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1 // Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // Name : getpriority.cpp |
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15 // Part of : LIBC |
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16 // Contains the source for fchdir |
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17 // Version : 1.0 |
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18 // |
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19 |
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20 |
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21 |
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22 #include <sys/time.h> |
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23 #include <sys/resource.h> |
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24 #include <errno.h> |
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25 #include <e32std.h> |
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26 #include <e32const.h> |
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27 |
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28 #if (defined(__SYMBIAN32__) && (defined(__WINSCW__) || defined(__WINS__))) |
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29 #include "libc_wsd_defs.h" |
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30 #endif |
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31 |
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32 #ifdef EMULATOR |
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33 GET_GLOBAL_VAR_FROM_TLS(ProcPriority, int) |
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34 #define ProcPriority (*GET_WSD_VAR_NAME(ProcPriority, g)()) |
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35 #else //EMULATOR |
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36 int ProcPriority = 0; |
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37 #endif //EMULATOR |
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38 |
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39 /* |
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40 This function checks the range in which the priority of the process falls |
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41 and returns the same to the function getpriority(). If the value is out of |
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42 range it returns -1. |
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43 */ |
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44 |
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45 int convPri( TProcessPriority pri) |
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46 { |
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47 int priority; |
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48 |
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49 if(((pri == EPriorityLow ) && |
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50 ( (ProcPriority >= UPPER_LIMIT_PRIORITY_LOWEST) && |
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51 ( ProcPriority <= LOWER_LIMIT_PRIORITY_LOWEST) ))|| |
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52 ( pri == EPriorityBackground && |
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53 ( (ProcPriority >= UPPER_LIMIT_PRIORITY_BELOW_NORMAL) && |
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54 ( ProcPriority <= LOWER_LIMIT_PRIORITY_BELOW_NORMAL) )) || |
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55 ( pri == EPriorityForeground && |
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56 ( (ProcPriority >= UPPER_LIMIT_PRIORITY_NORMAL) && |
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57 ( ProcPriority <= LOWER_LIMIT_PRIORITY_NORMAL) )) || |
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58 ( pri == EPriorityHigh && |
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59 ( (ProcPriority >= UPPER_LIMIT_PRIORITY_ABOVE_NORMAL) && |
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60 ( ProcPriority <= LOWER_LIMIT_PRIORITY_ABOVE_NORMAL) ))|| |
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61 ( pri == EPriorityRealTimeServer && |
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62 ( (ProcPriority >= UPPER_LIMIT_PRIORITY_HIGHEST) && |
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63 ( ProcPriority <= LOWER_LIMIT_PRIORITY_HIGHEST) ))) |
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64 { |
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65 priority = ProcPriority; |
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66 } |
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67 else |
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68 { |
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69 priority = -1; |
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70 errno = EINVAL; |
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71 } |
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72 return priority; |
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73 } |
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74 |
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75 /* |
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76 This function checks if the which and who parameters sent are |
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77 'the process priority' and 'the current process' respectively, |
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78 i.e. PROC_PROCESS and 0 respectively. And calls the function |
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79 convPri() to check in which range the priority falls and returns |
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80 likewise. |
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81 It returns a value in the range -20 to 19 on success and -1 is a |
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82 legitimate return value,so user has to check the errno to be sure |
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83 of failure. |
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84 The function getpriority() shall ignore the values PRIO_PGRP, |
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85 PRIO_USER as the argument 'which' and any other value other than |
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86 0 for 'who' shall not be considered. |
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87 */ |
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88 |
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89 extern "C" { |
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90 |
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91 EXPORT_C int getpriority(int which, int who) |
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92 { |
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93 int priority = -1; |
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94 if ( which == PRIO_PROCESS && who == 0 ) |
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95 { |
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96 RProcess pro; |
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97 TProcessPriority pri; |
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98 pri = pro.Priority(); |
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99 priority = convPri( pri ); |
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100 } |
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101 else |
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102 { |
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103 errno = ENOSYS; |
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104 } |
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105 return priority; |
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106 } |
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107 |
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108 } //extern "C" |