// Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).
// All rights reserved.
// This component and the accompanying materials are made available
// under the terms of "Eclipse Public License v1.0"
// which accompanies this distribution, and is available
// at the URL "http://www.eclipse.org/legal/epl-v10.html".
//
// Initial Contributors:
// Nokia Corporation - initial contribution.
//
// Contributors:
//
// Description:
// Name : pthread_key_delete.cpp
// Part of : PThread library
// pthread_key_delete call is implemented.
// Version:
//
#include <pthread.h>
#include <errno.h>
#include "threadglobals.h"
#include "pthreadmisc.h"
static int _deleteKeyInAllThreads(_global_data_t *glbPtr, int keyNumber)
{
_pthread_node_t *temp;
_pkey_node_t *tlsPtr;
_pkey_node_t *prevTlsPtr;
//For all threads
for (temp = glbPtr->start; temp != NULL; temp = temp->next)
{
// Lock the TCB
temp->lockNode.Wait();
// Delete in a sorted list
for (tlsPtr = temp->tlsHead, prevTlsPtr = NULL;
tlsPtr != NULL;
prevTlsPtr = tlsPtr,tlsPtr = tlsPtr->next)
{
if (tlsPtr->keyNumber == keyNumber)
{
if (temp->tlsHead == tlsPtr) //first node case
{
temp->tlsHead = tlsPtr->next;
delete tlsPtr;
break; // Inner loop
}
else
{
prevTlsPtr->next = tlsPtr->next;
delete tlsPtr;
break; //Inner loop
}
}
} // Inner for loop end...
if (tlsPtr == NULL) // Means not found
{
// This should never happen; key to be deleted not exists
temp->lockNode.Signal();
User::Panic(_L("Invalid Key"),0);
return -1;
}
// Unlock TCB node
temp->lockNode.Signal();
} // end of outer for loop
return 0;
}
EXPORT_C int pthread_key_delete(pthread_key_t key)
{
_global_data_t *glbPtr;
_pthread_node_t *selfNodePtr;
THR_PRINTF("[pthread] Begin pthread_key_delete\n");
if (key >= PTHREAD_KEYS_MAX)
{
THR_PRINTF("[pthread] End pthread_key_delete\n");
return EINVAL;
}
//Get the TLS value (self node pointer)
selfNodePtr = (_pthread_node_t*) _pthread_getTls();
//coverity[var_compare_op]
if (NULL == selfNodePtr) // This should never happen
{
THR_PRINTF("[pthread] FATAL :TLS is not initialized \n");
THR_PRINTF("[pthread] Terminating the process\n");
RProcess rp;
rp.Kill(0); // Terminate the process
}
//coverity[var_deref_op]
glbPtr = selfNodePtr->glbDataPtr; // point to global struct
glbPtr->lockThreadTable.Wait(); // Acquire the thread table lock
int idx;
idx = key / 32;
int bitPos;
bitPos = key % 32;
if (((glbPtr->statusflag[idx]) & (0x1<<bitPos)) == _KEY_UNUSED)
{
THR_PRINTF("[pthread] End pthread_key_delete\n");
glbPtr->lockThreadTable.Signal(); // release thread table lock
return EINVAL;
}
glbPtr->statusflag[idx] &= ~(0x1<<bitPos); // Set it to unused.
glbPtr->pthread_key_list[key].destr = NULL;
// Delete the key in all the threads
_deleteKeyInAllThreads(glbPtr, key);
glbPtr->lockThreadTable.Signal(); // release thread table lock
THR_PRINTF("[pthread] End pthread_key_delete\n");
return 0;
}
// End of file