1 /* |
1 /* |
2 * Copyright 2012, 2013 SAP AG. All rights reserved. |
2 * Copyright 2012, 2015 SAP AG. All rights reserved. |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * |
4 * |
5 * This code is free software; you can redistribute it and/or modify it |
5 * This code is free software; you can redistribute it and/or modify it |
6 * under the terms of the GNU General Public License version 2 only, as |
6 * under the terms of the GNU General Public License version 2 only, as |
7 * published by the Free Software Foundation. |
7 * published by the Free Software Foundation. |
20 * or visit www.oracle.com if you need additional information or have any |
20 * or visit www.oracle.com if you need additional information or have any |
21 * questions. |
21 * questions. |
22 * |
22 * |
23 */ |
23 */ |
24 |
24 |
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25 #ifndef OS_AIX_VM_PORTING_AIX_HPP |
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26 #define OS_AIX_VM_PORTING_AIX_HPP |
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27 |
25 #include <stddef.h> |
28 #include <stddef.h> |
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29 |
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30 // PPC port only: |
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31 #define assert0(b) assert( (b), "" ) |
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32 #define guarantee0(b) assert( (b), "" ) |
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33 template <class T1, class T2> bool is_aligned_to(T1 what, T2 alignment) { |
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34 return ( ((uintx)(what)) & (((uintx)(alignment)) - 1) ) == 0 ? true : false; |
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35 } |
26 |
36 |
27 // Header file to contain porting-relevant code which does not have a |
37 // Header file to contain porting-relevant code which does not have a |
28 // home anywhere else and which can not go into os_<platform>.h because |
38 // home anywhere else and which can not go into os_<platform>.h because |
29 // that header is included inside the os class definition, hence all |
39 // that header is included inside the os class definition, hence all |
30 // its content is part of the os class. |
40 // its content is part of the os class. |
77 char* p_name, size_t namelen, // [out] optional: user provided buffer for the function name |
87 char* p_name, size_t namelen, // [out] optional: user provided buffer for the function name |
78 int* p_displacement, // [out] optional: displacement |
88 int* p_displacement, // [out] optional: displacement |
79 const struct tbtable** p_tb, // [out] optional: ptr to traceback table to get further information |
89 const struct tbtable** p_tb, // [out] optional: ptr to traceback table to get further information |
80 char* p_errmsg, size_t errmsglen // [out] optional: user provided buffer for error messages |
90 char* p_errmsg, size_t errmsglen // [out] optional: user provided buffer for error messages |
81 ); |
91 ); |
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92 |
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93 // ------------------------------------------------------------------------- |
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94 |
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95 // A simple critical section which shall be based upon OS critical |
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96 // sections (CRITICAL_SECTION resp. Posix Mutex) and nothing else. |
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97 |
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98 #include <pthread.h> |
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99 |
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100 namespace MiscUtils { |
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101 typedef pthread_mutex_t critsect_t; |
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102 |
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103 inline void init_critsect(MiscUtils::critsect_t* cs) { |
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104 pthread_mutex_init(cs, NULL); |
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105 } |
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106 inline void free_critsect(MiscUtils::critsect_t* cs) { |
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107 pthread_mutex_destroy(cs); |
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108 } |
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109 inline void enter_critsect(MiscUtils::critsect_t* cs) { |
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110 pthread_mutex_lock(cs); |
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111 } |
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112 inline void leave_critsect(MiscUtils::critsect_t* cs) { |
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113 pthread_mutex_unlock(cs); |
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114 } |
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115 |
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116 // Need to wrap this in an object because we need to dynamically initialize |
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117 // critical section (because of windows, where there is no way to initialize |
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118 // a CRITICAL_SECTION statically. On Unix, we could use |
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119 // PTHREAD_MUTEX_INITIALIZER) |
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120 |
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121 // Note: The critical section does NOT get cleaned up in the destructor. That is |
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122 // by design: the CritSect class is only ever used as global objects whose |
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123 // lifetime spans the whole VM life; in that context we don't want the lock to |
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124 // be cleaned up when global C++ objects are destroyed, but to continue to work |
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125 // correctly right to the very end of the process life. |
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126 class CritSect { |
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127 critsect_t _cs; |
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128 public: |
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129 CritSect() { init_critsect(&_cs); } |
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130 //~CritSect() { free_critsect(&_cs); } |
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131 void enter() { enter_critsect(&_cs); } |
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132 void leave() { leave_critsect(&_cs); } |
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133 }; |
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134 |
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135 class AutoCritSect { |
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136 CritSect* const _pcsobj; |
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137 public: |
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138 AutoCritSect(CritSect* pcsobj) |
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139 : _pcsobj(pcsobj) |
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140 { |
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141 _pcsobj->enter(); |
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142 } |
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143 ~AutoCritSect() { |
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144 _pcsobj->leave(); |
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145 } |
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146 }; |
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147 |
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148 } |
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149 |
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150 #endif // OS_AIX_VM_PORTING_AIX_HPP |