Exporting C++ headers from system/core

Moved headers from include/libutils and include/libsysutils to
libutils/include and libsysutils/include respectively, so they can be
exported via these libs. They needed to be moved since Soong does
not allow export from external folder.

Added symlink from old locations. They are needed since Soong
includes system/core/include by default. Once all modules are
cleaned up to explicitly add the required libs, the symlinks will be
removed.

Moved headers of libutils to libutils_headers. They should be used
by modules for header-only inlines. Added libutils_headers as
dependency of libutils.

Split of C++ headers into those that have no dependency and those that
have dependency on libutils.so will be handled in a later CL.

Test: Add above libs to shared lib of local module
Change-Id: I122db72056b26b1f39bad1d9a0c2a1c5efda3550

1 files changed, 125 insertions, 0 deletions

diff --git a/libutils/include/utils/AndroidThreads.h b/libutils/include/utils/AndroidThreads.h
new file mode 100644
index 000000000..4c2dd49f6
--- /dev/null
+++ b/libutils/include/utils/AndroidThreads.h
@@ -0,0 +1,125 @@
+/*
+ * Copyright (C) 2007 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.
+ */
+
+#ifndef _LIBS_UTILS_ANDROID_THREADS_H
+#define _LIBS_UTILS_ANDROID_THREADS_H
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#if !defined(_WIN32)
+# include <pthread.h>
+#endif
+
+#include <utils/ThreadDefs.h>
+
+// ---------------------------------------------------------------------------
+// C API
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Create and run a new thread.
+extern int androidCreateThread(android_thread_func_t, void *);
+
+// Create thread with lots of parameters
+extern int androidCreateThreadEtc(android_thread_func_t entryFunction,
+                                  void *userData,
+                                  const char* threadName,
+                                  int32_t threadPriority,
+                                  size_t threadStackSize,
+                                  android_thread_id_t *threadId);
+
+// Get some sort of unique identifier for the current thread.
+extern android_thread_id_t androidGetThreadId();
+
+// Low-level thread creation -- never creates threads that can
+// interact with the Java VM.
+extern int androidCreateRawThreadEtc(android_thread_func_t entryFunction,
+                                     void *userData,
+                                     const char* threadName,
+                                     int32_t threadPriority,
+                                     size_t threadStackSize,
+                                     android_thread_id_t *threadId);
+
+// set the same of the running thread
+extern void androidSetThreadName(const char* name);
+
+// Used by the Java Runtime to control how threads are created, so that
+// they can be proper and lovely Java threads.
+typedef int (*android_create_thread_fn)(android_thread_func_t entryFunction,
+                                        void *userData,
+                                        const char* threadName,
+                                        int32_t threadPriority,
+                                        size_t threadStackSize,
+                                        android_thread_id_t *threadId);
+
+extern void androidSetCreateThreadFunc(android_create_thread_fn func);
+
+// ------------------------------------------------------------------
+// Extra functions working with raw pids.
+
+#if defined(__ANDROID__)
+// Change the priority AND scheduling group of a particular thread.  The priority
+// should be one of the ANDROID_PRIORITY constants.  Returns INVALID_OPERATION
+// if the priority set failed, else another value if just the group set failed;
+// in either case errno is set.  Thread ID zero means current thread.
+extern int androidSetThreadPriority(pid_t tid, int prio);
+
+// Get the current priority of a particular thread. Returns one of the
+// ANDROID_PRIORITY constants or a negative result in case of error.
+extern int androidGetThreadPriority(pid_t tid);
+#endif
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+// ----------------------------------------------------------------------------
+// C++ API
+#ifdef __cplusplus
+namespace android {
+// ----------------------------------------------------------------------------
+
+// Create and run a new thread.
+inline bool createThread(thread_func_t f, void *a) {
+    return androidCreateThread(f, a) ? true : false;
+}
+
+// Create thread with lots of parameters
+inline bool createThreadEtc(thread_func_t entryFunction,
+                            void *userData,
+                            const char* threadName = "android:unnamed_thread",
+                            int32_t threadPriority = PRIORITY_DEFAULT,
+                            size_t threadStackSize = 0,
+                            thread_id_t *threadId = 0)
+{
+    return androidCreateThreadEtc(entryFunction, userData, threadName,
+        threadPriority, threadStackSize, threadId) ? true : false;
+}
+
+// Get some sort of unique identifier for the current thread.
+inline thread_id_t getThreadId() {
+    return androidGetThreadId();
+}
+
+// ----------------------------------------------------------------------------
+}; // namespace android
+#endif  // __cplusplus
+// ----------------------------------------------------------------------------
+
+#endif // _LIBS_UTILS_ANDROID_THREADS_H