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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> |
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13 | #include <endian.h> |
8 | |
14 | |
9 | #define STACKSIZE 128 /* yeah */ |
15 | typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
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16 | typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
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17 | typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
10 | |
18 | |
11 | #define REQ_EXIT 0 |
19 | #if __i386 || __amd64 |
12 | #define REQ_READ 1 |
20 | # define STACKSIZE ( 256 * sizeof (long)) |
13 | #define REQ_WRITE 2 |
21 | #elif __ia64 |
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22 | # define STACKSIZE (8192 * sizeof (long)) |
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23 | #else |
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24 | # define STACKSIZE ( 512 * sizeof (long)) |
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25 | #endif |
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26 | |
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27 | enum { |
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28 | REQ_QUIT, |
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29 | REQ_OPEN, REQ_CLOSE, REQ_READ, REQ_WRITE, |
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30 | REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK |
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31 | }; |
14 | |
32 | |
15 | typedef struct { |
33 | typedef struct { |
16 | char stack[STACKSIZE]; |
34 | char stack[STACKSIZE]; |
17 | } aio_thread; |
35 | } aio_thread; |
18 | |
36 | |
19 | typedef struct { |
37 | typedef struct aio_cb { |
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38 | struct aio_cb *next; |
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39 | |
20 | int type; |
40 | int type; |
21 | aio_thread *thread; |
41 | aio_thread *thread; |
22 | |
42 | |
23 | /* read/write */ |
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24 | int fd; |
43 | int fd; |
25 | off_t offset; |
44 | off_t offset; |
26 | size_t length; |
45 | size_t length; |
27 | ssize_t done; |
46 | ssize_t result; |
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47 | mode_t mode; /* open */ |
28 | int errorno; |
48 | int errorno; |
29 | |
49 | SV *data, *callback; |
30 | SV *data; |
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31 | void *dataptr; |
50 | void *dataptr; |
32 | STRLEN offset; |
51 | STRLEN dataoffset; |
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52 | |
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53 | Stat_t *statdata; |
33 | } aio_cb; |
54 | } aio_cb; |
34 | |
55 | |
35 | typedef aio_cb *aio_req; |
56 | typedef aio_cb *aio_req; |
36 | |
57 | |
37 | static int started; |
58 | static int started; |
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59 | static int nreqs; |
38 | static int reqpipe[2], respipe[2]; |
60 | static int reqpipe[2], respipe[2]; |
39 | |
61 | |
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62 | static aio_req qs, qe; /* queue start, queue end */ |
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63 | |
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64 | static int aio_proc(void *arg); |
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65 | |
40 | static void |
66 | static void |
41 | start_thread(void) |
67 | start_thread (void) |
42 | { |
68 | { |
43 | aio_thread *thr = NEW ( |
69 | aio_thread *thr; |
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70 | |
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71 | New (0, thr, 1, aio_thread); |
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72 | |
44 | __clone (aio_proc, |
73 | if (clone (aio_proc, |
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74 | &(thr->stack[STACKSIZE - 16]), |
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75 | CLONE_VM|CLONE_FS|CLONE_FILES, |
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76 | thr) >= 0) |
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77 | started++; |
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78 | else |
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79 | Safefree (thr); |
45 | } |
80 | } |
46 | |
81 | |
47 | static void |
82 | static void |
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83 | send_reqs (void) |
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84 | { |
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85 | /* this write is atomic */ |
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86 | while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs) |
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87 | { |
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88 | qs = qs->next; |
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89 | if (!qs) qe = 0; |
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90 | } |
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91 | } |
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92 | |
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93 | static void |
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94 | send_req (aio_req req) |
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95 | { |
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96 | nreqs++; |
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97 | req->next = 0; |
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98 | |
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99 | if (qe) |
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100 | { |
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101 | qe->next = req; |
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102 | qe = req; |
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103 | } |
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104 | else |
