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1 | #define PERL_NO_GET_CONTEXT |
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2 | |
1 | #include "EXTERN.h" |
3 | #include "EXTERN.h" |
2 | #include "perl.h" |
4 | #include "perl.h" |
3 | #include "XSUB.h" |
5 | #include "XSUB.h" |
4 | |
6 | |
5 | #include <sys/types.h> |
7 | #include <sys/types.h> |
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8 | #include <sys/stat.h> |
6 | #include <unistd.h> |
9 | #include <unistd.h> |
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10 | #include <fcntl.h> |
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11 | #include <signal.h> |
7 | #include <sched.h> |
12 | #include <sched.h> |
8 | |
13 | |
9 | #define STACKSIZE 128 /* yeah */ |
14 | typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
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15 | typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
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16 | typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
10 | |
17 | |
11 | #define REQ_EXIT 0 |
18 | // 128 seems to be enough most everywhere. alpha needs 256. |
12 | #define REQ_READ 1 |
19 | #define STACKSIZE (256 * sizeof (long)) |
13 | #define REQ_WRITE 2 |
20 | |
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21 | enum { |
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22 | REQ_QUIT, |
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23 | REQ_OPEN, REQ_CLOSE, REQ_READ, REQ_WRITE, |
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24 | REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK |
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25 | }; |
14 | |
26 | |
15 | typedef struct { |
27 | typedef struct { |
16 | char stack[STACKSIZE]; |
28 | char stack[STACKSIZE]; |
17 | } aio_thread; |
29 | } aio_thread; |
18 | |
30 | |
19 | typedef struct { |
31 | typedef struct aio_cb { |
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32 | struct aio_cb *next; |
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33 | |
20 | int type; |
34 | int type; |
21 | aio_thread *thread; |
35 | aio_thread *thread; |
22 | |
36 | |
23 | /* read/write */ |
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24 | int fd; |
37 | int fd; |
25 | off_t offset; |
38 | off_t offset; |
26 | size_t length; |
39 | size_t length; |
27 | ssize_t done; |
40 | ssize_t result; |
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41 | mode_t mode; /* open */ |
28 | int errorno; |
42 | int errorno; |
29 | |
43 | SV *data, *callback; |
30 | SV *data; |
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31 | void *dataptr; |
44 | void *dataptr; |
32 | STRLEN offset; |
45 | STRLEN dataoffset; |
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46 | |
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47 | Stat_t *statdata; |
33 | } aio_cb; |
48 | } aio_cb; |
34 | |
49 | |
35 | typedef aio_cb *aio_req; |
50 | typedef aio_cb *aio_req; |
36 | |
51 | |
37 | static int started; |
52 | static int started; |
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53 | static int nreqs; |
38 | static int reqpipe[2], respipe[2]; |
54 | static int reqpipe[2], respipe[2]; |
39 | |
55 | |
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56 | static aio_req qs, qe; /* queue start, queue end */ |
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57 | |
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58 | static int aio_proc(void *arg); |
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59 | |
40 | static void |
60 | static void |
41 | start_thread(void) |
61 | start_thread (void) |
42 | { |
62 | { |
43 | aio_thread *thr = NEW ( |
63 | aio_thread *thr; |
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64 | |
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65 | New (0, thr, 1, aio_thread); |
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66 | |
44 | __clone (aio_proc, |
67 | if (clone (aio_proc, |
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68 | &(thr->stack[STACKSIZE - sizeof (long)]), |
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69 | CLONE_VM|CLONE_FS|CLONE_FILES, |
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70 | thr) >= 0) |
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71 | started++; |
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72 | else |
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73 | Safefree (thr); |
45 | } |
74 | } |
46 | |
75 | |
47 | static void |
76 | static void |
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77 | send_reqs (void) |
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78 | { |
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79 | /* this write is atomic */ |
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80 | while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs) |
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81 | { |
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82 | qs = qs->next; |
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83 | if (!qs) qe = 0; |
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84 | } |
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85 | } |
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86 | |
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87 | static void |
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88 | send_req (aio_req req) |
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89 | { |
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90 | nreqs++; |
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91 | req->next = 0; |
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92 | |
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93 | if (qe) |
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94 | { |
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95 | qe->next = req; |
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96 | qe = req; |
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97 | } |
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98 | else |
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99 | qe = qs = req; |
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100 | |
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101 | send_reqs (); |
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102 | } |
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103 | |
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104 | static void |
48 | end_thread(void) |
105 | end_thread (void) |
49 | { |
106 | { |
50 | aio_req req = 0; |
107 | aio_req req; |
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108 | New (0, req, 1, aio_cb); |
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109 | req->type = REQ_QUIT; |
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110 | |
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111 | send_req (req); |
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112 | } |
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113 | |
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114 | static void |
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115 | read_write (pTHX_ |
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116 | int dowrite, int fd, off_t offset, size_t length, |
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117 | SV *data, STRLEN dataoffset, SV *callback) |
