author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 31 Aug 2010 16:54:36 +0300 | |
branch | RCL_3 |
changeset 56 | acd3cd4aaceb |
parent 0 | e4d67989cc36 |
permissions | -rw-r--r-- |
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// Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies). |
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// All rights reserved. |
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// This component and the accompanying materials are made available |
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// under the terms of "Eclipse Public License v1.0" |
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// which accompanies this distribution, and is available |
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// at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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// |
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// Initial Contributors: |
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// Nokia Corporation - initial contribution. |
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// |
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// Contributors: |
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// |
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// Description: |
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// Name : getpriority.cpp |
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// Part of : LIBC |
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// Contains the source for fchdir |
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// Version : 1.0 |
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// |
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#include <sys/time.h> |
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#include <sys/resource.h> |
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#include <errno.h> |
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#include <e32std.h> |
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#include <e32const.h> |
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#if (defined(__SYMBIAN32__) && (defined(__WINSCW__) || defined(__WINS__))) |
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#include "libc_wsd_defs.h" |
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#endif |
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#ifdef EMULATOR |
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GET_GLOBAL_VAR_FROM_TLS(ProcPriority, int) |
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#define ProcPriority (*GET_WSD_VAR_NAME(ProcPriority, g)()) |
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#else //EMULATOR |
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int ProcPriority = 0; |
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#endif //EMULATOR |
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|
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/* |
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This function checks the range in which the priority of the process falls |
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and returns the same to the function getpriority(). If the value is out of |
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range it returns -1. |
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*/ |
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|
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int convPri( TProcessPriority pri) |
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{ |
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int priority; |
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|
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if(((pri == EPriorityLow ) && |
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( (ProcPriority >= UPPER_LIMIT_PRIORITY_LOWEST) && |
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( ProcPriority <= LOWER_LIMIT_PRIORITY_LOWEST) ))|| |
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( pri == EPriorityBackground && |
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( (ProcPriority >= UPPER_LIMIT_PRIORITY_BELOW_NORMAL) && |
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( ProcPriority <= LOWER_LIMIT_PRIORITY_BELOW_NORMAL) )) || |
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( pri == EPriorityForeground && |
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( (ProcPriority >= UPPER_LIMIT_PRIORITY_NORMAL) && |
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( ProcPriority <= LOWER_LIMIT_PRIORITY_NORMAL) )) || |
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( pri == EPriorityHigh && |
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( (ProcPriority >= UPPER_LIMIT_PRIORITY_ABOVE_NORMAL) && |
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( ProcPriority <= LOWER_LIMIT_PRIORITY_ABOVE_NORMAL) ))|| |
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( pri == EPriorityRealTimeServer && |
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( (ProcPriority >= UPPER_LIMIT_PRIORITY_HIGHEST) && |
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( ProcPriority <= LOWER_LIMIT_PRIORITY_HIGHEST) ))) |
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{ |
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priority = ProcPriority; |
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} |
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else |
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{ |
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priority = -1; |
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errno = EINVAL; |
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} |
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return priority; |
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} |
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|
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/* |
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This function checks if the which and who parameters sent are |
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'the process priority' and 'the current process' respectively, |
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i.e. PROC_PROCESS and 0 respectively. And calls the function |
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convPri() to check in which range the priority falls and returns |
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likewise. |
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It returns a value in the range -20 to 19 on success and -1 is a |
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legitimate return value,so user has to check the errno to be sure |
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of failure. |
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The function getpriority() shall ignore the values PRIO_PGRP, |
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PRIO_USER as the argument 'which' and any other value other than |
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0 for 'who' shall not be considered. |
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*/ |
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|
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extern "C" { |
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|
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EXPORT_C int getpriority(int which, int who) |
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{ |
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int priority = -1; |
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if ( which == PRIO_PROCESS && who == 0 ) |
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{ |
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RProcess pro; |
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TProcessPriority pri; |
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pri = pro.Priority(); |
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priority = convPri( pri ); |
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} |
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else |
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{ |
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errno = ENOSYS; |
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} |
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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return priority; |
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} |
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|
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} //extern "C" |