1 | /* -----------------------------------------------------------------*-C-*- |
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2 | libffi 3.0.10 - Copyright (c) 2011 Anthony Green |
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3 | - Copyright (c) 1996-2003, 2007, 2008 Red Hat, Inc. |
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4 | |
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5 | Permission is hereby granted, free of charge, to any person |
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6 | obtaining a copy of this software and associated documentation |
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7 | files (the ``Software''), to deal in the Software without |
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8 | restriction, including without limitation the rights to use, copy, |
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9 | modify, merge, publish, distribute, sublicense, and/or sell copies |
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10 | of the Software, and to permit persons to whom the Software is |
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11 | furnished to do so, subject to the following conditions: |
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12 | |
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13 | The above copyright notice and this permission notice shall be |
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14 | included in all copies or substantial portions of the Software. |
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15 | |
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16 | THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, |
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17 | EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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18 | MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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19 | NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT |
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20 | HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
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21 | WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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22 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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23 | DEALINGS IN THE SOFTWARE. |
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24 | |
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25 | ----------------------------------------------------------------------- */ |
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26 | |
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27 | /* ------------------------------------------------------------------- |
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28 | The basic API is described in the README file. |
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29 | |
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30 | The raw API is designed to bypass some of the argument packing |
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31 | and unpacking on architectures for which it can be avoided. |
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32 | |
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33 | The closure API allows interpreted functions to be packaged up |
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34 | inside a C function pointer, so that they can be called as C functions, |
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35 | with no understanding on the client side that they are interpreted. |
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36 | It can also be used in other cases in which it is necessary to package |
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37 | up a user specified parameter and a function pointer as a single |
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38 | function pointer. |
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39 | |
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40 | The closure API must be implemented in order to get its functionality, |
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41 | e.g. for use by gij. Routines are provided to emulate the raw API |
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42 | if the underlying platform doesn't allow faster implementation. |
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43 | |
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44 | More details on the raw and cloure API can be found in: |
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45 | |
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46 | http://gcc.gnu.org/ml/java/1999-q3/msg00138.html |
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47 | |
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48 | and |
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49 | |
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50 | http://gcc.gnu.org/ml/java/1999-q3/msg00174.html |
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51 | -------------------------------------------------------------------- */ |
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52 | |
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53 | #ifndef LIBFFI_H |
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54 | #define LIBFFI_H |
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55 | |
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56 | #ifdef __cplusplus |
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57 | extern "C" { |
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58 | #endif |
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59 | |
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60 | /* Specify which architecture libffi is configured for. */ |
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61 | #if (defined(__ppc__) || defined(__ppc64__)) |
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62 | #ifndef POWERPC_DARWIN |
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63 | #define POWERPC_DARWIN |
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64 | #else |
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65 | #ifndef X86_DARWIN |
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66 | #define X86_DARWIN |
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67 | #endif |
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68 | #endif |
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69 | |
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70 | /* ---- System configuration information --------------------------------- */ |
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71 | |
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72 | #include <ffitarget.h> |
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73 | |
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74 | #ifndef LIBFFI_ASM |
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75 | |
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76 | #ifdef _MSC_VER |
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77 | #define __attribute__(X) |
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78 | #endif |
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79 | |
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80 | #include <stddef.h> |
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81 | #include <limits.h> |
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82 | |
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83 | /* LONG_LONG_MAX is not always defined (not if STRICT_ANSI, for example). |
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84 | But we can find it either under the correct ANSI name, or under GNU |
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85 | C's internal name. */ |
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86 | |
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87 | #define FFI_64_BIT_MAX 9223372036854775807 |
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88 | |
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89 | #ifdef LONG_LONG_MAX |
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90 | # define FFI_LONG_LONG_MAX LONG_LONG_MAX |
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91 | #else |
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92 | # ifdef LLONG_MAX |
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93 | # define FFI_LONG_LONG_MAX LLONG_MAX |
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94 | # ifdef _AIX52 /* or newer has C99 LLONG_MAX */ |
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95 | # undef FFI_64_BIT_MAX |
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96 | # define FFI_64_BIT_MAX 9223372036854775807LL |
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97 | # endif /* _AIX52 or newer */ |
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98 | # else |
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99 | # ifdef __GNUC__ |
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100 | # define FFI_LONG_LONG_MAX __LONG_LONG_MAX__ |
