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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 | |
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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 ;) */ |
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17 | |
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18 | #ifndef __NR_pread64 |
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19 | # define __NR_pread64 __NR_pread |
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20 | #endif |
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21 | #ifndef __NR_pwrite64 |
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22 | # define __NR_pwrite64 __NR_pwrite |
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23 | #endif |
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24 | |
9 | #define STACKSIZE 128 /* yeah */ |
25 | #define STACKSIZE 1024 /* yeah */ |
10 | |
26 | |
11 | #define REQ_QUIT 0 |
27 | 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 | |
28 | |
15 | typedef struct { |
29 | typedef struct { |
16 | char stack[STACKSIZE]; |
30 | char stack[STACKSIZE]; |
17 | } aio_thread; |
31 | } aio_thread; |
18 | |
32 | |
19 | typedef struct { |
33 | typedef struct { |
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 result; |
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 dataoffset; |
45 | STRLEN dataoffset; |
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46 | |
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47 | struct stat64 *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 | |
40 | static int aio_proc(void *arg); |
56 | static int aio_proc(void *arg); |
41 | |
57 | |
42 | static void |
58 | static void |
… | |
… | |
56 | } |
72 | } |
57 | |
73 | |
58 | static void |
74 | static void |
59 | end_thread(void) |
75 | end_thread(void) |
60 | { |
76 | { |
61 | aio_req req = 0; |
77 | aio_req req; |
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78 | New (0, req, 1, aio_cb); |
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79 | req->type = REQ_QUIT; |
62 | write (reqpipe[1], &req, sizeof (aio_req)); |
80 | write (reqpipe[1], &req, sizeof (aio_req)); |
63 | started--; |
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64 | } |
81 | } |
65 | |
82 | |
66 | static void |
83 | static void |
67 | set_errno(int errorno) |
84 | send_req (aio_req req) |
68 | { |
85 | { |
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86 | nreqs++; |
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87 | write (reqpipe[1], &req, sizeof (aio_req)); |
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88 | } |
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89 | |
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90 | static void |
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91 | read_write (pTHX_ |
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92 | int dowrite, int fd, off_t offset, size_t length, |
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93 | SV *data, STRLEN dataoffset, SV*callback) |
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94 | { |
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95 | aio_req req; |
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96 | STRLEN svlen; |
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97 | char *svptr = SvPV (data, svlen); |
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98 | |
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99 | SvUPGRADE (data, SVt_PV); |
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100 | SvPOK_on (data); |
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101 | |
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102 | if (dataoffset < 0) |
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103 | dataoffset += svlen; |
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104 | |
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105 | if (dataoffset < 0 || dataoffset > svlen) |
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106 | croak ("data offset outside of string"); |
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107 | |
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108 | if (dowrite) |
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109 | { |
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110 | /* write: check length and adjust. */ |
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111 | if (length < 0 || length + dataoffset > svlen) |
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112 | length = svlen - dataoffset; |
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113 | } |
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114 | else |
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115 | { |
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116 | /* read: grow scalar as necessary */ |
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117 | svptr = SvGROW (data, length + dataoffset); |
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118 | } |
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119 | |
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120 | if (length < 0) |
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121 | croak ("length must not be negative"); |
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122 | |
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123 | Newz (0, req, 1, aio_cb); |
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124 | |
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125 | if (!req) |
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126 | croak ("out of memory during aio_req allocation"); |
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127 | |
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128 | req->type = dowrite ? REQ_WRITE : REQ_READ; |
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129 | req->fd = fd; |
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130 | req->offset = offset; |
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131 | req->length = length; |
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132 | req->data = SvREFCNT_inc (data); |
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133 | req->dataptr = (char *)svptr + dataoffset; |
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134 | req->callback = SvREFCNT_inc (callback); |
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135 | |
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136 | send_req (req); |
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137 | } |
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138 | |
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139 | static int |
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140 | poll_cb (pTHX) |
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141 | { |
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142 | dSP; |
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143 | int count = 0; |
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144 | aio_req req; |
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145 | |
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146 | while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req)) |
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147 | { |
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148 | if (req->type == REQ_QUIT) |
