创建两个生产者进程和两个消费者进程，生产者进程a需要生成10000个整数,每次都将自己的进程号（用getpid()函数获得）和生成的整数放入共享内存中（共享内存大小为64Byte）。生产者b每次从26个英文字母中选一个，并将自己的进程号和选中的字母放入共享内存中，直到26个字母全部都选中。消费者进程c负责从共享内存中读取数据生产者进程a的数据并且将这些数据写入文件a.out。消费者进程d从共享内存读取进程b的数据后写入b.out中。-The process of the creation of

在linux上執行指令 ls ctrl+h 等 按 ctrl + c 顯示執行過的指令 按 ctrl + d 結束程式 ctrl + z 顯示曾經執行過的指令 執行history 顯示出執行過的指令 -Run in the linux command ls ctrl+ h and so on in accordance with ctrl+ c show performed by the command ctrl+ d the end of the program ctrl+

Mesa 3-D graphics library.Used in out-of-memory situations.

Needed for pthread_rwlock_. If it causes problems, you could take it out, but then you d have to unset HAVE_RWLOCK (at least on linux it does cause problems for FreeBSD, or MacOSX, but isn t needed. -Needed for pthread_rwlock_. If it causes problem