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101 | # endif |
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102 | # ifdef _AIX /* AIX 5.1 and earlier have LONGLONG_MAX */ |
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103 | # ifndef __PPC64__ |
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104 | # if defined (__IBMC__) || defined (__IBMCPP__) |
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105 | # define FFI_LONG_LONG_MAX LONGLONG_MAX |
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106 | # endif |
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107 | # endif /* __PPC64__ */ |
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108 | # undef FFI_64_BIT_MAX |
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109 | # define FFI_64_BIT_MAX 9223372036854775807LL |
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110 | # endif |
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111 | # endif |
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112 | #endif |
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113 | |
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114 | /* The closure code assumes that this works on pointers, i.e. a size_t */ |
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115 | /* can hold a pointer. */ |
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116 | |
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117 | typedef struct _ffi_type |
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118 | { |
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119 | size_t size; |
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120 | unsigned short alignment; |
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121 | unsigned short type; |
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122 | struct _ffi_type **elements; |
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123 | } ffi_type; |
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124 | |
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125 | #ifndef LIBFFI_HIDE_BASIC_TYPES |
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126 | #if SCHAR_MAX == 127 |
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127 | # define ffi_type_uchar ffi_type_uint8 |
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128 | # define ffi_type_schar ffi_type_sint8 |
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129 | #else |
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130 | #error "char size not supported" |
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131 | #endif |
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132 | |
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133 | #if SHRT_MAX == 32767 |
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134 | # define ffi_type_ushort ffi_type_uint16 |
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135 | # define ffi_type_sshort ffi_type_sint16 |
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136 | #elif SHRT_MAX == 2147483647 |
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137 | # define ffi_type_ushort ffi_type_uint32 |
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138 | # define ffi_type_sshort ffi_type_sint32 |
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139 | #else |
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140 | #error "short size not supported" |
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141 | #endif |
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142 | |
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143 | #if INT_MAX == 32767 |
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144 | # define ffi_type_uint ffi_type_uint16 |
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145 | # define ffi_type_sint ffi_type_sint16 |
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146 | #elif INT_MAX == 2147483647 |
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147 | # define ffi_type_uint ffi_type_uint32 |
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148 | # define ffi_type_sint ffi_type_sint32 |
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149 | #elif INT_MAX == 9223372036854775807 |
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150 | # define ffi_type_uint ffi_type_uint64 |
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151 | # define ffi_type_sint ffi_type_sint64 |
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152 | #else |
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153 | #error "int size not supported" |
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154 | #endif |
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155 | |
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156 | #if LONG_MAX == 2147483647 |
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157 | # if FFI_LONG_LONG_MAX != FFI_64_BIT_MAX |
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158 | #error "no 64-bit data type supported" |
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159 | # endif |
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160 | #elif LONG_MAX != FFI_64_BIT_MAX |
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161 | #error "long size not supported" |
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162 | #endif |
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163 | |
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164 | #if LONG_MAX == 2147483647 |
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165 | # define ffi_type_ulong ffi_type_uint32 |
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166 | # define ffi_type_slong ffi_type_sint32 |
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167 | #elif LONG_MAX == FFI_64_BIT_MAX |
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168 | # define ffi_type_ulong ffi_type_uint64 |
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169 | # define ffi_type_slong ffi_type_sint64 |
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170 | #else |
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171 | #error "long size not supported" |
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172 | #endif |
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173 | |
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174 | /* These are defined in types.c */ |
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175 | extern ffi_type ffi_type_void; |
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176 | extern ffi_type ffi_type_uint8; |
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177 | extern ffi_type ffi_type_sint8; |
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178 | extern ffi_type ffi_type_uint16; |
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179 | extern ffi_type ffi_type_sint16; |
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180 | extern ffi_type ffi_type_uint32; |
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181 | extern ffi_type ffi_type_sint32; |
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182 | extern ffi_type ffi_type_uint64; |
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183 | extern ffi_type ffi_type_sint64; |
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184 | extern ffi_type ffi_type_float; |
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185 | extern ffi_type ffi_type_double; |
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186 | extern ffi_type ffi_type_pointer; |
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187 | |
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188 | #if 1 |
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189 | extern ffi_type ffi_type_longdouble; |
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190 | #else |
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191 | #define ffi_type_longdouble ffi_type_double |
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192 | #endif |
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193 | #endif /* LIBFFI_HIDE_BASIC_TYPES */ |
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194 | |
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195 | typedef enum { |
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196 | FFI_OK = 0, |
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197 | FFI_BAD_TYPEDEF, |
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198 | FFI_BAD_ABI |
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199 | } ffi_status; |
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200 | |
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201 | typedef unsigned FFI_TYPE; |
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202 | |
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203 | typedef struct { |
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204 | ffi_abi abi; |
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205 | unsigned nargs; |
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206 | ffi_type **arg_types; |
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207 | ffi_type *rtype; |
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208 | unsigned bytes; |
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209 | unsigned flags; |
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210 | #ifdef FFI_EXTRA_CIF_FIELDS |
