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Rev | Author | Line No. | Line |
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4349 | Serge | 1 | /* |
2 | * Copyright (c) 1990 The Regents of the University of California. |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms are permitted |
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6 | * provided that the above copyright notice and this paragraph are |
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7 | * duplicated in all such forms and that any documentation, |
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8 | * advertising materials, and other materials related to such |
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9 | * distribution and use acknowledge that the software was developed |
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10 | * by the University of California, Berkeley. The name of the |
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11 | * University may not be used to endorse or promote products derived |
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12 | * from this software without specific prior written permission. |
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13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
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14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
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15 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
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16 | */ |
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17 | /* No user fns here. Pesch 15apr92. */ |
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18 | |||
19 | #include <_ansi.h> |
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20 | #include |
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21 | #include |
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22 | #include |
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23 | #include |
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24 | #include |
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25 | #include |
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26 | #include |
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27 | #include "local.h" |
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28 | |||
29 | #ifdef _REENT_SMALL |
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30 | const struct __sFILE_fake __sf_fake_stdin = |
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31 | {_NULL, 0, 0, 0, 0, {_NULL, 0}, 0, _NULL}; |
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32 | const struct __sFILE_fake __sf_fake_stdout = |
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33 | {_NULL, 0, 0, 0, 0, {_NULL, 0}, 0, _NULL}; |
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34 | const struct __sFILE_fake __sf_fake_stderr = |
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35 | {_NULL, 0, 0, 0, 0, {_NULL, 0}, 0, _NULL}; |
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36 | #endif |
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37 | |||
6099 | serge | 38 | #if (defined (__OPTIMIZE_SIZE__) || defined (PREFER_SIZE_OVER_SPEED)) |
39 | _NOINLINE_STATIC _VOID |
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40 | #else |
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4349 | Serge | 41 | static _VOID |
6099 | serge | 42 | #endif |
4349 | Serge | 43 | _DEFUN(std, (ptr, flags, file, data), |
44 | FILE *ptr _AND |
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45 | int flags _AND |
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46 | int file _AND |
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47 | struct _reent *data) |
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48 | { |
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49 | ptr->_p = 0; |
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50 | ptr->_r = 0; |
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51 | ptr->_w = 0; |
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52 | ptr->_flags = flags; |
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53 | ptr->_flags2 = 0; |
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54 | ptr->_file = file; |
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55 | ptr->_bf._base = 0; |
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56 | ptr->_bf._size = 0; |
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57 | ptr->_lbfsize = 0; |
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58 | memset (&ptr->_mbstate, 0, sizeof (_mbstate_t)); |
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59 | ptr->_cookie = ptr; |
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60 | ptr->_read = __sread; |
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61 | #ifndef __LARGE64_FILES |
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62 | ptr->_write = __swrite; |
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63 | #else /* __LARGE64_FILES */ |
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64 | ptr->_write = __swrite64; |
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65 | ptr->_seek64 = __sseek64; |
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66 | ptr->_flags |= __SL64; |
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67 | #endif /* __LARGE64_FILES */ |
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68 | ptr->_seek = __sseek; |
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4921 | Serge | 69 | #ifdef _STDIO_CLOSE_PER_REENT_STD_STREAMS |
4349 | Serge | 70 | ptr->_close = __sclose; |
4921 | Serge | 71 | #else /* _STDIO_CLOSE_STD_STREAMS */ |
72 | ptr->_close = NULL; |
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73 | #endif /* _STDIO_CLOSE_STD_STREAMS */ |
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4349 | Serge | 74 | #if !defined(__SINGLE_THREAD__) && !defined(_REENT_SMALL) |
75 | __lock_init_recursive (ptr->_lock); |
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76 | /* |
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77 | * #else |
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78 | * lock is already initialized in __sfp |
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79 | */ |
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80 | #endif |
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81 | |||
82 | #ifdef __SCLE |
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83 | if (__stextmode (ptr->_file)) |
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84 | ptr->_flags |= __SCLE; |
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85 | #endif |
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86 | } |
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87 | |||
4921 | Serge | 88 | struct glue_with_file { |
89 | struct _glue glue; |
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90 | FILE file; |
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91 | }; |
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92 | |||
4349 | Serge | 93 | struct _glue * |
94 | _DEFUN(__sfmoreglue, (d, n), |
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95 | struct _reent *d _AND |
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96 | register int n) |
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97 | { |
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4921 | Serge | 98 | struct glue_with_file *g; |
4349 | Serge | 99 | |
4921 | Serge | 100 | g = (struct glue_with_file *) |
101 | _malloc_r (d, sizeof (*g) + (n - 1) * sizeof (FILE)); |
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4349 | Serge | 102 | if (g == NULL) |
103 | return NULL; |
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4921 | Serge | 104 | g->glue._next = NULL; |
