emulator opengl: add OpenglOsUtils library, a set of OS utils.

This is just a set of OS dependant functionality needed by the
emulator OpenGL host renderer. It currently has implementation for
Linux and Windows only.

osDynLibrary - dlopen/dlsym abstraction
osProcess    - interface to launch a new process, wait and kill it.
osThread     - abstraction interface for creating a thread.

Change-Id: Ib0264592d8c87e865da87acf5c94e2b331801ca4

tools/emulator/opengl/shared/OpenglOsUtils/osProcess.h

@@ -0,0 +1,64 @@
+/*
+* Copyright (C) 2011 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 _OSUTILS_PROCESS_H
+#define _OSUTILS_PROCESS_H
+
+#ifdef _WIN32
+#include <windows.h>
+#elif !defined(__linux__)
+#error "Unsupported platform"
+#endif
+
+namespace osUtils {
+
+class childProcess
+{
+public:
+    static childProcess *create(const char *p_cmdLine, const char *p_startdir);
+    ~childProcess();
+
+    int getPID()
+    {
+#ifdef _WIN32
+        return m_proc.dwProcessId;
+#elif defined(__linux__)
+        return(m_pid);
+#endif
+    }
+
+    int tryWait(bool& isAlive);
+    bool wait(int *exitStatus);
+
+private:
+    childProcess() {};
+
+private:
+#ifdef _WIN32
+    PROCESS_INFORMATION m_proc;
+#elif defined(__linux__)
+    int m_pid;
+#endif
+};
+
+int ProcessGetPID();
+int ProcessGetTID();
+bool ProcessGetName(char *p_outName, int p_outNameLen);
+int KillProcess(int pid, bool wait);
+bool isProcessRunning(int pid);
+
+} // of namespace osUtils
+
+#endif