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118 | { |
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119 | aio_req req; |
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120 | STRLEN svlen; |
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121 | char *svptr = SvPV (data, svlen); |
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122 | |
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123 | SvUPGRADE (data, SVt_PV); |
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124 | SvPOK_on (data); |
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125 | |
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126 | if (dataoffset < 0) |
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127 | dataoffset += svlen; |
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128 | |
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129 | if (dataoffset < 0 || dataoffset > svlen) |
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130 | croak ("data offset outside of string"); |
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131 | |
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132 | if (dowrite) |
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133 | { |
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134 | /* write: check length and adjust. */ |
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135 | if (length < 0 || length + dataoffset > svlen) |
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136 | length = svlen - dataoffset; |
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137 | } |
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138 | else |
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139 | { |
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140 | /* read: grow scalar as necessary */ |
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141 | svptr = SvGROW (data, length + dataoffset); |
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142 | } |
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143 | |
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144 | if (length < 0) |
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145 | croak ("length must not be negative"); |
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146 | |
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147 | Newz (0, req, 1, aio_cb); |
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148 | |
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149 | if (!req) |
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150 | croak ("out of memory during aio_req allocation"); |
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151 | |
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152 | req->type = dowrite ? REQ_WRITE : REQ_READ; |
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153 | req->fd = fd; |
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154 | req->offset = offset; |
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155 | req->length = length; |
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156 | req->data = SvREFCNT_inc (data); |
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157 | req->dataptr = (char *)svptr + dataoffset; |
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158 | req->callback = SvREFCNT_inc (callback); |
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159 | |
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160 | send_req (req); |
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161 | } |
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162 | |
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163 | static void |
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164 | poll_wait () |
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165 | { |
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166 | fd_set rfd; |
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167 | FD_ZERO(&rfd); |
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168 | FD_SET(respipe[0], &rfd); |
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169 | |
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170 | select (respipe[0] + 1, &rfd, 0, 0, 0); |
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171 | } |
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172 | |
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173 | static int |
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174 | poll_cb (pTHX) |
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175 | { |
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176 | dSP; |
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177 | int count = 0; |
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178 | aio_req req; |
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179 | |
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180 | while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req)) |
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181 | { |
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182 | nreqs--; |
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183 | |
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184 | if (req->type == REQ_QUIT) |
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185 | { |
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186 | Safefree (req->thread); |
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187 | started--; |
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188 | } |
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189 | else |
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190 | { |
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191 | int errorno = errno; |
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192 | errno = req->errorno; |
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193 | |
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194 | if (req->type == REQ_READ) |
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195 | SvCUR_set (req->data, req->dataoffset |
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196 | + req->result > 0 ? req->result : 0); |
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197 | |
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198 | if (req->data) |
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199 | SvREFCNT_dec (req->data); |
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200 | |
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201 | if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT) |
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202 | { |
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203 | PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; |
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204 | PL_laststatval = req->result; |
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205 | PL_statcache = *(req->statdata); |
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206 | |
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207 | Safefree (req->statdata); |
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208 | } |
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209 | |
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210 | PUSHMARK (SP); |
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211 | XPUSHs (sv_2mortal (newSViv (req->result))); |
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212 | PUTBACK; |