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105 | qe = qs = req; |
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106 | |
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107 | send_reqs (); |
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108 | } |
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109 | |
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110 | static void |
48 | end_thread(void) |
111 | end_thread (void) |
49 | { |
112 | { |
50 | aio_req req = 0; |
113 | aio_req req; |
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114 | New (0, req, 1, aio_cb); |
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115 | req->type = REQ_QUIT; |
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116 | |
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117 | send_req (req); |
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118 | } |
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119 | |
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120 | static void |
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121 | read_write (pTHX_ |
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122 | int dowrite, int fd, off_t offset, size_t length, |
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123 | SV *data, STRLEN dataoffset, SV *callback) |
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124 | { |
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125 | aio_req req; |
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126 | STRLEN svlen; |
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127 | char *svptr = SvPV (data, svlen); |
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128 | |
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129 | SvUPGRADE (data, SVt_PV); |
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130 | SvPOK_on (data); |
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131 | |
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132 | if (dataoffset < 0) |
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133 | dataoffset += svlen; |
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134 | |
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135 | if (dataoffset < 0 || dataoffset > svlen) |
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136 | croak ("data offset outside of string"); |
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137 | |
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138 | if (dowrite) |
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139 | { |
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140 | /* write: check length and adjust. */ |
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141 | if (length < 0 || length + dataoffset > svlen) |
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142 | length = svlen - dataoffset; |
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143 | } |
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144 | else |
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145 | { |
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146 | /* read: grow scalar as necessary */ |
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147 | svptr = SvGROW (data, length + dataoffset); |
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148 | } |
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149 | |
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150 | if (length < 0) |
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151 | croak ("length must not be negative"); |
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152 | |
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153 | Newz (0, req, 1, aio_cb); |
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154 | |
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155 | if (!req) |
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156 | croak ("out of memory during aio_req allocation"); |
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157 | |
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158 | req->type = dowrite ? REQ_WRITE : REQ_READ; |
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159 | req->fd = fd; |
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160 | req->offset = offset; |
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161 | req->length = length; |
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162 | req->data = SvREFCNT_inc (data); |
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163 | req->dataptr = (char *)svptr + dataoffset; |
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164 | req->callback = SvREFCNT_inc (callback); |
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165 | |
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166 | send_req (req); |
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167 | } |
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168 | |
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169 | static void |
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170 | poll_wait () |
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171 | { |
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172 | fd_set rfd; |
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173 | FD_ZERO(&rfd); |
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174 | FD_SET(respipe[0], &rfd); |
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175 | |
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176 | select (respipe[0] + 1, &rfd, 0, 0, 0); |
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177 | } |
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178 | |
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179 | static int |
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180 | poll_cb (pTHX) |
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181 | { |
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182 | dSP; |
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183 | int count = 0; |
