●●● ●●●● 4. 3 Thread libraries ●●●●● ●●● ●●●0● ●●●0 Three main thread libraries ●●●● POSIX Ptheads The threads extension the posix standard May be provided as either a user-or kernel-level library o win32 Is kernel-level library available on Window systems o Java JVM is running on top of a host operating system The Java thread aPI is typically im plemented using a thread library available on host system On Windows systems, Java threads are typically implemented using the Win 32 API On Linux and uniX often use Pthreads21 4.3 Thread Libraries ⚫ Three main thread libraries ⚫ POSIX Ptheads ▪ The threads extension the POSIX standard ▪ May be provided as either a user- or kernel-level library ⚫ Win32 ▪ Is kernel-level library available on Window systems ⚫ Java ▪ JVM is running on top of a host operating system ▪ The Java thread API is typically implemented using a thread library available on host system ▪ On Windows systems, Java threads are typically implemented using the Win32 API ▪ On Linux and UNIX, often use Pthreads