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Article #20Re: 问一个关于共享区冲突的问题
From: yong
Date: Wed, 21 Dec 2005 15:55
Date: Wed, 21 Dec 2005 15:55
43 lines
3117 bytes
3117 bytes
�Ѿ�ӳ��Ϊ�ڴ�ռ��˾Ϳ��Ա����ͻ,mmap�ڴ����UNIXϵͳ���涼��ϵͳ����, ����������⺯����ɵ�,���Բ����ɳ���ֱ�Ӷ��ļ�,���Ǻ��ļ�����һ��ϵͳ�� ��,����д��ݵ����"�ڴ�"��,��ϵͳ���ܽ���д���ļ�,ϵͳ�Ѿ��Ѷ�д���� �ź���,man��һ��mmap() void * mmap(void *start, size_t length, int prot , int flags, int fd, off_t offset); ���Ը�flags��������һ��ֵMAP_SHARED,����Ϳ����ڶ������й������ռ�, ��д�������msync()�������ڵ����д���ļ���. Buzzard wrote: > mmap���ڴ�ӳ���ļ����Ǻ���˵���ܳ�ͻ�� > > On Tue, 20 Dec 2005 20:44:30 +0800, yong > <yong.personal.mail@gmail.com> wrote: > >> �����ͻ,ֻ���ļ���*����*��ͻ >> >> snnn wrote: >>> ������һƬ�����ڴ�����ͨ��mmap�ķ�ʽ��һ����̵Ķ�������й��? >>> ����p��һ��ָ����ڴ�����һ�������ָ�롣 >>> >>> ��ô >>> >>> (*p) += 2; >>> >>> ����IJ����Ƿ��������ʳ�ͻ�����ᣬ��ô����Ϊʲô��ϵͳ������ >>> ���׳�� >>> >>> (�ó���������һ��SMPϵͳ��) >>> >>> �����ǵij�����ͨ������ķ�ʽ������ݵ�ʱ����ôʲôʱ����Ҫ���� >>> ����ڽ�̼������ֻ�����̼߳����. >>> >>> -- My blog: http://cyberblue-one.blogspot.com My flickr: http://www.flickr.com/photos/cyberblue My Personal Wiki: http://211.92.88.40/~cyberblue/cgi-bin/wiki.pl?action=index
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X-Google-Thread: 11047e,3be68aeed99f8432 X-Google-Attributes: gid11047e,public X-Google-Language: Chinese,GB Path: arc1-ca.pugleaf.net!g2news1.google.com!news4.google.com!newsfeed2.dallas1.level3.net!news.level3.com!bloom-beacon.mit.edu!news.cn99.com!news.yaako.com!not-for-mail From: yong <yong.personal.mail@gmail.com> Newsgroups: cn.comp.os,cn.comp.lang.c Subject: Re: 问一个关于共享区冲突的问题 Date: Wed, 21 Dec 2005 23:55:11 +0800 Organization: Bentium Ltd. (CN99) Lines: 43 Message-ID: <dobtr0$gsg$1@news.yaako.com> References: <86zmnhk2e5.fsf@bbs.cumt.edu.cn> <do8uas$jh0$1@news.yaako.com> <6lniq157h273cfu8lr0gm6fnlohns7oqqo@4ax.com> NNTP-Posting-Host: 60.26.129.26 Mime-Version: 1.0 Content-Type: text/plain; charset=GB2312 Content-Transfer-Encoding: 8bit X-Trace: news.yaako.com 1135180448 17296 60.26.129.26 (21 Dec 2005 15:54:08 GMT) X-Complaints-To: usenet@news.yaako.com NNTP-Posting-Date: Wed, 21 Dec 2005 15:54:08 +0000 (UTC) User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8b4) Gecko/20050910 SeaMonkey/1.0a In-Reply-To: <6lniq157h273cfu8lr0gm6fnlohns7oqqo@4ax.com>