1 | #include "EXTERN.h" |
1 | #include "EXTERN.h" |
2 | #include "perl.h" |
2 | #include "perl.h" |
3 | #include "XSUB.h" |
3 | #include "XSUB.h" |
4 | |
4 | |
5 | #include <sys/types.h> |
5 | #include <sys/types.h> |
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|
6 | #include <sys/stat.h> |
6 | #include <unistd.h> |
7 | #include <unistd.h> |
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8 | #include <fcntl.h> |
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9 | #include <signal.h> |
7 | #include <sched.h> |
10 | #include <sched.h> |
8 | |
11 | |
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12 | typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
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13 | typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
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14 | typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
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15 | |
9 | #define STACKSIZE 128 /* yeah */ |
16 | #define STACKSIZE 1024 /* yeah */ |
10 | |
17 | |
11 | #define REQ_EXIT 0 |
18 | enum { REQ_QUIT, REQ_OPEN, REQ_CLOSE, REQ_READ, REQ_WRITE, REQ_STAT, REQ_LSTAT, REQ_FSTAT}; |
12 | #define REQ_READ 1 |
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13 | #define REQ_WRITE 2 |
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14 | |
19 | |
15 | typedef struct { |
20 | typedef struct { |
16 | char stack[STACKSIZE]; |
21 | char stack[STACKSIZE]; |
17 | } aio_thread; |
22 | } aio_thread; |
18 | |
23 | |
19 | typedef struct { |
24 | typedef struct { |
20 | int type; |
25 | int type; |
21 | aio_thread *thread; |
26 | aio_thread *thread; |
22 | |
27 | |
23 | /* read/write */ |
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24 | int fd; |
28 | int fd; |
25 | off_t offset; |
29 | off_t offset; |
26 | size_t length; |
30 | size_t length; |
27 | ssize_t done; |
31 | ssize_t result; |
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32 | mode_t mode; /* open */ |
28 | int errorno; |
33 | int errorno; |
29 | |
34 | SV *data, *callback; |
30 | SV *data; |
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31 | void *dataptr; |
35 | void *dataptr; |
32 | STRLEN offset; |
36 | STRLEN dataoffset; |
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37 | |
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38 | struct stat64 *statdata; |
33 | } aio_cb; |
39 | } aio_cb; |
34 | |
40 | |
35 | typedef aio_cb *aio_req; |
41 | typedef aio_cb *aio_req; |
36 | |
42 | |
37 | static int started; |
43 | static int started; |
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44 | static int nreqs; |
38 | static int reqpipe[2], respipe[2]; |
45 | static int reqpipe[2], respipe[2]; |
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46 | |
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47 | static int aio_proc(void *arg); |
39 | |
48 | |
40 | static void |
49 | static void |
41 | start_thread(void) |
50 | start_thread(void) |
42 | { |
51 | { |
43 | aio_thread *thr = NEW ( |
52 | aio_thread *thr; |
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53 | |
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54 | New (0, thr, 1, aio_thread); |
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55 | |
44 | __clone (aio_proc, |
56 | if (clone (aio_proc, |
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57 | &(thr->stack[STACKSIZE]), |
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58 | CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND, |
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59 | thr) >= 0) |
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60 | started++; |
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61 | else |
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62 | Safefree (thr); |
45 | } |
63 | } |
46 | |
64 | |
47 | static void |
65 | static void |
48 | end_thread(void) |
66 | end_thread(void) |
49 | { |
67 | { |
50 | aio_req req = 0; |
68 | aio_req req; |
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69 | New (0, req, 1, aio_cb); |
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70 | req->type = REQ_QUIT; |
51 | write (reqpipe[1], &req, sizeof (aio_req)); |
71 | write (reqpipe[1], &req, sizeof (aio_req)); |
52 | nthreads--; |
72 | } |
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73 | |
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74 | static void |
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75 | send_req (aio_req req) |
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76 | { |
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77 | nreqs++; |
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78 | write (reqpipe[1], &req, sizeof (aio_req)); |
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79 | } |
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80 | |
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81 | static void |
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82 | read_write (pTHX_ int dowrite, int fd, off_t offset, size_t length, |
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83 | SV *data, STRLEN dataoffset, SV*callback) |
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84 | { |
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85 | aio_req req; |
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86 | STRLEN svlen; |
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87 | char *svptr = SvPV (data, svlen); |
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88 | |
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89 | SvUPGRADE (data, SVt_PV); |
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90 | SvPOK_on (data); |
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91 | |
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92 | if (dataoffset < 0) |
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93 | dataoffset += svlen; |
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94 | |
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95 | if (dataoffset < 0 || dataoffset > svlen) |
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96 | croak ("data offset outside of string"); |
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97 | |
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98 | if (dowrite) |
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99 | { |
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100 | /* write: check length and adjust. */ |
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101 | if (length < 0 || length + dataoffset > svlen) |
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102 | length = svlen - dataoffset; |
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103 | } |
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104 | else |
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105 | { |
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106 | /* read: grow scalar as necessary */ |
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107 | svptr = SvGROW (data, length + dataoffset); |
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108 | } |
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109 | |
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110 | if (length < 0) |
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111 | croak ("length must not be negative"); |
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112 | |
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113 | Newz (0, req, 1, aio_cb); |
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114 | |
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115 | if (!req) |
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116 | croak ("out of memory during aio_req allocation"); |
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117 | |
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118 | req->type = dowrite ? REQ_WRITE : REQ_READ; |
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119 | req->fd = fd; |
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120 | req->offset = offset; |