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149 | { |
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150 | Safefree (req->thread); |
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151 | started--; |
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152 | } |
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153 | else |
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154 | { |
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155 | int errorno = errno; |
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156 | errno = req->errorno; |
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157 | |
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158 | if (req->type == REQ_READ) |
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159 | SvCUR_set (req->data, req->dataoffset |
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160 | + req->result > 0 ? req->result : 0); |
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161 | |
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162 | if (req->data) |
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163 | SvREFCNT_dec (req->data); |
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164 | |
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165 | if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT) |
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166 | { |
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167 | PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; |
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168 | PL_laststatval = req->result; |
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169 | PL_statcache.st_dev = req->statdata->st_dev; |
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170 | PL_statcache.st_ino = req->statdata->st_ino; |
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171 | PL_statcache.st_mode = req->statdata->st_mode; |
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172 | PL_statcache.st_nlink = req->statdata->st_nlink; |
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173 | PL_statcache.st_uid = req->statdata->st_uid; |
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174 | PL_statcache.st_gid = req->statdata->st_gid; |
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175 | PL_statcache.st_rdev = req->statdata->st_rdev; |
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176 | PL_statcache.st_size = req->statdata->st_size; |
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177 | PL_statcache.st_atime = req->statdata->st_atime; |
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178 | PL_statcache.st_mtime = req->statdata->st_mtime; |
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179 | PL_statcache.st_ctime = req->statdata->st_ctime; |
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180 | PL_statcache.st_blksize = req->statdata->st_blksize; |
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181 | PL_statcache.st_blocks = req->statdata->st_blocks; |
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182 | |
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183 | Safefree (req->statdata); |
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184 | } |
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185 | |
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186 | PUSHMARK (SP); |
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187 | XPUSHs (sv_2mortal (newSViv (req->result))); |
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188 | PUTBACK; |
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189 | call_sv (req->callback, G_VOID); |
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190 | SPAGAIN; |
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191 | |
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192 | if (req->callback) |
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193 | SvREFCNT_dec (req->callback); |
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194 | |
69 | errno = errorno; |
195 | errno = errorno; |
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196 | nreqs--; |
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197 | count++; |
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198 | } |
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199 | |
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200 | Safefree (req); |
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201 | } |
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202 | |
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203 | return count; |
70 | } |
204 | } |
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205 | |
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206 | static sigset_t fullsigset; |
71 | |
207 | |
72 | #undef errno |
208 | #undef errno |
73 | #include <asm/unistd.h> |
209 | #include <asm/unistd.h> |
74 | |
210 | |
75 | static int |
211 | static int |
76 | aio_proc(void *thr_arg) |
212 | aio_proc(void *thr_arg) |
77 | { |
213 | { |
78 | aio_thread *thr = thr_arg; |
214 | aio_thread *thr = thr_arg; |
79 | int sig; |
215 | aio_req req; |
80 | int errno; |
216 | int errno; |
81 | aio_req req; |
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82 | |
217 | |
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218 | /* this is very much x86 and kernel-specific :(:(:( */ |
83 | /* we rely on gcc's ability to create closures. */ |
219 | /* we rely on gcc's ability to create closures. */ |
84 | _syscall3(int,lseek,int,fd,off_t,offset,int,whence); |
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85 | _syscall3(int,read,int,fd,char *,buf,off_t,count); |
220 | _syscall3(int,read,int,fd,char *,buf,size_t,count) |
86 | _syscall3(int,write,int,fd,char *,buf,off_t,count); |
221 | _syscall3(int,write,int,fd,char *,buf,size_t,count) |
87 | |
222 | |
88 | /* first get rid of any signals */ |
223 | _syscall3(int,open,char *,pathname,int,flags,mode_t,mode) |
89 | for (sig = 1; sig < _NSIG; sig++) |
224 | _syscall1(int,close,int,fd) |
90 | if (sig != SIGTERM) |
225 | |
91 | signal (sig, SIG_IGN); |
226 | _syscall5(int,pread64,int,fd,char *,buf,size_t,count,unsigned int,offset_lo,unsigned int,offset_hi) |
92 | |
227 | _syscall5(int,pwrite64,int,fd,char *,buf,size_t,count,unsigned int,offset_lo,unsigned int,offset_hi) |
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228 | |
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229 | _syscall2(int,stat64, const char *, filename, struct stat64 *, buf) |
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230 | _syscall2(int,lstat64, const char *, filename, struct stat64 *, buf) |
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231 | _syscall2(int,fstat64, int, fd, struct stat64 *, buf) |
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232 | |
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233 | sigprocmask (SIG_SETMASK, &fullsigset, 0); |
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234 | |
93 | /* then loop */ |
235 | /* then loop */ |
94 | while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req)) |
236 | while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req)) |
95 | { |
237 | { |
96 | req->thread = thr; |
238 | req->thread = thr; |
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239 | errno = 0; /* strictly unnecessary */ |
97 | |
240 | |
98 | if (req->type == REQ_READ || req->type == REQ_WRITE) |
