n, ==, 0);
+
+  pc1 = packed_cell_new();
+  pc2 = packed_cell_new();
+  pc3 = packed_cell_new();
+  pc4 = packed_cell_new();
+  tt_assert(pc1 && pc2 && pc3 && pc4);
+
+  tt_ptr_op(NULL, ==, cell_queue_pop(&cq));
+
+  /* Add and remove a singleton. */
+  cell_queue_append(&cq, pc1);
+  tt_int_op(cq.n, ==, 1);
+  tt_ptr_op(pc1, ==, cell_queue_pop(&cq));
+  tt_int_op(cq.n, ==, 0);
+
+  /* Add and remove four items */
+  cell_queue_append(&cq, pc4);
+  cell_queue_append(&cq, pc3);
+  cell_queue_append(&cq, pc2);
+  cell_queue_append(&cq, pc1);
+  tt_int_op(cq.n, ==, 4);
+  tt_ptr_op(pc4, ==, cell_queue_pop(&cq));
+  tt_ptr_op(pc3, ==, cell_queue_pop(&cq));
+  tt_ptr_op(pc2, ==, cell_queue_pop(&cq));
+  tt_ptr_op(pc1, ==, cell_queue_pop(&cq));
+  tt_int_op(cq.n, ==, 0);
+  tt_ptr_op(NULL, ==, cell_queue_pop(&cq));
+
+  /* Try a packed copy (wide, then narrow, which is a bit of a cheat, since a
+   * real cell queue has only one type.) */
+  memset(&cell, 0, sizeof(cell));
+  cell.circ_id = 0x12345678;
+  cell.command = 10;
+  strlcpy((char*)cell.payload, "Lorax ipsum gruvvulus thneed amet, snergelly "
+          "once-ler lerkim, sed do barbaloot tempor gluppitus ut labore et "
+          "truffula magna aliqua.",
+          sizeof(cell.payload));
+  cell_queue_append_packed_copy(&cq, &cell, 1 /*wide*/, 0 /*stats*/);
+  cell.circ_id = 0x2013;
+  cell_queue_append_packed_copy(&cq, &cell, 0 /*wide*/, 0 /*stats*/);
+  tt_int_op(cq.n, ==, 2);
+
+  pc_tmp = cell_queue_pop(&cq);
+  tt_int_op(cq.n, ==, 1);
+  tt_ptr_op(pc_tmp, !=, NULL);
+  test_mem_op(pc_tmp->body, ==, "\x12\x34\x56\x78\x0a", 5);
+  test_mem_op(pc_tmp->body+5, ==, cell.payload, sizeof(cell.payload));
+  packed_cell_free(pc_tmp);
+
+  pc_tmp = cell_queue_pop(&cq);
+  tt_int_op(cq.n, ==, 0);
+  tt_ptr_op(pc_tmp, !=, NULL);
+  test_mem_op(pc_tmp->body, ==, "\x20\x13\x0a", 3);
+  test_mem_op(pc_tmp->body+3, ==, cell.payload, sizeof(cell.payload));
+  packed_cell_free(pc_tmp);
+  pc_tmp = NULL;
+
+  tt_ptr_op(NULL, ==, cell_queue_pop(&cq));
+
+  /* Now make sure cell_queue_clear works. */
+  cell_queue_append(&cq, pc2);
+  cell_queue_append(&cq, pc1);
+  tt_int_op(cq.n, ==, 2);
+  cell_queue_clear(&cq);
+  pc2 = pc1 = NULL; /* prevent double-free */
+  tt_int_op(cq.n, ==, 0);
+
+ done:
+  packed_cell_free(pc1);
+  packed_cell_free(pc2);
+  packed_cell_free(pc3);
+  packed_cell_free(pc4);
+  packed_cell_free(pc_tmp);
+
+  cell_queue_clear(&cq);
+  free_cell_pool();
+}
+
+struct testcase_t cell_queue_tests[] = {
+  { "basic", test_cq_manip, TT_FORK, NULL, NULL, },
+  END_OF_TESTCASES
+};