Re: Cycle detected between modules with ctors/dtors
On 3/3/15 4:24 PM, rumbu wrote: On Tuesday, 3 March 2015 at 18:55:49 UTC, Steven Schveighoffer wrote: Only one of the listed modules has a static contructor (system.globalization) and that constructor doesn't use any information from other modules. It's a complex problem. Because we don't control the linker, we cannot establish an order of execution for the module system. It must be a directed acyclic graph. Although, cycles are allowed that only involve a single module with ctor/dtors, or with no ctor/dtors. But we have to detect it at runtime during startup. two of those modules should have static ctor or dtor (they may have either to cause the error). The message is not too helpful, I have no clue where to start searching for the error source, the source code has more than 25k LOC. In fact, I don't believe this error is true, since I have only two non-linked modules with static contructors. Just look for static this and static ~this inside those files identified. -Steve One of the listed modules had a ctor. Another one - curiously - not listed in the cyclic error - had a static dtor, and this module was imported by two of them. curiously not listed? That doesn't make any sense. If there is not a cycle in the listed modules, where at least 2 modules have a static ctor or static dtor, then there is a bug in the cycle detection code. Anyway, reduced case scenario: module a; import b; static this(); - module b; import a; static ~this(); As I supposed, this is a false error, the order of execution seems very clear to me, but not for the runtime. Even if I have two ctors, I think it's better to relax this rule, maybe the constructors are not dependent one of each other to have cyclic errors. In my case, one of the constructors loads some resources bound to the executable and the destructor is simply a winapi call to CoUninitialize, totally unrelated. Clearly, the above is not an issue, but at the moment, the code treats having a ctor and having a dtor as the same thing. How to fix it? I'm not exactly sure, you need to have the modules sorted according to ctor and also according to dtor. The runtime is supposed to run dtors in reverse order from ctor calls, and I think we should not break that. But there is definitely room to allow for reordering when ctors are not affected. I'll have to think about it some more. -Steve
Re: Cycle detected between modules with ctors/dtors
On Wednesday, 4 March 2015 at 16:08:00 UTC, Steven Schveighoffer wrote: curiously not listed? That doesn't make any sense. If there is not a cycle in the listed modules, where at least 2 modules have a static ctor or static dtor, then there is a bug in the cycle detection code. Source code is available here: https://github.com/rumbu13/sharp The runtime error chain was system.globalization - internals.locale - system.runtime.interopservices - system.io - system.globalization Three of these modules import internals.resources containing a static constructor. The static dtor is in system.runtime.interopservices. Clearly, the above is not an issue, but at the moment, the code treats having a ctor and having a dtor as the same thing. How to fix it? I'm not exactly sure, you need to have the modules sorted according to ctor and also according to dtor. The runtime is supposed to run dtors in reverse order from ctor calls, and I think we should not break that. But there is definitely room to allow for reordering when ctors are not affected. I'll have to think about it some more. -Steve Why bother? I'll leave this to the programmer, he can take full responsibility to not mess up module ctors/dtors. I remember the old Delphi days where this was assumed from the start: initialization and finalization order of execution (equivalent of static ctor/dtor) were not guaranteed. It was better to obtain an AccessViolation or a StackOverflow and correct the circular reference, instead of a NEVER running executable.
Re: Filling a char array with letters and element type of char[]
@Tobias @Ali @Jonathan @Steven Thanks alot for your answers. I will try to learn as much as I can from them. Regards Erdem
Re: Cycle detected between modules with ctors/dtors
On Wed, 04 Mar 2015 11:06:50 -0500, Steven Schveighoffer wrote: Clearly, the above is not an issue, but at the moment, the code treats having a ctor and having a dtor as the same thing. How to fix it? I'm not exactly sure, you need to have the modules sorted according to ctor and also according to dtor. The runtime is supposed to run dtors in reverse order from ctor calls, and I think we should not break that. But there is definitely room to allow for reordering when ctors are not affected. I'll have to think about it some more. maybe do simply the thing you wrote, and have two independent lists. or, strictly saying, four independent lists: for shared ctors, for static ctors, for static dtors, for shared dtors. signature.asc Description: PGP signature
how to write a string to a c pointer?
I am writing a asio binding. Objects need to be serialized into a
buffer (void *),
for example, write utf8 string into buffer,
write int into buffer,
write long into buffer,
Here is my class
class Buffer
{
private void *ptr;
private int size;
private int _cap;
public this(int cap)
{
ptr = malloc(cap);
this._cap = cap;
}
public ~this()
{
free(ptr);
}
public ubyte[] asArray()
{
ubyte[] ret = (cast(ubyte*)ptr)[0..cap];
return ret;
}
public void* getPtr()
{
return ptr;
}
public int cap()
{
return _cap;
}
}
how can i write a utf8 string into the buffer?