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99 | { |
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100 | errno = 0; |
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101 | |
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102 | if (lseek (req->fd, req->offset, SEEK_SET) == req->offset) |
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103 | { |
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104 | if (req->type == REQ_READ) |
241 | if (req->type == REQ_READ) |
105 | req->result = read (req->fd, req->dataptr, req->length); |
242 | req->result = pread64 (req->fd, req->dataptr, req->length, req->offset & 0xffffffff, req->offset >> 32); |
106 | else |
243 | else if (req->type == REQ_WRITE) |
107 | req->result = write(req->fd, req->dataptr, req->length); |
244 | req->result = pwrite64(req->fd, req->dataptr, req->length, req->offset & 0xffffffff, req->offset >> 32); |
108 | } |
245 | else if (req->type == REQ_OPEN) |
109 | |
246 | req->result = open (req->dataptr, req->fd, req->mode); |
110 | req->errorno = errno; |
247 | else if (req->type == REQ_CLOSE) |
111 | } |
248 | req->result = close (req->fd); |
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249 | else if (req->type == REQ_STAT) |
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250 | req->result = stat64 (req->dataptr, req->statdata); |
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251 | else if (req->type == REQ_LSTAT) |
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252 | req->result = lstat64 (req->dataptr, req->statdata); |
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253 | else if (req->type == REQ_FSTAT) |
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254 | req->result = fstat64 (req->fd, req->statdata); |
112 | else |
255 | else |
113 | { |
256 | { |
114 | write (respipe[1], (void *)&req, sizeof (req)); |
257 | write (respipe[1], (void *)&req, sizeof (req)); |
115 | break; |
258 | break; |
116 | } |
259 | } |
117 | |
260 | |
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261 | req->errorno = errno; |
118 | write (respipe[1], (void *)&req, sizeof (req)); |
262 | write (respipe[1], (void *)&req, sizeof (req)); |
119 | } |
263 | } |
120 | |
264 | |
121 | return 0; |
265 | return 0; |
122 | } |
266 | } |
123 | |
267 | |
124 | MODULE = Linux::AIO PACKAGE = Linux::AIO |
268 | MODULE = Linux::AIO PACKAGE = Linux::AIO |
125 | |
269 | |
126 | BOOT: |
270 | BOOT: |
127 | { |
271 | { |
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272 | sigfillset (&fullsigset); |
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273 | sigdelset (&fullsigset, SIGTERM); |
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274 | sigdelset (&fullsigset, SIGQUIT); |
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275 | sigdelset (&fullsigset, SIGABRT); |
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276 | sigdelset (&fullsigset, SIGINT); |
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277 | |
128 | if (pipe (reqpipe) || pipe (respipe)) |
278 | if (pipe (reqpipe) || pipe (respipe)) |
129 | croak ("unable to initialize request or result pipe"); |
279 | croak ("unable to initialize request or result pipe"); |
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280 | |
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281 | if (fcntl (respipe[0], F_SETFL, O_NONBLOCK)) |
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282 | croak ("cannot set result pipe to nonblocking mode"); |
130 | } |
283 | } |
131 | |
284 | |
132 | void |
285 | void |
133 | min_parallel(nthreads) |
286 | min_parallel(nthreads) |
134 | int nthreads |
287 | int nthreads |
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288 | PROTOTYPE: $ |
135 | CODE: |
289 | CODE: |
136 | while (nthreads > started) |
290 | while (nthreads > started) |
137 | start_thread (); |
291 | start_thread (); |
138 | |
292 | |
139 | void |
293 | void |
140 | max_parallel(nthreads) |
294 | max_parallel(nthreads) |
141 | int nthreads |
295 | int nthreads |
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296 | PROTOTYPE: $ |
142 | CODE: |
297 | CODE: |
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298 | int cur = started; |
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299 | while (cur > nthreads) |
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300 | { |
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301 | end_thread (); |
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302 | cur--; |
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303 | } |
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304 | |
143 | while (started > nthreads) |
305 | while (started > nthreads) |
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306 | { |
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307 | fd_set rfd; |
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308 | FD_ZERO(&rfd); |
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309 | FD_SET(respipe[0], &rfd); |
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310 | |
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311 | select (respipe[0] + 1, &rfd, 0, 0, 0); |
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312 | poll_cb (aTHX); |
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313 | } |
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314 | |
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315 | void |
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316 | aio_open(pathname,flags,mode,callback) |
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317 | SV * pathname |
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318 | int flags |
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319 | int mode |
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320 | SV * callback |
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321 | PROTOTYPE: $$$$ |
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322 | CODE: |
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323 | aio_req req; |
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324 | |
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325 | Newz (0, req, 1, aio_cb); |
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326 | |
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327 | if (!req) |
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328 | croak ("out of memory during aio_req allocation"); |
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329 | |
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330 | req->type = REQ_OPEN; |
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331 | req->data = newSVsv (pathname); |
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332 | req->dataptr = SvPV_nolen (req->data); |
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333 | req->fd = flags; |
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334 | req->mode = mode; |
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335 | req->callback = SvREFCNT_inc (callback); |
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336 | |
144 | end_thread (); |
337 | send_req (req); |
145 | |
338 | |
146 | void |
339 | void |
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340 | aio_close(fh,callback) |
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341 | InputStream fh |
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342 | SV * callback |