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211 | FFI_EXTRA_CIF_FIELDS; |
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212 | #endif |
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213 | } ffi_cif; |
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214 | |
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215 | /* ---- Definitions for the raw API -------------------------------------- */ |
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216 | |
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217 | #ifndef FFI_SIZEOF_ARG |
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218 | # if LONG_MAX == 2147483647 |
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219 | # define FFI_SIZEOF_ARG 4 |
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220 | # elif LONG_MAX == FFI_64_BIT_MAX |
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221 | # define FFI_SIZEOF_ARG 8 |
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222 | # endif |
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223 | #endif |
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224 | |
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225 | #ifndef FFI_SIZEOF_JAVA_RAW |
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226 | # define FFI_SIZEOF_JAVA_RAW FFI_SIZEOF_ARG |
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227 | #endif |
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228 | |
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229 | typedef union { |
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230 | ffi_sarg sint; |
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231 | ffi_arg uint; |
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232 | float flt; |
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233 | char data[FFI_SIZEOF_ARG]; |
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234 | void* ptr; |
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235 | } ffi_raw; |
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236 | |
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237 | #if FFI_SIZEOF_JAVA_RAW == 4 && FFI_SIZEOF_ARG == 8 |
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238 | /* This is a special case for mips64/n32 ABI (and perhaps others) where |
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239 | sizeof(void *) is 4 and FFI_SIZEOF_ARG is 8. */ |
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240 | typedef union { |
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241 | signed int sint; |
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242 | unsigned int uint; |
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243 | float flt; |
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244 | char data[FFI_SIZEOF_JAVA_RAW]; |
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245 | void* ptr; |
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246 | } ffi_java_raw; |
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247 | #else |
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248 | typedef ffi_raw ffi_java_raw; |
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249 | #endif |
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250 | |
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251 | |
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252 | void ffi_raw_call (ffi_cif *cif, |
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253 | void (*fn)(void), |
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254 | void *rvalue, |
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255 | ffi_raw *avalue); |
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256 | |
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257 | void ffi_ptrarray_to_raw (ffi_cif *cif, void **args, ffi_raw *raw); |
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258 | void ffi_raw_to_ptrarray (ffi_cif *cif, ffi_raw *raw, void **args); |
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259 | size_t ffi_raw_size (ffi_cif *cif); |
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260 | |
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261 | /* This is analogous to the raw API, except it uses Java parameter */ |
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262 | /* packing, even on 64-bit machines. I.e. on 64-bit machines */ |
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263 | /* longs and doubles are followed by an empty 64-bit word. */ |
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264 | |
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265 | void ffi_java_raw_call (ffi_cif *cif, |
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266 | void (*fn)(void), |
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267 | void *rvalue, |
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268 | ffi_java_raw *avalue); |
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269 | |
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270 | void ffi_java_ptrarray_to_raw (ffi_cif *cif, void **args, ffi_java_raw *raw); |
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271 | void ffi_java_raw_to_ptrarray (ffi_cif *cif, ffi_java_raw *raw, void **args); |
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272 | size_t ffi_java_raw_size (ffi_cif *cif); |
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273 | |
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274 | /* ---- Definitions for closures ----------------------------------------- */ |
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275 | |
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276 | #if FFI_CLOSURES |
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277 | |
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278 | #ifdef _MSC_VER |
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279 | __declspec(align(8)) |
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280 | #endif |
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281 | typedef struct { |
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282 | char tramp[FFI_TRAMPOLINE_SIZE]; |
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283 | ffi_cif *cif; |
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284 | void (*fun)(ffi_cif*,void*,void**,void*); |
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285 | void *user_data; |
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286 | #ifdef __GNUC__ |
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287 | } ffi_closure __attribute__((aligned (8))); |
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288 | #else |
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289 | } ffi_closure; |
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290 | # ifdef __sgi |
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291 | # pragma pack 0 |
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292 | # endif |
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293 | #endif |
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294 | |
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295 | void *ffi_closure_alloc (size_t size, void **code); |
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296 | void ffi_closure_free (void *); |
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297 | |
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298 | ffi_status |
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299 | ffi_prep_closure (ffi_closure*, |
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300 | ffi_cif *, |
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301 | void (*fun)(ffi_cif*,void*,void**,void*), |
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302 | void *user_data); |
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303 | |
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304 | ffi_status |
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305 | ffi_prep_closure_loc (ffi_closure*, |
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306 | ffi_cif *, |
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307 | void (*fun)(ffi_cif*,void*,void**,void*), |
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308 | void *user_data, |
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309 | void*codeloc); |
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310 | |
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311 | #ifdef __sgi |
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312 | # pragma pack 8 |
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313 | #endif |
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314 | typedef struct { |
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315 | char tramp[FFI_TRAMPOLINE_SIZE]; |
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316 | |
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317 | ffi_cif *cif; |
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318 | |
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319 | #if !FFI_NATIVE_RAW_API |
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320 | |
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321 | /* if this is enabled, then a raw closure has the same layout |
