inline

Difference between __always_inline and inline

社会主义新天地 提交于 2019-12-05 08:31:14
There is a nice explanation of using inline instruction on another question Could anyone explain me if there is any difference using inline and __always_inline on a header file? And, when I would prefer __always_inline over inline or vice-versa? Always inline function attribute indicates that a function must be inlined. The compiler attempts to inline the function, regardless of the characteristics of the function. However with inline attributes the compiler does not inline a function if doing so causes problems. For example, a recursive function is inlined into itself only once. __forceinline

Make method actually inline

别等时光非礼了梦想. 提交于 2019-12-05 06:49:03
I forge a simple example to check the @inline annotation behavior: import scala.annotation.tailrec object InlineTest extends App { @inline private def corec(x : Int) : Int = rec(x - 1) @tailrec private def rec(x : Int) : Int = if (x < 3) x else { if (x % 3 == 0) corec(x-1) else rec(x-4) } @tailrec private def rec1(x : Int) : Int = if (x < 3) x else { if (x % 3 == 0) { val arg = x - 1 rec1(arg - 1) } else rec1(x-4) } Console.println( rec(args(0).toInt) ) } This example compiled without warnings, both tailrec annotations were in effect as I thought. But when I actually execute the code, it gives

How do I use scipy.weave.inline together with external C libraries?

假装没事ソ 提交于 2019-12-05 05:43:32
I am trying to understand weave.inline to wrap C code in my Python programs. The code below simply takes the Numpy array and multiplicates all of its elements by 2. inl.py import numpy import scipy.weave a = numpy.array([1.0, 2.0, 3.0]) N = a.shape[0] print a code = \ """ int i; for(i = 0; i < N; i++) { a[i] = a[i] * 2; } """ scipy.weave.inline(code, ['a','N']) print a Then I want to carry some functions from inline code to external libraries. Let it be the trivial multiplication by 2. So I create two files: mult.c #include "mult.h" float mult(float n) { return n * 2; } mult.h float inc(float

Difference between using fully qualified name and import in Java

ぃ、小莉子 提交于 2019-12-05 05:37:28
Are there any differences using an "inline import" (a fully qualified name) and normal import in terms of performance, memory, compile-time, etc. in Java? chooser.setCurrentDirectory(new java.io.File(".")); and import java.io.File; ... chooser.setCurrentDirectory(new File(".")); The main thing you should focus in is readability. I find the second one more readable. In rare cases, I prefer the second approach. Let's consider the following scenario: For some reason, I wrote a class and named it File . I typed File file = new File(...) and my IDE auto-imported the java.io.File for me. But I don't

Create custom FrameworkContentElement to add diagonal line over text in WPF

梦想的初衷 提交于 2019-12-05 04:43:31
Is there any way to create a custom FrameworkContentElement (or an Inline ) that draws a diagonal line over its content? Something like Strike-through decoration but with a diagonal shape: It is not possible to inherent from TextDecoration or TextEffect (they are sealed). Any idea? UPDATE : I tried to create an example as minimal as possible. In more complex scenarios you will have to extend this. Here is how it looks: this is the corresponding xaml: <AdornerDecorator> <StackPanel> <TextBlock> <Run>this is normal Text</Run><LineBreak/> <Run local:DiagonalStrikeThroughAdorner.StrikeThroughBrush

inline function in namespace generate duplicate symbols during link on gcc

这一生的挚爱 提交于 2019-12-05 03:38:29
I have a namespace with inline function that will be used if several source files. When trying to link my application, the inline function are reported as duplicate symbols. It seems as if my code would simply not inline the functions and I was wondering if this is the expected behavior and how to best deal with it. I use the following gcc options: -g -Wextra -pedantic -Wmissing-field-initializers -Wredundant-decls -Wfloat-equal -Wno-reorder -Wno-long-long The same code style seems to compile and link properly when build in a VC7 environment. The following code example shows the structure of

When does Delphi honor `inline` and when not?

做~自己de王妃 提交于 2019-12-05 00:59:26
问题 I was tying to optimize a piece of code that has this construct: while (i > 0) do begin Dec(i); This looks inefficient, so I tried to do this: while (Dec(i) >= 0) do begin That doesn't work because Dec is a procedure and not a function. So I rewrite it to: procedure Withloop; var .... function Decr(var a: integer): integer; inline; begin Dec(a); Result:= a; end; ... while (Decr(i) >= 0) do begin But this gets compiled into: SDIMAIN.pas.448: while (Decr(i) >= 0) do begin 00468EE5 8BC4 mov eax

Twitter-Bootstrap - put simple elements inline

元气小坏坏 提交于 2019-12-04 23:51:13
Is there anyway to put 2 <a> elements displaying inline? i tryed : <div class="form-inline"> <a>jjj</a> <a>sss</a> </div> and also <div class="row-fluid"> <a class="inline">jjj</a> <a class="inline">sss</a> </div> but it doesn't work. Anchor tags by default should be displayed inline . You must have some extra styling setting them to display as block elements or something similar. Using your code, here is a working JSFiddle . Inspect your page to find out where the anchor's display is being set and either modify that or set the element to display:inline after that. As you've already added

Is a C++ optimizer allowed to move statements across a function call?

≡放荡痞女 提交于 2019-12-04 23:35:39
Note: No multithreading at all here. Just optimized single-threaded code. A function call introduces a sequence point . (Apparently.) Does it follow that a compiler (if the optimizer inlines the function) is not allowed to move/intermingle any instructions prior/after with the function's instructions? (As long as it can "proove" no observable effects obviously.) Explanatory background: Now, there is a nice article wrt. a benchmarking class for C++, where the author stated: The code we time won’t be rearranged by the optimizer and will always lie between those start / end calls to now(), so we

Behavior of __LINE__ in inline functions

主宰稳场 提交于 2019-12-04 23:10:55
I have a macro that passes the line number and file name to an error handler: #define SYSTEM_FAILURE (error_code, comment) \ System_Failure((error_code), (comment), __LINE__, __FILE__); How will the __LINE__ be resolved when used inside an inlined function? file.h: inline int divide(int x, int y) { if (y == 0) { SYSTEM_FAILURE(ENUM_DIVIDE_BY_ZERO, "divide by zero error"); } return x/y; } Will __LINE__ contain the line number within the header file, or the line number of the source file where the inline function is called (assuming compiler does a "paste" in the source code)? In C and C++,