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POpthread accessing it from a Class, variables are lost, when directly works fine
primarykey
Id
9944517
data
AcceptedAnswerId
9944566
AnswerCount
4
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2012-03-30T14:04:19.190
FavoriteCount
3
LastActivityDate
2012-03-30T21:03:07.983
LastEditDate
LastEditorUserId
0
OwnerUserId
668138
ParentId
0
PostTypeId
1
Score
2
ViewCount
1222
LastEditorDisplayName
text
Body
Well I'm trying to set a variable to use in a thread, it works fine if I call the pthread from the main function, but if I call it from a function or a function inside a class, the variable is lost and prints garbage instead, that's why I added the condition <blockquote> if(this->pickup < 7) </blockquote> so I minimized the code so I could post it here because it has all the examples I'm saying. The output of this code below is: <blockquote> Access by Class: Hello, world! < Access Directly: Hello, world!, N: 6< </blockquote> I would like to have the same result as in Access Directly in Access by Class, I want it to output the ", N: 6" because after all it was defined. what am I missing here? I hope I was clear enough, thanks in advance. (By the way, I'm using the pthread library that is available for windows) so here is the code: <pre><code>#include <stdio.h> #include <pthread.h> #include <iostream> #include <conio.h> #include <windows.h> class C { public: int pickup; void *hello() { std::cout << "\nHello, world!"; if(this->pickup < 7) std::cout << ", N: " << this->pickup; std::cout << "<" << std::endl; printf("HI"); return 0; } static void *hello_helper(void *context) { return ((C *)context)->hello(); } void StartThread(){ C c; c.pickup = 6; pthread_t t; pthread_create(&t, NULL, &C::hello_helper, &c); } }; int main () { C c; std::cout << "Access by Class: \n"; c.StartThread(); c.pickup = 6; Sleep(2000); std::cout << "\nAccess Directly: \n"; pthread_t t; pthread_create(&t, NULL, &C::hello_helper, &c); _getch(); return 0; } </code></pre>
Tags
<c++><pthreads>
Title
pthread accessing it from a Class, variables are lost, when directly works fine
singulars
PostAcceptedAnswerId
1. PO
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 PostTypePostTypeId
 PTAnswer
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1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. This table or related slice is empty.
UserOwnerUserId
1. USGrego
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1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
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 PTAnswer
2. PO
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 PTAnswer
3. PO
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 PostTypePostTypeId
 PTAnswer
VotesPostIdCreationDate
1. VO
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 PostPostId
 POpthread accessing it from a Class, variables are lost, when directly works fine
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 VTUpMod
2. VO
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 POpthread accessing it from a Class, variables are lost, when directly works fine
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 USGrego
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1. This table or related slice is empty.

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