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121 | req->length = length; |
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122 | req->data = SvREFCNT_inc (data); |
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123 | req->dataptr = (char *)svptr + dataoffset; |
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124 | req->callback = SvREFCNT_inc (callback); |
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125 | |
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126 | send_req (req); |
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127 | } |
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128 | |
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129 | static int |
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130 | poll_cb (pTHX) |
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131 | { |
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132 | dSP; |
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133 | int count = 0; |
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134 | aio_req req; |
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135 | |
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136 | while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req)) |
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137 | { |
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138 | if (req->type == REQ_QUIT) |
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139 | { |
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140 | Safefree (req->thread); |
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141 | started--; |
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142 | } |
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143 | else |
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144 | { |
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145 | int errorno = errno; |
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146 | errno = req->errorno; |
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147 | |
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148 | if (req->type == REQ_READ) |
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149 | SvCUR_set (req->data, req->dataoffset |
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150 | + req->result > 0 ? req->result : 0); |
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151 | |
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152 | if (req->data) |
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153 | SvREFCNT_dec (req->data); |
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154 | |
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155 | if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT) |
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156 | { |
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157 | PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; |
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158 | PL_laststatval = req->result; |
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159 | PL_statcache.st_dev = req->statdata->st_dev; |
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160 | PL_statcache.st_ino = req->statdata->st_ino; |
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161 | PL_statcache.st_mode = req->statdata->st_mode; |
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162 | PL_statcache.st_nlink = req->statdata->st_nlink; |
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163 | PL_statcache.st_uid = req->statdata->st_uid; |
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164 | PL_statcache.st_gid = req->statdata->st_gid; |
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165 | PL_statcache.st_rdev = req->statdata->st_rdev; |
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166 | PL_statcache.st_size = req->statdata->st_size; |
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167 | PL_statcache.st_atime = req->statdata->st_atime; |
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168 | PL_statcache.st_mtime = req->statdata->st_mtime; |
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169 | PL_statcache.st_ctime = req->statdata->st_ctime; |
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170 | PL_statcache.st_blksize = req->statdata->st_blksize; |
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171 | PL_statcache.st_blocks = req->statdata->st_blocks; |
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172 | |
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173 | Safefree (req->statdata); |
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174 | } |
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175 | |
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176 | PUSHMARK (SP); |
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177 | XPUSHs (sv_2mortal (newSViv (req->result))); |
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178 | PUTBACK; |
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179 | call_sv (req->callback, G_VOID); |
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180 | SPAGAIN; |
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181 | |
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182 | if (req->callback) |
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183 | SvREFCNT_dec (req->callback); |
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184 | |
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185 | errno = errorno; |
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186 | nreqs--; |
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187 | count++; |
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188 | } |
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189 | |
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190 | Safefree (req); |
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191 | } |
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192 | |
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193 | return count; |
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194 | } |
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195 | |
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196 | static sigset_t fullsigset; |
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197 | |
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198 | #undef errno |
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199 | #include <asm/unistd.h> |
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200 | |
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201 | static int |
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202 | aio_proc(void *thr_arg) |
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203 | { |
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204 | aio_thread *thr = thr_arg; |
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205 | aio_req req; |
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206 | int errno; |
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207 | |
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208 | /* this is very much x86 and kernel-specific :(:(:( */ |
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209 | /* we rely on gcc's ability to create closures. */ |
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210 | _syscall3(int,read,int,fd,char *,buf,size_t,count) |
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211 | _syscall3(int,write,int,fd,char *,buf,size_t,count) |
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212 | |
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213 | _syscall3(int,open,char *,pathname,int,flags,mode_t,mode) |
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214 | _syscall1(int,close,int,fd) |
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215 | |
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216 | _syscall5(int,pread,int,fd,char *,buf,size_t,count,unsigned int,offset_lo,unsigned int,offset_hi) |
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217 | _syscall5(int,pwrite,int,fd,char *,buf,size_t,count,unsigned int,offset_lo,unsigned int,offset_hi) |