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184 | aio_req req; |
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185 | |
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186 | while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req)) |
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187 | { |
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188 | nreqs--; |
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189 | |
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190 | if (req->type == REQ_QUIT) |
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191 | { |
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192 | Safefree (req->thread); |
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193 | started--; |
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194 | } |
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195 | else |
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196 | { |
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197 | int errorno = errno; |
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198 | errno = req->errorno; |
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199 | |
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200 | if (req->type == REQ_READ) |
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201 | SvCUR_set (req->data, req->dataoffset |
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202 | + req->result > 0 ? req->result : 0); |
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203 | |
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204 | if (req->data) |
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205 | SvREFCNT_dec (req->data); |
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206 | |
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207 | if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT) |
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208 | { |
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209 | PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; |
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210 | PL_laststatval = req->result; |
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211 | PL_statcache = *(req->statdata); |
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212 | |
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213 | Safefree (req->statdata); |
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214 | } |
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215 | |
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216 | PUSHMARK (SP); |
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217 | XPUSHs (sv_2mortal (newSViv (req->result))); |
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218 | PUTBACK; |
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219 | call_sv (req->callback, G_VOID); |
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220 | SPAGAIN; |
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221 | |
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222 | if (req->callback) |
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223 | SvREFCNT_dec (req->callback); |
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224 | |
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225 | errno = errorno; |
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226 | count++; |
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227 | } |
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228 | |
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229 | Safefree (req); |
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230 | } |
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231 | |
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232 | if (qs) |
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233 | send_reqs (); |
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234 | |
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235 | return count; |
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236 | } |
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237 | |
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238 | static sigset_t fullsigset; |
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239 | |
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240 | #undef errno |
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241 | #include <asm/unistd.h> |
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242 | #include <sys/prctl.h> |
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243 | |
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244 | #if BYTE_ORDER == LITTLE_ENDIAN |
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245 | # define LONG_LONG_PAIR(HI, LO) LO, HI |
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246 | #elif BYTE_ORDER == BIG_ENDIAN |
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247 | # define LONG_LONG_PAIR(HI, LO) HI, LO |
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248 | #endif |
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249 | |
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250 | #if __alpha || __ia64 || __hppa || __v850__ |
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251 | # define stat kernelstat |
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252 | # define stat64 kernelstat64 |
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253 | # include <asm/stat.h> |
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254 | # undef stat |
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255 | # undef stat64 |
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256 | #else |
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257 | # define kernelstat stat |
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258 | # define kernelstat64 stat64 |
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259 | #endif |
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260 | |
