Prevent name conflict for eventfd.cpp and eventfd.s when building libc.a
- eventfd.cpp and eventfd.s will output to the same file when building libc.a
out/target/product/*/obj/STATIC_LIBRARIES/libc_intermediates/WHOLE/libc_common_objs/eventfd.o
- And then `eventfd` will undefined when statically linked to libc.
Also add a unit test.
Change-Id: Ib310ade3256712ca617a90539e8eb07459c98505
diff --git a/tests/eventfd_test.cpp b/tests/eventfd_test.cpp
new file mode 100644
index 0000000..2c2c5f0
--- /dev/null
+++ b/tests/eventfd_test.cpp
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <gtest/gtest.h>
+
+#if !defined(__GLIBC__) // Android's prebuilt gcc's header files don't include <sys/eventfd.h>.
+
+#include <sys/eventfd.h>
+
+TEST(eventfd, smoke) {
+ unsigned int initial_value = 2;
+ int fd = eventfd(initial_value, O_NONBLOCK);
+ ASSERT_NE(fd, -1);
+
+ eventfd_t value = 123;
+ ASSERT_EQ(0, eventfd_read(fd, &value));
+ ASSERT_EQ(initial_value, value);
+
+ // Reading clears the counter.
+ ASSERT_EQ(-1, eventfd_read(fd, &value));
+ ASSERT_EQ(EAGAIN, errno);
+
+ // Values written are added until the next read.
+ ASSERT_EQ(0, eventfd_write(fd, 1));
+ ASSERT_EQ(0, eventfd_write(fd, 1));
+ ASSERT_EQ(0, eventfd_write(fd, 1));
+
+ ASSERT_EQ(0, eventfd_read(fd, &value));
+ ASSERT_EQ(3U, value);
+
+ close(fd);
+}
+
+#endif