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218 | |
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219 | _syscall2(int,stat64, const char *, filename, struct stat64 *, buf) |
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220 | _syscall2(int,lstat64, const char *, filename, struct stat64 *, buf) |
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221 | _syscall2(int,fstat64, int, fd, struct stat64 *, buf) |
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222 | |
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223 | sigprocmask (SIG_SETMASK, &fullsigset, 0); |
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224 | |
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225 | /* then loop */ |
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226 | while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req)) |
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227 | { |
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228 | req->thread = thr; |
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229 | errno = 0; /* strictly unnecessary */ |
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230 | |
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231 | if (req->type == REQ_READ) |
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232 | req->result = pread (req->fd, req->dataptr, req->length, req->offset & 0xffffffff, req->offset >> 32); |
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233 | else if (req->type == REQ_WRITE) |
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234 | req->result = pwrite(req->fd, req->dataptr, req->length, req->offset & 0xffffffff, req->offset >> 32); |
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235 | else if (req->type == REQ_OPEN) |
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236 | req->result = open (req->dataptr, req->fd, req->mode); |
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237 | else if (req->type == REQ_CLOSE) |
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238 | req->result = close (req->fd); |
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239 | else if (req->type == REQ_STAT) |
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240 | req->result = stat64 (req->dataptr, req->statdata); |
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241 | else if (req->type == REQ_LSTAT) |
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242 | req->result = lstat64 (req->dataptr, req->statdata); |
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243 | else if (req->type == REQ_FSTAT) |
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244 | req->result = fstat64 (req->fd, req->statdata); |
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245 | else |
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246 | { |
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247 | write (respipe[1], (void *)&req, sizeof (req)); |
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248 | break; |
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249 | } |
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250 | |
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251 | req->errorno = errno; |
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252 | write (respipe[1], (void *)&req, sizeof (req)); |
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253 | } |
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254 | |
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255 | return 0; |
53 | } |
256 | } |
54 | |
257 | |
55 | MODULE = Linux::AIO PACKAGE = Linux::AIO |
258 | MODULE = Linux::AIO PACKAGE = Linux::AIO |
56 | |
259 | |
57 | BOOT: |
260 | BOOT: |
58 | { |
261 | { |
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262 | sigfillset (&fullsigset); |
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263 | sigdelset (&fullsigset, SIGTERM); |
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264 | sigdelset (&fullsigset, SIGQUIT); |
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265 | sigdelset (&fullsigset, SIGABRT); |
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266 | sigdelset (&fullsigset, SIGINT); |
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267 | |
59 | if (pipe (reqpipe) || pipe (respipe)) |
268 | if (pipe (reqpipe) || pipe (respipe)) |
60 | croak ("unable to initialize request or result pipe"); |
269 | croak ("unable to initialize request or result pipe"); |
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270 | |
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271 | if (fcntl (respipe[0], F_SETFL, O_NONBLOCK)) |
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272 | croak ("cannot set result pipe to nonblocking mode"); |
61 | } |
273 | } |
62 | |
274 | |
63 | void |
275 | void |
64 | min_parallel(nthreads) |
276 | min_parallel(nthreads) |
65 | int nthreads |
277 | int nthreads |
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278 | PROTOTYPE: $ |
66 | CODE: |
279 | CODE: |
67 | while (nthreads > started) |
280 | while (nthreads > started) |
68 | start_thread (); |
281 | start_thread (); |
69 | |
282 | |
70 | void |
283 | void |
71 | max_parallel(nthreads) |
284 | max_parallel(nthreads) |
72 | int nthreads |
285 | int nthreads |
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286 | PROTOTYPE: $ |
73 | CODE: |
287 | CODE: |
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288 | int cur = started; |
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289 | while (cur > nthreads) |
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290 | { |
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291 | end_thread (); |
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292 | cur--; |
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293 | } |
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294 | |
74 | while (started > nthreads) |
295 | while (started > nthreads) |
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296 | { |
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297 | fd_set rfd; |
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298 | FD_ZERO(&rfd); |
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299 | FD_SET(respipe[0], &rfd); |
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300 | |
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301 | select (respipe[0] + 1, &rfd, 0, 0, 0); |
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302 | poll_cb (); |
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303 | } |
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304 | |
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305 | void |
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306 | aio_open(pathname,flags,mode,callback) |
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307 | SV * pathname |
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308 | int flags |
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309 | int mode |
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310 | SV * callback |
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311 | PROTOTYPE: $$$$ |
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312 | CODE: |
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313 | aio_req req; |
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314 | |
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315 | Newz (0, req, 1, aio_cb); |
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316 | |
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317 | if (!req) |
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318 | croak ("out of memory during aio_req allocation"); |
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319 | |
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320 | req->type = REQ_OPEN; |
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321 | req->data = newSVsv (pathname); |
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322 | req->dataptr = SvPV_nolen (req->data); |
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323 | req->fd = flags; |
