dispatch

Interpretation vs dynamic dispatch penalty in Python

由 試著忘記壹切 提交于 2019-11-26 23:12:34
问题 I watched Brandon Rhodes' talk about Cython - "The Day of the EXE Is Upon Us". Brandon mentions at 09:30 that for a specific short piece of code, skipping interpretation gave 40% speedup, while skipping the allocation and dispatch gave 574% speedup (10:10). My question is - how is this measured for a specific piece of code? Does one need to manually extract the underlying c commands and then somehow make the runtime run them? This is a very interesting observation, but how do I recreate the

DispatchSourceTimer and Swift 3.0

由 自作多情 提交于 2019-11-26 19:37:37
问题 I can't figure out how to make dispatch timer work repeatedly in Swift 3.0. My code: let queue = DispatchQueue(label: "com.firm.app.timer", attributes: DispatchQueue.Attributes.concurrent) let timer = DispatchSource.makeTimerSource(flags: DispatchSource.TimerFlags(rawValue: UInt(0)), queue: queue) timer.scheduleRepeating(deadline: DispatchTime.now(), interval: .seconds(5), leeway: .seconds(1) ) timer.setEventHandler(handler: { //a bunch of code here }) timer.resume() Timer just fires one time

How can I implement a dynamic dispatch table in C

由 会有一股神秘感。 提交于 2019-11-26 17:49:28
问题 First of all, I understand how to implement a dispatch table using function pointers and a string or other lookup, that's not the challenge. What I'm looking for is some way to dynamically add entries to this table at compile time . The type of code structure I'd hope for is something like: Strategy.h - contains function definition for the dispatcher and dispatch table definition Strategy.c - contains code for dispatcher MyFirstStrategy.c - includes Strategy.h and provides one implementation

Android - Key Dispatching Timed Out

由 寵の児 提交于 2019-11-26 16:32:20
In my Android application I am getting a very strange crash, when I press a button (Image) on my UI the entire application freezes and after a couple of seconds I getthe dreaded force close dialog appearing. Here is what gets printed in the log: WARN/WindowManager(88): Key dispatching timed out sending to package name/Activity WARN/WindowManager(88): Dispatch state: {{KeyEvent{action=1 code=5 repeat=0 meta=0 scancode=231 mFlags=8} to Window{432bafa0 com.android.launcher/com.android.launcher.Launcher paused=false} @ 1281611789339 lw=Window{432bafa0 com.android.launcher/com.android.launcher

Is there a way to store a function in a list or dictionary so that when the index (or key) is called it fires off the stored function?

由 泄露秘密 提交于 2019-11-26 14:20:51
For instance, I've tried things like mydict = {'funcList1': [foo(),bar(),goo()], 'funcList2': [foo(),goo(),bar()] , which doesn't work. Is there some kind of structure with this kind of functionality? I realize that I could obviously do this just as easily with a bunch of def statements: def func1(): foo() bar() goo() But the number of statements I need is getting pretty unwieldy and tough to remember. It would be nice to wrap them nicely in a dictionary that I could examine the keys of now and again. Functions are first class objects in Python and so you can dispatch using a dictionary. For

Wrong specialized generic function gets called in Swift 3 from an indirect call

由 眉间皱痕 提交于 2019-11-26 11:38:28
问题 I have code that follows the general design of: protocol DispatchType {} class DispatchType1: DispatchType {} class DispatchType2: DispatchType {} func doBar<D:DispatchType>(value:D) { print(\"general function called\") } func doBar(value:DispatchType1) { print(\"DispatchType1 called\") } func doBar(value:DispatchType2) { print(\"DispatchType2 called\") } where in reality DispatchType is actually a backend storage. The doBar functions are optimized methods that depend on the correct storage

Android - Key Dispatching Timed Out

由 雨燕双飞 提交于 2019-11-26 06:07:05
问题 In my Android application I am getting a very strange crash, when I press a button (Image) on my UI the entire application freezes and after a couple of seconds I getthe dreaded force close dialog appearing. Here is what gets printed in the log: WARN/WindowManager(88): Key dispatching timed out sending to package name/Activity WARN/WindowManager(88): Dispatch state: {{KeyEvent{action=1 code=5 repeat=0 meta=0 scancode=231 mFlags=8} to Window{432bafa0 com.android.launcher/com.android.launcher

Is there a way to store a function in a list or dictionary so that when the index (or key) is called it fires off the stored function?

由 ◇◆丶佛笑我妖孽 提交于 2019-11-26 05:55:45
问题 For instance, I\'ve tried things like mydict = {\'funcList1\': [foo(),bar(),goo()], \'funcList2\': [foo(),goo(),bar()] , which doesn\'t work. Is there some kind of structure with this kind of functionality? I realize that I could obviously do this just as easily with a bunch of def statements: def func1(): foo() bar() goo() But the number of statements I need is getting pretty unwieldy and tough to remember. It would be nice to wrap them nicely in a dictionary that I could examine the keys of

Using a dispatch_once singleton model in Swift

由 橙三吉。 提交于 2019-11-26 03:12:35
问题 I\'m trying to work out an appropriate singleton model for usage in Swift. So far, I\'ve been able to get a non-thread safe model working as: class var sharedInstance:TPScopeManager { get { struct Static { static var instance : TPScopeManager? = nil } if !Static.instance { Static.instance = TPScopeManager() } return Static.instance! } } Wrapping the singleton instance in the Static struct should allow a single instance that doesn\'t collide with singleton instances without complex naming
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