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213 | call_sv (req->callback, G_VOID); |
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214 | SPAGAIN; |
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215 | |
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216 | if (req->callback) |
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217 | SvREFCNT_dec (req->callback); |
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218 | |
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219 | errno = errorno; |
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220 | count++; |
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221 | } |
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222 | |
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223 | Safefree (req); |
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224 | } |
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225 | |
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226 | if (qs) |
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227 | send_reqs (); |
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228 | |
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229 | return count; |
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230 | } |
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231 | |
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232 | static sigset_t fullsigset; |
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233 | |
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234 | #undef errno |
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235 | #include <asm/unistd.h> |
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236 | #include <sys/prctl.h> |
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237 | |
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238 | #if __alpha || __ia64 || __hppa || __sparc64__ || __v850__ |
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239 | # define stat kernelstat |
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240 | # define stat64 kernelstat64 |
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241 | # include <asm/stat.h> |
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242 | # undef stat |
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243 | # undef stat64 |
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244 | #else |
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245 | # define kernelstat stat |
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246 | # define kernelstat64 stat64 |
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247 | #endif |
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248 | |
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249 | #define COPY_STATDATA \ |
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250 | req->statdata->st_dev = statdata.st_dev; \ |
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251 | req->statdata->st_ino = statdata.st_ino; \ |
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252 | req->statdata->st_mode = statdata.st_mode; \ |
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253 | req->statdata->st_nlink = statdata.st_nlink; \ |
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254 | req->statdata->st_uid = statdata.st_uid; \ |
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255 | req->statdata->st_gid = statdata.st_gid; \ |
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256 | req->statdata->st_rdev = statdata.st_rdev; \ |
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257 | req->statdata->st_size = statdata.st_size; \ |
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258 | req->statdata->st_atime = statdata.st_atime; \ |
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259 | req->statdata->st_mtime = statdata.st_mtime; \ |
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260 | req->statdata->st_ctime = statdata.st_ctime; \ |
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261 | req->statdata->st_blksize = statdata.st_blksize; \ |
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262 | req->statdata->st_blocks = statdata.st_blocks; \ |
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263 | |
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264 | static int |
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265 | aio_proc (void *thr_arg) |
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266 | { |
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267 | aio_thread *thr = thr_arg; |
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268 | aio_req req; |
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269 | int errno; |
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270 | |
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271 | /* this is very much kernel-specific :(:(:( */ |
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272 | /* we rely on gcc's ability to create closures. */ |
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273 | _syscall3(int,read,int,fd,char *,buf,size_t,count) |
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274 | _syscall3(int,write,int,fd,char *,buf,size_t,count) |
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275 | |
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276 | _syscall3(int,open,char *,pathname,int,flags,mode_t,mode) |
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277 | _syscall1(int,close,int,fd) |
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278 | |
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279 | #if __NR_pread64 |
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280 | _syscall5(int,pread64,int,fd,char *,buf,size_t,count,unsigned int,offset_lo,unsigned int,offset_hi) |
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281 | _syscall5(int,pwrite64,int,fd,char *,buf,size_t,count,unsigned int,offset_lo,unsigned int,offset_hi) |
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282 | #elif __NR_pread |
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283 | _syscall4(int,pread,int,fd,char *,buf,size_t,count,offset_t,offset) |
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284 | _syscall4(int,pwrite,int,fd,char *,buf,size_t,count,offset_t,offset) |
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285 | #else |
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286 | # error "neither pread nor pread64 defined" |
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287 | #endif |
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288 | |
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289 | |
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290 | #if __NR_stat64 |
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291 | _syscall2(int,stat64, const char *, filename, struct kernelstat64 *, buf) |
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292 | _syscall2(int,lstat64, const char *, filename, struct kernelstat64 *, buf) |
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293 | _syscall2(int,fstat64, int, fd, struct kernelstat64 *, buf) |
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294 | #elif __NR_stat |
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295 | _syscall2(int,stat, const char *, filename, struct kernelstat *, buf) |
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296 | _syscall2(int,lstat, const char *, filename, struct kernelstat *, buf) |
