wgn flags

Tags: flags div led inline Description Ted always store compilationIn the Linux kernel (linux-4.14.12/mm/slab.c#3389), at first glance at the bottom of the code, it seems that L3389 have a bug, so I read around the interest of a bit local_irq_save/local_irq_ The source code of the restore./*linux-4.14.12/mm/slab.c#3389*/3377 Static__always_inlinevoid*3378Slab_alloc (structKmem_cache *cachep, gfp_t flags, u

match. */ void (*init)(struct ipt_entry_match *m, unsigned int *nfcache); /* Function which parses command options; returns true if it ate an option */ int (*parse)(int c, char **argv, int invert, unsigned int *flags, const struct ipt_entry *entry, unsigned int *nfcache, struct ipt_entry_match **match); /* Final check; exit if not ok. */ void (*final_check)(unsigned int

. The net/IPv4/Netfilter/ipt_iprange.c module is provided in the kernel to match the address segment. We can modify the module and add the address "hole. First, you must define the data structure to be matched to describe the matching conditions. modify it to/* include/Linux/netfilter_ipv4/ipt_iprangehole.h */# ifndef _ ipt_iprangehole_h Based on the ipt_iprange.h header file # DEFINE _ ipt_iprangehole_h # define iprange_src 0x01/* match source IP address */ # Define iprange_dst 0x02/* match des

The status of processes in the Linux kernel is mainly in several states:1. Running state: that the process is running on the CPU, it is occupying the CPU at the moment;2. Ready state: The process, in addition to the CPU, has been able to run all the conditions, in the ready queue waiting for the scheduler (schedule) scheduling;3. Blocking state: The process in addition to the lack of CPU, but also lack of other conditions, waiting in the queue to wait for the required conditions;Describes the or

Note: The article is reproduced in the network.C-priority list Precedence Operator Description Example Associativity 1 () [] -> . :: + + - - Grouping operator Array access Member access from a pointer Member access from an object scoping operator Post-increment post-decrement (A + b)/4; ARRAY[4] = 2; Ptr->age = 34; Obj.age = 34; Class::age = 2; for (i = 0; i for (i = ten; i > 0; i--) ... Left-to-righ

-supporting functions#define KSHOULDPRINTREACHABILITYFLAGS 1static void Printreachabilityflags (Scnetworkreachabilityflags flags, const char* comment){#if kshouldprintreachabilityflagsNSLog (@ "reachability Flag Status:%c%c%c%c%c%c%c%c%c%s\n",(Flags Kscnetworkreachabilityflagsiswwan)? ' W ': '-',(Flags kscnetworkreachabilityflagsreachable)? ' R ': '-',(

, closing connections, and so on, because the flag bit separates the stages of the connection, So that the process of different stages can be modeled, that is, events .So to figure out the triggering process of the previous blog post event, it is essential to understand how fossa and mongoose use the flag bit to represent each phase of the connection. Fossa official documentation indicates that each connection has a flag bit field. Fossa defines a variety of

For the call of the mount system involved in the installation of the preceding root directory file system, we consider that a file system will be installed on an installed file system, that is, call the mount system call implementation. The mount system call is used to install a common file system. its... for the call of the mount system involved in the installation of the preceding root directory file system, we consider that a file system will be installed on an installed file system, that is,

certain period of time, thread B wants to wake up the thread in the queue Q. It only needs to obtain the TCB pointer of thread a and set the thread a status to ready. Wait for thread a to resume running, and then exit node n to wait for queue Q to complete the entire process from blocking to recovery. The principle is boring. Let's look at the code below. We avoid complicated task status transition and scheduling. Even the analysis of the waiting queue is in the order from basic to extended. Th

For the call of the mount System Involved in the installation of the preceding root directory file system, we consider that a file system will be installed on an installed file system, that is, call the mount System Call implementation. The mount System Call is used to install a common file system. Its service routine is sys_mount ()./* Sys_mount system call *//* Dev_name is the path name of the device to be installed;Dir_name is the installed path name;Type is a string that represents the file

() Textstorecommand.encode () textstorecommand.encodevalue () Serializingtranscoder.encode ( ) Baseserializingtranscoder.serialize ()First call the Xmemcacheclient.set (final string key, Final int exp, final Object value) method, the key parameter corresponds to the string "key", and the exp parameter corresponds to the integer 0 (the expression cache never expires). The value parameter corresponds to the string "Hello world!". After a series of method calls, the final cal

is 0, and the result is opposite to B; 3. Usage: mask Bitwise operators are commonly used in masks. Masks refer to bitwise combinations set to on (1) or off (0. Why is it called a mask? What happens after we combine a volume with a mask: For example, assume that the definition of the symbolic constant MAS is 2 (that is, the binary form is 00000010), only 1 is 1, and other bits are 0 Flag = 10010110b Flags = flags