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What kind of threads are you using ? pthreads ?
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I am working in Windows.It is windows worker thread
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&gt;&gt; If you need to signal between threads you probably need to use with an Event or a Condition Variable. 
The crude example, below, gives shows using events to signal between threads. 
 

<pre><code class="code-10 nolinks" id="code-122298">#include &lt;windows.h&gt;
#include &lt;process.h&gt;
#include &lt;signal.h&gt;
#include &lt;stdio.h&gt;
#include &lt;stdlib.h&gt;
 
HANDLE hWaitEvent1 = CreateEvent(0, true, true, 0);
HANDLE hStopEvent = CreateEvent(0, true, false, 0);
 
DWORD WINAPI ThreadProc(void * lpParameter)
{
	puts(&quot;Thread starting&quot;);
 
	for(;;)
	{
		// If signaled then break
		if(0 == WaitForSingleObject(hStopEvent, 0)) { break; }
 
		// If not signaled then wait indefinately
		WaitForSingleObject(hWaitEvent1, INFINITE);
 
		// Some IO for th euser
		puts(&quot;Thread running&quot;);
 
		// Give other threads/processes a chance
		::Sleep(500);
	}
 
	puts(&quot;Thread stopped&quot;);
 
	return 0;
}
 
int main()
{
	HANDLE hThread = CreateThread(0, 0, ThreadProc, 0, 0, 0);
 
	system(&quot;pause&quot;);
	ResetEvent(hWaitEvent1); // Signal thread to pause
 
	system(&quot;pause&quot;);
	SetEvent(hWaitEvent1); // Signal thread to unpause
 
	system(&quot;pause&quot;);
	SetEvent(hStopEvent); // Signal thread to stop
 
	WaitForSingleObject(hThread, INFINITE); // Wait for thread to terminate
	system(&quot;pause&quot;);
}
</code></pre>
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<div class="content wysiwyg-content">
Hi, 
I have two thread .One name as ONLINE and other as OFFLINE thread.both the thread is in DLL that is getting loaded dynamically and after processing it has to unload. 
requriment: 
Online thread is for online processing and OFFLINE thread is for batch processing.suppose there is one event .whenever that even got fire online thread start executing. 
Offline thread run on periodic basis. After every such period , it will check DLL.if it is loaded , then call the function and in that function, a offline thread get created and start executing.In between while executing the offline thread, online thread event got fired.Application has to suspend offline thread and start executing online thread .and once it is done, I have to resume offline thread. 
 
So basically we need to do communication between OFFLINE and Online thread.can any one please help me . 
 
Regards
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Hi,
I have two thread .One name as ONLINE and other as OFFLINE thread.both the thread is in DLL that is getting loaded dynamically and after processing it has to unload.
requriment:
Online thread is for online processing and OFFLINE thread is for batch processing.suppose there is one event .whenever that even got fire online thread start executing.
Offline thread run on periodic basis. After every such period , it will check DLL.if it is loaded , then call the function and in that function, a offline thread get created and start executing.In between while executing the offline thread, online thread event got fired.Application has to suspend offline thread and start executing online thread .and once it is done, I have to resume offline thread.

So basically we need to do communication between OFFLINE and Online thread.can any one please help me .

Regards

communication beteen two thread

C is a general-purpose, imperative computer programming language, supporting structured programming, lexical variable scope and recursion, while a static type system prevents many unintended operations. By design, C provides constructs that map efficiently to typical machine instructions, so it has found lasting use in applications that had formerly been coded in assembly language, including operating systems as well as various application software for computers ranging from supercomputers to embedded systems. It is distinct from C++ (which has its roots in C) and C#, and many later languages have borrowed directly or indirectly from C.