By W. Richard Stevens, Stephen A. Rago
PLEASE notice: most likely end result of the huge dimension or excessive pagecount e-ink readers seem to have hassle rendering the pages of this booklet. it is going to open adequately on computer-based readers or phones/tablets (Android, iPad, etc). this is often most likely only a reminiscence factor as a result of regularly weaker on ereaders - the dossier supplied here's no longer malformed or corrupt.
For greater than 20 years, critical C programmers have depended on one e-book for functional, in-depth wisdom of the programming interfaces that force the UNIX and Linux kernels: W. Richard Stevens’ complex Programming within the UNIX® surroundings . Now, once more, Rich’s colleague Steve Rago has completely up to date this vintage paintings. the hot 3rd version helps today’s top structures, displays new technical advances and top practices, and aligns with model four of the only UNIX Specification.Steve rigorously keeps the spirit and technique that experience made this ebook so priceless. construction on Rich’s pioneering paintings, he starts off with documents, directories, and methods, conscientiously laying the foundation for extra complex innovations, akin to sign dealing with and terminal I/O. He additionally completely covers threads and multithreaded programming, and socket-based IPC.
This version covers greater than seventy new interfaces, together with POSIX asynchronous I/O, spin locks, boundaries, and POSIX semaphores. such a lot out of date interfaces were got rid of, with the exception of a couple of which are ubiquitous. approximately all examples were validated on 4 smooth structures: Solaris 10, Mac OS X model 10.6.8 (Darwin 10.8.0), FreeBSD 8.0, and Ubuntu model 12.04 (based on Linux 3.2).
As in past variants, you’ll study via examples, together with greater than 10000 traces of downloadable, ISO C resource code. greater than 400 procedure calls and features are tested with concise, whole courses that basically illustrate their utilization, arguments, and go back values. To tie jointly what you’ve realized, the e-book provides numerous chapter-length case reports, each one reflecting modern environments.
Advanced Programming within the UNIX® surroundings has helped generations of programmers write code with unparalleled strength, functionality, and reliability. Now up to date for today’s platforms, this 3rd version can be much more beneficial.
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Additional resources for Advanced Programming in the UNIX Environment (3rd Edition)
1 Regular Paging Starting with the i80386, the paging unit of Intel processors handles 4 KB pages. The 32 bits of a linear address are divided into three fields: Directory The most significant 10 bits Table The intermediate 10 bits Offset The least significant 12 bits The translation of linear addresses is accomplished in two steps, each based on a type of translation table. The first translation table is called Page Directory and the second is called Page Table. The physical address of the Page Directory in use is stored in the cr3 processor register.
Today's CPUs include hardware circuits that automatically translate the virtual addresses into physical ones. To that end, the available RAM is partitioned into page frames 4 or 8 KB in length, and a set of page tables is introduced to specify the correspondence between virtual and physical addresses. These circuits make memory allocation simpler, since a request for a block of contiguous virtual addresses can be satisfied by allocating a group of page frames having noncontiguous physical addresses.
The following section will concentrate on how to synchronize kernel control paths. 1 Nonpreemptive kernels In search of a drastically simple solution to synchronization problems, most traditional Unix kernels are nonpreemptive: when a process executes in Kernel Mode, it cannot be arbitrarily suspended and substituted with another process. Therefore, on a uniprocessor system all kernel data structures that are not updated by interrupts or exception handlers are safe for the kernel to access. Of course, a process in Kernel Mode can voluntarily relinquish the CPU, but in this case it must ensure that all data structures are left in a consistent state.