105 | g->glue._niobs = n; |
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106 | g->glue._iobs = &g->file; |
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107 | memset (&g->file, 0, n * sizeof (FILE)); |
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108 | return &g->glue; |
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4349 | Serge | 109 | } |
110 | |||
111 | /* |
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112 | * Find a free FILE for fopen et al. |
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113 | */ |
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114 | |||
115 | FILE * |
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116 | _DEFUN(__sfp, (d), |
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117 | struct _reent *d) |
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118 | { |
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119 | FILE *fp; |
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120 | int n; |
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121 | struct _glue *g; |
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122 | |||
4921 | Serge | 123 | _newlib_sfp_lock_start (); |
4349 | Serge | 124 | |
125 | if (!_GLOBAL_REENT->__sdidinit) |
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126 | __sinit (_GLOBAL_REENT); |
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127 | for (g = &_GLOBAL_REENT->__sglue;; g = g->_next) |
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128 | { |
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129 | for (fp = g->_iobs, n = g->_niobs; --n >= 0; fp++) |
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130 | if (fp->_flags == 0) |
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131 | goto found; |
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132 | if (g->_next == NULL && |
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133 | (g->_next = __sfmoreglue (d, NDYNAMIC)) == NULL) |
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134 | break; |
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135 | } |
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4921 | Serge | 136 | _newlib_sfp_lock_exit (); |
4349 | Serge | 137 | d->_errno = ENOMEM; |
138 | return NULL; |
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139 | |||
140 | found: |
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141 | fp->_file = -1; /* no file */ |
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142 | fp->_flags = 1; /* reserve this slot; caller sets real flags */ |
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143 | fp->_flags2 = 0; |
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144 | #ifndef __SINGLE_THREAD__ |
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145 | __lock_init_recursive (fp->_lock); |
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146 | #endif |
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4921 | Serge | 147 | _newlib_sfp_lock_end (); |
4349 | Serge | 148 | |
149 | fp->_p = NULL; /* no current pointer */ |
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150 | fp->_w = 0; /* nothing to read or write */ |
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151 | fp->_r = 0; |
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152 | fp->_bf._base = NULL; /* no buffer */ |
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153 | fp->_bf._size = 0; |
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154 | fp->_lbfsize = 0; /* not line buffered */ |
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155 | memset (&fp->_mbstate, 0, sizeof (_mbstate_t)); |
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156 | /* fp->_cookie = |
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157 | fp->_ub._base = NULL; /* no ungetc buffer */ |
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158 | fp->_ub._size = 0; |
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159 | fp->_lb._base = NULL; /* no line buffer */ |
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160 | fp->_lb._size = 0; |
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161 | |||
162 | return fp; |
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163 | } |
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164 | |||
165 | /* |
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166 | * exit() calls _cleanup() through *__cleanup, set whenever we |
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167 | * open or buffer a file. This chicanery is done so that programs |
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168 | * that do not use stdio need not link it all in. |
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169 | * |
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170 | * The name `_cleanup' is, alas, fairly well known outside stdio. |
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171 | */ |
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172 | |||
173 | _VOID |
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174 | _DEFUN(_cleanup_r, (ptr), |
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175 | struct _reent *ptr) |
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176 | { |
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6099 | serge | 177 | int (*cleanup_func) (struct _reent *, FILE *); |
178 | #ifdef _STDIO_BSD_SEMANTICS |
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179 | /* BSD and Glibc systems only flush streams which have been written to |
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180 | at exit time. Calling flush rather than close for speed, as on |
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181 | the aforementioned systems. */ |
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182 | cleanup_func = __sflushw_r; |
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183 | #else |
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184 | /* Otherwise close files and flush read streams, too. |
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185 | Note we call flush directly if "--enable-lite-exit" is in effect. */ |
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186 | #ifdef _LITE_EXIT |
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187 | cleanup_func = _fflush_r; |
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188 | #else |
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189 | cleanup_func = _fclose_r; |
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190 | #endif |
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191 | #endif |
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192 | _CAST_VOID _fwalk_reent (ptr, cleanup_func); |
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4349 | Serge | 193 | } |
194 | |||
195 | #ifndef _REENT_ONLY |
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196 | _VOID |
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197 | _DEFUN_VOID(_cleanup) |
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198 | { |
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199 | _cleanup_r (_GLOBAL_REENT); |
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200 | } |
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201 | #endif |
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202 | |||
203 | /* |
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204 | * __sinit() is called whenever stdio's internal variables must be set up. |
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205 | */ |
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206 | |||
207 | _VOID |
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208 | _DEFUN(__sinit, (s), |
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209 | struct _reent *s) |
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210 | { |