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261 | #define COPY_STATDATA \ |
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262 | req->statdata->st_dev = statdata.st_dev; \ |
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263 | req->statdata->st_ino = statdata.st_ino; \ |
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264 | req->statdata->st_mode = statdata.st_mode; \ |
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265 | req->statdata->st_nlink = statdata.st_nlink; \ |
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266 | req->statdata->st_uid = statdata.st_uid; \ |
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267 | req->statdata->st_gid = statdata.st_gid; \ |
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268 | req->statdata->st_rdev = statdata.st_rdev; \ |
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269 | req->statdata->st_size = statdata.st_size; \ |
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270 | req->statdata->st_atime = statdata.st_atime; \ |
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271 | req->statdata->st_mtime = statdata.st_mtime; \ |
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272 | req->statdata->st_ctime = statdata.st_ctime; \ |
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273 | req->statdata->st_blksize = statdata.st_blksize; \ |
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274 | req->statdata->st_blocks = statdata.st_blocks; \ |
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275 | |
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276 | static int |
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277 | aio_proc (void *thr_arg) |
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278 | { |
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279 | aio_thread *thr = thr_arg; |
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280 | aio_req req; |
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281 | int errno; |
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282 | |
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283 | /* this is very much kernel-specific :(:(:( */ |
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284 | /* we rely on gcc's ability to create closures. */ |
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285 | _syscall3(int,read,int,fd,char *,buf,size_t,count) |
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286 | _syscall3(int,write,int,fd,char *,buf,size_t,count) |
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287 | |
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288 | _syscall3(int,open,char *,pathname,int,flags,mode_t,mode) |
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289 | _syscall1(int,close,int,fd) |
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290 | |
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291 | #if __NR_pread64 |
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292 | _syscall5(int,pread64,int,fd,char *,buf,size_t,count,unsigned int,offset_lh,unsigned int,offset_hl) |
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293 | _syscall5(int,pwrite64,int,fd,char *,buf,size_t,count,unsigned int,offset_lh,unsigned int,offset_hl) |
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294 | #elif __NR_pread |
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295 | _syscall4(int,pread,int,fd,char *,buf,size_t,count,offset_t,offset) |
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296 | _syscall4(int,pwrite,int,fd,char *,buf,size_t,count,offset_t,offset) |
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297 | #else |
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298 | # error "neither pread nor pread64 defined" |
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299 | #endif |
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300 | |
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301 | |
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302 | #if __NR_stat64 |
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303 | _syscall2(int,stat64, const char *, filename, struct kernelstat64 *, buf) |
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304 | _syscall2(int,lstat64, const char *, filename, struct kernelstat64 *, buf) |
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305 | _syscall2(int,fstat64, int, fd, struct kernelstat64 *, buf) |
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306 | #elif __NR_stat |
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307 | _syscall2(int,stat, const char *, filename, struct kernelstat *, buf) |
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308 | _syscall2(int,lstat, const char *, filename, struct kernelstat *, buf) |
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309 | _syscall2(int,fstat, int, fd, struct kernelstat *, buf) |
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310 | #else |
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311 | # error "neither stat64 nor stat defined" |
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312 | #endif |
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313 | |
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314 | _syscall1(int,unlink, char *, filename); |
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315 | |
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316 | sigprocmask (SIG_SETMASK, &fullsigset, 0); |
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317 | prctl (PR_SET_PDEATHSIG, SIGKILL); |
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318 | |
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319 | /* then loop */ |
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320 | while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req)) |
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321 | { |
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322 | req->thread = thr; |
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323 | errno = 0; /* strictly unnecessary */ |
