Implemented x-platform getpid, started a process.h module for stuff l… (

#546)

* Implemented x-platform getpid, started a process.h module for stuff like fork and process invoke etc...

include/aws/common/process.h

@@ -0,0 +1,26 @@
+#ifndef AWS_COMMON_PROCESS_H
+#define AWS_COMMON_PROCESS_H
+/*
+ * Copyright 2010-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *  http://aws.amazon.com/apache2.0
+ *
+ * or in the "license" file accompanying this file. This file 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 <aws/common/common.h>
+
+AWS_EXTERN_C_BEGIN
+
+AWS_COMMON_API int aws_get_pid(void);
+
+AWS_EXTERN_C_END
+
+#endif /* AWS_COMMON_PROCESS_H */

source/posix/process.c

@@ -0,0 +1,23 @@
+/*
+ * Copyright 2010-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *  http://aws.amazon.com/apache2.0
+ *
+ * or in the "license" file accompanying this file. This file 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 <aws/common/process.h>
+
+#include <sys/types.h>
+#include <unistd.h>
+
+int aws_get_pid(void) {
+    return (int)getpid();
+}

source/windows/process.c

@@ -0,0 +1,21 @@
+/*
+ * Copyright 2010-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *  http://aws.amazon.com/apache2.0
+ *
+ * or in the "license" file accompanying this file. This file 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 <aws/common/process.h>
+
+#include <process.h>
+
+int aws_get_pid(void) {
+    return _getpid();
+}

tests/CMakeLists.txt

@@ -385,6 +385,8 @@ add_test_case(test_background_log_channel_all)
 add_test_case(test_pipeline_logger_unformatted_test)
 add_test_case(test_pipeline_logger_formatted_test)
 
+add_test_case(get_pid_sanity_check_test)
+
 generate_test_driver(${CMAKE_PROJECT_NAME}-tests)
 
 if (NOT MSVC AND NOT LEGACY_COMPILER_SUPPORT)

tests/process_test.c

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2010-2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *  http://aws.amazon.com/apache2.0
+ *
+ * or in the "license" file accompanying this file. This file 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 <aws/testing/aws_test_harness.h>
+
+#include <aws/common/process.h>
+
+static int s_get_pid_sanity_check_test_fn(struct aws_allocator *allocator, void *ctx) {
+    (void)allocator;
+    (void)ctx;
+
+    int pid = aws_get_pid();
+    ASSERT_TRUE(pid > 0);
+
+    return AWS_OP_SUCCESS;
+}
+
+AWS_TEST_CASE(get_pid_sanity_check_test, s_get_pid_sanity_check_test_fn)