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211 | __sinit_lock_acquire (); |
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212 | |||
213 | if (s->__sdidinit) |
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214 | { |
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215 | __sinit_lock_release (); |
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216 | return; |
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217 | } |
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218 | |||
219 | /* make sure we clean up on exit */ |
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220 | s->__cleanup = _cleanup_r; /* conservative */ |
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221 | |||
222 | s->__sglue._next = NULL; |
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223 | #ifndef _REENT_SMALL |
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224 | s->__sglue._niobs = 3; |
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225 | s->__sglue._iobs = &s->__sf[0]; |
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226 | #else |
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227 | s->__sglue._niobs = 0; |
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228 | s->__sglue._iobs = NULL; |
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4921 | Serge | 229 | /* Avoid infinite recursion when calling __sfp for _GLOBAL_REENT. The |
230 | problem is that __sfp checks for _GLOBAL_REENT->__sdidinit and calls |
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231 | __sinit if it's 0. */ |
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232 | if (s == _GLOBAL_REENT) |
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233 | s->__sdidinit = 1; |
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4349 | Serge | 234 | s->_stdin = __sfp(s); |
235 | s->_stdout = __sfp(s); |
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236 | s->_stderr = __sfp(s); |
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237 | #endif |
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238 | |||
239 | std (s->_stdin, __SRD, 0, s); |
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240 | |||
241 | /* On platforms that have true file system I/O, we can verify |
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242 | whether stdout is an interactive terminal or not, as part of |
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243 | __smakebuf on first use of the stream. For all other platforms, |
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244 | we will default to line buffered mode here. Technically, POSIX |
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245 | requires both stdin and stdout to be line-buffered, but tradition |
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246 | leaves stdin alone on systems without fcntl. */ |
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247 | #ifdef HAVE_FCNTL |
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248 | std (s->_stdout, __SWR, 1, s); |
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249 | #else |
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250 | std (s->_stdout, __SWR | __SLBF, 1, s); |
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251 | #endif |
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252 | |||
253 | /* POSIX requires stderr to be opened for reading and writing, even |
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254 | when the underlying fd 2 is write-only. */ |
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255 | std (s->_stderr, __SRW | __SNBF, 2, s); |
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256 | |||
4921 | Serge | 257 | s->__sdidinit = 1; |
258 | |||
4349 | Serge | 259 | __sinit_lock_release (); |
260 | } |
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261 | |||
262 | #ifndef __SINGLE_THREAD__ |
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263 | |||
264 | __LOCK_INIT_RECURSIVE(static, __sfp_lock); |
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265 | __LOCK_INIT_RECURSIVE(static, __sinit_lock); |
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266 | |||
267 | _VOID |
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268 | _DEFUN_VOID(__sfp_lock_acquire) |
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269 | { |
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6536 | serge | 270 | __lock_acquire_recursive (__sfp_lock); |
4349 | Serge | 271 | } |
272 | |||
273 | _VOID |
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274 | _DEFUN_VOID(__sfp_lock_release) |
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275 | { |
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6536 | serge | 276 | __lock_release_recursive (__sfp_lock); |
4349 | Serge | 277 | } |
278 | |||
279 | _VOID |
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280 | _DEFUN_VOID(__sinit_lock_acquire) |
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281 | { |
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6536 | serge | 282 | __lock_acquire_recursive (__sinit_lock); |
4349 | Serge | 283 | } |
284 | |||
285 | _VOID |
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286 | _DEFUN_VOID(__sinit_lock_release) |
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287 | { |
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6536 | serge | 288 | __lock_release_recursive (__sinit_lock); |
4349 | Serge | 289 | } |
290 | |||
291 | /* Walkable file locking routine. */ |
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292 | static int |
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293 | _DEFUN(__fp_lock, (ptr), |
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294 | FILE * ptr) |
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295 | { |
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6099 | serge | 296 | if (!(ptr->_flags2 & __SNLK)) |
297 | _flockfile (ptr); |
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4349 | Serge | 298 | |
299 | return 0; |
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300 | } |
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301 | |||
302 | /* Walkable file unlocking routine. */ |
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303 | static int |
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304 | _DEFUN(__fp_unlock, (ptr), |
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305 | FILE * ptr) |
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306 | { |
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6099 | serge | 307 | if (!(ptr->_flags2 & __SNLK)) |
308 | _funlockfile (ptr); |
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4349 | Serge | 309 | |
310 | return 0; |
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311 | } |
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312 | |||
313 | _VOID |
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314 | _DEFUN_VOID(__fp_lock_all) |
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315 | { |
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316 | __sfp_lock_acquire (); |
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317 | |||
318 | _CAST_VOID _fwalk (_REENT, __fp_lock); |
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319 | } |
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320 | |||
321 | _VOID |
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322 | _DEFUN_VOID(__fp_unlock_all) |
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323 | { |
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324 | _CAST_VOID _fwalk (_REENT, __fp_unlock); |
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325 | |||
326 | __sfp_lock_release (); |
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327 | } |
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328 | #endif |