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322 | as a regular closure. We use this to install an intermediate |
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323 | handler to do the transaltion, void** -> ffi_raw*. */ |
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324 | |
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325 | void (*translate_args)(ffi_cif*,void*,void**,void*); |
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326 | void *this_closure; |
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327 | |
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328 | #endif |
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329 | |
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330 | void (*fun)(ffi_cif*,void*,ffi_raw*,void*); |
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331 | void *user_data; |
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332 | |
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333 | } ffi_raw_closure; |
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334 | |
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335 | typedef struct { |
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336 | char tramp[FFI_TRAMPOLINE_SIZE]; |
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337 | |
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338 | ffi_cif *cif; |
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339 | |
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340 | #if !FFI_NATIVE_RAW_API |
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341 | |
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342 | /* if this is enabled, then a raw closure has the same layout |
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343 | as a regular closure. We use this to install an intermediate |
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344 | handler to do the transaltion, void** -> ffi_raw*. */ |
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345 | |
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346 | void (*translate_args)(ffi_cif*,void*,void**,void*); |
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347 | void *this_closure; |
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348 | |
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349 | #endif |
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350 | |
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351 | void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*); |
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352 | void *user_data; |
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353 | |
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354 | } ffi_java_raw_closure; |
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355 | |
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356 | ffi_status |
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357 | ffi_prep_raw_closure (ffi_raw_closure*, |
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358 | ffi_cif *cif, |
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359 | void (*fun)(ffi_cif*,void*,ffi_raw*,void*), |
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360 | void *user_data); |
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361 | |
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362 | ffi_status |
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363 | ffi_prep_raw_closure_loc (ffi_raw_closure*, |
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364 | ffi_cif *cif, |
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365 | void (*fun)(ffi_cif*,void*,ffi_raw*,void*), |
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366 | void *user_data, |
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367 | void *codeloc); |
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368 | |
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369 | ffi_status |
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370 | ffi_prep_java_raw_closure (ffi_java_raw_closure*, |
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371 | ffi_cif *cif, |
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372 | void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*), |
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373 | void *user_data); |
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374 | |
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375 | ffi_status |
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376 | ffi_prep_java_raw_closure_loc (ffi_java_raw_closure*, |
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377 | ffi_cif *cif, |
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378 | void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*), |
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379 | void *user_data, |
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380 | void *codeloc); |
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381 | |
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382 | #endif /* FFI_CLOSURES */ |
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383 | |
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384 | /* ---- Public interface definition -------------------------------------- */ |
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385 | |
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386 | ffi_status ffi_prep_cif(ffi_cif *cif, |
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387 | ffi_abi abi, |
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388 | unsigned int nargs, |
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389 | ffi_type *rtype, |
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390 | ffi_type **atypes); |
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391 | |
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392 | void ffi_call(ffi_cif *cif, |
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393 | void (*fn)(void), |
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394 | void *rvalue, |
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395 | void **avalue); |
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396 | |
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397 | /* Useful for eliminating compiler warnings */ |
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398 | #define FFI_FN(f) ((void (*)(void))f) |
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399 | |
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400 | /* ---- Definitions shared with assembly code ---------------------------- */ |
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401 | |
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402 | #endif |
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403 | |
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404 | /* If these change, update src/mips/ffitarget.h. */ |
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405 | #define FFI_TYPE_VOID 0 |
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406 | #define FFI_TYPE_INT 1 |
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407 | #define FFI_TYPE_FLOAT 2 |
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408 | #define FFI_TYPE_DOUBLE 3 |
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409 | #if 1 |
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410 | #define FFI_TYPE_LONGDOUBLE 4 |
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411 | #else |
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412 | #define FFI_TYPE_LONGDOUBLE FFI_TYPE_DOUBLE |
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413 | #endif |
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414 | #define FFI_TYPE_UINT8 5 |
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415 | #define FFI_TYPE_SINT8 6 |
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416 | #define FFI_TYPE_UINT16 7 |
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417 | #define FFI_TYPE_SINT16 8 |
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418 | #define FFI_TYPE_UINT32 9 |
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419 | #define FFI_TYPE_SINT32 10 |
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420 | #define FFI_TYPE_UINT64 11 |
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421 | #define FFI_TYPE_SINT64 12 |
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422 | #define FFI_TYPE_STRUCT 13 |
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423 | #define FFI_TYPE_POINTER 14 |
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424 | |
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425 | /* This should always refer to the last type code (for sanity checks) */ |
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426 | #define FFI_TYPE_LAST FFI_TYPE_POINTER |
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427 | |
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428 | #ifdef __cplusplus |
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429 | } |
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430 | #endif |
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431 | |
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432 | #endif |
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