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324 | |
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325 | switch (req->type) |
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326 | { |
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327 | #if __NR_pread64 |
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328 | case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, |
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329 | LONG_LONG_PAIR (req->offset >> 32, req->offset & 0xffffffff)); break; |
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330 | case REQ_WRITE: req->result = pwrite64(req->fd, req->dataptr, req->length, |
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331 | LONG_LONG_PAIR (req->offset >> 32, req->offset & 0xffffffff)); break; |
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332 | #else |
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333 | case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; |
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334 | case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; |
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335 | #endif |
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336 | #if __NR_stat64 |
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337 | struct kernelstat64 statdata; |
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338 | case REQ_STAT: req->result = stat64 (req->dataptr, &statdata); COPY_STATDATA; break; |
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339 | case REQ_LSTAT: req->result = lstat64 (req->dataptr, &statdata); COPY_STATDATA; break; |
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340 | case REQ_FSTAT: req->result = fstat64 (req->fd, &statdata); COPY_STATDATA; break; |
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341 | #else |
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342 | struct kernelstat statdata; |
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343 | case REQ_STAT: req->result = stat (req->dataptr, &statdata); COPY_STATDATA; break; |
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344 | case REQ_LSTAT: req->result = lstat (req->dataptr, &statdata); COPY_STATDATA; break; |
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345 | case REQ_FSTAT: req->result = fstat (req->fd, &statdata); COPY_STATDATA; break; |
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346 | #endif |
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347 | case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; |
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348 | case REQ_CLOSE: req->result = close (req->fd); break; |
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349 | case REQ_UNLINK: req->result = unlink (req->dataptr); break; |
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350 | |
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351 | case REQ_QUIT: |
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352 | default: |
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353 | write (respipe[1], (void *)&req, sizeof (req)); |
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354 | return 0; |
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355 | } |
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356 | |
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357 | req->errorno = errno; |
51 | write (reqpipe[1], &req, sizeof (aio_req)); |
358 | write (respipe[1], (void *)&req, sizeof (req)); |
52 | nthreads--; |
359 | } |
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360 | |
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361 | return 0; |
53 | } |
362 | } |
54 | |
363 | |
55 | MODULE = Linux::AIO PACKAGE = Linux::AIO |
364 | MODULE = Linux::AIO PACKAGE = Linux::AIO |
56 | |
365 | |
57 | BOOT: |
366 | BOOT: |
58 | { |
367 | { |
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368 | sigfillset (&fullsigset); |
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369 | sigdelset (&fullsigset, SIGTERM); |
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370 | sigdelset (&fullsigset, SIGQUIT); |
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371 | sigdelset (&fullsigset, SIGABRT); |
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372 | sigdelset (&fullsigset, SIGINT); |
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373 | |
59 | if (pipe (reqpipe) || pipe (respipe)) |
374 | if (pipe (reqpipe) || pipe (respipe)) |
60 | croak ("unable to initialize request or result pipe"); |
375 | croak ("unable to initialize request or result pipe"); |
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376 | |
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377 | if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK)) |
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378 | croak ("cannot set result pipe to nonblocking mode"); |
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379 | |
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380 | if (fcntl (respipe[0], F_SETFL, O_NONBLOCK)) |
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381 | croak ("cannot set result pipe to nonblocking mode"); |
61 | } |
382 | } |
62 | |
383 | |
63 | void |
384 | void |
64 | min_parallel(nthreads) |
385 | min_parallel(nthreads) |
65 | int nthreads |
386 | int nthreads |
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387 | PROTOTYPE: $ |
66 | CODE: |
388 | CODE: |
67 | while (nthreads > started) |
389 | while (nthreads > started) |
68 | start_thread (); |
390 | start_thread (); |
69 | |
391 | |
70 | void |
392 | void |
71 | max_parallel(nthreads) |
393 | max_parallel(nthreads) |
72 | int nthreads |
394 | int nthreads |
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395 | PROTOTYPE: $ |
73 | CODE: |
396 | CODE: |
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397 | int cur = started; |
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398 | while (cur > nthreads) |
