Two Methods Two methods to support threads o User threads VS.Kernel threads User threads Thread management done by user-level threads library without kernel support Kernel may be multithreaded or not. Three primary thread libraries: POSIX Pthreads Win32 threads Java threads 口18，走卡11月00 东香兰xanchen@ustc.edu.cn http:/staff..u011740i:Operating System操作系统原理斐 March29,201910/44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Two Methods Two methods to support threads User threads VS. Kernel threads 1 User threads ▶ Thread management done by user-level threads library without kernel support ⋆ Kernel may be multithreaded or not. ▶ Three primary thread libraries: 1 POSIX Pthreads 2 Win32 threads 3 Java threads 陈香兰 xlanchen@ustc.edu.cn http://staff.ustc.edu.cn/~xlanchen (Computer Application Laboratory, CS, USTC @ Hefei Embedded System Laboratory, CS, USTC @ Suzhou) 0117401: Operating System 操作系统原理与设计 March 29, 2019 10 / 44