Re: I want to introduce boost_asio to dlang
On Thu, 05 Mar 2015 06:05:55 +, zhmt wrote: But I am not familiar with dlang this is the root of the problem. please, make yourself familiar before starting to wrap boost crap. you may find that you don't need it at all. signature.asc Description: PGP signature
Getting the socket information from HTTP and DNS sessions
I have been ask to write a test tool which initiates DNS-HTTP-HTTPS-TCP sessions. And ofcourse I wrote this with D. For HTTP I used std.net like m_HTTP = HTTP(m_url);m_HTTP.perform(); For DNS I simply used getAddressInfo(m_domainName); Than tool makes some simple checks which are npt subjects of this thread and the tool works well, But now I need to make an improvement. I need to get sourceIP(ip which program runs), sourcePort( eg: 53212 not 80), destIP, destPort(most probably 80) from the session which I initiated. I need functions like std.socket.localAddress, std.socket.remoteAddress for HTTP-DNS but couldn't managed to find them. Is there any way that I can get socket info in HTTP and DNS sessions which I initiated? Regards Kadir Erdem
I want to introduce boost_asio to dlang
I am a gameserver developer, my programming lang is java now. I want to change java to dlang, and I like boost_asio and it's coroutine, so, I want to create a binding of boost_asio. But I am not familiar with dlang, so I want to find someone help me, or develope this binding with me. I will put the asio binding on github, and opensource, and free. Anybody help or join?
Re: is expression and type tuples
Jack Applegame:
On Tuesday, 3 March 2015 at 17:49:24 UTC, bearophile wrote:
That's 1 + n-1 :-)
Could you please explain what does '1 + n-1' mean?
This is your code:
template Is(ARGS...) if(ARGS.length % 2 == 0) {
enum N = ARGS.length/2;
static if(N == 1) enum Is = is(ARGS[0] : ARGS[1]);
else enum Is = is(ARGS[0] : ARGS[N]) Is!(ARGS[1..N],
ARGS[N+1..$]);
}
The recursion scheme you are using is working on a single item (a
single pair of items), and then calling the recursion on all
other items but the first.
If you look in std.traits you see examples of a different
recursion that reduces compilation time:
template isExpressionTuple(T ...)
{
static if (T.length = 2)
enum bool isExpressionTuple =
isExpressionTuple!(T[0 .. $/2])
isExpressionTuple!(T[$/2 .. $]);
else static if (T.length == 1)
enum bool isExpressionTuple =
!is(T[0]) __traits(compiles, { auto ex = T[0]; });
else
enum bool isExpressionTuple = true; // default
}
Bye,
bearophile
Incorrect display in Cyrillic Windows
Hi.
It's normal for Windows?
http://i.imgur.com/TEx4H3k.png
import std.uni;
import std.stdio;
void main() {
string s;
foreach(ch; CodepointSet('А', 'Я' + 1, 'а', 'я' + 1).byCodepoint)
s ~= ch;
writeln(s);
writeln(s[0] = , s[0]);
}
Re: Incorrect display in Cyrillic Windows
On Wednesday, 4 March 2015 at 11:32:40 UTC, Dennis Ritchie wrote: Hi. It's normal for Windows? You have to set your console encoding to UTF-8 first. You can do it by command chcp 65001 or by calling Windows API function: extern(Windows) BOOL SetConsoleOutputCP( UINT ); SetConsoleOutputCP( 65001 ); Also change your font to Lucida Console.
[rosettacode] std.container.DList problems
This code used to work in DMD 2.065:
http://rosettacode.org/wiki/Strand_sort#D
import std.stdio, std.container;
DList!T strandSort(T)(DList!T list) {
static DList!T merge(DList!T left, DList!T right) {
DList!T result;
while (!left.empty !right.empty) {
if (left.front = right.front) {
result.insertBack(left.front);
left.removeFront();
} else {
result.insertBack(right.front);
right.removeFront();
}
}
result.insertBack(left[]);
result.insertBack(right[]);
return result;
}
DList!T result, sorted, leftover;
while (!list.empty) {
leftover.clear();
sorted.clear();
sorted.insertBack(list.front);
list.removeFront();
foreach (item; list) {
if (sorted.back = item)
sorted.insertBack(item);
else
leftover.insertBack(item);
}
result = merge(sorted, result);
list = leftover;
}
return result;
}
void main() {
auto lst = DList!int([-2,0,-2,5,5,3,-1,-3,5,5,0,2,-4,4,2]);
foreach (e; lst.strandSort)
write(e, );
}
Now it gives a runtime error like
phobos\std\container\dlist.d(329): DList.front: List is empty.
I think the cause is that list = leftover; has a different
semantics. Is this a regression fit for Bugzilla?
Bye,
bearophile
Re: Incorrect display in Cyrillic Windows
https://issues.dlang.org/show_bug.cgi?id=2742
Re: Incorrect display in Cyrillic Windows
On Wednesday, 4 March 2015 at 12:14:01 UTC, Martin Krejcirik wrote: You have to set your console encoding to UTF-8 first. You can do it by command chcp 65001 or by calling Windows API function: extern(Windows) BOOL SetConsoleOutputCP( UINT ); SetConsoleOutputCP( 65001 ); Also change your font to Lucida Console. Thanks.