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399 | { |
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400 | end_thread (); |
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401 | cur--; |
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402 | } |
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403 | |
74 | while (started > nthreads) |
404 | while (started > nthreads) |
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405 | { |
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406 | poll_wait (); |
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407 | poll_cb (aTHX); |
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408 | } |
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409 | |
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410 | void |
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411 | aio_open(pathname,flags,mode,callback) |
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412 | SV * pathname |
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413 | int flags |
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414 | int mode |
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415 | SV * callback |
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416 | PROTOTYPE: $$$$ |
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417 | CODE: |
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418 | aio_req req; |
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419 | |
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420 | Newz (0, req, 1, aio_cb); |
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421 | |
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422 | if (!req) |
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423 | croak ("out of memory during aio_req allocation"); |
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424 | |
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425 | req->type = REQ_OPEN; |
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426 | req->data = newSVsv (pathname); |
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427 | req->dataptr = SvPV_nolen (req->data); |
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428 | req->fd = flags; |
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|
429 | req->mode = mode; |
|
|
430 | req->callback = SvREFCNT_inc (callback); |
|
|
431 | |
75 | end_thread (); |
432 | send_req (req); |
76 | |
433 | |
77 | void |
434 | void |
|
|
435 | aio_close(fh,callback) |
|
|
436 | InputStream fh |
|
|
437 | SV * callback |
|
|
438 | PROTOTYPE: $$ |
|
|
439 | CODE: |
|
|
440 | aio_req req; |
|
|
441 | |
|
|
442 | Newz (0, req, 1, aio_cb); |
|
|
443 | |
|
|
444 | if (!req) |
|
|
445 | croak ("out of memory during aio_req allocation"); |
|
|
446 | |
|
|
447 | req->type = REQ_CLOSE; |
|
|
448 | req->fd = PerlIO_fileno (fh); |
|
|
449 | req->callback = SvREFCNT_inc (callback); |
|
|
450 | |
|
|
451 | send_req (req); |
|
|
452 | |
|
|
453 | void |
78 | read(fh,offset,length,data,dataoffset,callback) |
454 | aio_read(fh,offset,length,data,dataoffset,callback) |
|
|
455 | InputStream fh |
|
|
456 | UV offset |
|
|
457 | IV length |
|
|
458 | SV * data |
|
|
459 | IV dataoffset |
|
|
460 | SV * callback |
|
|
461 | PROTOTYPE: $$$$$$ |
|
|
462 | CODE: |
|
|
463 | read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); |
|
|
464 | |
|
|
465 | void |
|
|
466 | aio_write(fh,offset,length,data,dataoffset,callback) |
|
|
467 | OutputStream fh |
|
|
468 | UV offset |
|
|
469 | IV length |
|
|
470 | SV * data |
|
|
471 | IV dataoffset |
|
|
472 | SV * callback |
|
|
473 | PROTOTYPE: $$$$$$ |
|
|
474 | CODE: |
|
|
475 | read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); |
|
|
476 | |
|
|
477 | void |
|
|
478 | aio_stat(fh_or_path,callback) |
|
|
479 | SV * fh_or_path |
|
|
480 | SV * callback |
|
|
481 | PROTOTYPE: $$ |
|
|
482 | ALIAS: |
|
|
483 | aio_lstat = 1 |
79 | CODE: |
484 | CODE: |
|
|
485 | aio_req req; |
|
|
486 | |
|
|
487 | Newz (0, req, 1, aio_cb); |
|
|
488 | |
|
|
489 | if (!req) |
|
|
490 | croak ("out of memory during aio_req allocation"); |
|
|
491 | |
|
|
492 | New (0, req->statdata, 1, Stat_t); |
|
|
493 | |
|
|
494 | if (!req->statdata) |
|
|
495 | croak ("out of memory during aio_req->statdata allocation"); |
|
|
496 | |
|
|
497 | if (SvPOK (fh_or_path)) |
|
|
498 | { |
|
|
499 | req->type = ix ? REQ_LSTAT : REQ_STAT; |
|
|
500 | req->data = newSVsv (fh_or_path); |
|
|
501 | req->dataptr = SvPV_nolen (req->data); |
|
|
502 | } |
|
|
503 | else |
|
|
504 | { |
|
|
505 | req->type = REQ_FSTAT; |
|
|
506 | req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
|
|
507 | } |
|
|
508 | |
|
|
509 | req->callback = SvREFCNT_inc (callback); |
|
|
510 | |
|
|
511 | send_req (req); |
|
|
512 | |
|
|
513 | void |
|
|
514 | aio_unlink(pathname,callback) |
|
|
515 | SV * pathname |
|
|
516 | SV * callback |
|
|
517 | PROTOTYPE: $$ |
|
|
518 | CODE: |
|
|
519 | aio_req req; |
|
|
520 | |
|
|
521 | Newz (0, req, 1, aio_cb); |
|
|
522 | |
|
|
523 | if (!req) |
|
|
524 | croak ("out of memory during aio_req allocation"); |
|
|
525 | |
|
|
526 | req->type = REQ_UNLINK; |
|
|
527 | req->data = newSVsv (pathname); |
|
|
528 | req->dataptr = SvPV_nolen (req->data); |
|
|
529 | req->callback = SvREFCNT_inc (callback); |
|
|
530 | |
|
|
531 | send_req (req); |
|
|
532 | |
|
|
533 | int |
|
|
534 | poll_fileno() |
|
|
535 | PROTOTYPE: |
|
|
536 | CODE: |
|
|
537 | RETVAL = respipe[0]; |
|
|
538 | OUTPUT: |
|
|
539 | RETVAL |
|
|
540 | |
|
|
541 | int |
|
|
542 | poll_cb(...) |
|
|
543 | PROTOTYPE: |
|
|
544 | CODE: |
|
|
545 | RETVAL = poll_cb (aTHX); |
|
|
546 | OUTPUT: |
|
|
547 | RETVAL |
|
|
548 | |
|
|
549 | void |
|
|
550 | poll_wait() |
|
|
551 | PROTOTYPE: |
|
|
552 | CODE: |
|
|
553 | poll_wait (); |
|
|
554 | |
|
|
555 | int |
|
|
556 | nreqs() |
|
|
557 | PROTOTYPE: |
|
|
558 | CODE: |
|
|
559 | RETVAL = nreqs; |
|
|
560 | OUTPUT: |
|
|
561 | RETVAL |
|
|
562 | |