Operating Systems Design and Implementation, Third Edition phần 9 doc

... signal. (See forkexit.c about 199 92 * pid magic.) 199 93 */ 199 94 count = 0; 199 95 error_code = ESRCH; 199 96 for (rmp = &mproc[0]; rmp < &mproc[NR_PROCS]; rmp++) { 199 97 if (!(rmp->mp_flags ... 199 80 */ 199 81 199 82 register struct mproc *rmp; 199 83 int count; /* count # of signals sent */ 199 84 int error_code; 199 85 199 86 if (signo < 0 || signo > _NSIG) return(...

Ngày tải lên: 12/08/2014, 22:21

... 0-13-14 293 8-8 Print ISBN-13 : 97 8-0-13-14 293 8-3 eText ISBN-10 : 0-13-18 599 1 -9 eText ISBN-13 : 97 8-0-13-18 599 1-3 Pages: 1080 Copyright Preface Chapter 1. Introduction Section 1.1. What Is an Operating System? Section 1.2. ... discussion specifically refers to POSIX (International Standard 99 45-1), hence also to MINI 3, UNIX, and Linux, most other modern operating syste...

Ngày tải lên: 12/08/2014, 22:21

... keyboard.c, and console.c, all of which are large files, When a user logs in on the system console, a shell is created for him with /dev/console as standard input, standard output, and standard error. ... provision must be made for a timeout and an error return if an operation on a floppy disk does not terminate in a reasonable time. [Page 302] 19 19 Simpo PDF Merge and Split Unreg...

Ngày tải lên: 12/08/2014, 22:21

... kernel starts the system and clock tasks, and then the process manager and the file system. The process manager and the file system then cooperate in starting other servers and drivers that are part ... interactive systems, especially timesharing systems and servers, different goals apply. The most important one is to minimize response time, that is the time between issuing a c...

Ngày tải lên: 12/08/2014, 22:21

... (line 90 22), _phys_insb (line 90 47), _phys_outsw (line 90 72), and _phys_outsb (line 90 98), provide access to I/O ports, which on Intel hardware occupy a separate address space from memory and use different ... function that handles the call that corresponds to the message type, possibly generating a reply message, and repeats the cycle as long as MINIX 3 is running (lines 97 68...

Ngày tải lên: 12/08/2014, 22:21

... memory management technique is distributed shared memory (Feeley et al., 199 5; Li and Hudak, 198 9; and Zekauskas et al., 199 4). The idea here is to allow multiple processes over a network to share ... chosen by the operating system. Even if the hardware has been designed with, for example, 512-byte pages, the operating system can easily regard pages 0 and 1, 2 and 3, 4 and 5,...

Ngày tải lên: 12/08/2014, 22:21

... D, and F in that order. Their respective load times were 18, 23, 5, 7, 32, 19, 3, and 8. Their reference bits are 1, 0, 1, 1, 0, 1, 1, and 0 and their modified bits are 1, 1, 1, 0, 0, 0, 1, and ... topics in operating system design. As a whole, that part of the operating system dealing with files is known as the file system and is the subject of this chapter. From the users&...

Ngày tải lên: 12/08/2014, 22:21

... size is determined, for chunk sizes of 6, 2, and 1 bytes, respectively. The actual calculation is done on lines 251 59 to 251 69. 19 19 Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com The ... a pointer to the i-node of the locked file, and the offsets of the first and last bytes of the locked region. 5.6 .9. Pipes and Special Files Pipes and special f...

Ngày tải lên: 12/08/2014, 22:21

... debugging) */ 02 893 }; 02 894 02 895 struct machine { 02 896 int pc_at; 02 897 int ps_mca; 02 898 int processor; 02 899 int protected; 0 290 0 int vdu_ega; 0 290 1 int vdu_vga; 0 290 2 }; 0 290 3 0 290 4 #endif /* ... 0 090 3 * 0 090 4 * open(path, oflag [,mode]) open a file 0 090 5 * fcntl(fd, cmd [,arg]) get or set file attributes 0 090 6 * 0 090 7 */ 0 090 8 0 090 9 #ifndef _FCNTL_H 0 091...

Ngày tải lên: 12/08/2014, 22:21

... the the IEEE, and a member of the Royal Netherlands Academy of Arts and Sciences. He is also winner of the 199 4 ACM Karl V. Karlstrom Outstanding Educator Award, winner of the 199 7 ACM/SIGCSE ... 283 89 select_notified(d, st.DEV_MINOR, st.DEV_SEL_OPS); 28 390 break; 28 391 default: 28 392 printf("FS: unrecognized rep %d to DEV_STATUS\n",st.m_type); 28 393 /* Fall through. */...

Ngày tải lên: 12/08/2014, 22:21