| Topic: |
DEVELOP > c-Plus-Plus |
| User: |
"Heiko Neuhaus" |
| Date: |
20 Dec 2003 07:48:48 PM |
| Object: |
POSIX Threads causing memory leak |
Hello all,
i am Cygwin to create a simple server application. Everything seems to work
fine but when i use the process manager i can see that my app is leaking
handles. If i run it under native linux it crashes after seveal minutes -
which seems to be caused from this error.
// Dummy
class tSockInfo
{
public:
int iPort;
char chIP[4]; int iSocketZ;
bool bAllForward;
int iSocket;
tSockInfo() { bAllForward = false; iSocket = -1; iSocketZ = -1; };
};
// Thread-Procedure
void* dummyThreadProc (void* pArgs)
{
tSockInfo* sockinfo = (tSockInfo*)pArgs;
int q;
close (sockinfo->iSocket);
delete ((tSockInfo*)pArgs);
pthread_exit (NULL);
}
// Main-Routine
int main()
{
int iSocket = socket (AF_INET, SOCK_STREAM, 0);
sockaddr_in saddr = {0};
saddr.sin_family = AF_INET;
saddr.sin_port = htons (socksport);
saddr.sin_addr.s_addr = htonl (INADDR_ANY);
if (bind (iSocket, (sockaddr*)(&saddr), sizeof (saddr)))
{
die ("Unable to bind socket to port. Exiting.");
}
if (listen (iSocket, 5))
{
die ("Unable to listen on port. Exiting.");
}
while (1)
{
int iLen = 0;
sockaddr asin;
int ASock = accept (iSocket, (sockaddr*)&asin, &iLen);
if (ASock < 0)
{
die ("Accept returned invalid socket. Exiting.");
}
else
{
tSockInfo* sock = new tSockInfo;
sock->iSocket = ASock;
pthread_t iThreadID;
pthread_create (&iThreadID, NULL, dummyThreadProc, sock);
}
}
}
.
|
|
| User: "Paul Pluzhnikov" |
|
| Title: Re: POSIX Threads causing memory leak |
21 Dec 2003 01:16:06 AM |
|
|
"Heiko Neuhaus" <hneuhaus@uni-koblenz.de> writes:
while (1) {
....
int ASock = accept (iSocket, (sockaddr*)&asin, &iLen);
....
tSockInfo* sock = new tSockInfo;
sock->iSocket = ASock;
pthread_t iThreadID;
pthread_create (&iThreadID, NULL, dummyThreadProc, sock);
}
}
You must create your threads detached, or you must pthread_join them.
Also note that you are using a "one thread per client" pattern,
which is discouraged (it is acceptable for a homework exercise,
but it is not a good way to write production code).
Cheers,
--
In order to understand recursion you must first understand recursion.
Remove /-nsp/ for email.
.
|
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|
|
| User: "Heiko Neuhaus" |
|
| Title: Re: POSIX Threads causing memory leak |
20 Dec 2003 07:51:17 PM |
|
|
(sorry for additional posting)
The problem must be located within those 4 lines.
tSockInfo* sock = new tSockInfo;
sock->iSocket = ASock;
pthread_t iThreadID;
pthread_create (&iThreadID, NULL, dummyThreadProc, sock);
Any help would be greatly appreciated.
Thanks alot in advance.
.
|
|
|
|
| User: "Jack Klein" |
|
| Title: Re: POSIX Threads causing memory leak |
20 Dec 2003 11:43:28 PM |
|
|
On Sun, 21 Dec 2003 02:48:48 +0100, "Heiko Neuhaus"
<hneuhaus@uni-koblenz.de> wrote in comp.lang.c++:
Hello all,
i am Cygwin to create a simple server application. Everything seems to work
fine but when i use the process manager i can see that my app is leaking
handles. If i run it under native linux it crashes after seveal minutes -
which seems to be caused from this error.
[snip]
Please leave comp.lang.c++ off your cross-post list for questions like
this in the future. The C++ language does not define or support
threads, processes, or handles. These are all platform specific
extensions, and this is not a language issue.
--
Jack Klein
Home: http://JK-Technology.Com
FAQs for
comp.lang.c http://www.eskimo.com/~scs/C-faq/top.html
comp.lang.c++ http://www.parashift.com/c++-faq-lite/
alt.comp.lang.learn.c-c++ ftp://snurse-l.org/pub/acllc-c++/faq
.
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