following table:
Macro definition
Function description
Spin_lock_init (Lock)
Initialize the spin lock and set the spin lock to 1, indicating that a resource is available.
Spin_is_locked (Lock)
If the spin lock is set to 1 (unlocked), 0 is returned, otherwise 1 is returned.
Spin_unlock_wait (Lock)
Wait until the spin lock is unlocked
fact, many practical software systems must maintain one or two very critical objects, they usually have very complex state transition relationships, and need to respond to various asynchronous events from outside. For example, in VoIP telephony systems, instances of a telephony class (telephone) must be able to respond to random calls from each other, keystroke events from the user, and signaling from the network. When processing these messages, the behavior of the class telephone depends entir
Function stack tracing and broadcom6838 functions are implemented in the broadcom6838 development environment.
In the development of embedded devices, the kernel provides good support for function stack tracing of kernel modules, but function stack tracing at the user layer does not provide good support. Collecting and learning function stack traces on the Internet mostly describe the implementation mechanism of the INTER architecture supporting stack frames, or directly provide glibc ready-made
words like this.* A: string literal "abc" can also be seen as a string object.* String s = "MyWorld";* B: The string is a constant, and once assigned, it cannot be changed. But it can be made into rubbish.How to construct a 4.String class* A: Common construction methods* 1.public String (): null argument constructed to represent a sequence of empty characters* 2.public string (byte[] bytes): Convert byte array to string, (also known as decoding)* 3.public string (byte[] bytes,int index,int leng
";String STR4 = new String ("abc");System.out.println (Str3 = = STR4); Flase STR3 value in stack memory, STR4 value in heap memoryString Hello = "Hello";String hel = "hel";String lo = "Lo";System.out.println (Hello = = "hel" + "lo"); True// two constants added, first detect if there is a hello in the stack memory if yes, point to the existing stack in the Hello spaceSystem.out.println (Hello = = "hel" + lo); FlaseSystem.out.println (Hello = = hel + lo); Flase//lo is in the constant pool, does no
It AndroidAttention draw the Red line partCompiled under new version 5.1.1 of Eclipse1) Write a class inheritance Fragement650) this.width=650; "src=" Http://s6.sinaimg.cn/mw690/002wgu3Hgy6SSuX1xyd35 "title=" "style=" border:0px; Vertical-align:middle; "/>2) Pay attention to the XML in menu650) this.width=650; "src=" Http://s8.sinaimg.cn/mw690/002wgu3Hgy6SSvf7mab27 "title=" "style=" border:0px; vertical-align:middle; "/> copy android, then change the
stringsNSString *S6 = [[NSString ALLOC]INITWITHSTRING:S5];
Convenience Builder:
NSString *S7 = [NSString STRINGWITHSTRING:S6];NSLog (@ "%@", S7);
5, write a TXT document, and then drag into the project, and then drag the project document into the initwithcontentsoffile:@ "" "" parameter, will automatically identify the TXT address.
Assigning a value to a string using a fileNSString *S8 = [[NSStrin
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/y More file names display output files on screen. I love the Computer Technology Forum 7 u7 s! G # E (uDoskey command to be locked = character 1 t) BW * B8 K # L + Y to build the best computer self-learning Forum Doskey UNLOCK command = Lock Command provided for DOS (edit command line, re-call Win2k command, and create macro ). For example, run the following command to lock the Dir: doskey dir = entsky (doskey dir = dir cannot be used); unlock: doskey dir = %? : O-|M B7 d Taskmgr call up the T
last two pages, so as long as the slightest click can, do not need to contribute. "K3 to M x/h/[0 P" P0 Q3. Use the red dot to open a new webpage! R5 C $ l; v+ IIE7 support paging, in order to open the page in a new page, there are two ways: *}$ D9 P; U ' x/g% ~ z:m ' L5 B1.Ctrl + Left R5 v! Y0 t/r o:m7 T5 l# q I2.Ctrl + tap the red dot (must be set first as the Secret 1 mode)% j* ~ M s# O. e$ V3 |$ K) X3 p$ HTo open in a new browser, there are also two ways to: i! M! V;? $ F7 n! i8}) u$}1.Shif
; receive (void * priv, struct wpa_signal_info * si)-> evaluate (priv, rssi_cmd, Buf, sizeof (BUF) or // driver_cmd_wext.c evaluate (priv, linkspeed_cmd, Buf, sizeof (BUF )) -> struct iwreq IWR; IWR. u. data. pointer = Buf; IWR. u. data. length = buf_len; IOCTL (DRV-> ioctl_sock, siocsiwpriv, IWR); function in the kernel: Listen 80211_wext_setpriv (wext-compat.c) rssi_cmd: 201780211_wireless_stats (obtain the signal strength and other information of the currently connected AP) for the above lin
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