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297 | _syscall2(int,fstat, int, fd, struct kernelstat *, buf) |
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298 | #else |
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299 | # error "neither stat64 nor stat defined" |
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300 | #endif |
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301 | |
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302 | _syscall1(int,unlink, char *, filename); |
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303 | |
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304 | sigprocmask (SIG_SETMASK, &fullsigset, 0); |
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305 | prctl (PR_SET_PDEATHSIG, SIGKILL); |
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306 | |
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307 | /* then loop */ |
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308 | while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req)) |
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309 | { |
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310 | req->thread = thr; |
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311 | errno = 0; /* strictly unnecessary */ |
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312 | |
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313 | switch (req->type) |
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314 | { |
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315 | #if __NR_pread64 |
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316 | case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset & 0xffffffff, req->offset >> 32); break; |
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317 | case REQ_WRITE: req->result = pwrite64(req->fd, req->dataptr, req->length, req->offset & 0xffffffff, req->offset >> 32); break; |
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318 | #else |
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319 | case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; |
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320 | case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; |
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321 | #endif |
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322 | #if __NR_stat64 |
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323 | struct kernelstat64 statdata; |
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324 | case REQ_STAT: req->result = stat64 (req->dataptr, &statdata); COPY_STATDATA; break; |
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325 | case REQ_LSTAT: req->result = lstat64 (req->dataptr, &statdata); COPY_STATDATA; break; |
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326 | case REQ_FSTAT: req->result = fstat64 (req->fd, &statdata); COPY_STATDATA; break; |
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327 | #else |
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328 | struct kernelstat statdata; |
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329 | case REQ_STAT: req->result = stat (req->dataptr, &statdata); COPY_STATDATA; break; |
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330 | case REQ_LSTAT: req->result = lstat (req->dataptr, &statdata); COPY_STATDATA; break; |
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331 | case REQ_FSTAT: req->result = fstat (req->fd, &statdata); COPY_STATDATA; break; |
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332 | #endif |
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333 | case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; |
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334 | case REQ_CLOSE: req->result = close (req->fd); break; |
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335 | case REQ_UNLINK: req->result = unlink (req->dataptr); break; |
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336 | |
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337 | case REQ_QUIT: |
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338 | default: |
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339 | write (respipe[1], (void *)&req, sizeof (req)); |
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340 | return 0; |
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341 | } |
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342 | |
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343 | req->errorno = errno; |
51 | write (reqpipe[1], &req, sizeof (aio_req)); |
344 | write (respipe[1], (void *)&req, sizeof (req)); |
52 | nthreads--; |
345 | } |
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346 | |
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347 | return 0; |
53 | } |
348 | } |
54 | |
349 | |
55 | MODULE = Linux::AIO PACKAGE = Linux::AIO |
350 | MODULE = Linux::AIO PACKAGE = Linux::AIO |
56 | |
351 | |
57 | BOOT: |
352 | BOOT: |
58 | { |
353 | { |
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354 | sigfillset (&fullsigset); |
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355 | sigdelset (&fullsigset, SIGTERM); |
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356 | sigdelset (&fullsigset, SIGQUIT); |
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357 | sigdelset (&fullsigset, SIGABRT); |
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358 | sigdelset (&fullsigset, SIGINT); |
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359 | |
59 | if (pipe (reqpipe) || pipe (respipe)) |
360 | if (pipe (reqpipe) || pipe (respipe)) |
60 | croak ("unable to initialize request or result pipe"); |
361 | croak ("unable to initialize request or result pipe"); |
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362 | |
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363 | if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK)) |
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364 | croak ("cannot set result pipe to nonblocking mode"); |
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365 | |
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366 | if (fcntl (respipe[0], F_SETFL, O_NONBLOCK)) |
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367 | croak ("cannot set result pipe to nonblocking mode"); |
61 | } |
368 | } |
62 | |
369 | |
63 | void |
370 | void |
64 | min_parallel(nthreads) |
371 | min_parallel(nthreads) |
65 | int nthreads |
372 | int nthreads |
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373 | PROTOTYPE: $ |
66 | CODE: |
374 | CODE: |
67 | while (nthreads > started) |
375 | while (nthreads > started) |
68 | start_thread (); |
376 | start_thread (); |
69 | |
377 | |
70 | void |
378 | void |
71 | max_parallel(nthreads) |
379 | max_parallel(nthreads) |
72 | int nthreads |
380 | int nthreads |
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381 | PROTOTYPE: $ |
73 | CODE: |
382 | CODE: |
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383 | int cur = started; |
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384 | while (cur > nthreads) |
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385 | { |
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386 | end_thread (); |
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387 | cur--; |
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388 | } |
