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1 /* MIPS SDE threads compatibility routines for libgcc2 and libobjc. */
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2 /* Compile this one with gcc. */
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3 /* Copyright (C) 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
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4 Contributed by Nigel Stephens <nigel@mips.com>
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5
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6 This file is part of GCC.
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7
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8 GCC is free software; you can redistribute it and/or modify it under
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9 the terms of the GNU General Public License as published by the Free
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10 Software Foundation; either version 3, or (at your option) any later
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11 version.
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12
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13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 Under Section 7 of GPL version 3, you are granted additional
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19 permissions described in the GCC Runtime Library Exception, version
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20 3.1, as published by the Free Software Foundation.
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21
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22 You should have received a copy of the GNU General Public License and
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23 a copy of the GCC Runtime Library Exception along with this program;
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24 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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25 <http://www.gnu.org/licenses/>. */
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26
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27 #ifndef GCC_GTHR_MIPSSDE_H
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28 #define GCC_GTHR_MIPSSDE_H
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29
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30 /* MIPS SDE threading API specific definitions.
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31 Easy, since the interface is pretty much one-to-one. */
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32
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33 #define __GTHREADS 1
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34
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35 #include <sdethread.h>
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36 #include <unistd.h>
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37
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38 #ifdef __cplusplus
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39 extern "C" {
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40 #endif
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41
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42 typedef __sdethread_key_t __gthread_key_t;
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43 typedef __sdethread_once_t __gthread_once_t;
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44 typedef __sdethread_mutex_t __gthread_mutex_t;
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45
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46 typedef struct {
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47 long depth;
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48 __sdethread_t owner;
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49 __sdethread_mutex_t actual;
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50 } __gthread_recursive_mutex_t;
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51
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52 #define __GTHREAD_MUTEX_INIT __SDETHREAD_MUTEX_INITIALIZER("gthr")
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53 #define __GTHREAD_ONCE_INIT __SDETHREAD_ONCE_INIT
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54 static inline int
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55 __gthread_recursive_mutex_init_function(__gthread_recursive_mutex_t *__mutex);
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56 #define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function
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57
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58 #if SUPPORTS_WEAK && GTHREAD_USE_WEAK
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59 # define __gthrw(name) \
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60 static __typeof(name) __gthrw_ ## name __attribute__ ((__weakref__(#name)));
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61 # define __gthrw_(name) __gthrw_ ## name
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62 #else
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63 # define __gthrw(name)
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64 # define __gthrw_(name) name
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65 #endif
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66
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67 __gthrw(__sdethread_once)
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68 __gthrw(__sdethread_key_create)
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69 __gthrw(__sdethread_key_delete)
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70 __gthrw(__sdethread_getspecific)
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71 __gthrw(__sdethread_setspecific)
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72
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73 __gthrw(__sdethread_self)
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74
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75 __gthrw(__sdethread_mutex_lock)
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76 __gthrw(__sdethread_mutex_trylock)
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77 __gthrw(__sdethread_mutex_unlock)
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78
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79 __gthrw(__sdethread_mutex_init)
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80
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81 __gthrw(__sdethread_threading)
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82
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83 #if SUPPORTS_WEAK && GTHREAD_USE_WEAK
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84
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85 static inline int
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86 __gthread_active_p (void)
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87 {
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88 return !!(void *)&__sdethread_threading;
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89 }
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90
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91 #else /* not SUPPORTS_WEAK */
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92
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93 static inline int
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94 __gthread_active_p (void)
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95 {
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96 return 1;
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97 }
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98
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99 #endif /* SUPPORTS_WEAK */
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100
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101 static inline int
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102 __gthread_once (__gthread_once_t *__once, void (*__func) (void))
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103 {
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104 if (__gthread_active_p ())
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105 return __gthrw_(__sdethread_once) (__once, __func);
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106 else
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107 return -1;
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108 }
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109
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110 static inline int
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111 __gthread_key_create (__gthread_key_t *__key, void (*__dtor) (void *))
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112 {
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113 return __gthrw_(__sdethread_key_create) (__key, __dtor);
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114 }
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115
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116 static inline int
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117 __gthread_key_delete (__gthread_key_t __key)
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118 {
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119 return __gthrw_(__sdethread_key_delete) (__key);
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120 }
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121
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122 static inline void *
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123 __gthread_getspecific (__gthread_key_t __key)
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124 {
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125 return __gthrw_(__sdethread_getspecific) (__key);
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126 }
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127
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128 static inline int
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129 __gthread_setspecific (__gthread_key_t __key, const void *__ptr)
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130 {
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131 return __gthrw_(__sdethread_setspecific) (__key, __ptr);
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132 }
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133
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134 static inline int
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135 __gthread_mutex_destroy (__gthread_mutex_t * UNUSED(__mutex))
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136 {
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137 return 0;
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138 }
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139
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140 static inline int
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141 __gthread_mutex_lock (__gthread_mutex_t *__mutex)
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142 {
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143 if (__gthread_active_p ())
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144 return __gthrw_(__sdethread_mutex_lock) (__mutex);
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145 else
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146 return 0;
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147 }
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148
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149 static inline int
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150 __gthread_mutex_trylock (__gthread_mutex_t *__mutex)
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151 {
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152 if (__gthread_active_p ())
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153 return __gthrw_(__sdethread_mutex_trylock) (__mutex);
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154 else
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155 return 0;
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156 }
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157
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158 static inline int
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159 __gthread_mutex_unlock (__gthread_mutex_t *__mutex)
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160 {
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161 if (__gthread_active_p ())
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162 return __gthrw_(__sdethread_mutex_unlock) (__mutex);
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163 else
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164 return 0;
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165 }
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166
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167 static inline int
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168 __gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *__mutex)
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169 {
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170 __mutex->depth = 0;
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171 __mutex->owner = __gthrw_(__sdethread_self) ();
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172 return __gthrw_(__sdethread_mutex_init) (&__mutex->actual, NULL);
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173 }
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174
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175 static inline int
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176 __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *__mutex)
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177 {
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178 if (__gthread_active_p ())
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179 {
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180 __sdethread_t __me = __gthrw_(__sdethread_self) ();
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181
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182 if (__mutex->owner != __me)
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183 {
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184 __gthrw_(__sdethread_mutex_lock) (&__mutex->actual);
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185 __mutex->owner = __me;
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186 }
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187
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188 __mutex->depth++;
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189 }
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190 return 0;
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191 }
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192
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193 static inline int
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194 __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *__mutex)
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195 {
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196 if (__gthread_active_p ())
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197 {
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198 __sdethread_t __me = __gthrw_(__sdethread_self) ();
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199
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200 if (__mutex->owner != __me)
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201 {
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202 if (__gthrw_(__sdethread_mutex_trylock) (&__mutex->actual))
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203 return 1;
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204 __mutex->owner = __me;
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205 }
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206
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207 __mutex->depth++;
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208 }
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209 return 0;
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210 }
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211
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212 static inline int
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213 __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *__mutex)
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214 {
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215 if (__gthread_active_p ())
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216 {
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217 if (--__mutex->depth == 0)
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218 {
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219 __mutex->owner = (__sdethread_t) 0;
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220 __gthrw_(__sdethread_mutex_unlock) (&__mutex->actual);
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221 }
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222 }
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223 return 0;
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224 }
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225
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226 #ifdef __cplusplus
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227 }
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228 #endif
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229
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230 #endif /* ! GCC_GTHR_MIPSSDE_H */
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