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324 | req->mode = mode; |
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325 | req->callback = SvREFCNT_inc (callback); |
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326 | |
75 | end_thread (); |
327 | send_req (req); |
76 | |
328 | |
77 | void |
329 | void |
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330 | aio_close(fh,callback) |
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331 | InputStream fh |
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332 | SV * callback |
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333 | PROTOTYPE: $$ |
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334 | CODE: |
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335 | aio_req req; |
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336 | |
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337 | Newz (0, req, 1, aio_cb); |
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338 | |
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339 | if (!req) |
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340 | croak ("out of memory during aio_req allocation"); |
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341 | |
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342 | req->type = REQ_CLOSE; |
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343 | req->fd = PerlIO_fileno (fh); |
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344 | req->callback = SvREFCNT_inc (callback); |
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345 | |
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346 | send_req (req); |
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347 | |
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348 | void |
78 | read(fh,offset,length,data,dataoffset,callback) |
349 | aio_read(fh,offset,length,data,dataoffset,callback) |
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350 | InputStream fh |
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351 | UV offset |
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352 | IV length |
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353 | SV * data |
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354 | IV dataoffset |
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355 | SV * callback |
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356 | PROTOTYPE: $$$$$$ |
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357 | CODE: |
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358 | read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); |
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359 | |
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360 | void |
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361 | aio_write(fh,offset,length,data,dataoffset,callback) |
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362 | OutputStream fh |
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363 | UV offset |
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364 | IV length |
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365 | SV * data |
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366 | IV dataoffset |
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367 | SV * callback |
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368 | PROTOTYPE: $$$$$$ |
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369 | CODE: |
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370 | read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); |
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371 | |
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372 | void |
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373 | aio_stat(fh_or_path,callback) |
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374 | SV * fh_or_path |
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375 | SV * callback |
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376 | PROTOTYPE: $$ |
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377 | ALIAS: |
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378 | aio_lstat = 1 |
79 | CODE: |
379 | CODE: |
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380 | aio_req req; |
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381 | |
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382 | Newz (0, req, 1, aio_cb); |
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383 | |
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384 | if (!req) |
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385 | croak ("out of memory during aio_req allocation"); |
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386 | |
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387 | New (0, req->statdata, 1, struct stat64); |
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388 | |
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389 | if (!req->statdata) |
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390 | croak ("out of memory during aio_req->statdata allocation"); |
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391 | |
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392 | if (SvPOK (fh_or_path)) |
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393 | { |
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394 | req->type = ix ? REQ_LSTAT : REQ_STAT; |
|
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395 | req->data = newSVsv (fh_or_path); |
|
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396 | req->dataptr = SvPV_nolen (req->data); |
|
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397 | } |
|
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398 | else |
|
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399 | { |
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400 | req->type = REQ_FSTAT; |
|
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401 | req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
|
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402 | } |
|
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403 | |
|
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404 | req->callback = SvREFCNT_inc (callback); |
|
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405 | |
|
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406 | send_req (req); |
|
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407 | |
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408 | int |
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409 | poll_fileno() |
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410 | PROTOTYPE: |
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411 | CODE: |
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412 | RETVAL = respipe[0]; |
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413 | OUTPUT: |
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414 | RETVAL |
|
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415 | |
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416 | int |
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417 | poll_cb(...) |
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418 | PROTOTYPE: |
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419 | CODE: |
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420 | RETVAL = poll_cb (aTHX); |
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421 | OUTPUT: |
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422 | RETVAL |
|
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423 | |
|
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424 | int |
|
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425 | nreqs() |
|
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426 | PROTOTYPE: |
|
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427 | CODE: |
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428 | RETVAL = nreqs; |
|
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429 | OUTPUT: |
|
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430 | RETVAL |
|
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431 | |