我正在使用
android NDK独立工具链编译Qt / C项目.我用make-standalone-toolchain.sh创建了独立工具链–arch = arm –toolchain = arm-linux-androideabi-4.9 –platform = android-21命令. NDK版本是android-ndk-r10e.目标项目使用pthread库中的一些函数.在编译时,我收到以下错误：
error: 'pthread_getaffinity_np' was not declared in this scope const int err = pthread_getaffinity_np(_pthreadId,sizeof(cpu_set_t),&cpuSetMask); compilation terminated due to -Wfatal-errors.
我已经检查了ndk工具链中包含的pthread的标题,我没有找到pthread_getaffinity_np函数的声明.
Android的pthread功能是否有限？如何正确使用pthread与Android NDK？
解决方法
Android的pthread功能是否有限？
AFAIK,是的.
http://mobilepearls.com/labs/native-android-api/#pthreads
POSIX threads (pthreads) The android libc,bionic,provides built-in support for pthreads,so no additional linking (-lpthreads) is necessary. It does not implement full POSIX threads functionality and leaves out support for read/write locks,pthread_cancel(),process-shared mutexes and condition variables as well as other more advanced features. Read the bionic OVERVIEW.txt for more information. TLS,thread-local storage,is limited to 59 pthread_key_t slots available to applications,lower than the posix minimum of 128.