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343 | PROTOTYPE: $$ |
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344 | CODE: |
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345 | aio_req req; |
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346 | |
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347 | Newz (0, req, 1, aio_cb); |
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348 | |
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349 | if (!req) |
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350 | croak ("out of memory during aio_req allocation"); |
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351 | |
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352 | req->type = REQ_CLOSE; |
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353 | req->fd = PerlIO_fileno (fh); |
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354 | req->callback = SvREFCNT_inc (callback); |
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355 | |
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356 | send_req (req); |
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357 | |
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358 | void |
147 | read(fh,offset,length,data,dataoffset,callback) |
359 | aio_read(fh,offset,length,data,dataoffset,callback) |
148 | ALIAS: |
360 | InputStream fh |
149 | write = 1 |
361 | UV offset |
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362 | IV length |
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363 | SV * data |
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364 | IV dataoffset |
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365 | SV * callback |
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366 | PROTOTYPE: $$$$$$ |
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367 | CODE: |
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368 | read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); |
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369 | |
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370 | void |
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371 | aio_write(fh,offset,length,data,dataoffset,callback) |
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372 | OutputStream fh |
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373 | UV offset |
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374 | IV length |
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375 | SV * data |
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376 | IV dataoffset |
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377 | SV * callback |
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378 | PROTOTYPE: $$$$$$ |
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379 | CODE: |
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380 | read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); |
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381 | |
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382 | void |
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383 | aio_stat(fh_or_path,callback) |
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384 | SV * fh_or_path |
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385 | SV * callback |
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386 | PROTOTYPE: $$ |
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387 | ALIAS: |
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388 | aio_lstat = 1 |
150 | CODE: |
389 | CODE: |
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390 | aio_req req; |
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391 | |
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392 | Newz (0, req, 1, aio_cb); |
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393 | |
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394 | if (!req) |
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395 | croak ("out of memory during aio_req allocation"); |
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396 | |
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397 | New (0, req->statdata, 1, struct stat64); |
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398 | |
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399 | if (!req->statdata) |
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400 | croak ("out of memory during aio_req->statdata allocation"); |
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401 | |
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402 | if (SvPOK (fh_or_path)) |
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403 | { |
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404 | req->type = ix ? REQ_LSTAT : REQ_STAT; |
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405 | req->data = newSVsv (fh_or_path); |
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406 | req->dataptr = SvPV_nolen (req->data); |
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407 | } |
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408 | else |
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409 | { |
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410 | req->type = REQ_FSTAT; |
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411 | req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
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412 | } |
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413 | |
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414 | req->callback = SvREFCNT_inc (callback); |
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415 | |
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416 | send_req (req); |
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417 | |
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418 | int |
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419 | poll_fileno() |
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420 | PROTOTYPE: |
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421 | CODE: |
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422 | RETVAL = respipe[0]; |
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423 | OUTPUT: |
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424 | RETVAL |
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425 | |
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426 | int |
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427 | poll_cb(...) |
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428 | PROTOTYPE: |
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429 | CODE: |
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430 | RETVAL = poll_cb (aTHX); |
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431 | OUTPUT: |
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432 | RETVAL |
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433 | |
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434 | int |
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435 | nreqs() |
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436 | PROTOTYPE: |
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437 | CODE: |
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438 | RETVAL = nreqs; |
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439 | OUTPUT: |
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440 | RETVAL |
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441 | |