add unit test for stack allocator

test/Jamfile

@@ -120,6 +120,7 @@ test-suite libtorrent :
 		test_stat_cache.cpp
 		test_enum_net.cpp
 		test_linked_list.cpp
+		test_stack_allocator.cpp
 		test_file_progress.cpp ]
 
 	[ run test_gzip.cpp ]

test/Makefile.am

@@ -21,6 +21,7 @@ test_programs = \
   test_receive_buffer        \
   test_resume                \
   test_ssl                   \
+  test_stack_allocator       \
   test_storage               \
   test_time_critical         \
   test_torrent               \
@@ -209,6 +210,7 @@ test_receive_buffer_SOURCES = test_receive_buffer.cpp
 test_storage_SOURCES = test_storage.cpp
 test_time_critical_SOURCES = test_time_critical.cpp
 test_resume_SOURCES = test_resume.cpp
+test_stack_allocator_SOURCES = test_stack_allocator.cpp
 test_ssl_SOURCES = test_ssl.cpp
 test_torrent_SOURCES = test_torrent.cpp
 test_tracker_SOURCES = test_tracker.cpp

test/test_stack_allocator.cpp

@@ -0,0 +1,93 @@
+/*
+
+Copyright (c) 2016, Arvid Norberg
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * 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.
+    * Neither the name of the author nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 THE COPYRIGHT OWNER 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.
+
+*/
+
+#include "test.hpp"
+#include "libtorrent/stack_allocator.hpp"
+
+using libtorrent::aux::stack_allocator;
+
+TORRENT_TEST(copy_string)
+{
+	stack_allocator a;
+	int const idx1 = a.copy_string("testing");
+
+	// attempt to trigger a reallocation
+	a.allocate(100000);
+
+	int const idx2 = a.copy_string(std::string("foobar"));
+
+
+	TEST_CHECK(strcmp(a.ptr(idx1), "testing") == 0);
+	TEST_CHECK(strcmp(a.ptr(idx2), "foobar") == 0);
+}
+
+TORRENT_TEST(copy_buffer)
+{
+	stack_allocator a;
+	int const idx1 = a.copy_buffer("testing", 8);
+
+	// attempt to trigger a reallocation
+	a.allocate(100000);
+
+	TEST_CHECK(strcmp(a.ptr(idx1), "testing") == 0);
+}
+
+TORRENT_TEST(allocate)
+{
+	stack_allocator a;
+	int const idx1 = a.allocate(100);
+	char* ptr = a.ptr(idx1);
+	for (int i = 0; i < 100; ++i)
+		ptr[i] = char(i % 256);
+
+	// attempt to trigger a reallocation
+	a.allocate(100000);
+
+	ptr = a.ptr(idx1);
+	for (int i = 0; i < 100; ++i)
+		TEST_CHECK(ptr[i] == char(i % 256));
+}
+
+TORRENT_TEST(swap)
+{
+	stack_allocator a1;
+	stack_allocator a2;
+
+	int const idx1 = a1.copy_string("testing");
+	int const idx2 = a2.copy_string("foobar");
+
+	a1.swap(a2);
+
+	TEST_CHECK(strcmp(a1.ptr(idx2), "foobar") == 0);
+	TEST_CHECK(strcmp(a2.ptr(idx1), "testing") == 0);
+}
+