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389 | |
74 | while (started > nthreads) |
390 | while (started > nthreads) |
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391 | { |
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392 | poll_wait (); |
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393 | poll_cb (aTHX); |
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394 | } |
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395 | |
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396 | void |
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397 | aio_open(pathname,flags,mode,callback) |
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398 | SV * pathname |
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399 | int flags |
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400 | int mode |
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401 | SV * callback |
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402 | PROTOTYPE: $$$$ |
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403 | CODE: |
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404 | aio_req req; |
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405 | |
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406 | Newz (0, req, 1, aio_cb); |
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407 | |
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408 | if (!req) |
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409 | croak ("out of memory during aio_req allocation"); |
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410 | |
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411 | req->type = REQ_OPEN; |
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412 | req->data = newSVsv (pathname); |
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413 | req->dataptr = SvPV_nolen (req->data); |
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414 | req->fd = flags; |
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415 | req->mode = mode; |
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416 | req->callback = SvREFCNT_inc (callback); |
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417 | |
75 | end_thread (); |
418 | send_req (req); |
76 | |
419 | |
77 | void |
420 | void |
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421 | aio_close(fh,callback) |
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422 | InputStream fh |
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423 | SV * callback |
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424 | PROTOTYPE: $$ |
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425 | CODE: |
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426 | aio_req req; |
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427 | |
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428 | Newz (0, req, 1, aio_cb); |
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429 | |
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430 | if (!req) |
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431 | croak ("out of memory during aio_req allocation"); |
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432 | |
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433 | req->type = REQ_CLOSE; |
|
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434 | req->fd = PerlIO_fileno (fh); |
|
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435 | req->callback = SvREFCNT_inc (callback); |
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436 | |
|
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437 | send_req (req); |
|
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438 | |
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439 | void |
78 | read(fh,offset,length,data,dataoffset,callback) |
440 | aio_read(fh,offset,length,data,dataoffset,callback) |
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441 | InputStream fh |
|
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442 | UV offset |
|
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443 | IV length |
|
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444 | SV * data |
|
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445 | IV dataoffset |
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446 | SV * callback |
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|
447 | PROTOTYPE: $$$$$$ |
|
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448 | CODE: |
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449 | read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); |
|
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450 | |
|
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451 | void |
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|
452 | aio_write(fh,offset,length,data,dataoffset,callback) |
|
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453 | OutputStream fh |
|
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454 | UV offset |
|
|
455 | IV length |
|
|
456 | SV * data |
|
|
457 | IV dataoffset |
|
|
458 | SV * callback |
|
|
459 | PROTOTYPE: $$$$$$ |
|
|
460 | CODE: |
|
|
461 | read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); |
|
|
462 | |
|
|
463 | void |
|
|
464 | aio_stat(fh_or_path,callback) |
|
|
465 | SV * fh_or_path |
|
|
466 | SV * callback |
|
|
467 | PROTOTYPE: $$ |
|
|
468 | ALIAS: |
|
|
469 | aio_lstat = 1 |
79 | CODE: |
470 | CODE: |
|
|
471 | aio_req req; |
|
|
472 | |
|
|
473 | Newz (0, req, 1, aio_cb); |
|
|
474 | |
|
|
475 | if (!req) |
|
|
476 | croak ("out of memory during aio_req allocation"); |
|
|
477 | |
|
|
478 | New (0, req->statdata, 1, Stat_t); |
|
|
479 | |
|
|
480 | if (!req->statdata) |
|
|
481 | croak ("out of memory during aio_req->statdata allocation"); |
|
|
482 | |
|
|
483 | if (SvPOK (fh_or_path)) |
|
|
484 | { |
|
|
485 | req->type = ix ? REQ_LSTAT : REQ_STAT; |
|
|
486 | req->data = newSVsv (fh_or_path); |
|
|
487 | req->dataptr = SvPV_nolen (req->data); |
|
|
488 | } |
|
|
489 | else |
|
|
490 | { |
|
|
491 | req->type = REQ_FSTAT; |
|
|
492 | req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
|
|
493 | } |
|
|
494 | |
|
|
495 | req->callback = SvREFCNT_inc (callback); |
|
|
496 | |
|
|
497 | send_req (req); |
|
|
498 | |
|
|
499 | void |
|
|
500 | aio_unlink(pathname,callback) |
|
|
501 | SV * pathname |
|
|
502 | SV * callback |
|
|
503 | PROTOTYPE: $$ |
|
|
504 | CODE: |
|
|
505 | aio_req req; |
|
|
506 | |
|
|
507 | Newz (0, req, 1, aio_cb); |
|
|
508 | |
|
|
509 | if (!req) |
|
|
510 | croak ("out of memory during aio_req allocation"); |
|
|
511 | |
|
|
512 | req->type = REQ_UNLINK; |
|
|
513 | req->data = newSVsv (pathname); |
|
|
514 | req->dataptr = SvPV_nolen (req->data); |
|
|
515 | req->callback = SvREFCNT_inc (callback); |
|
|
516 | |
|
|
517 | send_req (req); |
|
|
518 | |
|
|
519 | int |
|
|
520 | poll_fileno() |
|
|
521 | PROTOTYPE: |
|
|
522 | CODE: |
|
|
523 | RETVAL = respipe[0]; |
|
|
524 | OUTPUT: |
|
|
525 | RETVAL |
|
|
526 | |
|
|
527 | int |
|
|
528 | poll_cb(...) |
|
|
529 | PROTOTYPE: |
|
|
530 | CODE: |
|
|
531 | RETVAL = poll_cb (aTHX); |
|
|
532 | OUTPUT: |
|
|
533 | RETVAL |
|
|
534 | |
|
|
535 | void |
|
|
536 | poll_wait() |
|
|
537 | PROTOTYPE: |
|
|
538 | CODE: |
|
|
539 | poll_wait (); |
|
|
540 | |
|
|
541 | int |
|
|
542 | nreqs() |
|
|
543 | PROTOTYPE: |
|
|
544 | CODE: |
|
|
545 | RETVAL = nreqs; |
|
|
546 | OUTPUT: |
|
|
547 | RETVAL |
|
|
548 | |