Synchronizing native threads with conditional variables at Android NDK

The previous recipe discusses how to synchronize threads with mutex. This recipe describes how to use conditional variables.

How to do it...

The following steps will help us create an Android project that demonstrates the usage of pthread conditional variables:

1. Create an Android application named NativeThreadsCondVar. Set the package name as cookbook.chapter6.nativethreadscondvar. Refer to the Loading native libraries and registering native methods recipe in Chapter 2, Java Native Interface for more detailed instructions.

2. Right-click on the project NativeThreadsCondVar, select Android Tools | Add Native Support.

3. Add a Java file named MainActivity.java under the package cookbook.chapter6.nativethreadscondvar. This Java file simply loads the native library NativeThreadsCondVar and calls the native jni_start_threads method.

4. Add two files named mylog.h and NativeThreadsCondVar.cpp under the jni folder. NativeThreadsCondVar.cpp...